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ESTIMATES OF MONTHLY STREAMFLOW CHARACTERISTICS AT SELECTED SITES IN THE

UPPER MISSOURI RIVER BASIN, MONTANA, BASE PERIOD WATER YEARS 1937-86

by Charles Parrett, Dave R. Johnson, and J.A. Hull

U.S. GEOLOGICAL SURVEY

Water-Resources Investigations Report 89-4082

Prepared in cooperation with the

MONTANA DEPARTMENT OF FISH, WILDLIFE and PARKS

Helena, Montana 1989

DEPARTMENT OF THE INTERIOR

MANUEL LUJAN, JR., Secretary

GEOLOGICAL SURVEY

Dallas L. Peck, Director

For additional information write to:

District ChiefIUS. Geological Survey428 Federal Building301 South Park, Drawer 10076Helena, MT 59626-0076

of this report can be purchased from:

U.SV Geological SurveyBooks and Open-File Reports SectionFederal Center, Bldgr 810Box 25425Denver, CO: 80225-0425

CONTENTS

Page

Abstract.................................... 1Introduction. ................................. 2Purpose and scope .............................. 2Streamflow data ............................... 3

Developing a common base period ........................ 3Estimates of monthly streamflow characteristics ................ 7Basin-characteristics method. ........................ 7Channel-width method. ............................ 9Concurrent-measurement method ........................ 10Weighted-average-estimate method. ...................... 13Drainage-area-ratio adjustment method .................... 14

Reliability of estimates. ........................... 14Summary and conclusions ............................ 17References cited. ............................... 19Supplemental data ............................... 20

ILLUSTRATIONS

Figure 1. Map showing location of ungaged sites and of streamflow-gagingstations ............................. 4

2-4. Graphs showing:2. Lines for the curve-fitting technique and ordinary least-squares

regression .......................... 113. Number of streamflow-gaging stations with various lengths of

record in the 1937-86 base period. .............. 154. Average standard errors of estimated monthly streamflow

characteristics for various record lengths .......... 17

TABLES

Table 1. Sites and methods used for estimating monthly streamflowcharacteristics .......................... 21

2. Streamflow-gaging stations used for record-extension analysis .... 283. Change in average inter-station correlation as a result of record

extension ............................. 314. Estimated monthly streamflow characteristics for October and

November. ............................. 325. Estimated monthly streamflow characteristics for December and

January .............................. 406. Estimated monthly strearaflow characteristics for February and March . 487. Estimated monthly streamflow characteristics for April and May. ... 568. Estimated monthly streamflow characteristics for June and July. ... 649. Estimated monthly streamflow characteristics for August and

September ............................. 7210. Estimated mean annual streamflow. .................. 8011. Results of basin-characteristics regression analysis. ........ 8612. Results of channel-width regression analysis. ............ 88

III

TABLES Continued

Page

Table 13. Streamflow-gaging stations used in test of concurrent-measurementmethod. .............................. 90

14. Standard errors for three methods. ................. 9115. Weights and standard errors for various combinations of methods. . . 9216. Streamflow-gaging stations used in test of record-extension

procedure. ............................ 10117. Standard errors for record-extension procedure for various record

lengths. ............................. 102

CONVERSIONS FACTORS

The following factors can be used to convert inch-pound units in this report to metric (International System) units.

Multiply inch-pound unit By To obtain metric unit

cubic foot per second (ft /s) 0.028317 cubic meter per secondfoot (ft) 0.3048 meterfoot per mile 0.1894 meter per kilometerinch 25.4 millimetermile 1.609 kilometersquare mile 2.590 square kilometer

Sea level: In this report "sea level" refers to the National Geodetic Vertical Datum of 1929 (NGVD of 1929) A geodetic datura derived from a general adjustment of the first-order level nets of both the United States and Canada, formerly called "Sea Level Datura of 1929."

IV

ESTIMATES OF MONTHLY STREAMFLOW CHARACTERISTICS AT SELECTED SITES IN THE UPPER MISSOURI RIVER BASIN, MONTANA, BASE PERIOD WATER YEARS 1937-86

by

Charles Parrett, Dave R. Johnson, and J.A. Hull

ABSTRACT

Estimates of monthly strearaflow characteristics (monthly mean flow that is exceeded 90, 80, 50, and 20 percent of the time for all years of record and mean monthly flow) were made and are presented in tabular form for 312 sites in the Missouri River basin upstream from Fort Peck Lake in Montana. The estimates were based on data for water years 1937-86. Data from 154 gaging stations in and near the study area were used in a mixed- station record-extension procedure to extend short-term records to the 1937-86 base period. One hundred of the sites needing estimates had some gaged data available, and the gaged records, extended as required to the 1937-86 base period, were used to estimate the monthly streamflow charac teristics .

Data from 47 gaged sites were used in regression analyses relating the monthly streamflow characteristics to drainage area and mean annual precipitation (basin-characteristics equations) and to active-channel width (channel-width equations). The basin-characteristics equations had stand ard errors of estimate ranging from 35 to 97 percent. The channel-width equations had standard errors of estimate ranging from 36 to 103 percent. The basin-characteristics equations were used to estimate monthly streamflow characteristics at 179 ungaged sites, and the channel-width equations were used to estimate monthly streamflow characteristics at 138 ungaged sites .

Miscellaneous measurements of streamflow available at 139 ungaged sites were correlated with concurrent streamflows at nearby gaged sites to provide estimates of the monthly streamflow characteristics. The relia bility of the concurrent-measurement method was estimated by applying the method to 20 pairs of gages. On the basis of the test results, the stand ard errors of the concurrent-measurement method were estimated to range from 31 to 111 percent.

At 139 ungaged sites needing estimates, more than one of the above methods were used to estimate monthly streamflow characteristics, and the estimates from each of the individual methods were weighted and combined in accordance with the variance and degree of independence of the indi vidual methods. When estimates from all three estimating methods were combined, the standard errors were estimated to range from 24 to 63 per cent .

Finally, a drainage-area-ratio adjustment method was used to estimate monthly streamflow characteristics at seven ungaged sites. Although not: rigorously tested, the reliability of the drainage-area-ratio adjustment method was estimated to be about equal to that of the basin-characteristics method.

1

Estimates of monthly streamflow characteristics from gaged records were considered to be the most reliable, and estimates at sites with actual flow record from 1937-86 were considered to be completely reliable (zero error). Twenty gaged sites were used to test the reliability of the record-extension procedure when 5, 15, 25, and 35 years of record were available for 1937-86. The standard errors for the worst case, where only 5 years of record were available, ranged from 9 to 54 percent. For 35 years of record, the standard errors ranged from 2 to 23 percent.

Weighted-average estimates were considered to be the most reliable estimates made at ungaged sites. The concurrent-measurement method gen erally provided the most reliable estimates at ungaged sites where only one method was used.

INTRODUCTION

Although the upper Missouri River basin in Montana generally has an abundant supply of surface water, the large demands coupled with the large areal and season al variability of runoff commonly result in shortages. To mitigate the effects of periodic shortages and to allocate the finite supply among competing users, the State of Montana developed a legal process enabling State and Federal agencies and political subdivisions to reserve surface water for existing and future beneficial uses. Among the uses for which water may be reserved are instream fish and wild life preservation. To establish an instream-flow reservation for fish and wild life purposes, the Montana Department of Fish, Wildlife and Parks needs to determine the quantity of water needed and the quantity of water available to meet the need. The Department has determined the instreara-flow needs at several hundred stream sites in the Missouri River basin. The U.S. Geological Survey, in cooperation with the Montana Department of Fish, Wildlife and Parks, has conducted a study to determine the water availability at those sites.

Purpose and Scope

The objective of the study was to estimate mean monthly strearaflow and various points on the monthly mean flow-duration curve for each month (monthly mean streamflow that is exceeded 90, 80, 50, and 20 percent of the time for all years of record) at each identified site. The purposes of this report are to present the estimated monthly streamflow characteristics for the identified sites, to describe the methods used to make the estimates, and to discuss the reliability of the esti mates. To ensure that all estimates were representative of the same hydrologic conditions, a common base period of record (1937-86) was developed to determine monthly streamflow characteristics at all gaged sites used in the analyses. The procedure involved extension of the period of streamflow record at short-record gaged sites. The extended-streamflow records were used to develop monthly streamflow estimates at estimation sites where short-record gaged data were available.

Five methods were developed for estimating monthly streamflow characteristics at ungaged sites. The basin-characteristics method was based on the regression re lation between the monthly streamflow characteristics and various basin and cli matic variables. The channel-width method was similar to the first and was based on the regression relation between the monthly streamflow characteristics and channel width. The concurrent-measurement method required 7 to 12 measurements of

streamflow at the sites needing estimates and was based on the correlation of meas ured streamflow and concurrent daily mean streamflow at nearby-gaged sites. In a fourth method, the estimates from the individual methods were weighted in accordance with the variance and degree of independence of the individual methods. At a few sites, none of the foregoing estimating methods were used. Instead, information from similar gaged sites was transferred to these sites using drainage-area-ratio adjustments.

Streamflow Data

Three hundred and twelve sites in the Missouri River basin upstream from Fort Peck Lake were selected by the Montana Department of Fish, Wildlife and Parks for the determination of selected monthly streamflow characteristics. Of the 312 sites, 100 had gaged record, 139 had miscellaneous-measurement record, and 73 had no streamflow record. Estimates of monthly streamflow characteristics are shown in tables 4-9 at the back of the report.

In addition to the 100 sites for which gaged records were used to determine monthly streamflow characteristics, 54 gaged sites were used for correlation and record-extension purposes. Some of these 54 sites were located outside the upper Missouri River basin study area, but were considered to be hydrologically similar to sites within the study area. All of the sites described above were numbered con secutively in downstream order (366 sites); each location is shown in figure 1.

Of the 139 sites with miscellaneous measurements, 7 were measured 12 times during 1982-83, 1 was measured 12 times during 1986, 70 were measured 7 times during 1987, and 61 were measured 7 times during 1988. No streamflow measurements were made at 73 sites because these are either relatively inaccessible or were considered by the Department of Fish, Wildlife and Parks to be comparatively less important.

DEVELOPING A COMMON BASE PERIOD

Each streamflow-estimation method described in this report utilizes streamflow information from selected gaging stations in the study area (table 1; all tables are in the Supplemental Data section at the back of the report). The length of streamflow record at these gaging stations ranges from 2 to 81 years. To ensure that streamflow estimates would be unbiased and representative of a consistent hydrologic period, a monthly streamflow record-extension procedure was used to extend all short-term records to a common 1937-86 base period. This mixed-station procedure, described by Alley and Burns (1983), selects the best base station from all those available in a region to fill in each month of missing data at a site. Thus, several different base stations may be used for making estimates at a single site. The criterion for selection is to use the base station that results in the smallest standard error of prediction for that month. Only stations with streamflow record for a particular month and year were used to estimate missing streamflows at other sites for that month and year; previously estimated streamflows were not used to estimate any missing streamflows.

In addition to the capability of using more than one base station to extend a short-term record, the record-extension procedure also has the option of using a cyclic or noncyclic equation to fill in missing record. If the cyclic option is selected, an extension equation is computed for each month using only concurrent

Base modified from U.S. Geological Survey, 1965

Figure 1. Location of ungaged sites

50 MILES

50 KILOMETERS

EXPLANATION

118 SITE AND NUMBER

A Streamflow-gaging station needing estimates of monthly stream flow characteristics

A Streamflow-gaging station used for correlation

Ungaged site needing estimates of monthly streamflow characteristics

and of streamflow-gaging stations.

streamflows for that month. If the noncyclic option is selected, a single exten sion equation is computed using all concurrent streamflows. For two stations with 5 years of concurrent monthly streamflows, for example, the cyclic correlations would be developed separately for each month and would be based on five concurrent flows for each month. The noncyclic correlation would be based on 60 concurrent monthly flows, but the same correlation would be used for all months. The smallest standard error of prediction criterion also is used to select the cyclic or noncyclic option. No base station was used to fill in missing record at another sta tion unless the two stations had at least 5 concurrent monthly streamflows. The base stations with less than 5 years of record could thus be used only with the noncyclic option.

Most streamflow record-extension procedures are based on ordinary least-squares regression equations that are used to estimate individual missing values at stations with short-term records. Ordinary least-squares regression, unfortunately, commonly results in extended records with smaller variances than the unextended records. Techniques other than ordinary least-squares regression that can be used to esti mate missing values and that tend to preserve the variance of the unextended records include regression plus noise (Matalas and Jacobs, 1964; U.S. Army Corps of Engi neers, 1971) and two alternatives to regression described by Hirsch (1982), which he refers to as MOVE.l and MOVE.2 (Maintenance of Variance Extension, Types 1 and 2). The selected streamflow record-extension procedure has the capability of using any of these extension techniques, including ordinary least-squares regression.

For this study, the MOVE.l curve-fitting technique was used to estimate miss ing values. The MOVE.l technique is analogous to ordinary least-squares regression, except that ordinary regression minimizes the squared vertical deviations of the dependent variable from the regression line, whereas the MOVE.l technique minimizes the areas of the right triangles formed by the horizontal and vertical deviations from the regression line (Hirsch and Gilroy, 1984, p. 707).

To develop a common 1937-86 base period of record for all gaging stations used in the study, 154 stations were used as potential base stations. The earliest year of record considered was 1906, so that record lengths ranged from 2 to 81 years before the record extension. After record extension, all data prior to 1937 were excluded from the data base. All stations and available periods of record since 1906 used in the record-extension procedure are identified in table 2.

The extended streamflow records at 47 of the 154 gaged sites were subsequently used in regression analyses relating monthly streamflow characteristics to basin and climatic characteristics. The gaged sites selected for the regression analyses each had at least five years of actual streamflow record and were considered to be most representative of the ungaged sites needing estimates of monthly streamflow characteristics. Because the MOVE.l curve-fitting technique results in estimated flows that are perfectly correlated with the concurrent base-station flows, the possibility existed that the extended-flow records would have substantially larger inter-station correlations than the actual flow records. Inflated inter-station flow correlations would probably result in biased, and pi b ' ';- invalid, regression results.

To check whether the MOVE.l curve-fitting technique resulted in larger inter- station correlations, recorded monthly streamflows for each gage site used in the regression analyses were correlated in turn with concurrent monthly streamflows at every other gage site used in the regression analyses. This procedure resulted in

a 47 by 47 matrix of correlation coefficients for each month. The columns of cor relation coefficients for each station for each month were then averaged to produce an average correlation coefficient for each station for each month. This procedure was repeated for the complete extended-flow record (50 years of concurrent streamflow data at every gage site), and the average correlation coefficients computed for the actual record periods were subtracted from the average correlation coef ficients computed from the extended-record period. The final results are presented in table 3, where positive changes in correlation coefficients indicate that the average inter-station correlation increased when the record was extended. Most months show about as many negative changes in inter-station correlation as they do positive ones. Where the changes are positive, they generally are not large. The extended-flow records thus are considered to be unbiased and suitable for subse quent regression analysis.

ESTIMATES OF MONTHLY STREAMFLOV7 CHARACTERISTICS

All sites requiring estimates and the methods used to make the estimates of the monthly strearaflow characteristics are identified in table 1. At 139 sites, more than one method was used, and the final estimates were weighted averages, of the estimates from the individual methods. Final estimates of monthly streamflow characteristics at all estimation sites are presented in tables 4 to 9. Because estimates of mean annual streamflow are useful for many water-management purposes, estimates of mean annual streamflow also were developed for this report by multi plying each mean monthly streamflow estimate by the number of days in the month, summing the resultant 12 values, and dividing by 365. The estimated mean annual streamflows are presented in table 10.

Most of the estimation sites were on small, perennial streams (drainage areas less than 200 square miles) in forested, mountainous areas. Some sites were in plains area, but these sites were on larger streams with headwaters in the moun tains. Virtually all streams requiring monthly flow estimates were typical moun tainous streams with fairly stable base flows and runoff that resulted primarily from snowraelt.

Basin-Characteristics Method

One method for estimating monthly streamflow characteristics at the ungaged estimation sites used multiple-regression equations that related the monthly streamflow characteristics at 47 gaged sites to various basin and climatic variables. This basin-characteristics method has previously been used in Montana to estimate monthly streamflow characteristics (Boner and Buswell, 1970; Parrett and Cartier, 1989). For this analysis, the following basin and climatic characteristics were available for each gaged site and were used as independent variables in the regres sions :

A drainage area, in square miles;P mean annual precipitation on the basin, in inches;E mean basin elevation, in thousands of feet;

E6 percentage of basin above 6,000 feet elevation, plus 1;F percentage of drainage area covered by forest, plus 1;L main-channel length, in miles;S main-channel slope, in feet per mile;

TI mean basin minimum January temperature, in degrees Fahrenheit, plus 10;and

124 precipitation intensity for a storm of 24 hours duration having a 2-year recurrence interval, in inches.

The monthly streamflow data and the basin and climatic variables at the 47 gaged sites were converted to logarithms and used in a linear multiple-regression analy sis to derive estimating equations of the following form:

log Q - log a + bl log B + b2 log C + ... bn log N, (1)

where

Q (response variable) is the desired monthly streamflow characteristic in cubic feet per second (monthly mean streamflow exceeded 90, 80, 50, or 20 percent of the time for all years of record, or mean monthly streamflow);

a is the multiple-regression constant;

bl, b2, ... bn are the regression coefficients; and

B, C, ... N are values of the significant basin or climatic characteristics (explanatory variables).

The following nonlinear form of the regression equation results when antilogarithms of the terms are taken:

Q = a Bbl Cb2 ... Nbn . (2)

A computerized step-wise regression procedure, which added explanatory vari ables to the equation one at a time until all significant variables were included, was used in this study. An explanatory variable was considered significant if the partial-F test statistic was equal to or greater than 5.0. The computerized pro cedure also provided standard errors of estimate and coefficients of determination as measures of the regression reliability. In general, the larger the coefficient of determination and the smaller the standard error of estimate, the more reliable is the estimating equation.

In most of the regression equations, drainage area was the most significant explanatory variable and mean annual precipitation was the next most significant. For some monthly streamflow characteristics for some months, main-channel length was the most important explanatory variable, and mean basin elevation or percentage of forest cover was the next most significant. In these instances, however, using drainage area and mean annual precipitation rather than the two most significant explanatory variables resulted in estimating equations that were only slightly less reliable. Main-channel slope was determined to be significant for some monthly

streamflow characteristics for some months, but using just drainage area and mean annual precipitation in these instances also resulted in estimating equations that were almost as reliable as estimating equations using the three most significant explanatory variables.

To ensure that all estimates made using the regression equations would be con sistent, the final estimating equations used drainage area and mean annual precipi tation as the only explanatory variables for all monthly streamflow characteristics for all months. Results of the regression analysis using basin and climatic char acteristics, together with the coefficients of determination and standard errors associated with each estimating equation, are given in table 11. As indicated by the results, the coefficients of determination for the basin-characteristics method range from 0.56 to 0.89, and the standard errors range from 35 to 97 percent.

The equations given in table 11 were used to estimate monthly streamflow char acteristics at 179 sites where the basin-characteristics method was considered to be applicable, as indicated in table 1. Sites where the method was not considered applicable are: (1) sites where gains or losses in streamflow occur upstream, (2) springs, and (3) some sites on large rivers. At the sites where the method was used, drainage area was planimetered on U.S. Geological Survey topographic maps with 1:250,000 scale, and mean annual precipitation was determined from maps pre pared by the U.S. Soil Conservation Service (1981).

Channel-Width Method

The second method used to estimate monthly streamflow characteristics at the selected ungaged sites was also based on a regression analysis. In this method, the monthly streamflow characteristics at the 47 selected gaged sites were related to measured active-channel width rather than to basin characteristics. This channel-width method was previously used to estimate monthly streamflow character istics in western Montana (Parrett and Cartier, 1989).

The active-channel width has been described by Osterkamp and Hedman (1977, p. 256) as "...a short-term geomorphic feature subject to change by prevailing dis charges. The upper limit is defined by a break in the relatively steep bank slope of the active channel to a more gently sloping surface beyond the channel edge. The break in slope normally coincides with the lower limit of permanent vege tation. ..."

The monthly streamflow characteristics and measured active-channel widths at the 47 gaged sites were converted to logarithms, and simple linear regression was used to derive estimating equations of the following form:

log Q = log a + b log WAC , (3)

whereQ is a monthly streamflow characteristic as previously defined, a is the regression constant, b is the regression coefficient, and

active-channel width.

As before, the nonlinear form of equation 3, determined by taking antilogarithms, is:

Q = a WACb . (4)

The final regression equations derived using active-channel width and their coefficients of determination and standard errors of estimate are given in table 12. The coefficients of determination for the channel-width method range from 0.49 to 0.88, and the standard errors range from 36 to 103 percent. Active-channel width was measured at 138 ungaged sites needing estimates as indicated in table 1, and monthly streamflow characteristics at those sites were estimated using the equations given in table 12. The channel-width method was not used to estimate streamflow characteristics at sites where the active channel could not be identified or at sites where access was not feasible.

Concurrent-Measurement Method

The third method used to estimate monthly streamflow characteristics at ungaged sites was based on periodic measurements of streamflow made at selected ungaged sites. The measured streamflows at each ungaged site were correlated with concur rent streamflows at a selected similar gaged site, and the relation between the streamflows at the two sites was used to transfer the long-term monthly streamflow characteristic at the gaged site to the ungaged site. This concurrent measurement method was previously used to successfully estimate monthly streamflow characteris tics in western Montana (Parrett and Cartier, 1989).

For this study, the concurrent-measurement method used 7 measurements of streamflow at 131 of the ungaged estimation sites indicated in table 1. The meas urements were made from April through September so that measured flows would range from near-base flow to near-peak flow. At 8 additional sites, 12 streamflow meas urements (1 each month) were used for the concurrent-measurement method. The measured streamflows at each ungaged site were paired with concurrent streamflows at a selected gaged site, and a line was drawn through the logarithms of the data using the MOVE.l curve-fitting technique. Several examples of typical MOVE.l and ordinary least-squares regression lines are compared to measurement data at study sites (fig. 2). To estimate a long-term monthly streamflow characteristic at an ungaged site using the concurrent-measurement method, the long-term monthly streamflow characteristic at the gaged site is entered on the MOVE.l line, and the esti mated value is read on the y-axis as shown on figure 2.

As discussed by Parrett and Cartier (1989, p. 20), the relation between con current high flows may be different from the relation between concurrent low flows, or a difference in the timing of runoff at two sites may result in a concurrent streamflow plot that resembles a loop. In these cases, more complicated curve- fitting techniques would probably result in more accurate estimates of monthly streamflow characteristics than the MOVE.l curve-fitting technique. Based on an examination of concurrent streamflows from pairs of streamflow-gaging stations in the study area, however, it was concluded that, in most instances, the deviation from a single straight-line fit was not significant or the scatter about the line was great enough to mask any deviations. Accordingly, all estimates made using the concurrent-measurement method and the tests of reliability of the method were based on the MOVE.l curve-fitting technique.

10

zc/r

100

10

Estimated Q.90 for July at ungaged site = 23 cubic feet per second

\ n

O o

-i i i i i i r

Q.90 for July at gaged site : 98 cubic feet per second

O MEASURED STREAMFLOW WATER YEAR 1987

CURVE-FITTING TECHNIQUE (MAINTENANCE OF VARIANCE EXTENSION, TYPE 1) LINE

_ _ _ _ ORDINARY LEAST-SQUARES REGRESSION LINE"

10 100 1,000

STREAMFLOW FOR TAYLOR CREEK NEAR GRAYUNG, MONT. (SITE 161, STATION 06043000), IN CUBIC FEET PER SECOND

oa: o

LU

mm

100

10

O

Estimated QM for October at ungaged site = 15 cubic feet per second

-QM for October at gaged site = 72 cubic feet per second

O MEASURED STREAMFLOW WATER YEAR 1987

CURVE-FITTING TECHNIQUE (MAINTENANCE OF VARIANCE EXTENSION. TYPE 1) LINE

_ - _ - ORDINARY LEAST-SQUARES REGRESSION LINE"

10 100

STREAMFLOW FOR DEARBORN RIVER NEAR CRAIG, MONT. (SITE 228, STATION 06073500), IN CUBIC FEET PER SECOND

1,000

Figure 2. Lines for the curve-fitting technique and ordinary least-squares regression.

11

100

10

0.1

Estimated Q.90 for July at ungaged site = 2.0 cubic feet per second

O

MEASURED STREAMFLOW WATER YEAR 1987

CURVE-FITTING TECHNIQUE (MAINTENANCE OF VARIANCE EXTENSION, TYPE 1) LINE

ORDINARY LEAST-SQUARES REGRESSION LINE

Q.90 for July at gaged site = 22 cubic feet per second

10 100

STREAMFLOW FOR SHEEP CREEK NEAR WHITE SULPHUR SPRINGS, MONT. (SHE 239, STATION 06077000), IN CUBIC FEET PER SECOND

Figure 2. Lines for the curve-fitting technique and ordinary least-squares regression Continued

To estimate the reliability of the concurrent-measurement method, 20 of the gaged sites used in the basin-characteristics and channel-width regression analyses were considered to be ungaged sites for which the concurrent-measurement method was used to estimate monthly streamflow characteristics. Thus, a suitable gaged site was selected for comparison with each regression gaged site (herein called the pseudo-ungaged site), and seven concurrent daily mean streamflows occurring between April and September during a randomly selected year of concurrent record were cor related using the MOVE.l curve-fitting technique. The estimated monthly streamflow characteristics at each pseudo-ungaged site were then subtracted from the actual monthly streamflow characteristics determined from the extended flow record, and the standard deviations of the differences were calculated. The pseudo-ungaged sites, their respective correlating gaged sites, and the year of record selected for the test are presented for each station pair in table 13. The calculated standard deviations of the differences are equivalent to the standard errors of estimate determined by regression and thus are considered to be a comparable meas ure of reliability for the concurrent-measurement method. The standard errors for all three estimation methods can be compared in table 14. Standard error can beconverted from log units to percentage using the following equation: ^

fr

SEP 100 ( e ( 2 * 3026 SEL) _ i)0 (5)

12

where

SEP is standard error, in percent,e is the base of natural logarithms, andSEL is standard error, in base 10 log units.

When converted to percentages, the standard errors for the concurrent-measurement method range from 36 (0.15 log unit) to 111 (0.39 log unit).

Weighted-Average-Estimate Method

When different methods are available for estimating streamflow characteristics, it seems reasonable to assume that a weighted average of the individual estimates might provide a better answer than any of the individual estimates. Equations for weighting three estimates (E.J. Gilroy, U.S. Geological Survey, written commun. , 1987) are:

Z = al XI + a2 X2 + a3 X3, (6)

whereZ is the unbiased, weighted estimate of some streamflow characteristic; al, a2, a3 are weights which result in the minimum-variance, unbiased,

linear combination of XI, X2, and X3; and XI, X2, X3 are estimates of the streamflow characteristic from three

different methods.

Equations for the weights (E.J. Gilroy, U.S. Geological Survey, written commun., 1987) are:

al = [C (SE3 2 - S lj3 ) - B (SE32 - S 2j3 )]/ (A C - B2 ), (7)

a2 = [A (SE 3 2 - S 2j3 ) - B (SE 3 2 - S 1>3 )]/ (A C -B 2 ), (8)

a3 = 1 - al - a2, (9)

where0 = o to T o Jio Z oo *j J

SEj, SE2 , SE3 are the standard errors of the three different estimating methods;

Sj 2 = r l 2 (SEj * SE2 ) and is the covariance of methods 1 and 2;

^1 3 = r l 3 ^ E l * SE3 ) and is the covariance of methods 1 and 3;

^2 3 = r 2 3 (SE2 * SE3 ) and is the covariance of methods 2 and 3;

r,- i is the cross-correlation coefficient between the residuals from-L > J

estimating methods i and j;

A - SEj 2 + SE 3 2 - 2 Sj 3 ; and

B = SE3 + S l2 - S l3 - S23 .

13

The estimated standard error of the weighted estimate, SEZ , is determined from the following equation:

SEZ = [(al * SEj) 2 + (a2 * SE 2 ) 2 + (1 - al - a2) 2 SE32

+ 2 al ' a2 * Si 2 + 2 al (1 - al - a2) S l 3

+ 2 a2 (1 - al - a2) S 2>3 ] 0 * 5 , (10)

where all terms are as previously defined.

The above equations, and a similar set where only two methods were weighted, were used to calculate weights and standard errors for all combinations of the three estimating methods. Weighted estimates of monthly streamflow characteristics were made and used as final estimates at 139 sites as indicated in table 1. The standard errors used in the calculations for the basin-characteristics and channel-width methods are based on data from 47 sites, whereas the standard errors for the concurrent-measurement method are based on data from 20 sites. The resultant weights and standard errors for the combinations of methods are given in table 15. In general, the standard errors of the weighted estimates, which range from 24 to 63 percent when all three estimating methods are used, are significantly smaller than the standard errors of the individual estimates. Thus, the weighted estimates are generally considered to be more reliable than any of the individual esti mates.

Drainage-Area-Ratio Adjustment Method

Seven of the estimation sites were located fairly close to gaged sites or other estimation sites on the same stream. In each of these instances, the esti mated monthly streamflow characteristics at the nearby gaged site or other estima tion site were transferred to the site of interest by multiplying the estimated monthly streamflow characteristics by the ratio of the drainage area at the site of interest to the drainage area of the nearby site. This drainage-area-ratio adjustment method (table 1) is considered to be applicable only when the drainage areas of the two sites are not substantially different, and when diversions between the estimation site and the nearby gaged or estimation site are not substantial. Standard errors were not determined for the drainage-area-ratio adjustment method because of the small number of sites where the method was applicable.

RELIABILITY OF ESTIMATES

Estimates of monthly streamflow characteristics for sites with streamflow- gaging stations (column 3, table 1) are considered to be the most reliable. Indeed, for those gaged sites where the period of actual streamflow record includes the 1937-86 base period, the estimates of monthly streamflow characteristics are based entirely on recorded streamflows and are considered to be perfectly reliable (zero error). For those gaged sites where the strearaflow record was extended to the 1937-86 base period, the estimates of monthly streamflow characteristics are sub ject to the errors of the record extension. In general, the shorter the actual streamflow record and the longer the period of extended record, the less reliable are the estimates of monthly streamflow characteristics.

14

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To estimate the error when fewer than 50 years of actual flow record were available (for example 35 years), each test site successively had 35 years of record randomly selected, and all remaining years were removed from the record. The MOVE.l record-extension procedure was then applied, using the complete data base of 154 stations previously used in the actual record-extension analysis, to fill in the missing years of record at the test site with only 35 years of record. The record-extension procedure was repeated for each station in turn. Adjusting only one of the 20 test sites at a time ensured that the complete streamflow record at each of the other 19 sites was available for filling in missing record at the sta tion being adjusted. The monthly streamflow characteristics at each site then were recomputed from the extended record and were subtracted from the monthly streamflow characteristics computed from the original period of record. For each monthly streamflow characteristic, the standard deviation of the differences, analogous to the standard errors previously described for the estimation methods, was the error criterion for the record length (35 years in this example) being tested.

This procedure was repeated where the record available at each test site was 5, 15, and 25 years. The estimated standard errors for each monthly streamflow characteristic for each record length are given in table 17. The standard errors had the following ranges: 9 (0.04 log unit) to 54 (0.22 log unit) percent for 5 years of record, 5 (0.02 log unit) to 33 (0.14 log unit) percent for 15 years of record, 2 (0.01 log unit) to 31 (0.13 log unit) percent for 25 years of record, and 2 (0.01 log unit) to 23 (0.10 log unit) percent for 35 years of record. The average standard errors for all months, expressed in percentages, for selected monthly streamflow characteristics for the various lengths of record are shown in figure 4. The average standard error decreases substantially as the record length increases from 5 to 15 years and generally decreases slightly as the record length increases from 15 to 50 years. The results in table 17 can be used to assess the relative reliability of the estimates of monthly streamflow characteristics for each gaged estimation site identified in tables 1 and 10.

For estimates made at ungaged sites, weighted-average estimates based on three methods are generally considered to be the most reliable. If only one estimation method was used, the concurrent-measurement method generally provides more reli able estimates than any of the other individual estimating methods. Concurrent- measurement estimates based on more than seven measurements were no more reliable than those based on seven measurements, primarily because the choices for suitable correlating gaged sites were more limited for the ungaged sites with the larger number of measurements than for the ungaged sites with seven measurements.

The reader needs to be aware that the standard errors of estimate previously developed and described for the various methods did not account for errors in the monthly streamflow characteristics resulting from the record-extension procedure. The reported standard errors for the streamflow-estimation methods thus are proba bly smaller than the true errors. Nevertheless, a comparison of standard errors from table 17 with those from tables 14 and 15 indicates that the errors due to record extension are generally smaller than those due to the streamflow-estimation methods.

The reliability of the monthly streamflow estimates made using the drainage- area-ratio adjustment was not rigorously tested because only a few streams have gaging station pairs that are unaffected by substantial diversions. On the basis of experience gained during this study, the estimates made using drainage-area-

16

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10 15 20 25 30 35 40

NUMBER OF YEARS OF RECORD45 50

Figure 4. Average standard errors of estimated monthly streamflow characteristics for various record lengths. Standard error for sites with 50 years of record is assumed to be zero.

ratio adjustment are thought to be at least as reliable as those made using basin characteristics.

SUMMARY AND CONCLUSIONS

Monthly mean streamflow that exceeded 90, 80, 50, and 20 percent of the time for all years and mean monthly streamflow for 1937-86 were estimated and are pre sented in tabular form for 312 sites in the upper Missouri River basin in Montana. Of the 312 sites, 100 had gaged record, 139 had miscellaneous-measurement record, and 73 had no streamflow record. Mean annual streamflow was also estimated for the 312 sites by multiplying each estimate of mean monthly streamflow by the number of days in the month, summing, and dividing by 365.

A streamflow record-extension procedure, based on the MOVE.l curve-fitting technique, was used as necessary to extend streamflow records to the 1937-86 base period. Results from the record-extension procedure for 47 gaged sites subsequent ly used in the development of regression equations for estimating monthly streamflow characteristics at ungaged sites were checked to ensure that inter-station correlations did not increase.

17

Five methods were used to make the estimates at ungaged sites. Regression equations based on basin characteristics were derived from the 1937-86 record at 47 gaged sites. The explanatory variables used in the equations for all monthly streamflow characteristics for all months were drainage area and mean annual pre cipitation. The coefficients of determination ranged from 0.56 to 0.89, and the standard errors of estimate ranged from 35 to 97 percent. The basin-characteristics equations were used to estimate monthly streamflow characteristics at 179 of the 312 sites.

Regression equations based on active-channel width were also derived for the same 47 gaged sites used in the basin-characteristics method. Coefficients of determination in this case ranged from 0.49 to 0.88, and the standard errors of estimate ranged from 36 to 103 percent. The channel-width equations were used to estimate monthly streamflow characteristics at 138 of the 312 sites.

A concurrent-measurement method, using 7 to 12 concurrent measurements of streamflow at ungaged sites and nearby gaged sites, was developed based on the MOVE.l curve-fitting technique. Twenty pairs of gaged sites were used to test the reliability of the concurrent-measurement method. Based on the test results, the standard errors of the concurrent-measurement method were estimated to range from 31 to 111 percent. The concurrent-measurement method was used to estimate monthly streamflow characteristics at the 139 sites with miscellaneous-measurement record.

A method was developed for weighting two or more estimates made using the basin-characteristics method, the channel-width method, and the concurrent- measurement method. The standard errors of the weighted-average estimates when all three estimating methods were used ranged from 24 to 63 percent. Weighted- average estimates of monthly streamflow characteristics were made and used as final estimates at 139 of the 312 sites.

A drainage-area-ratio adjustment method was developed for estimating monthly streamflow characteristics at ungaged sites located close to gaged sites or other estimation sites on the same stream. Standard errors were not determined for this method because of the small number of sites where the method was applicable. This method was used to estimate monthly streamflow characteristics at 7 of the 312 sites .

Estimates of monthly streamflow characteristics from gaged records were con sidered to be the most reliable, and estimates at sites with actual flow record from 1937-86 were considered to be completely reliable (zero error). Twenty gaged sites were used to test the reliability of the record-extension procedure when 5, 15, 25, and 35 years of record were available for 1937-86. The standard errors for the worst case, where only 5 years of record were available, ranged from 9 to 54 per cent. For 35 years of record, the standard errors ranged from 2 to 23 percent. The standard errors decreased slightly as the length of record increased from 15 to 35 years.

Weighted-average estimates were considered to be the most reliable estimates made at ungaged sites. For ungaged sites where only one estimation method was used, the concurrent-measurement method generally provided the most reliable estimates. The reliability of the drainage-area-ratio adjustment method was not tested, but, based on experience with the method, the estimates are thought to be at least as reliable as those made using basin characteristics.

18

REFERENCES CITED

Alley, W.M., and Burns, A.W., 1983, Mixed-station extension of monthly streamflow records: Journal of Hydraulic Engineering, v. 109, no. 10, p. 1272-1284.

Boner, F.C., and Buswell, G.W., 1970, A proposed streamflow data program for Mon tana: U.S. Geological Survey Open-File Report 70-33, 96 p.

Hackett, O.M., Visher, F.N., McMurtrey, R.G., and Steinhilber, W.L., 1960, Geology and ground-water resources of the Gallatin Valley, Gallatin County, Montana: U.S. Geological Survey Water-Supply Paper 1482, 282 p.

Hirsch, R.M., 1982, A comparison of four streamflow record extension techniques: Water Resources Research, v. 18, no. 4, p. 1081-1088.

Hirsch, R.M., and Gilroy, E. J., 1984. Methods of fitting a straight line to data Examples in water resources: Water Resources Bulletin, v. 20, no. 5, p. 705-711.

Matalas, N.C., and Jacobs, B.A., 1964, A correlation procedure for augmenting hydrologic data: U.S. Geological Survey Professional Paper 434-E, 7 p.

Osterkamp, W.R., and Hedman, E.R., 1977, Variation of width and discharge for natural high-gradient stream channels: Water Resources Research, v. 13, no. 2, p. 256-258.

Parrett, Charles, and Cartier, K.D., 1989, Methods for estimating monthly streamflow characteristics in western Montana: U.S. Geological Survey Open-File Report 89-40, 52 p .

U.S. Army Corps of Engineers, 1971, HEC-4 monthly streamflow simulation: Hydrologic Engineering Center, 113 p.

U.S. Soil Conservation Service, 1981, Average annual precipitation, Montana, based on 1941-1970 base period: Bozeman, Mont., 13 p.

U.S. Water Resources Council, 1981, Guidelines for determining floodflow frequency: Bulletin 17B, 28 p.

19

SUPPLEMENTAL DATA

20

Table 1. --Sites and methods used for estimating monthly streamflow characteristics

[--, -, not applicable]

Method for estimating streamflow

SiteNo. Stream name

1 Hellroaring Creek near Lakeview2 Corral Creek near Lakeview3 Antelope Creek near Lakeview4 Red Rock Creek near Lakeview5 Tom Creek near Lakeview

6 Narrows Creek at mouth, near Lakeview7 Odell Creek near Lakeview8 Jones Creek near Lakeview9 Red Rock River near Kennedy Ranch,

near Lakeview10 Peet Creek at county road, near Lakeview

11 Long Creek near Lakeview12 East Fork Clover Creek at mouth, near Monida13 Red Rock River below Lima Reservoir,

near Monida14 Cabin Creek above Simpson Creek, near Lima15 Indian Creek above Simpson Creek, near Lima

16 Simpson Creek above Indian Creek, near Lima17 Deadman Creek near Dell18 Big Sheep Creek below Muddy Creek, near Dell19 Red Rock River at Red Rock20 Black Canyon Creek near Grant

21 Shennon Creek near mouth, near Grant22 Frying Pan Creek near Grant23 Trapper Creek at mouth, near Grant24 Bear Creek near Grant25 Bloody Dick Creek near Grant

26 Horse Prairie Creek near Grant27 Rape Creek above reservoir, near Grant28 Painter Creek near Grant29 Browns Canyon Creek near Grant30 Medicine Lodge Creek near Grant

32 Pole Creek near mouth, near Polaris33 Reservoir Creek at mouth, near Polaris34 East Fork Dyce Creek at mouth, near Polaris35 West Fork Dyce Creek at mouth, near Polaris36 Grasshopper Creek near Dillon

37 Beaverhead River at Barretts38 East Fork Blacktail Creek near Dillon39 West Fork Blacktail Creek near Dillon40 Blacktail Deer Creek near Dillon41 Beaverhead River near Dillon

42 Beaverhead River near Twin Bridges43 Corral Creek at mouth, near Alder44 Coal Creek at mouth, near Alder45 Ruby River above the forks, near Alder46 East Fork Ruby River at mouth, near Alder

47 West Fork Ruby River at mouth, near Alder48 Cottonwood Creek at mouth, near Alder49 Warm Springs Creek at mouth, near Alder50 North Fork Greenhorn Creek at mouth,

near Alder51 Ruby River above reservoir, near Alder

52 Mill Creek at Forest Service boundary,near Sheridan

53 Wisconsin Creek at Forest Service boundary,

Stream-flow-

gagingstation

No.

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06011000

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06012500

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0601350006014500

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06015500

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0601750006018000

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06019500

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width

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Con currentmeasurement

XXXXX

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X-_

--

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_

X-XX

_-_-X

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_-_-

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X

Weighted-

averageestimate

XXXXX

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XX--X

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-near Sheridan

54 Ruby River near Twin Bridges55 Big Hole River near Jackson56 Andrus Creek near mouth, near Jackson

06023000 X 06023500 X

21

Table 1.--Sites and methods used for estimating monthly streamflow cha racteris tics--Continued

Site No. Stream name

Stream-f low-

gaging station

No. Gage


Basin char-ac- Chan- teris- nel tics width

Con- Drain- cur- age- rent Weight- area- meas- ed- ratio ure- average adjust ment estimate ment

57 Fox Creek at mouth, near Jackson X58 Governor Creek near Jackson X X X2 X59 Warm Springs Creek at Jackson -- - X X X 2 X60 Miner Creek near Jackson 06024000 X -61 Big Lake Creek near mouth, near Wisdom -- - X

62 Steel Creek above Francis Creek, near Wisdom -- - X X X X63 Francis Creek at mouth, near Wisdom -- - X - X X64 Steel Creek near mouth, near Wisdom -- - X X X X65 Swamp Creek near mouth, near Wisdom X X X 2 X66 Joseph Creek at mouth, near Wisdom -- - X

67 Trail Creek near Wisdom 06024500 X - - - -68 Ruby Creek at mouth, near Wisdom -- - X X X X69 Tie Creek at Forest Service boundary, X

near Widsom70 Johnson Creek near Wisdom X X X 2 X71 Mussigbrod Creek near Wisdom X X X2 X

72 North Fork Big Hole River near mouth, X X X2 X near Wisdom

73 Big Hole River below North Fork, near Wisdom --74 Pintlar Creek near Forest Service boundary, -- - X X X X

near Wisdom75 Big Hole River below Mudd Creek, near Wisdom -- - X2 -76 Fishtrap Creek at mouth, near Wise River X X X X

77 Lamarche Creek near Wise River X X X X78 Seymour Creek near Wise River X79 Tenmile Creek at mouth, near Wise River X80 Sevenmile Creek at mouth, near Wise River X81 Corral Creek at mouth, near Wise River X

82 Twelvemile Creek at mouth, near Wise River X83 Sullivan Creek at mouth, near Wise River X84 Oregon Creek near mouth, near Wise River X85 California Creek above American Creek, X

near Wise River86 American Creek at mouth, near Wise River X

87 Sixmile Creek at mouth, near Wise River X88 French Creek near mouth, near Wise River X89 Deep Creek near Wise River X X X X90 Bear Creek near Wise River X X X X91 Bryant Creek at mouth, near Wise River - X

92 Big Hole River near Wise River 06024580 X - -93 Johnson Creek at mouth, near Wise River X94 Meadow Creek near Wise River X95 Jacobson Creek at mouth, near Wise River X96 Mono Creek at mouth, near Wise River X

97 Wyman Creek at mouth, near Wise River -- - X98 Lacy Creek at mouth, near Wise River X99 Gold Creek at mouth, near Wise River X

100 Pattengail Creek at mouth, near Wise River X101 Sheep Creek at mouth, near Wise River X

102 Wise River near Wise River 06024590 X - - - -103 Adson Creek at mouth, near Wise River -- - X104 Jerry Creek near Wise River X X X X105 Divide Creek at Divide X X X X106 Canyon Creek near Divide X X X X

107 Moose Creek near Divide X X X X108 Trapper Creek near Melrose X X X X109 Camp Creek at Melrose -- - X X X X110 Big Hole River near Melrose 06025500 X - - - -111 Willow Creek near Glen 06025800 X

22

Table 1.--Sifces amd methods ased for estimating monthly streamflow characteristics--Continued



Con- Drain- cur- age- rent Weight- area-

ac- Chan- meas- ed- ratio teris- nel ure- average adjust-

Stream- Basin flow- char-

gaging

No. Gage tics width ment estimate

112 Birch Creek near Glen 06026000 X - - - -113 Hells Canyon Creek near Twin Bridges -- - X X X X114 Jefferson River near Twin Bridges 06026500 X - - - -115 Whitetail Creek near Whitehall 06029000 X - - - -117 Boulder River above High Ore Creek, - -

near Basin

118 Boulder River near Boulder 06033000 X - - - -119 Little Boulder River near Boulder X 3120 Boulder River above Cabin Gulch, --

near Boulder121 Boulder River near Cardwell -- - X 1* -122 South Boulder River near Jefferson Island 06034000 X - - - -

123 Jefferson River at Sappington 06034500 X124 South Willow Creek near Pony -- - X X X X125 North Willow Creek at Pony -- - X X X X126 Willow Creek near Harrison 06035000 X127 Norwegian Creek near Harrison 06035500 X - - - -

129 Jefferson River near Three Forks 06036650 X130 Madison River near West Yellowstone 06037500 X131 Duck Creek near West Yellowstone -- - X X X X132 Cougar Creek near West Yellowstone -- - X X X X133 Grayling Creek near West Yellowstone X X X X

134 Red Canyon Creek near West Yellowstone -- - X X X X135 South Fork Madison River near -- - X

West Yellowstone136 Watkins Creek near West Yellowstone X X X X137 Trapper Creek near West Yellowstone -- - X X X X138 Madison River below Hebgen Lake, near 06038500 X - - - -

Grayling

139 Cabin Creek near West Yellowstone -- - X X X X140 Beaver Creek near West Yellowstone -- - X X X X141 Elk River at mouth, near Cameron -- - X142 Soap Creek at mouth, near Cameron -- - X143 Antelope Creek at mouth, near Cameron X

144 West Fork Madison River near Cameron 06039200 X - - - -145 Squaw Creek near Cameron -- - X X X X146 Standard Creek near Cameron - X X X X147 Ruby Creek near Cameron -- - X X X X148 Indian Creek near Cameron - X X X X

149 Madison River near Cameron 06040000 X150 Blaine Spring Creek near Cameron 06040010 X 5 -151 O'Dell Creek near Ennis -- - X152 Jack Creek near Ennis 06040300 X153 Moore Creek at Ennis -- - X X X X

154 North Fork Meadow Creek at Forest Service -- - X X X X boundary, near Ennis

155 North Fork Meadow Creek at Highway 287, -- X X X near Ennis

156 Madison River below Ennis Lake, near 06041000 X McAllister

157 Hot Springs Creek near Norris X X X X158 Cherry Creek near Norrts -- - X X X X

159 Madison River near Three Forks 06042500 X160 Cache Creek at mouth, near West Yellowstone X161 Taylor Creek near Grayling 06043000 X - - - -162 Porcupine Creek near Gallatin Gateway -- - X X X X163 Gallatin River above West Fork, near Big Sky --

23

Table 1.--Sites and methods used for estimating monthly streamflow characterist ics--Continued


SiteNo. Stream name

164 South Fork West Fork Gallatin River nearGallatin Gateway

165 Middle Fork West Fork Gallatin River nearGallatin Gateway

166 West Fork Gallatin River nearGallatin Gateway

167 Squaw Creek near Gallatin Gateway168 Hellroaring Creek near Gallatin Gateway

169 South Fork Spanish Creek nearGallatin Gateway

170 Spanish Creek near Gallatin Gateway171 Gallatin River near Gallatin Gateway172 Big Bear Creek near Gallatin Gateway173 South Cottonwood Creek near

Gallatin Gateway

1 74 Baker Creek near Manhattan175 Rocky Creek near Bozeman176 Bear Canyon Creek near Bozeman177 Sourdough Creek near Bozeman178 East Gallatin River at Bozeman

179 Bridger Creek near Bozeman180 East Gallatin River near Belgrade181 East Fork Hyalite Creek near Bozeman182 West Fork Hyalite Creek near Bozeman183 Hyalite Creek at Hyalite Ranger Station,

near Bozeman

184 Hyalite Creek above Interstate 90,near Bozeman

185 Thompson Creek near Belgrade186 Ben Hart Creek near Belgrade187 Reese Creek near Belgrade188 East Gallatin River near Manhattan

189 Gallatin River near Logan190 Sixteenmile Creek near Ringling191 Sixteenmile Creek near Maudlow192 Sixteenmile Creek near Toston193 Missouri River near Toston

1 94 Crow Creek near Radersburg195 Dry Creek near Toston196 Deep Creek below North Fork,

near Townsend197 Duck Creek near Townsend198 Confederate Gulch near Winston

1 99 Beaver Creek near Winston200 Avalanche Gulch near Winston201 Spokane Creek near East Helena202 McGuire Creek at county road, near

Stream-f low-

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_

-XX 6X 6

X 6X 6X 6X 6X

XX 6X 7X 7X

_

X 6X 6X 6-

XX--X

X--

--

X8---


X

X

X

XX

X

X---

_----

_----

_

---X

_--X-

_

XX

XX

_

XX-

Channel

width

X

X

X

XX

X

X-_.

_----

_----

X

---X

_--X-

_

XX

XX

_

XX-

Con currentmeasurement

X

X

X

XX

X

X_-_

_----

_----

X

---X

_-_X-

_XX

XX

_

XXX

Weighted-

averageestimate

X

X

X

XX

X

X___

_----

__---

X

---X

___X-

_XX

XX

_XX-

Drain- age-area-

ratioadjustment

_

_

_-

_

-___

___--

__-_-

_

----

__X_-

_--

_-

___-

East Helena203 Trout Creek at mouth, near East Helena

204 Prickly Pear Creek near Clancy 06061500 X205 Prickly Pear Creek at mouth,

near East Helena206 Tenmile Creek near Rimini 06062500 X207 Tenmile Creek near Helena 06063000 X208 Sevenmile Creek near mouth, near Helena

209 Tenmile Creek at mouth, near East Helena210 Silver Creek at Interstate 15, near Helena211 Beaver Creek at mouth, near East Helena -- X 8212 Elkhorn Creek near mouth, near Wolf Creek213 Willow Creek below Elkhorn Creek, near

Wolf Creek

24

Table 1.--Sites and methods used for estimating monthly streamflov characteristics--Continued


SiteNo. Stream name

214 Cottonwood Creek above Beartooth Ranch,near Wolf Creek

217 Virginia Creek at mouth, near Canyon Creek218 Canyon Creek below Cottonwood Creek, near

Canyon Creek219 Little Prickly Pear Creek near Canyon Creek220 Lyons Creek near Wolf Creek

221 Wolf Creek at mouth, at Wolf Creek222 Little Prickly Pear Creek near Wolf Creek223 Wegner Creek near Craig224 Stickney Creek near Craig226 Middle Fork Dearborn River at Highway 200,

near Wolf Creek

227 South Fork Dearborn River at Highway 434,near Wolf Creek

228 Dearborn River near Craig229 Flat Creek above Slew Creek, near Craig230 Sheep Creek at mouth, near Cascade232 North Fork Smith River at Highway 89, near

White Sulphur Springs

233 South Fork Smith River at mouth, nearWhite Sulphur Springs

234 Smith River below forks, nearWhite Sulphur Springs

235 Big Birch Creek at mouth, nearWhite Sulphur Springs

236 Newlan Creek below Charcoal Gulch, nearWhite Sulphur Springs

237 Camas Creek near mouth, nearWhite Sulphur Springs

238 Smith River near Fort Logan239 Sheep Creek near White Sulphur Springs240 Sheep Creek near mouth, near

White Sulphur Springs241 Eagle Creek near mouth, near

White Sulphur Springs242 Rock Creek River below Buffalo Canyon, near

White Sulphur Springs

Stream-f low-

gagingstation

No. Gage

__

06071000 X--

__06071300 X

______

__

06073500 X_-____

__

__

__

__

__

06076690 X06077000 X

__

__

__


X

XX

-X

X-XXX

X

-XX-

X

-

X

X

X

_-X

X

X

Channel

width

X

XX

-X

X-X-X

X

-XXX

X

X

X

X

X

_-X

X

X

Concurrentmeasurement

X

XX

-X

X---X

X

-XXX

X

X

X

X

X

_-X

X

X

Weighted-

averageestimate

X

XX

-X

X-X-X

X

-XXX

X

X

X

X

X

_-X

X

X

Drain-age-area-

ratioadjustment

--

--

_----

_

----

_

-

-

-

-

_--

-

-

243 Tenderfoot Creek below South Fork, near White Sulphur Springs

244 Smith River near Eden245 Hound Creek near mouth, near Cascade246 Missouri River near Ulm247 North Fork Sun River near Augusta

248 Sun River near Augusta249 Sun River below diversion dam, near

Augusta250 Willow Creek near Anderson Lake,

near Augusta251 North Fork Willow Creek below

Cutrock Creek, near Augusta254 Smith Creek near Augusta

255 Ford Creek near Augusta256 Elk Creek near Augusta257 Sun River at Simms260 Missouri River near Great Falls261 Dry Fork at mouth, at Monarch

06077500

0607820006078500

0608000006080900

06082500

06083500060845000608580006090300

25

Table 1.--Sites and methods used for estimating monthly steeamflow eharaofeeri«6ic9~-Contlnued

Method _ for e$ tlmatt ag_..e.1 reamflqw^

Con- Drain- Stream- Basin cur- ape- flow- char- rent Weight- area-

gaging ae- Chan- meas- ed- ratioSite No. Stream name

262

263264

265266

Tillinghast Creek above Joice Creek,near Monarch

Pilgrim Creek at mouth, near MonarchLogging Creek at Logging Creek

Campground, near MonarchBelt Creek near MonarchBig Otter Creek above Never Sweat Creek,

near Raynesford

station teris- No. Gage tics

X

- XX

06090500 X....

nel width

X

XX

-X

ure- average tn-ent estimate

X

.X

-X

X

XX

-X

adjust ment

.

--

--

267 Belt Creek near Portage 06090610 X268 Highwood Creek below Smith Creek, ... X X X I

near Highwood269 Missouri River at Fort Benton 0609080O X270 Shonkin Creek below Bishop Creek, - X X X X

near Highwood271 South Fork Two Medicine River X X X X

near East Glacier

273 South Fork Badger Creek near Browning X274 North Fork Badger Creek near Browning X278 Birch Creek at Swift Dam, near Valier 06094500 X279 South Fork Dupuyer Creek near Dupuyer X280 North Fork Dupuyer Creek near Dupuyer -- - X

281 Dupuyer Creek below Scoffin Creek, - X X X X near Dupuyer

282 Birch Creek near Valier 06098100 X - - - -283 Cut Bank Creek near Browning 06098500 X284 Cut Bank Creek at Cut Bank 06099000 X - ...285 Marias River at Sullivan Bridge, - - X

near Cut Bank

286 Marias River near Shelby 06099500 X287 Marias River at "F" Bridge, above .. _ _

Tiber Reservoir, near Shelby288 Marias River near Loma 06102050 X290 Teton River near Strabane - - X291 McDonald Creek near Strabane - - - X

292 North Fork Deep Creek near Choteau - X293 South Fork Deep Creek near Choteau - X294 Deep Creek near Choteau .... . x295 Teton River near Dutton 06108000 X - - - -296 Missouri River at Virgelle 06109500 X

297 Lost Creek at mouth, near Utica X298 Yogo Creek at mouth, near Utica X X X X299 Middle Fork Judith River near Utica 06109780 X301 South Fork Judith River at Indian Hill .... x X X

Campground, near Utica 303 Judith River above Courtneys Creek, - - X X X

at Utica

306 East Fork Big Spring Creek at mouth, X X X X near Lewistown

307 Big Spring Creek above Cottonwood Creek, .... . x near Hanover

309 Cottonwood Creek at Highway 200, near .... x X X Lewistown

310 Beaver Creek at county road, near Lewistown X X X X311 Big Spring Creek at mouth, near Lewistown -- - X

312 Warm Springs Creek above Meadow Creek, .... . x near Hilger

313 Judith River near Winifred 06113500 X315 Cow Creek below forks, near Cleveland X X - X316 Missouri River near Landusky 06115200 X317 North Fork Musselshell River 06115500 X

near Delpine

26

Table 1.--Sites and methods used for estimating monthly streamflow characteristics--Continued


SiteNo.

318 Checkerboard319 Spring Creek

Stream name

Creek near Checkerboardbelow Whitetail Creek, near

Stream-f low-

gagingstation

No.

._--

Basinchar-ac-teris-

Gage tics

XX

Channel

width

XX

Concurrentmeasurement

XX

Weighted-

averageestimate

XX

Drain-age-area-

ratioadjustment

.-

Checkerboard320 North Fork Musselshell River near mouth,

near Martinsdale321 Alabaugh Creek at mouth, near Lennep322 Cottonwood Creek below Loco Creek,

near Martinsdale

323 South Fork Musselshell River above Martinsdale

324 Big Elk Creek at mouth, at Twodot325 Musselshell River at Harlowton326 American Fork near Harlowton330 Careless Creek below Little Careless Creek,

near Hedgesville

331 Swimming Woman Creek below Dry Coulee,near Franklin

333 Musselshell River near Roundup 335 Flatwillow Creek below the forks,

near Grass Range338 Musselshell River near Mosby339 Big Dry Creek above Little Dry Creek,

near Van Norman

340 Little Dry Creek near Van Norman341 Big Dry Creek near Van Norman

Totals

06118500 X

06120000 X06120500 X06121000 X

06126500 X

06130500 X

06131000 X

100 179 138 139 139

Monthly streamflow characteristics based on record after construction of Clark Canyon Reservoir.2 Based on 12 streamflow measurements made in water years 1982-83.3 U.S. Soil Conservation Service gage."*Based on 12 streamflow measurements made in water year 1986.5 Gaged record available for 1 year (water years 1971-72).6Estimated monthly flows available for water years 1952-54.7 Montana Department of Natural Resources and Conservation gage.8 U.S. Forest Service gage.

27

Table 2. --Streamflow-gaging stations used for record-extension analysis

Site No.

9

13

18

1926

3136374041

4251

545560

6792

102110111

112114115116

119

118122

123126127

128129130138

144

149150152156

159

161171172173

174

175176177178179

180182181183

185

Stream name

Red Rock River near Kennedy Ranch,near Lakeview

Red Rock River below Lima Reservoir,near Monida

Big Sheep Creek below Muddy Creek,near Dell

Red Rock River at Red RockHorse Prairie Creek near Grant

Beaverhead River near GrantGrasshopper Creek near DillonBeaverhead River at BarrettsBlacktail Deer Creek near DillonBeaverhead River near Dillon

Beaverhead River near Twin BridgesRuby River above reservoir, nearAlder

Ruby River near Twin BridgesBig Hole River near JacksonMiner Creek near Jackson

Trail Creek near WisdomBig Hole River near Wise RiverWise River near Wise RiverBig Hole River near MelroseWillow Creek near Glen

Birch Creek near GlenJefferson River near Twin BridgesWhitetail Creek near WhitehallBoulder River above Rock Creek, near

BasinLittle Boulder River near Boulder

Boulder River near BoulderSouth Boulder River near Jefferson

IslandJefferson River at SappingtonWillow Creek near HarrisonNorwegian Creek near Harrison

Willow Creek near Willow CreekJefferson River near Three ForksMadison River near West YellowstoneMadison River below Hebgen Lake,

near GraylingWest Fork Madison River near Cameron

Madison River near CameronBlaine Spring Creek near CameronJack Creek near EnnisMadison River below Ennis Lake,

near McAllisterMadison River near Three Forks

Taylor Creek near GraylingGallatin River near Gallatin GatewayBig Bear Creek near Gallatin GatewaySouth Cottonwood Creek near Gallatin

GatewayBaker Creek near Manhattan

Rocky Creek near BozemanBear Canyon Creek near BozemanSourdough Creek near BozemanEast Gallatin River at BozemanBridger Creek near Bozeman

East Gallatin River near BelgradeWest Fork Hyalite Creek near BozemanEast Fork Hyalite Creek near BozemanHyalite Creek at Hyalite Ranger

Station, near BozemanThompson Creek near Belgrade

Station No.

0601 1000

06012500

06013500

0601450006015000

0601540006015500060160000601750006018000

0601850006019500

060230000602350006024000

0602450006024580060245900602550006025800

06026000060265000602900006030500

06032999

0603300006034000

060345000603500006035500

06036500060366500603750006038500

06039200

06040000060400100604030006041000

06042500

06043000060435000604409906044500

06045099

0604650006047000060475000604800006048500

06049000060498990604999906050000

06050599

Period of record since 1906 (water year)

1936-67

191 1-1 9; 1925 -69; 1974-82; 1985-86

1936;1946-53;1961-80

1974-831928;1932;1935-36;1946-53

1963-841921-33;1946-58;1960-611908-861946-661951-52;1963-84

1935-861938-86

1940-43;1946-65;1979-811948-541948-54

1948-54;1967-721979-811972-851924-861962-66

1946-53;1955-771940-43:1958-721950-681936;1946-58

1963-68;1974-80;1982

1929-73:1985-861926-33

1938-701938-851938-43;1946-51

1919-33:1946-571978-861913-73:1983-861939-86

1965-67

1952-63;1968-711971-721973-851939-86

1929-32;1942-50

1946-57:1966-671930-82;1985-861951-541951-54

1951-54

1951-541951-541951-541939-611946-72

1951-541975-861975-861934-86

1951-54

28

Table 4. --Estimated monthly streamflow characteristics for October and November

[Q.XX, monthly mean streamflow for specified month exceeded XX percent of the years, in cubic feet per second; QM, mean monthly streamflow for specified month, in cubic feet per second]

OctoberSite No. Stream name

1

2345

6

789

10

1 112

13

14

15

16

1718

1920

21

2223

2425

26

27' 28

2930

32

33

34

35

36

3738

39

40

41

Hellroaring Creeknear Lakeview

Corral Creek near LakeviewAntelope Creek near LakeviewRed Rock Creek near LakeviewTom Creek near Lakeview

Narrows Creek at mouth,near Lakeview

Odell Creek near LakeviewJones Creek near LakeviewRed Rock River near Kennedy

Ranch, near LakeviewFeet Creek at county road,near Lakeview

Long Creek near LakeviewEast Fork Clover Creek at

mouth, near MonidaRed Rock River below Lima

Reservoir, near MonidaCabin Creek above Simpson

Creek, near LimaIndian Creek above Simpson

Creek, near Lima

Simpson Creek above IndianCreek, near Lima

Deadman Creek near DellBig Sheep Creek below Muddy

Creek, near DellRed Rock River at Red RockBlack Canyon Creek nearGrant

Shennon Creek near mouth,near Grant

Frying Pan Creek near GrantTrapper Creek at mouth, near

GrantBear Creek near GrantBloody Dick Creek near Grant

Horse Prairie Creek nearGrant

Rape Creek above reservoir,near Grant

Painter Creek near GrantBrowns Canyon Creek near GrantMedicine Lodge Creek near Grant

Pole Creek near mouth, nearPolaris

Reservoir Creek at mouth,near Polaris

East Fork Dyce Creek at mouth,near Polaris

West Fork Dyce Creek atmouth, near Polaris

Grasshopper Creek near Dillon

Beaverhead River at BarrettsEast Fork Blacktail Creeknear Dillon

West Fork Blacktail Creeknear Dillon

Blacktail Deer Creeknear Dillon

Beaverhead River near Dillon

Q.90

6

.7

.111

.4

.1

5.5

38

.5

2.7

11

.2

.3

.4

339

1802

.4

1.3

311

29

.2

215

.6

.9

.5

.3

24

20015

5

35

140

Q.80

7

.8

.212

.5

.2

6.7

49

.7

31

17

.3

.5

.5

446

2102

.6

2.4

313

34

.3

216

.8

1

.8

.4

27

23017

7

38

180

Q.50

9

1.2

14.7

.3

71

66

1

31

45

.5

.7

.8

559

2902

.8

2.7

417

44

.5

328

1

2

1

.6

34

36021

10

44

330

Q.20

11

1.4

171

.5

92

88

2

52

84

.8

1

1

772

3603

1

31

522

57

.7

43

12

2

2

2

1

46

48022

12

49

520

QM

9

1.3

151

.4

81

67

1

42

57

.6

.8

1

559

3003

1

2.8

418

45

.5

32

10

1

2

1

.8

36

38019

9

44

380

Q.90

5

.6

.110

.3

.1

4.4

41

.5

2.6

5

.2

.3

.3

345

1902

.4

1.3

311

33

.2

1.9

4

.5

.7

.5

.2

29

19016

7

30

280

November

Q.80

6

.7

.211

.4

.2

5.6

48

.6

2.8

12

.3

.4

.5

447

2202

.5

2.4

313

37

.3

216

.7

1

.7

.4

34

25016

7

35

340

Q.50

7

.9

.212

.5

.2

6.9

70

.9

31

23

.4

.6

.7

554

2602

.7

2.6

415

44

.4

328

1

1

1

.6

39

41019

9

42

490

Q.20

8

1.3

141

.3

71

84

1

42

58

.6

1

1

662

3003

1

2.7

419

54

.5

32

13

1

2

1

.8

45

52019

11

50

610

QM

7

.8

.312

.8

.3

61

67

1

31

40

.5

.7

.8

555

2702

.7

2.6

416

45

.4

32

10

1

1

1

.6

39

39017

9

44

500

32

Table 3.--Change in average inter-station correlation as a result of record extension

Change in

Station No.

0601100006013500060155000601750006019500

0602450006024590060290000603050006033000

0604030006043000060435000604800006048500

0605000006055500060615000606250006073000

0607450006077000060785000609050006092500

0610250006109800061100000611550006118500

06191800061930000619350006194000

1232350012324100123245901233000012332000

1233550012343400123465001235600012356500

123595001236000012360500

Oct.

-0.04.03

-.11.06.11

-.12.10.15

-.15-.09

-.16-.15-.02-.10-.04

.01-.09-.02-.07-.14

.00

.09-.09-.16-.09

.04-.17-.02.01

-.11

.00-.05-.07-.04

-.11-.12-.16-.04-.03

-.05-.05-.13.07

-.19

-.02-.14-.11

Nov.

0.10-.03-.04-.10.12

.12

.10

.17-.11-.02

-.21-.19.00.13

-.03

-.01-.17.01

-.01-.13

.00

.12-.07-.07-.05

.06

.02

.01

.00-.04

-.14-.02-.01-.04

.13-.04-.12.02

-.01

.01-.09-.09.15.25

-.06-.07.02

average inter-station correlation for specified

Dec.

-0.45.01.03

-.06.07

.16

.13-.18.09

-.04

-.16-.10.00.03

-.02

-.02.19.03

-.01-.13

.00

.03

.06

.06

.05

-.13.03.08

-.03.04

.05-.04-.09-.07

-.04-.14-.13.03

-.02

.07-.15-.05.18

-.21

-.04-.09.02

Jan.

0.06.15.14

-.02.13

.30-.01.24.16.00

-.03.31.12.09.07

.00

.66

.01

.05

.02

.00

.11-.06-.01.11

.14

.05

.08

.09

.10

-.05-.03.00

-.03

.05

.11-.06.03.02

.07-.05.00.07.02

.09

.22

.26

Feb.

0.66.25.20.12.11

.06

.08

.95

.36

.04

.06

.40

.18

.18

.12

.10

.10

.04

.12

.02

.00

.19

.10-.01.21

.27-.08.12.08.00

.43

.07

.02

.09

-.04.20.06.10.11

.07-.20.04.09.02

.04

.17

.16

Mar.

0.53-.01-.06.05.19

.12-.21.44.22.02

-.17.23.06.07

-.05

.12-.15.03.05.09

.00

.15-.01-.06-.03

.56-.12.12.04.09

.27

.14

.06-.02

-.03-.06-.06.09.06

.09-.10.02.49.10

.2301.23

Apr.

-0.17-.04-.19.20

-.01

.05-.06-.07-.09-.05

.07-.05-.04-.12-.10

-.01-.20.05

-.08.06

.00-.06-.09-.11-.22

-.01-.18-.07.00

-.11

.06-.06-.04-.15

-.06-.05-.03-.05-.03

.00-.05-.03.13.10

-.14-.17-.13

May

0.05-.06-.19-.01-.03

.02

.03

.14

.04

.01

.09-.23-.03.10.10

-.03.16

-.02.04.01

.00-.05-.06.29.04

.33

.06

.11

.03-.02

.07-.10-.02-.13

.00

.12-.08-.05-.02

-.01.14.03

-.11-.19

-.16.31.10

June

0.12.04.04.09

-.02

-.01-.06.09.07

-.01

.09

.22

.08-.02.00

.05-.14.00

-.02-.08

.00-.01-.03-.09-.03

-.01-.07.04.06.00

.01

.10-.04.00

-.01-.01-.08.00.03

-.01.10

-.13.00

-.05

.04-.02.04

July

0.10.12.02.11.06

.18-.13.05

-.01.02

-.17.25.04

-.01-.05

.01-.08.00

-.03-.05

.00

.10-.10-.11.06

.01-.07.00.05.02

-.18.08.06.04

.00

.00-.19-.01.01

.00

.12-.02-.02-.02

.00-.04.08

month

Aug.

-0.03.02

-.12.06

-.02

.03-.08.15

-.03-.08

-.22.14

-.04-.02-.04

.03-.08-.04-.06-.13

.00

.01-.04-.04-.03

-.10-.12-.09-.01-.08

-.1 1.01

-.09-.13

-.08-.13-.1 1-.07-.02

-.03-.04-.14-.23-.10

.01-.14-.19

Sept.

-0.01.15

-.05.12.06

.23

.11

.03-.15-.07

.02

.10

.01

.10-.03

.04-.15-.03-.04-.11

.00

.09-.10-.09-.08

.07-.13.00.04

-.01

.24-.09-.04.02

-.01-.09-.02.00.05

-.02.02

-.11-.12-.11

-.12-.22.11

31

Table 2. --Streamflow-gaging stations used for record-extension anal ysis--Continued

Site No.

296299300302304

305308313314316

317

323

324325326

327328

329332333

334336337338341

342343344345346

347348349350351

352353

354355356

357358

359

360361

362363364365

Stream name

Missouri River at VirgelleMiddle Fork Judith River near UticaSouth Fork Judith River near UticaJudith River near UticaRoss Fork near Hobson

Big Spring Creek near LewistownCottonwood Creek near MooreJudith River near WinifredWolf Creek near StanfordMissouri River near Landusky

North Fork Musselshell River nearDelpine

South Fork Musselshell River aboveMartinsdale

Big Elk Creek at mouth, at TwodotMusselshell River at HarlowtonAmerican Fork near Harlowton

Lebo Creek near HarlowtonAmerican Fork below Lebo Creek, near

HarlowtonMusselshell River near RyegateBig Coulee near LavinaMusselshell River near Roundup

Musselshell River near MusselshellBox Elder Creek near WinnettMcDonald Creek at WinnettMusselshell River near MosbyBig Dry Creek near Van Norman

Missouri River below Fork Peck DamBoxelder Creek near Rocky BoyMissouri River near Wolf PointMissouri River near CulbertsonTower Creek at Tower Falls,Yellowstone National Park

Big Creek near EmigrantShields River near WilsallShields River near Clyde ParkBrackett Creek near Clyde ParkSweet Grass Creek above Melville

German Gulch near RamsayRacetrack Creek below Granite Creek,near Anaconda

Little Blackfoot River near GarrisonBoulder Creek at MaxvilleMiddle Fork Rock Creek near

Philipsburg

Blackfoot River near HelmvilleNevada Creek above reservoir, nearHelmville

East Fork Bitterroot River nearConner

Skalkaho Creek near HamiltonSkyland Creek near Essex

Bear Creek near EssexSpotted Bear River near Hungry HorseTwin Creek near Hungry HorseLower Twin Creek near Hungry Horse

Station No.

0610950006109780061098000611000006111000

0611150006112100061135000611450006115200

06115500

06118500

061200000612050006121000

0612150006122000

061235000612570006126500

0612750006129000061295000613050006131000

0613200006137570061770000618550006187500

0619180006193000061935000619400006200500

1232350012324100

123245901233000012332000

1233500012335500

12343400

1234650012356000

12356500123595001236000012360500


1935-861972-801958-791920-761946-62

1932-571957-631929-321950-621934-86

1940-80

1942-80

1953-561907-861907-14;1924-32

1907-14;1924-321946-67

1946-801957-721946-86

1928-32 ; 1945-80;1983-861930-38;1959-721930-45:1953-561929-32;1934-861940-47:1949-86

1934-861976-861929-861941-52;1958-861922-43

1973-80;1983-851935-571921-23:1929-671921-23:1934-571913-25:1937-69

1955-691957-73

1972-861939-861938-86

1941-541940-86

1956-73

1949-53:1957-801946-52

1946-521949-561948-56:1965-671948-56

30

Table 2. --Streamf low-gaging stations used for record-extension anal ijs is--Continued

Site No.

186187189190193

194199204206207

211

215

216

219

222

225228231

238239

244246247248249

252253

254255256

257258259260265

267269272275276

277278

282283284

286288289294295

Stream name

Ben Hart Creek near BelgradeReese Creek near BelgradeGallatin River near LoganSixteenmile Creek near RinglingMissouri River near Toston

Crow Creek near RadersburgBeaver Creek near WinstonPrickly Pear Creek near ClancyTenmile Creek near RiminiTenmile Creek near Helena

Beaver Creek at mouth, near EastHelena

Missouri River below Holter Dam,near Wolf Creek

Little Prickly Pear Creek nearMarysvi lie

Little Prickly Pear Creek nearCanyon Creek

Little Prickly Pear Creek near WolfCreek

Dearborn River near demonsDearborn River near CraigSmith River near White Sulphur

SpringsSmith River near Fort LoganSheep Creek near White Sulphur

Springs

Smith River near EdenMissouri River near UlmNorth Fork Sun River near AugustaSun River near AugustaSun River below diversion dam, nearAugusta

Willow Creek near AugustaSun River below Willow Creek, nearAugusta

Smith Creek near AugustaFord Creek near AugustaElk Creek near Augusta

Sun River at SimmsMuddy Creek near VaughnMuddy Creek at VaughnMissouri River near Great FallsBelt Creek near Monarch

Belt Creek near PortageMissouri River at Fort BentonTwo Medicine River near BrowningBadger Creek near BrowningBadger Creek below Four Horns Canal,near Browning

Badger Creek near FamilyBirch Creek at Swift Dam, near

ValierBirch Creek near ValierCut Bank Creek near BrowningCut Bank Creek at Cut Bank

Marias River near ShelbyMarias River near LomaTeton River near FarmingtonDeep Creek near ChoteauTeton River near Button

Station No.

0605069906051000060525000605300006054500

0605550006057599060615000606250006063000

06063099

06066500

06068500

06071000

06071300

060730000607350006074500

0607669006077000

0607750006078200060785000608000006080900

0608150006082200

060825000608350006084500

0608580006088300060885000609030006090500

0609061006090800060920000609250006093200

0609350006094500

060981000609850006099000

0609950006102050061025000610600006108000


1951-541951-541906;1928-861950-55191 1-17;1941-86

1919-29;1966-721984-861908-1 6; 1921 -33; 1946-70; 1979-861915-861908-54

1980-86

1946-86

1913-33

1909-25

1962-67

1921-23;1929-531946-691923-31 ;1934-36

1978-861941-73

1951-701957-861911-12 ; 1946-681906-401968-81

1906-251968-75

1906-131906-131906-25

1966-791968-861935-68;1971-861957-861951-83

1980-841906-861907-24;1951-771951-73;19801974-86

1907-251913-29

1977-841918-251906-20; 1923-24; 195 2- 74; 1978-79; 1982-86

1906-08;1911-22;1924-861960-721947-551911-251954-86

29

Table 4.- -Estimated monthly streamflow characteristics for October and Wovember--Continued

Site No.

82

83

84

85

86

87

88

899091

92

93

9495

96

97

98

99

100

101

102103

104105106

107108109110111

112113

114

115117

118119

120

121122

123124125126127

October

Stream name

Twelvemile Creek at mouth,near Wise River

Sullivan Creek at mouth,near Wise River

Oregon Creek near mouth,near Wise River

California Creek above AmericanCreek, near Wise River

American Creek at mouth,near Wise River

Sixmile Creek at mouth,near Wise River

French Creek near mouth,near Wise River

Deep Creek near Wise RiverBear Creek near Wise RiverBryant Creek at mouth,near Wise River

Big Hole Rivernear Wise River

Johnson Creek at mouth,near Wise River

Meadow Creek near Wise RiverJacobson Creek at mouth,

near Wise RiverMono Creek at mouth,

near Wise River

Wyman Creek at mouth,near Wise River

Lacy Creek at mouth,near Wise River

Gold Creek at mouth,near Wise River

Pattengail Creek at mouth,near Wise River

Sheep Creek at mouth,near Wise River

Wise River near Wise RiverAdson Creek at mouth,

near Wise RiverJerry Creek near Wise RiverDivide Creek at DivideCanyon Creek near Divide

Moose Creek near DivideTrapper Creek near MelroseCamp Creek at MelroseBig Hole River near MelroseWillow Creek near Glen

Birch Creek near GlenHells Canyon Creek

near Twin BridgesJefferson River

near Twin BridgesWhitetail Creek near WhitehallBoulder River above High Ore

Creek, near Basin

Boulder River near BoulderLittle Boulder River

near BoulderBoulder River above Cabin

Gulch, near BoulderBoulder River near CardwellSouth Boulder River near

Jefferson Island

Jefferson River at SappingtonSouth Willow Creek near PonyNorth Willow Creek at PonyWillow Creek near HarrisonNorwegian Creek near Harrison

Q.90

1

2

.2

2

.5

.3

4

2212

160

1

28

.9

4

3

1

11

2

351

623

541

3107

112

770

314

188

23

2913

8703245

Q.80

2

2

.3

3

.7

.5

5

2512

200

1

210

1

6

4

2

14

2

411

734

542

3608

122

900

419

2410

30

3614

100065

116

Q.50

3

3

.4

4

1

.7

7

3123

280

2

314

2

8

5

2

19

3

542

935

663

49010

153

1300

729

3712

42

5218

15001712307

Q.20

4

5

.7

5

2

1

9

3524

430

3

521

3

11

7

4

27

5

853

1169

785

71012

204

1700

1047

6015

63

7725

19003318528

QM

3

3

.5

4

1

.8

7

3023

320

2

416

2

9

6

3

21

4

612

1057

663

53010

163

1300

732

4112

46

5719

15001711317

Q.90

1

1

.2

2

.4

.3

4

21.9

1

200

.8

27

.8

4

2

1

11

1

351

523

54.9

3506

72

1100

219

257

30

3711

130076

165

November

Q.80

2

2

.2

2

.6

.4

4

2312

230

1

29

1

5

3

1

13

2

401

633

541

4007

82

1200

222

287

33

4112

150098

196

Q.50

2

3

.3

3

.8

.6

6

2713

290

2

313

2

7

4

2

17

3

482

734

652

4908

103

1500

228

369

41

5114

16002215376

Q.20

3

3

.5

4

1

.8

7

2713

390

2

418

2

9

6

3

22

4

572

868

774

65010

134

1800

336

4612

50

6219

19002717447

QM

3

3

.4

3

.9

.6

6

2513

300

2

313

2

7

5

2

18

3

492

756

663

5208

113

1500

330

3810

43

5315

17001913346

34

Table 4. --Estimated monthly streamflov characteristics for October and Wovember--Continued

OctoberSite No.

42

43

44

45

46

47

48

49

50

51

52

53

545556

57

58596061

62

63

64

65

66

6768

69

7071

72

73

74

75

76

777879

80

81

Stream name

Beaverhead River nearTwin Bridges

Corral Creek at mouth,near Alder

Coal Creek at mouth,near Alder

Ruby River above the forks ,near Alder

East Fork Ruby River at mouth,near Alder

West Fork Ruby River at mouth,near Alder

Cottonwood Creek at mouth,near Alder

Warm Springs Creek at mouth,near Alder 1

North Fork Greenhorn Creekat mouth, near Alder

Ruby River above reservoir,near Alder

Mill Creek at Forest Serviceboundary, near Sheridan

Wisconsin Creek at ForestService boundary, nearSheridan

Ruby River near Twin BridgesBig Hole River near JacksonAndrus Creek near mouth,

near Jackson

Fox Creek at mouth, nearJackson

Governor Creek near JacksonWarm Springs Creek at JacksonMiner Creek near JacksonBig Lake Creek near

mouth, near Wisdom

Steel Creek above FrancisCreek, near Wisdom

Francis Creek at mouth,near Wisdom

Steel Creek near mouth,near Wisdom

Swamp Creek near mouth,near Wisdom

Joseph Creek at mouth,near Wisdom

Trail Creek near WisdomRuby Creek at mouth,

near WisdomTie Creek at Forest Service

boundary, near WisdomJohnson Creek near WisdomMussigbrod Creek near Wisdom

North Fork Big Hole Rivernear mouth, near Wisdom

Big Hole River belowNorth Fork, near Wisdom

Pintlar Creek near ForestService boundary, near Wisdom

Big Hole River belowMudd Creek, near Wisdom

Fishtrap Creek at mouth,near Wise River

Lamarche Creek near Wise RiverSeymour Creek near Wise RiverTentnile Creek at mouth,

near Wise RiverSevenmile Creek at mouth,near Wise River

Corral Creek at mouth,near Wise River

Q.90

220

.4

2

6

2

3

3

46

1

91

7

5

140123

2

14863

2

3

5

6

2

154

5

32

29

110

5

120

5

1162

.4

.5

Q.80

260

.6

2

8

3

3

4

48

2

100

9

6

170134

2

16974

2

4

6

7

3

175

7

43

34

130

6

150

7

1272

.6

.7

Q.50

440

1

3

11

4

5

5

50

3

120

11

7

230175

3

1911116

3

4

8

9

4

217

9

54

43

190

7

210

8

16104

.9

1

Q.20

640

1

4

14

6

7

8

54

4

140

14

10

260227

5

2516168

4

6

11

13

7

2610

14

86

58

280

12

310

15

22155

1

2

QM

480

1

3

11

4

5

6

51

3

120

11

8

220186

4

2113126

3

5

9

11

5

228

10

75

47

210

9

230

12

18124

1

1

Q.90

380

.4

1

6

2

2

3

46

1

100

6

4

16093

2

13873

2

3

5

6

2

154

5

32

28

130

4

140

5

952

.3

.4

November

Q.80

440

.5

2

7

2

3

3

47

2

110

7

5

190103

2

15984

2

3

6

6

3

165

6

42

31

150

5

160

6

1072

.5

.6

Q.50

600

.7

3

9

3

4

5

49

2

120

9

6

220134

3

1811105

3

4

7

8

4

196

8

53

39

190

6

210

7

1393

.7

.9

Q.20

710

1

3

12

4

5

6

52

3

140

11

8

250186

4

2015137

3

5

8

9

5

229

11

74

48

260

8

280

12

18124

1

1

QM

590

.8

3

10

4

4

5

49

2

120

9

7

220145

3

1812115

3

4

7

8

4

197

9

64

41

200

7

220

9

14103

.8

1

33

Table 4.--Estimated monthly streamfloor characteristics for October and November--Continued

OctoberSiteNo. Stream name

129

130

131

132

133

134

135

136

137

138

139

140

141

142

143

144

145146147148

149150

151152153

154

155

156

i57158

159

160

161162

163

164

165

166

167

168

Jefferson River nearThree Forks

Madison River nearWest Yellowstone

Duck Creek nearWest Yellowstone

Cougar Creek nearWest Yellowstone

Grayling Creek nearWest Yellowstone

Red Canyon Creek nearWest Yellowstone

South Fork Madison Rivernear West Yellowstone

Watkins Creek nearWest Yellowstone

Trapper Creek nearWest YellowstoneMadison River belowHebgen Lake, near Grayling

Cabin Creek nearWest Yellowstone

Beaver Creek nearWest Yellowstone

Elk River at mouth, nearCameron

Soap Creek at mouth,near Cameron

Antelope Creek at mouth,near Cameron 2

West Fork Madison Rivernear Cameron

Squaw Creek near CameronStandard Creek near CameronRuby Creek near CameronIndian Creek near Cameron

Madison River near CameronBlaine Spring Creek

near CameronO'Dell Creek near EnnisJack Creek near EnnisMoore Creek at Ennis

North Fork Meadow Creek atForest Service boundary,near Ennis

North Fork Meadow Creek atHighway 287, near Ennis

Madison River below EnnisLake, near McAllister

Hot Springs Creek near NorrisCherry Creek near Norris

Madison River nearThree Forks

Cache Creek at mouth, nearWest Yellowstone

Taylor Creek near GraylingPorcupine Creek near

Gallatin GatewayGallatin River aboveWest Fork, near Big Sky

South Fork West Fork GallatinRiver near Gallatin Gateway

Middle Fork West Fork GallatinRiver near Gallatin Gateway

West Fork Gallatin Rivernear Gallatin Gateway

Squaw Creek nearGallatin Gateway

Hellroaring Creek nearGallatin Gateway

Q.90

1100

340

22

7

16

.3

98

2

1

480

7

21

11

.6

14

42

653

19

97024

11019

.6

6

4

1100

520

1100

2

225

190

12

5

24

14

18

Q.80

1300

380

24

9

19

.4

100

2

2

880

8

24

14

.8

15

44

653

23

110024

11021

.7

8

4

1400

622

1400

3

256

210

15

6

29

15

20

Q.50

1800

440

28

11

23

.5

110

2

2

1400

10

29

19

1

16

51

874

28

170027

11023

.9

11

6

2000

727

2000

4

297

240

19

8

37

19

25

Q.20 QM

2200

500

32

20

34

2

130

4

3

1800

16

37

29

2

19

59

1085

37

210030

110252

17

10

2400

1031

2500

6

3710

320

28

12

52

23

31

1800

440

27

16

28

1

110

3

3

1300

13

31

22

2

17

54

874

31

160027

11023

1

12

7

1900

826

2000

4

318

250

21

9

39

19

25

Q.90

1400

340

20

6

13

.2

91

1

1

690

5

18

10

.5

13

37

543

16

88022

10014

.5

4

3

1100

417

1300

2

174

160

10

5

20

13

16

November

Q.80

1500

390

21

8

15

.4

95

2

1

830

6

20

12

.7

14

41

653

19

100023

10015

.7

5

3

1400

519

1400

2

205

170

12

5

23

14

17

Q.50

1900

430

25

10

18

.6

100

2

2

1400

7

25

18

1

15

45

764

24

160024

10018

.8

8

4

2100

622

1900

3

256

210

15

7

29

17

21

Q.20

2200

470

26

18

25

2

110

4

3

1900

11

31

25

2

17

56

975

31

210026

110192

10

6

2500

825

2300

5

348

250

19

9

36

20

24

QM

1900

420

23

14

21

1

100

3

2

1400

9

26

19

1

16

48

764

25

160025

10018

1

8

5

2000

722

1900

4

267

210

15

7

29

17

20

35

Table 4. --Estimated monthly streamflow characteristics for October and November--Continued


169

170

171

172

173

174175176177178

179180

181

182

183

184

185186187188

189190

191192193

194195196

197198

199200201202

203

204205

206207208

209

210

211

212

213

South Fork Spanish Creek nearGallatin Gateway

Spanish Creek nearGallatin Gateway

Gallatin River nearGallatin Gateway

Big Bear Creek nearGallatin Gateway

South Cottonwood Creeknear Gallatin Gateway

Baker Creek near Manhattan 3Rocky Creek near BozemanBear Canyon Creek near BozemanSourdough Creek near BozemanEast Gallatin River at Bozeman

Bridger Creek near BozemanEast Gallatin River

near BelgradeEast Fork Hyalite Creeknear Bozeman

West Fork Hyalite Creeknear Bozeman

Hyalite Creek at HyaliteRanger Station, near Bozeman

Hyalite Creek aboveInterstate 90, near Bozeman

Thompson Creek near BelgradeBen Hart Creek near BelgradeReese Creek near BelgradeEast Gallatin River

near Manhattan

Gallatin River near LoganSixteenmile Creek near

RinglingSixteenmile Creek near MaudlowSixteenmile Creek near TostonMissouri River near Toston

Crow Creek near RadersburgDry Creek near TostonDeep Creek below North Fork,

near TownsendDuck Creek near TownsendConfederate Gulch near Winston

Beaver Creek near WinstonAvalanche Gulch near WinstonSpokane Creek near East HelenaMcGuire Creek at county

road, near East HelenaTrout Creek at mouth,

near East Helena

Prickly Pear Creek near ClancyPrickly Pear Creek at mouth,

near East HelenaTenmile Creek near RiminiTenmile Creek near HelenaSevenmile Creek near mouth,near Helena

Tenmile Creek at mouth,near East Helena

Silver Creek at Interstate 15,near Helena

Beaver Creek at mouth,near East Helena

Elkhorn Creek near mouth,near Wolf Creek

Willow Creek below ElkhornCreek, near Wolf Creek

Q.90

11

24

350

5

15

64821034

740

4

9

24

6

27296

170

5601

1720

3100

1228

35

2.7

36

13

1722

.311

2

8

5

3

2

Q.80

13

28

380

5

16

70102

1142

844

5

10

28

7

30297

180

6004

1823

3500

1329

46

3137

13

1924

.531

3

8

6

3

2

Q.50

17

36

450

6

19

1001331551

1061

6

12

36

9

33318

210

8507

2934

4400

154

10

57

5148

15

2830

152

5

11

8

4

3

Q.20

23

47

590

8

23

1302041762

1580

8

16

52

15

363211

230

11009

3751

5400

195

15

69

8368

15

3536

3124

8

12

11

6

5

QM

18

36

470

6

20

1001531554

1163

7

13

39

11

33318

190

8406

3041

4500

164

12

57

6358

14

2931

373

6

11

8

5

4

Q.90

10

21

300

4

13

7191

1038

639

3

7

17

4

27297

160

6104

1821

3700

927

34

2.8

37

12

1924

.431

3

8

6

3

2

Q.80

11

23

330

4

14

92102

1146

744

4

8

19

5

28297

170

7804

2026

4000

1028

35

3137

12

2025

.641

3

9

6

3

2

November

Q.50

13

29

380

5

16

110132

1351

958

5

10

27

7

33308

190

8905

2836

4700

1239

46

5247

14

2731

172

5

11

7

4

3

Q.20

15

34

470

6

20

1201941557

1372

6

12

34

9

353210

210

10007

3350

5600

154

13

47

7458

16

3135

3134

6

11

11

6

6

QM

13

28

390

5

16

110143

1351

1058

5

10

27

8

32319

180

8905

2840

4800

123

11

46

5347

14

2731

293

5

11

8

5

4

36

Table 4.--Estimated monthly streamflow characteristics for October and Wovember--Continued


214

217

218

219

220

221

222

223224226

227

228229

230

232

233

234

235

236

237

238239

240

241

242

243

244245

246247

248249

250

251

254

255256257260

261

Q.90

Cottonwood Creek above Beartooth .5Ranch, near Wolf Creek

Virginia Creek at mouth,near Canyon Creek

Canyon Creek below CottonwoodCreek, near Canyon Creek

Little Prickly Pear Creeknear Canyon Creek

Lyons Creek near Wolf Creek

Wolf Creek at mouth,at Wolf Creek

Little Prickly Pear Creeknear Wolf Creek

Wegner Creek near Craig 1*Stickney Creek near Craig5Middle Fork Dearborn River at

Highway 200, near Wolf Creek

South Fork Dearborn River atHighway 434, near Wolf Creek

Dearborn River near CraigFlat Creek above Slew Creek,

near CraigSheep Creek at mouth,

near CascadeNorth Fork Smith River atHighway 89, near WhiteSulphur Springs

South Fork Smith River at mouthnear White Sulphur Springs

Smith River below forks,near White Sulphur Springs

Big Birch Creek at mouth,near White Sulphur Springs

Newlan Creek below CharcoalGulch, near White SulphurSprings

Camas Creek near mouth,near White Sulphur Springs

Smith River near Fort LoganSheep Creek nearWhite Sulphur Springs

Sheep Creek near mouth,near White Sulphur Springs

Eagle Creek near mouth,near White Sulphur Springs

Rock Creek below Buffalo Canyonnear White Sulphur Springs

Tenderfoot Creek below SouthFork, near White SulphurSprings

Smith River near EdenHound Creek near mouth,

near CascadeMissouri River near UlmNorth Fork Sun River

near Augusta

Sun River near AugustaSun River below diversion dam,

near AugustaWillow Creek near Anderson

Lake, near AugustaNorth Fork Willow Creek below

Cutrock Creek, near AugustaSmith Creek near Augusta

Ford Creek near AugustaElk Creek near AugustaSun River at SimmsMissouri River near

Great FallsDry Fork at mouth, at Monarch

3

4

12

5

2

35

007

6

417

13

3

, 8

11

17

3

3

9011

16

2

, 8

13

9213

320065

10080

2

3

6

1219

1104100

7

Q.80

.6

4

5

13

5

3

44

008

7

488

16

4

9

12

20

3

4

9612

19

2

9

16

11015

370071

11096

2

3

7

1332

1305000

8

Q.50

.9

6

8

18

7

4

58

00

11

10

7013

23

6

12

18

32

5

5

12015

26

3

11

21

14021

470094

110130

3

3

14

1645

1905500

11

Q.20

2

9

15

25

9

7

85

00

16

14

9117

25

11

17

26

41

8

9

14018

38

6

15

27

19030

6000140

120190

5

4

21

1865

2506800

17

QM

1

7

11

20

7

5

65

00

13

11

7213

21

8

13

20

29

6

7

12016

31

5

13

23

17024

4800110

110140

4

3

15

1648

2005800

14

Q.90

.4

3

4

11

5

2

42

007

6

468

10

3

9

9

21

4

3

989

12

1

6

11

8910

350067

5560

2

3

4

621

1404200

6

November

Q.80

.6

4

6

15

6

3

49

008

7

519

12

4

10

12

22

5

5

10010

16

2

8

13

10013

420069

17079

2

3

6

725

1604900

7

Q.50

1

7

9

20

7

4

64

00

10

9

6812

17

7

11

18

28

6

6

11013

22

3

10

16

13018

500086

240130

3

3

12

1033

2105600

10

Q.20

2

9

16

26

9

6

79

00

12

11

9217

18

14

14

29

31

8

9

12015

31

4

13

19

20025

6200110

360160

4

4

16

1453

2407300

14

QM

1

7

11

21

7

4

64

00

10

9

7213

15

8

12

20

25

6

7

11013

25

4

11

16

15021

530092

270130

3

3

12

1139

2105900

11

37

Table 4.--Estimated monthly streamflow characteristics for October and Wovember--Continued

Site No.

262

263

264

265266

267268

269

270

271

273

274

278

279

280

281

282283284285

286287

288290291

292

.293

294295296

297298299

301

303

306

307

October

Stream name

Tillinghast Creek aboveJoice Creek, near Monarch

Pilgrim Creek at mouth,near Monarch

Logging Creek at Logging CreekCampground, near Monarch

Belt Creek near MonarchBig Otter Creek above Never

Sweat Creek, near Raynesford

Belt Creek near PortageHighwood Creek below Smith

Creek, near HighwoodMissouri River at

Fort BentonShonkin Creek below Bishop

Creek, near HighwoodSouth Fork Two Medicine Rivernear East Glacier

South Fork Badger Creeknear Browning

North Fork Badger Creeknear Browning

Birch Creek at Swift Dam,near Valier

South Fork Dupuyer Creeknear Dupuyer

North Fork Dupuyer Creeknear Dupuyer

Dupuyer Creek below ScoffinCreek, near Dupuyer

Birch Creek near ValierCut Bank Creek near BrowningCut Bank Creek at Cut BankMarias River at Sullivan

Bridge, near Cut Bank

Marias River near ShelbyMarias River at "F" Bridge,

above Tiber Reservoir,near Shelby

Marias River near LomaTeton River near StrabaneMcDonald Creek near Strabane

North Fork Deep Creeknear Choteau

South Fork Deep Creeknear Choteau

Deep Creek near ChoteauTeton River near DuttonMissouri River at Virgelle

Lost Creek at mouth, near UticaYogo Creek at mouth, near UticaMiddle Fork Judith River

near UticaSouth Fork Judith River at

Indian Hill Campground,near Utica

Judith River above CourtneysCreek, at Utica

East Fork Big Spring Creekat mouth, near Lewis town

Big Spring Creek above

Q.90

6

5

6

352

175

3800

3

12

9

9

18

2

2

6

292330

180

180210

470139

3

3

728

4000

5.3

4

1

7

5

110

Q.80

7

6

7

414

216

4300

4

14

13

11

25

3

3

7

363135

210

210240

540159

4

4

840

4900

7.5

5

2

10

6

120

Q.50

9

9

9

525

377

5400

5

21

18

16

55

4

5

10

475658

310

320370

8102010

6

6

1163

6100

918

2

13

8

130

Q.20

11

13

10

746

6110

6900

8

31

28

25

110

6

7

16

5394

110510

530620

11002412

9

9

13110

7700

13414

4

21

12

130

QM

10

10

9

655

469

5600

6

23

20

19

64

5

5

12

456677

380

390460

8602011

7

7

1175

6300

103

10

3

17

9

130

Q.90

6

5

6

294

144

4000

3

10

9

8

.3

2

2

5

252531

190

190220

33079

3

3

734

4800

5.2

2

1

5

4

100

November

Q.80

6

6

6

315

185

5000

3

14

11

10

1

2

3

8

303437

210

210240

3701610

4

4

844

5400

6.7

3

1

8

5

110

Q.50

8

7

8

455

316

5600

4

24

16

15

4

3

4

10

445259

310

320370

6302010

5

5

1170

6400

814

2

10

7

120

Q.20

10

10

8

627

487

7200

4

37

23

21

19

5

6

15

577885

420

430510

8402511

7

7

1297

7600

1147

2

15

10

120

QM

8

8

7

496

346

6000

4

23

17

16

12

4

4

12

445663

330

340400

6402111

6

5

1076

6600

934

2

12

8

120Cottonwood Creek, near Hanover

309

310

311

Cottonwood Creek at Highway200, near Lewis town

Beaver Creek at county road,near Lewis town

Big Spring Creek at mouth,near Lewis town

3

2

98

3

4

110

4

7

130

7

9

140

6

7

130

2

5

85

3

6

94

4

8

110

5

11

120

4

9

110

38

Table 4.--Estimated monthly streamflow characteristics for October and November--Continued


312

313315

316317

318

319

320

321

322

323

324

325326330

331

333335

338339

340341

Warm Springs Creek aboveMeadow Creek, near Hilger

Judith River near WinifredCow Creek below forks,near Cleveland

Missouri River near LanduskyNorth Fork Musselshell River

near Delpine

Checkerboard Creek nearCheckerboard

Spring Creek below WhitetailCreek, near Checkerboard

North Fork Musselshell Rivernear mouth, near Martinsdale

Alabaugh Creek at mouth,near Lennep

Cottonwood Creek below LocoCreek, near Martinsdale

South Fork Musselshell Riverabove Martinsdale

Big Elk Creek at mouth,at Twodot

Musselshell River at HarlowtonAmerican Fork near HarlowtonCareless Creek below Little

Careless Creek, nearHedgesville

Swimming Woman Creek belowDry Coulee, near Franklin

Musselshell River near RoundupFlatwillow Creek below

the forks, near Grass RangeMusselshell River near MosbyBig Dry Creek above Little Dry

Creek, near Van Norman

Q.90

100

2403

43004

1

3

5

2

10

11

.6

190.5

.5

123

20

Little Dry Creek near Van Norman .1Big Dry Creek near Van Norman .1

Q.80

100

2403

53005

1

4

6

3

13

18

.9

45.2.6

.6

253

150

.2

.3

Q.50

110

4204

67006

2

6

9

4

17

30

7

712.8

.9

684

69.2

22

Q.20

120

5506

81009

3

8

13

5

22

40

15

11052

2

11015

1202

58

QM

110

4105

68007

2

6

10

4

18

31

8

7631

1

7310

821

35

Q.90

97

2402

51005

.7

3

6

2

8

13

.3

350.4

.3

152

100

.2

.3

November

Q.80

100

2403

59006

1

3'7

2

10

18

.9

540.6

.5

334

360

.4

.5

Q.50

110

4504

68007

1

4

9

3

12

28

10

762.7

.5

644

74.2

12

Q.20

110

5805

80009

2

5

11

4

14

35

14

11041

1

12014

1401 .3

34

QM

110

4204

71007

2

5

10

3

12

28

9

8121

.9

7410

87.8

23

Includes estimated spring flow of about 40 cubic feet per second, based on information provided byMontana Department of Fish, Wildlife and Parks.

2 Includes estimated spring flow of about 10 cubic feet per second, based on information provided byMontana Department of Fish, Wildlife and Parks.

3 Estimated long-term monthly streamflow characteristics may not reflect the current flow regime becauseof upstream streamflow regulation.

^Stream is known to be dry except for periods of runoff. Calculated flows were adjusted by subtracting7 cubic feet per second.

5 Stream is known to be dry except for periods of runoff. Calculated flows were adjusted by subtracting8 cubic feet per second.

39

Table 5 .--Estimated monthly streamflow characteristics for December and January

[Q.XX, monthly mean strearoflow for specified month exceeded XX percent of the years, in cubic feet per second; QM, mean monthly streamflow for specified month, in cubic feet per second]

DecemberSite No. Stream name

1

2345

6

789

10

1112

13

14

15

16

1718

1920

21

2223

2425

2627

282930

32

33

34

35

36

3738

39

40

41





Ranch, near LakeviewPeet Creek at county road,

near Lakeview





Creek, near Lima



Creek, near DellRed Rock River at Red RockBlack Canyon Creek near Grant




Horse Prairie Creek near GrantRape Creek above reservoir,

near GrantPainter Creek near GrantBrowns Canyon Creek near GrantMedicine Lodge Creek near Grant

Pole Creek near mouth,near Polaris


East Fork Dyce Creek atmouth, near Polaris



Beaverhead River at BarrettsEast Fork Blacktail Creeknear Dillon

West Fork Blacktail Creeknear Dillon

Blacktail Deer Creeknear Dillon


Q.90

5

.6

.19.3

.1

4.5

12

.4

2.6

10

.2

.3

.4

338

1801

.3

1.3

28

21.2

1.8

3

.5

.6

.5

.3

18

18012

5

26

280

Q.80

5

.6

.19.4

.1

4.5

17

.5

2.7

16

.3

.4

.4

340

1901

.4

1.3

29

23.2

214

.6

.7

.6

.3

21

23013

6

27

330

Q.50

6

.7

.210

.5

.2

5.7

29

.6

3.9

23

.4

.5

.6

447

2102

.5

1.4

313

31.3

216

.8

1

.8

.4

30

35016

7

32

470

Q.20

6

.7

.311

.7

.2

51

42

.9

31

33

.5

.7

.8

552

2402

.7

2.6

316

40.4

329

1

1

1

.6

38

42016

8

38

560

QM

6

.7

.210

.6

.2

5.8

31

.7

31

26

.4

.6

.7

446

2302

.6

1.5

313

33.3

217

.9

1

1

.5

30

35015

7

32

460

Q.90

4

.5

.18.3

.1

4.4

13

.4

2.5

11

.2

.3

.3

234

1301

.3

.8

.2

28

21.1

1.7

3

.4

.5

.4

.2

19

18011

4

23

210

January

Q.80

5

.5

.19.3

.1

4.4

25

.4

2.6

17

.2

.3

.3

337

1501

.3

1.3

29

24.2

1.8

4

.5

.6

.5

.3

20

23013

5

25

270

Q.50

5

.6

.210

.5

.2

5.7

33

.6

2.8

23

.3

.5

.5

340

1701

.5

1.4

311

28.3

216

.7

1

.7

.4

23

30013

6

30

380

Q.20

6

.7

.211

.7

.2

5.9

60

1

31

28

.4

.6

.6

447

1802

.6

1.5

313

33.3

228

1

1

1

.5

32

35015

7

33

440

QM

5

.6

.29.5

.2

5.7

39

.7

2.8

23

.3

.5

.5

342

1801

.5

1.4

312

29.2

216

.7

1

.7

.4

25

30013

6

30

370

40

Table 5.--Estimated monthly streamflow characteristics for December and Janua ry--Continued

DecemberSite No.

42

43

4445

46

47

48

49

50

51

52

53

545556

57

58596061

62

63

64

65

66

6768

69

7071

72

73

74

75

76

777879

80

81

Stream name



Coal Creek at mouth, near AlderRuby River above the

forks, near AlderEast Fork Ruby River at mouth,near Alder









near Jackson

Fox Creek at mouth,near Jackson

Governor Creek near JacksonWarm Springs Creek at JacksonMiner Creek near JacksonBig Lake Creek near mouth,

near Wisdom










Big Hole River below NorthFork, near Wisdom


Big Hole River below MuddCreek, near Wisdom


Lamarche Creek near Wise RiverSeymour Creek near Wise RiverTenmile Creek at mouth,

near Wise RiverSevenmile Creek at mouth,

near Wise RiverCorral Creek at mouth,near Wise River

Q.90

340

.4

15

2

2

3

45

1

93

6

4

14082

1

10663

1

2

4

4

2

93

5

22

19

100

3

110

4

852

.3

.4

Q.80

410

.4

26

2

3

3

46

2

97

6

4

15093

2

11763

2

2

4

5

2

114

5

32

23

120

4

120

5

962

.4

.5

Q.50

510

.6

27

3

3

4

47

2

1 10

7

5

160113

2

15984

2

3

6

6

3

165

7

43

32

150

5

160

7

1183

.5

.7

Q.20

610

.8

39

4

4

5

49

2

130

8

6

200144

3

1713105

3

4

7

8

4

197

9

63

40

180

7

200

10

14103

.7

1

QM

520

.6

28

3

4

4

48

2

110

7

5

180124

2

151084

2

3

6

7

3

166

8

53

33

150

6

170

8

1283

.6

.7

Q.90

270

.3

14

2

2

2

44

1

76

5

3

12072

1

10652

1

2

4

4

2

113

4

32

20

85

3

90

4

741

.3

.3

January

Q.80

340

.4

15

2

2

2

45

1

90

6

4

12082

1

11753

2

2

4

5

2

124

5

32

23

98

4

110

5

852

.3

.4

Q.50

430

.5

27

3

3

3

47

2

100

7

5

140103

2

13874

2

3

5

6

3

145

6

43

28

130

5

140

7

1072

.5

.6

Q.20

510

.7

28

3

4

4

48

2

120

7

6

170124

3

151095

2

4

6

7

4

156

8

53

33

160

6

180

8

1293

.7

.8

QM

440

.5

27

2

3

3

47

2

100

6

5

150103

2

13974

2

3

5

6

3

145

6

43

28

130

5

140

7

1072

.5

.6

41

Table 5.--Estimated monthly streamflow characteristics for December and January--Continued


82

83

84

85

86

87

88

899091

92

93

9495

96

97

98

99

100

101

102103

104105106

107108109110111

112113

114

115117

118119

120

121122

123124125126127

Twelvemtle Creek at mouth,near Wise River








Big Hole River nearWise River




near Wise River

Wyman Creek at mouth,near Wise River

Lacy Creek at mouth,near Wise River

Gold Creek at mouth,near Wise River


Sheep Creek at mouth,near Wise River

Wise River near Wise RiverAdson Creek at mouth,

near Wise RiverJerry Creek near Wise RiverDivide Creek at DivideCanyon Creek near Divide


Birch Creek near GlenHells Canyon Creek near

Twin BridgesJefferson River near

Twin BridgesWhitetail Creek near WhitehallBoulder River above High Ore

Creek, near Basin




Jefferson Island


Q.90

1

1

.1

2

.4

.3

3

15.8

1

160

.7

17

.8

4

2

1

9

2

351

422

33.7

2805

62

970

216

216

26

328

110087

185

Q.80

1

2

.2

2

.5

.3

3

17.9

2

180

.9

28

.9

4

3

1

11

2

371

523

441

3106

62

1000

219

246

30

379

1200119

235

Q.50

2

2

.2

2

.6

.4

4

2212

220

1

211

1

6

4

2

14

2

441

634

541

3907

82

1300

223

308

35

4311

13001611305

Q.20

3

3

.3

3

.8

.6

5

2313

280

2

314

2

7

5

2

18

3

502

756

662

4708

103

1500

230

3810

43

5315

16001913356

QM

2

2

.3

2

.7

.5

5

2112

230

1

212

1

6

4

2

15

2

442

645

552

4007

82

1300

224

318

36

4512

14001511295

Q.90

1

1

.1

1

.3

.2

2

15.6

1

130

.6

16

.6

3

2

.9

8

1

31.7

422

33.7

2305

62

840

113

175

22

278

91066

153

January

Q.80

1

1

.1

2

.4

.3

3

17.7

1

150

.8

17

.7

4

2

1

10

1

34.9

423

43.8

2706

62

890

117

225

28

349

96097

203

Q.50

2

2

.2

2

.6

.4

4

1912

200

1

210

1

5

3

2

13

2

371

534

441

3507

82

1000

124

308

36

4411

110011

- 8244

Q.20

2

3

.3

3

.8

.5

5

2112

250

1

312

1

7

4

2

16

3

432

645

552

4308

103

1200

228

359

40

5014

14001511295

QM

2

2

.2

2

.6

.4

4

18.9

2

200

1

210

1

5

3

2

13

2

381

534

441

3507

82

1100

123

298

34

4211

1200129

244

42



129

130

131

132

133

134

135

136

137

138

139

140

141

142

143

144

145146147148

149150

151152153

154

155

156

157158

159

160

161162

163

164

165

166

167

168






Red Canyon Creeknear West Yellowstone



Trapper Creek nearWest Yellowstone

Madison River belowHebgen Lake, near Grayling



Elk River at mouth,near Cameron


Antelope Creek at mouth,near Cameron 2



Madison River near CameronBlaine Spring Creeknear Cameron

O'Dell Creek near EnnisJack Creek near EnnisMoore Creek at Ennis


North Fork Meadow Creekat Highway 287, near Ennis






Gallatin GatewayGallatin River above West

Fork, near Big Sky




Squaw Creek near GallatinGateway


Q.90

970

340

18

6

12

.3

85

1

1

700

5

17

10

.6

13

31

543

15

92021

9914

.5

3

2

1200

413

1500

2

174

140

8

4

17

12

13

Q.80

1100

370

19

7

13

.5

88

2

1

770

6

18

12

.6

13

35

543

17

100021

10015

.6

4

3

1300

414

1500

2

184

150

9

4

18

12

14

Q.50

1400

430

21

9

16

.7

94

2

2

890

7

21

15

.8

14

40

653

19

110023

10016

.8

6

4

1500

517

1800

3

205

170

12

5

23

14

17

Q.20

1800

460

22

14

19

2

100

3

2

1100

9

23

20

1

16

49

754

23

130025

10017

1

7

5

1700

620

1900

4

226

210

15

7

28

17

20

QM

1400

420

20

11

17

1

95

2

2

970

8

21

17

1

15

42

653

20

120023

10016

1

6

4

1500

517

1700

3

205

180

12

6

24

14

17

Q.90

1000

330

16

6

10

.4

83

1

1

690

4

15

8

.4

12

30

432

14

89021

9511

.5

3

2

1100

39

1100

2

163

130

7

3

15

10

12

January

Q.80

1100

360 .

18

7

12

.4

87

1

1

760

5

17

10

.5

13

31

542

16

95022

9712

.6

4

2

1200

412

1200

2

174

140

9

4

17

11

13

Q.50

1300

420

19

10

15

.8

93

2

2

910

7

19

13

.8

14

36

643

18

110023

10014

.8

5«

3

1500

515

1500

3

195

170

11

5

21

13

15

Q.20

1500

450

21

12

18

1

98

3

2

1100

8

22

17

1

15

44

754

21

120024

10016

1

6

4

1600

618

1600

3

216

190

14

6

25

15

18

QM

1300

410

19

10

15

1

93

2

2

890

7

19

14

.8

14

38

643

18

110023

9914

.8

5

3

1400

515

1400'

3

195

170

11

5

21

13

15

43



169

170

171

172

173

174175176177178

179180

181

182

183

184

185186187188

189190191192193

194195196

197198

199200201202

203

204205

206207208

209

210

211

212

213

South Fork Spanish Creeknear Gallatin Gateway







near BelgradeEast Fork Hyalite Creeknear Bozeman




Thompson Creek near BelgradeBen Hart Creek near BelgradeReese Creek near BelgradeEast Gallatin River

near Manhattan

Gallatin River near LoganSixteenmile Creek near RinglingSixteenmile Creek near MaudlowSixteenmile Creek near TostonMissouri River near Toston



Beaver Creek near WinstonAvalanche Gulch near WinstonSpokane Creek near East HelenaMcGuire Creek at county road,

near East HelenaTrout Creek at mouth,

near East Helena








Q.90

8

17

260

3

11

757.7

835

531

2

5

13

4

24296

140

6502

1518

3200

625

23

1.8

36

11

1621

.421

2

8

5

3

2

Q.80

9

18

280

3

11

84919

41

537

3

6

15

4

26296

140

7302

1621

3300

726

34

2136

11

1722

.631

2

8

6

3

2

Q.50

10

22

320

4

13

94112

1146

847

3

8

21

6

30308

160

7904

2229

3800

938

35

4247

13

2226

162

3

9

7

4

3

Q.20

12

27

390

5

16

1101631252

1259

5

10

25

7

32329

180

9106

2740

4300

113

11

45

5347

14

2630

2103

5

10

9

5

4

QI1

10

22

330

4

14

95122

1147

949

4

9

21

6

29308

160

8004

2333

3900

939

35

4247

13

2327

272

4

10

8

4

3

Q.90

7

15

250

3

10

667.6

731

428

2

5

10

3

24284

130

580.2

1317

2700

414

23

1136

10

1319

.331

2

7

5

2

2

January

Q.80

8

17

270

3

11

74818

36

432

2

6

13

4

27286

140

650.8

1620

3000

525

23

2136

11

1621

.541

2

8

5

3

2

Q.50

10

20

310

4

13

8310

11040

638

3

7

18

5

31297

150

7103

1825

3400

727

34

3237

11

1823

152

3

8

6

3

3

Q.20

11

24

350

4

15

981421246

1155

4

9

21

7

34308

160

8305

2435

3900

939

35

4247

13

2428

2103

4

10

8

5

3

QM

9

20

310

4

13

84112

1041

742

4

8

18

5

30307

150

7203

2028

3400

727

34

3237

12

2025

t72

3

9

7

4

3

44



214

217

218

219

220

221

222

223224226

227

228229

230

232

233

234

235

236

237

238239

240

241

242

243

244245

246247

248249

250

251

254

255256257260

261

Q.90











Dearborn River near CraigFlat Creek above Slew Creek,near Craig

Sheep Creek at mouth,near Cascade

North Fork Smith River atHighway 89, nearWhite Sulphur Springs

4

6

15

5

2

45

006

5

406

8

2

South Fork Smith River at mouth, 7near White Sulphur Springs

Smith River below forks, nearWhite Sulphur Springs



Camas Creek near mouth,near White Sulphur Springs

Smith River near Fort LoganSheep Creek nearWhite Sulphur Springs

Sheep Creek near mouth,near White Sulphur Springs

Eagle Creek near mouth, nearWhite Sulphur Springs


Tenderfoot Creek belowSouth Fork, nearWhite Sulphur Springs



near Augusta







8

13

3

3

797

10

1

, 5

9

548

400059

4173

2

2

5

418

1304300

5

Q.80

.5

6

8

20

5

2

50

007

6

478

9

3

7

9

14

4

4

848

13

2

6

10

6611

450063

9985

2

3

6

619

1404800

5

Q.50

.7

9

13

27

6

3

57

009

8

6211

12

4

10

12

21

5

5

9811

18

2

8

13

11015

530071

180130

2

3

8

1023

1805800

8

Q.20

1

11

19 - 33

8

4

67

00

11

9

8314

13

6

12

16

27

6

7

11012

24

3

11

15

15020

610094

260170

3

3

12

1327

2106800

11

QM

.9

8

14

26

7

4

58

009

8

6711

11

4

10

13

20

5

6

9911

20

3

9

13

12016

540079

200130

3

3

10

1024

1905800

9

Q.90

.4

3

4

12

4

2

32

005

4

366

6

2

6

7

10

3

3

736

10

1

5

7

519

370050

2675

1

2

4

412

1203800

4

January

Q.80

.4

4

5

14

5

2

38

006

5

417

8

3

7

8

12

3

3

807

12

2

6

9

6110

420054

9282

2

2

5

617

1404600

5

Q.50

.7

6

9

19

5

3

50

008

7

539

11

4

9

11

17

4

5

9510

17

3

8

12

9314

530065

170110

2

3

7

826

1805400

7

Q.20

1

7

12

24

7

4

61

009

8

6711

12

5

12

13

26

5

6

11011

22

3

10

14

14018

640074

240160

3

3

10

1037

2407100

9

QM

.7

6

9

20

6

3

51

008

6

569

10

4

9

11

18

4

5

959

17

2

8

11

10015

530066

180120

2

3

7

831

1905700

7

45

Table 5.--Estimated monthly streamflow characteristics for December and January Continued

DecemberSite No.

262

263

264

265266

267268

269270

271

273

274

278

279

280

281

282283284285

286287

288290291

292

293

294295296

297

298

299

301

303

306

307

Stream name



Logging Creek at Logging CreekCampground , near Monarch




Creek, near HighwoodMissouri River at Fort BentonShonkin Creek below Bishop














South Fork Deep Creeknear Choteau


Lost Creek at mouth, nearUtica

Yogo Creek at mouth, nearUtica

Middle Fork Judith River,near Utica

South Fork Judith River atIndian Hill Campground,near Utica


East Fork Big Spring Creekat mouth, near Lewistown


Q.90

4

4

5

184

104

38002

9

10

9

0

2

2

7

341317

150

150170

11088

3

3

730

4600

5

.4

.3

1

5

3

92

Q.80

5

4

5

225

124

43003

10

11

10

1

2

3

9

372223

170

170190

180159

3

3

739

5200

5

.7

.5

1

7

4

100

Q.50

7

5

6

375

225

54003

14

14

13

7

3

3

13

393635

240

250290

370199

4

4

958

6500

7

1

2

2

9

6

110

Q.20

8

7

7

476

346

69003

19

19

18

17

4

5

16

515961

360

370440

6502311

6

6

1094

7400

9

3

3

2

12

9

120

QM

7

6

6

356

245

56003

15

16

15

13

3

4

13

444244

280

290340

3901910

5

5

968

6400

7

2

2

2

10

7

110

Q.90

3

3

4

144

73

40002

8

8

7

.6

2

2

6

185

17120

120140

11078

2

2

637

4100

4

.7

0

1*

5

4

96

January

Q.80

4

4

4

174

94

50003

9

9

8

1

2

2

7

251723

150

150180

160149

3

3

742

4900

5

.7

0

1

6

4

98

Q.50

6

6

6

295

175

56003

12

12

11

8

3

3

9

343133

210

210240

300169

4 *

4

755

6000

6

2

.1

2

8

6

100

Q.20

7

8

6

386

276

72004

14

16

15

13

3

4

12

454950

300

310360

5002010

5

5

966

7700

8

2

.

2

10

8

110

QM

6

6

5

295

175

60003

12

13

12

8

3

3

10

353338

230

240280

3301610

4

4

855

6300

6

2

3 0

2

8

6


309

310

311

Cottonwood Creek at Highway200, near Lewistown

Beaver Creek at county road,near Lewistown

Big Spring Creek at mouth,near Lewistown

2

6

70

2

7

82

3

9

96

4

10

110

3

9

98

2

5

76

2

6

80

3

7

89

4

10

100

3

8

92

46



312

313315

316317

318

319

320

321

322

323

324

325326330

331

333335

338339

340

341


Judith River near WinifredCow Creek below forks.near Cleveland


near Delpine











Musselshell River near RoundupFlatwillow Creek below the

forks, near Grass RangeMusselshell River near MosbyBig Dry Creek above Little Dry


Little Dry Creek nearVan Norman

Big Dry Creek near Van Norman

Q.90

96

2402

49005

.7

2

5

1

7

11

.2

371.5

.4

162

170

0

0

Q.80

100

2503

56005

.9

3

6

2

8

14

.6

472.6

.5

253

310

.2

.2

Q.50

100

4703

69006

1

3

8

2

10

21

8

673.8

.6

575

67.4

.8

1

Q.20

110

5904

79007

2

4

9

3

11

27

11

9151

.8

11011

130.8

2

2

QM

100

4204

69006

1

4

8

3

10

22

7

7231

.7

718

821

2

3

Q.90

96

2402

46004

.7

2

5

1

6

8

.1

31.8.4

.4

243

110

0

0

January

Q.80

100

2402

52004

.8

2

5

2

7

11

.3

431.5

.4

343

210

0

0

Q.50

110

4903

66006

1

3

7

2

9

17

6

562.8

.6

526

700

.1

.1

Q.20

110

6003

83007

2

4

9

3

11

23

8

7431

.8

1109

120.8

1

2

QM

100

4303

67006

1

3

7

2

8

18

5

612.8

.6

697

861

2

3



3 Estimated long-term monthly streamflow characteristics may not reflect the current flow regimebecause of upstream streamflow regulation.

"*Stream is known to be dry except for periods of runoff. Calculated flows were adjusted bysubtracting 7 cubic feet per second.

5 Stream is known to be dry except for periods of runoff. Calculated flows were adjusted bysubtracting 8 cubic feet per second.

47

Table 6.--Estimated monthly streamflow characteristics for February and March


Site No.

1

2345

6

789

10

1112

13

14

15

16

1718

1920

21

2223

2425

2627

282930

32

33

34

35

36

3738

39

40

41

February

Stream name





Ranch, near LakeviewPeet Creek at county road,

near Lakeview





Creek, near Lima


Deadman Creek near DellBig Sheep Creek belowMuddy Creek, near Dell

Red Rock River at Red RockBlack Canyon Creek near Grant


Frying Pan Creek near GrantTrapper Creek at mouth,

near GrantBear Creek near GrantBloody Dick Creek near Grant






West Fork Dyce Creek at mouth,near Polaris


Beaverhead River at BarrettsEast Fork Blacktail Creek

near DillonWest Fork Blacktail Creek

near DillonBlacktail Deer Creek

near DillonBeaverhead River near Dillon

Q.90

4

.5

.18.2

.1

3.4

16

.4

2.5

8

.2

.3

.3

232

1401

.3

.8

.2

27

21.1

1.7

2

.4

.6

.4

.2

19

18011

4

20

260

Q.80

4

.5

.19.3

.1

4.5

31

.5

2.6

14

.2

.3

.3

235

1401

.4

1.3

28

25.2

1.9

4

.5

.7

.5

.3

21

23011

5

27

300

Q.50

5

.6

.210

.4

.2

5.6

47

.7

2.8

22

.3

.4

.4

339

1602

.5

1.4

210

30.2

216

.7

1

.6

.3

27

31013

6

34

380

Q.20

7

.8

.212

.5

.2

6.9

63

1

31

31

.4

.5

.6

446

1802

.7

2.5

416

41.3

228

1

1

.9

.5

33

36019

8

40

470

QM

5

.7

.210

.4

.2

5.7

49

.7

2.9

22

.3

.4

.5

341

1702

.5

1.4

312

32.3

216

.8

1

.7

.4

27

30015

6

34

380

Q.90

4

.5

.28.2

.1

3.4

26

.5

2.6

7

.2

.3

.3

336

1201

.3

1.3

28

29.2

1.8

5

.5

.7

.5

.2

27

20012

5

31

280

Q.80

4

.5

.28.3

.1

4.5

42

.6

2.7

13

.2

.3

.4

339

1402

.4

1.3

29

31.2

216

.6

.8

.6

.3

32

27013

6

36

320

March

Q.50

4

.5

.29.4

.2

4.8

56

.8

21

21

.4

.5

.6

446

1702

.6

2.5

312

39.3

219

.9

1

.8

.5

44

33014

8

41

410

Q.20

5

.6

.210

.4

.3

41

98

1

22

28

.6

.7

.8

553

2003

1

3.8

417

63.5

32

13

1

2

1

.7

73

42020

10

53

520

QM

4

.5

.29.4

.2

4.9

67

1

21

21

.4

.6

.6

548

1902

.7

2.6

313

47.4

22

11

1

2

1

.5

53

34015

9

44

420

48

Table 6.--Estimated monthly streamflow characteristics for February and March--Continued

FebruarySite No. Stream name

42

43

4445

46

47

48

49

50

51

52

53

545556

57

58596061

62

63

64

65

66

6768

69

7071

72

73

74

75

76

777879

80

81



Coal Creek at mouth, near AlderRuby River above the forks,

near AlderEast Fork Ruby River at mouth,near Alder






Mi 1^1 Creek at Forest Serviceboundary, near Sheridan



near Jackson


Governor Creek near JacksonWarm Springs Creek at JacksonMiner Creek near JacksonBig Lake Creek near

mouth, near Wisdom








ooundary, near WisdomJohnson Creek near WisdomMussigbrod Creek near Wisdom






Lamarche Creek near Wise RiverSeymour Creek near Wise RiverTenmi le Creek at mouth,

near Wise RiverSevenmile Creek at mouth,near Wise River

Corral Creek at mouth,near Wise River

Q.90

340

.3

15

2

2

2

44

1

84

5

3

11072

1

9552

1

2

3

4

2

93

4

21

17

100

3

110

3

641

.3

.4

Q.80

380

.4

15

2

2

3

45

1

90

5

4

12082

1

10663

1

2

4

4

2

93

5

32

20

110

3

120

4

852

.4

.5

Q.50

450

.5

27

2

3

3

47

2

100

6

5

130103

2

12874

2

3

5

5

3

124

6

32

26

130

4

140

6

1072

.5

.6

Q.20

520

.7

39

3

4

4

49

2

110

8

6

150134

3

181295

3

4

7

8

4

217

8

53

41

180

6

190

8

1293

.7

.9

QM

450

.6

27

3

3

4

47

2

100

7

5

130113

2

13974

2

3

5

5

3

145

6

42

28

140

4

150

6

1072

.5

.7

Q.90

360

.4

15

2

2

2

45

1

89

5

3

11082

1

9653

1

2

3

3

2

93

5

21

18

120

2

130

3

752

.3

.4

Q.80

400

.4

26

2

3

3

46

1

94

5

3

12093

2

10763

1

2

4

4

2

103

5

31

20

130

3

140

4

862

.4

.5

March

Q.50

500

.7

28

3

4

4

48

2

110

5

4

150114

2

131084

2

3

5

5

3

135

7

42

28

160

4

170

6

1083

.6

.8

Q.20

590

1

312

4

5

6

51

3

120

6

4

210156

3

1813106

3

4

7

7

4

207

10

62

40

210

5

230

7

13103

1

1

QM

500

.8

39

3

4

4

49

2

110

5

4

170124

3

151185

2

3

6

5

3

156

8

52

32

180

4

190

6

1193

.7

.9

49

Table 6.--Estimated monthly streamflow characteristics for February and «arch--Continued

February MarchSiteNo.

82

83

Stream name


Sullivan Creek at mouth,

Q.90

1

1

Q.80

1

1

Q.50

2

2

Q.20

2

2

QM

2

2

Q.90

1

1

Q.80

2

2

Q.50

2

2

Q.20

3

3

QM

2

2near Wise River

84 Oregon Creek near mouth, near Wise River

85 California Creek above American Creek, near Wise .River

86 American Creek at mouth, near Wise River

87 Sixmile Creek at mouth, near Wise River

88 French Creek near mouth, near Wise River

89 Deep Creek near Wise River90 Bear Creek near Wise River91 Bryant Creek at mouth,

near Wise River

92 Big Hole River near Wise River93 Johnson Creek at mouth,

near Wise River94 Meadow Creek near Wise River95 Jacobson Creek at mouth,

near Wise River96 Mono Creek at mouth,

near Wise River

97 Wyman Creek at mouth, near Wise River

98 Lacy Creek at mouth, near Wise River

99 Gold Creek at mouth, near Wise River

100 Pattengail Creek at mouth, near Wise River

101 Sheep Creek at mouth, near Wise River

102 Wise River near Wise River103 Adson Creek at mouth,

near Wise River104 Jerry Creek near Wise River105 Divide Creek at Divde106 Canyon Creek near Divide

107 Moose Creek near Divide108 Trapper Creek near Melrose109 Camp Creek at Melrose110 Big Hole River near Melrose111 Willow Creek near Glen

112 Birch Creek near Glen113 Hells Canyon Creek near

Twin Bridges114 Jefferson River near

Twin Bridges115 Whitetail Creek near Whitehall117 Boulder River above High Ore

Creek, near Basin

118 Boulder River near Boulder119 Little Boulder River near

Boulder120 Boulder River above Cabin

Gulch, near Boulder121 Boulder River near Cardwell122 South Boulder River near

Jefferson Island

123 Jefferson River at Sappington124 South Willow Creek near Pony125 North Willow Creek at Pony126 Willow Creek near Harrison127 Norwegian Creek near Harrison

.2

.2 .2 .3 .3

2232

.4 .6 .8 .6

.3 .4 .6 .4

3

14.6

1

160.7

16

.7

3

2

1

8

1

31.8

412

33.5

2805

51

880

115

195

25

307

96077

174

3

15.7

1

170.8

27

.8

4

2

1

10

1

321

423

331

2906

62

970

119

256

30

378

100097

204

4

18.9

2

2001

29

1

5

3

1

13

2

361

534

442

3406

72

1100

226

338

38

4711

1200129

255

6

2713

2702

312

2

7

4

2

16

3

402

734

652

4508

83

1300

333

4210

47

5814

14001712315

4

20.9

2

2101

210

1

5

3

2

13

2

361

534

541

3707

72

1100

226

338

39

4811

13001411275

.1 .2 .3 .5 .4

22343

.4 .5 .8 1 .9

.3

3

14.6

1

180.8

17

.7

4

2

1

10

1

30.9

422

431

3205

52

910

123

307

35

434

11001210255

.3

4

15.6

2

2001

28

1

5

3

1

12

2

341

423

442

3506

62

1000

126

348

39

489

13001311266

.5

5

17.7

2

2401

210

1

6

4

2

15

2

402

544

552

4207

72

1200

234

4310

47

5810

140016

. 1230 .7

8

2613

3202

314

2

8

5

2

20

3

452

745

765

5508

93

1500

348

6215

65

7914

16002316367

8 .6

6

19.8

3

2802

311

1

7

4

2

16

3

402

645

553

4707

73

1200

239

5011

54

6711

14001713317

50

Table 6.--Estimated monthly streamflotr characteristics for February and March--Continued


129

130

131

132

133

134

135

136

137

138

139

140

141

142

143

144

145146147148

149150

151152153

154

155

156

157158

159

160

161162

163

164

165

166

167

168










Madison River below HebgenLake, near Grayling





Antelope Creek at mouth,near Cameron2



Madison River near CameronBlaine Spring Creek

near CameronO'Dell Creek near EnnisJack Creek near EnnisMoore Creek at Ennis









Fork, near Big Sky





Hellroaring Creeknear Gallatin Gateway

Q.90

880

340

17

5

9

.2

82

1

1

570

4

14

8

.5

13

28

432

13

78021

9411

.4

3

2

1000

314

1100

2

143

130

7

3

15

11

12

Q.80

1100

370

18

7

12

.4

87

1

1

680

5

16

10

.5

13

31

542

15

88021

9512

.6

3

2

1200

415

1200

2

164

140

9

4

17

12

13

Q.50

1400

410

20

9

14

.6

93

2

1

790

6

19

13

.7

14

38

643

18

100022

9813

.7

5

3

1400

517

1400

2

195

170

11

5

21

13

16

Q.20 QM

1700

440

23

10

17

98

2

2

950

7

24

16

1

15

45

754

22

120024

9914

6

4

1600

620

1600

3

246

190

13

6

25

16

19

1400

410

21

8

14

.7 .6

92

2

2

820

6

20

13

.8

14

39

653

19

100023

9813

.8 .7

5

3

1400

518

1400

3

205

160

10

5

21

14

16

Q.90

1300

340

18

5

8

.3

84

1

1

390

3

14

10

.5

13

32

532

13

71021

9411

.4

2

2

980

314

990

2

143

130

7

4

14

12

13

Q.80

1400

380

19

6

9

.4

87

1

1

550

3

15

11

.6

14

34

533

13

81022

9511

.5

3

2

1200

415

1200

2

143

150

8

4

16

13

14

March

Q.50

1700

410

20

9

11

.8

92

2

1

800

4

17

14

1

15

42

643

15

100023

9914

.9

. 4

3

1400

518

1400

3

164

160

10

5

19

14

15

Q.20 QM

1900

430

24

9

11

100

2

2

1100

4

18

18

1

17

53

654

17

130024

10015

6

3

1700

624

1800

4

184

200

125-

24

17

20

' 1600

410

20

9

11

.8 1

93

2

1

810

4

17

15

1

16

45

643

16

110023

9813

.9 1

4

3

1400

620

1500

3

174

170

10

5

20

15

16

51

Table 6.--Estimated monthly strearaflow characteristics for February and March Continued

Site No.

169

170

171

172

173

174175176177178

179180

181

182

183

184

185186187188

189190191192193

194195196

197198

199200201202

203

204205

206207208

209

210

211

212

213

February

Stream name








near BelgradeEast Fork Hyalite Creek

near BozemanWest Fork Hyalite Creek

near BozemanHyalite Creek at Hyalite

Ranger Station, near Bozeman


Thompson Creek near BelgradeBen Hart Creek near BelgradeReese Creek near BelgradeEast Gallatin River near

Manhattan






near East Helena








Q.90

7

15

240

3

10

686.5

731

527

2

5

12

3

21275

140

600.8

1618

3100

826

24

1.7

36

11

1621

.331

2

8

5

3

1

Q.80

8

17

270

3

11

75918

37

533

2

6

13

4

25285

140

6502

1722

3400

826

34

1137

11

1822

.641

2

8

6

3

2

Q.50

9

21

310

3

12

85112

1045

746

3

7

17

5

30297

160

7404

2128

3800

928

34

3247

12

2125

162

3

9

7

4

2

Q.20

11

25

350

4

15

99143

1151

1059

4

9

21

6

35328

180

8406

2937

4200

1039

35

4248

14

2831

272

5

11

9

4

2

QM

9

21

310

3

13

88122

1044

849

3

7

17

5

29297

170

7505

2431

3800

938

35

3247

13

2428

162

4

10

8

4

2

Q.90

7

16

250

3

10

8110

18

43

742

2

5

11

3

20276

150

7002

2026

3200

726

24

1137

13

2026

.632

3

9

6

3

1

Q.80

7

18

270

3

11

871128

51

852

3

5

14

3

23286

160

7403

2331

3500

727

24

2237

14

2328

.952

3

9

7

4

2

March

Q.50

8

20

310

3

13

100153

1056

1161

3

7

17

4

30297

170

860112841

3900

939

34

4247

15

2732

273

5

11

8

4

3

Q.20

11

27

370

4

16

110225

1266

2490

4

8

23

5

34329

210

950324158

4800

125

10

46

6358

18

3839

3114

9

13

10

5

3

QM

8

21

310

4

13

100174

1160

1569

3

7

18

5

29308

180

850263147

4100

103

10

35

4358

16

3034

283

6

11

9

5

3

52



214

217

218

219

220

221

222

223224226

227

228229

230

232

233

234

235

236

237

238239

240

241

242

243

244245

246247

248249

250

251

254

255256257260

261

Q.90








Wegner Creek near Craig 1*Stickney Creek near Craig 5Middle Fork Dearborn River at




Sheep Creek at mouth,near Cascade

North Fork Smith River atHighway 89, near WhiteSulphur Springs

South Fork Smith River at mouthnear White Sulphur Springs


Big Birch Creek at mouth, nearWhite Sulphur Springs


Camas Creek near mouth, nearWhite Sulphur Springs

Smith River near Fort LoganSheep Creek near White

Sulphur SpringsSheep Creek near mouth, nearWhite Sulphur Springs






near Augusta







4

6

16

5

2

41

006

5

427

7

2

, 6

6

12

3

3

777

9

1

, 5

8

669

320047

2963

2

2

4

518

1203700

4

Q.80

.4

6

8

19

5

2

49

006

5

467

8

2

8

7

15

4

4

887

12

2

6

9

8812

440052

14089

2

3

5

622

1304700

5

Q.50

.6

7

11

23

6

3

62

008

7

5710

10

3

11

9

26

5

5

1109

16

2

8

11

13014

510064

180120

2

3

8

830

1805900

7

Q.20 QM

10

15

28

7

4

77

00

10

9

7113

13

3

17

10

57

7

6

15011

18

2

9

14

19016

650074

260160

3

4

16

1146

2507500

9

.6 .5

8

12

24

6

3

65

008

7

6111

10

3

12

9

33

5

5

1209

15

2

7

11

15014

530065

220120

2

3

10

933

1905900

7

Q.90

.3

7

10

22

5

2

44

005

4

427

7

1

9

5

20

4

4

937

10

1

6

7

828

370048

5861

2

3

8

71848

4300

5

Q.80

.4

9

14

26

6

3

60

007

6

5410

8

2

12

6

31

5

5

1108

12

1

6

8

11011

450053

15098

2

3

10

71984

5100

6

March

Q.50

.7

15

26

39

8

4

79

009

8

7715

9

2

16

8

49

7

7

1409

16

2

8

10

16017

570061

200T20

3

4

13

928

1406100

8

Q.20

28

49

56

10

5

100

00

12

12

10022

12

2

25

8

100

13

10

18011

18

2

10

11

24023

680080

310190

4

5^

17

1553

2508100

9

QM

7 .8

17

30

43

9

4

81

00

10

9

8416

9

2

19

8

60

9

8

1509

17

2

9

10

17019

570068

230140

3

4

17

1234

1706500

8

53


FebruarySite No.

262

263

264

265266

267268

269270

271

273

274

278

279

280

281

282283284285

286287

288290291

292

293

294295296

297

298

299

301

303

306

307

Stream name



Logging Creek at .Logging CreekCampground, near Monarch








Birch Creek at Swift dam,near Valier

South Fork Dupuyer Creek nearDupuyer

North Fork Dupuyer Creek nearDupuyer





above Tiber Reservoir, nearShelby



South Fork Deep Creek nearChoteau


Lost Creek at mouth, nearUtica

Yogo Creek at mouth, nearUtica

Middle Fork Judith Rivernear Utica

South Fork Judith River atIndian Hill Campground,near Utica


East Fork Big Spring Creek atmouth, near Lewistown


Q.90

4

4

4

154

83

37002

6

8

7

.2

2

2

7

381116

130

130150

14078

3

2

740

3900

4

.3

0

1

4

4

100

Q.80

5

5

5

215

114

47003

7

9

8

2

2

2

9

412425

160

160190

220149

3

3

747

5200

5

.8

0

1

5

5

100

Q.50

6

6

6

296

174

60003

9

12

11

8

2

3

11

513535

260

260310

420179

4

4

867

6700

6

1

.1

2

7

6

1 10

Q.20

8

8

7

418

285

76003

11

15

14

43

3

4

14

656291

490

510600

6302111

5

5

1195

8400

8

2

.{

2

8

6

110

QM

6

7

6

317

194

61003

9

12

11

27

3

3

12

555157

310

320370

4201710

4

4

986

6600

6

1

J .5

1

6

6

110

Q.90

5

5

5

193

93

43001

6

9

8

2

2

2

10

222137

230

230270

130410

3

3

862

4600

5

.6

0

.7

3

3

90

Q.80

5

5

5

246

133

53002

7

10

9

2

2

3

12

293844

260

260310

2206

10

3

3

972

5700

6

.9

.2

.8

4

5

99

March

Q.50

6

7

6

319

243

63002

8

13

12

4

3

3

20

717194

390

400470

390141 1

5

4

10120

7200

7

3

.7

1

6

7

110

Q.20

8

10

7

4315

374

80002

10

16

15

36

4

5

32

210200250830

9001000

7501814

6

6

14200

9100

10

3

2

1

6

9

130

QM

7

8

6

3513

274

66002

9

14

12

16

3

4

22

160120150570

610710

4801312

5

5

11170

7600

8

3

1

1

6

8


309

310

311




1

5

83

2

8

88

3

11

95

3

17

100

2

15

94

1

3

68

2

10

81

2

26

98

3

61

130

3

47

110

54

Table 6.--Estimated monthly streamflow characteristics for February and March Continued


312

313315

316317

318

319

320

321

322

323

324

325326330

331

333335

338339

340

341



Missouri River near LanduskyNorth Fork Musselshell

River, near Delpine










Swimming Woman Creek below DryCoulee, near Franklin


forks, near Grass RangeMusselshell River near MosbyBig Dry Creek above Little Dry




February

Q.90

95

2402

42004

.6

2

5

1

6

11

.1

36.1.4

.3

242

250

0

0

Q.80

100

2502

55005

.8

3

6

2

7

14

.3

46.3.6

.4

373

480

0

0

Q.50

100

5303

72006

1

3

7

2

9

20

7

6511

.5

935

1201

2

3

Q.20

110

6403

93007

1

4

9

2

10

26

9

9722

.6

1605

28050

42

98

QM

100

4803

73006

T

3

8

2

8

21

6

7021

.5

1104

22034

28

62

Q.90

97

2602

55005

.6

2

6

1

5

14

.3

530.2

.2

503

72.3

2

3

Q.80

100

3103

66006

.8

2

7

1

5

17

.7

620.6

.3

804

1203

4

7

March

Q.50

110

5904

8400 18

1

3

9

2

6

29

8

8714

.5

1407

27030

32

73

Q.20

110

710' 5

100012

1

5

14

2

7

53

12

1505

20

.5

2907

630400

210

640

QM

110

5404

89009

1

4

11

2

6

37

7

1102

13

.6

2208

550190

110

300




"*Stream is known to be dry except for periods of runoff. Calculated flows were adjusted bysubtracting 7 cubic feet per second.


55

Table 7.--Estimated monthly streamflow characteristics for April and Hay


Site No.

1

2345

6

789

10

1112

13

14

15

16

1718

1920

21

2223

2425

26

27

282930

32

33

34

35

36

3738

39

40

41

Stream name

Hellroaring Creek nearLakeview




Ranch, near LakeviewPeet Creek at county road,near Lakeview





Creek, near Lima












East Fork Dyce Creek atmouth, near Polaris


Grasshopper Creek nearDillon



near DillonBlacktail Deer Creeknear Dillon


Q.90

5

.6

.310

.5

.4

51

190

1

32

16

.5

.7

.8

549

1703

.9

3.7

417

64

.4

329

1

2

1

.6

54

22019

9

39

210

Q.80

7

.9

.313

1

.6

62

220

2

42

21

.7

1

1

762

1904

1

31

625

70

.6

53

11

2

2

1

.8

62

27026

11

42

270

April

Q.50

13

2.5

212

1

123

350

3

74

40

1

2

2

979

2705

2

52

942

100

1

75

18

3

4

2

1

71

37037

15

54

380

Q.20

25

31

395

1

224

520

5

135

73

2

2

3

14100

3708

3

73

1465

160

2

117

33

5

6

4

2

91

59050

20

67

650

QM

16

2.7

263

1

153

350

3

94

55

1

2

2

1086

2806

2

52

1047

110

1

85

23

4

4

3

2

74

42038

16

55

430

Q.90

41

42

589

2

355

170

5

176

180

2

4

4

1531

789

3

63

1272

100

2

161039

7

5

5

3

42

20048

17

45

36

Q.80

52

52

7511

2

447

240

7

238

220

3

4

5

1940

10011

4

84

1690

130

2

201349

9

7

6

4

57

30064

23

63

98

May

Q.50

70

72

9711

3

569

360

11

2912

290

3

5

6

2163

25015

6

135

31160

210

3

281855

12

11

8

5

100

580110

28

78

180

Q.20

93

103

13016

5

7513

490

15

4017

450

5

7

8

3199

47022

9

197

43210

340

4

372585

16

16

11

7

160

830140

42

120

460

QM

71

82

9812

3

5710

380

11

3013

330

4

6

6

2272

31016

6

146

33160

250

3

291959

13

12

9

5

110

570110

30

88

270

56

Table 7. --Estimated monthly streamflow characteristics for April and May-Continued

Site No. Stream name Q.90

42

43

44

45

46

47

48

49

50

51

52

53

545556

57

58596061

62

63

64

65

66

6768

69

7071

72

73

74

75

76

777879

80

81



Coal Creek at mouth,near Alder

Ruby River above theforks, near Alder

East Fork Ruby River atmouth, near Alder

West Fork Ruby River atmouth, near Alder


Warm Springs Creek atmouth, near Alder 1




Wisconsin Creek at ForestService bounday, near Sheridan


near Jackson


Governor Creek near JacksonWarm Springs Creek at JacksonMiner Creek near JacksonBig Lake Creek near mouth,

near Wisdom













Fishtrap Creek at mouth, nearWise River

Lamarche Creek near Wise RiverSeymour Creek near Wise RiverTenmile Creek at mouth,near Wise River

Sevenmile Creek at mouth, nearWise River

Corral Creek at mouth, nearWise River

290

1

3

11

4

5

6

51

3

110

7

5

92135

3

1813156

3

4

7

7

5

207

10

63

40

260

6

280

8

10114

1

1

Q.80

360

2

4

14

6

7

8

54

4

120

9

7

100157

5

2819188

5

6

12

14

7

3512

13

106

69

410

13

450

14

15155

1

2

April

Q.50

490

3

7

23

9

11

12

63

6

160

17

13

1902212

8

46312313

8

12

20

28

11

6321

21

1715

120

570

31

620

30

29249

2

3

Q.20

710

4

11

35" "u

17

19

75

9

220

31

26

2904318

11

72472920

13

20

34

50

16

11035

33

2932

200

920

58

1000

60

583613

4

4

QM

520

3

8

25

10

12

14

65

7

170

21

17

2002913

8

51342415

9

14

24

33

12

7324

24

2019

140

670

36

720

39

382610

3

3

Q.90

62

5

13

40

20

22

27

81

11

260

54

52

638520

15

74504326

11

21

34

52

28

23040

51

3838

190

820

60

890

95

995824

5

5

Q.80

140

6

17

50

24

28

32

91

14

300

66

62

1209625

18

95625032

14

29

44

68

33

27050

61

4547

250

1000

73

1100

110

1206929

6

7

May

Q.50

240

8

25

75

34

40

46

117

19

410

90

74

25013038

26

1701107547

32

48

78

150

45

37090

86

74160

570

1500

280

1700

190

1609539

8

10

Q.20

560

12

34

100

46

55

63

150

27

530

120

100

36017053

36

23015011064

45

66

110

210

59

480130

110

110260

810

2400

460

2700

270

2?013050

11

14

QM

340

9

26

79

36

42

49

121

21

430

94

77

25014040

28

1801108250

35

50

82

160

47

38097

89

79170

610

1700

310

1900

200

1709940

9

10

57

Table 7.--Estimated monthly streamflow characteristics for April and May--Continued


82

83

84

85

86

87

88

899091

92

93

9495

96

97

98

99

100

101

102103

104105106

107108109110111

112113

114

115117

118119

120

121122

123124125126127





American Creek. at mouth, nearWise River

Sixmile Creek at mouth, nearWise River

French Creek near mouth, nearWise River

Deep Creek near Wise RiverBear Creek near Wise RiverBryant Creek at mouth, nearWise River

Big Hole River nearWise River

Johnson Creek at mouth, nearWise River


near Wise RiverMono Creek at mouth, near

Wise River

Wyman Creek at mouth, nearWise River

Lacy Creek at mouth, nearWise River

Gold Creek at mouth, nearWise River


Sheep Creek at mouth, nearWise River

Wise River near Wise RiverAdson Creek at mouth, near

Wise RiverJerry Creek near Wise RiverDivide Creek at DivideCanyon Creek near Divide



Twin BridgesJefferson River near Twin

BridgesWhitetail Creek near WhitehallBoulder River above High Ore

Creek, near Basin



Gulch, near BoulderBoulder River near CardwellSouth Boulder River nearJefferson Island


April

Q.90

3

3

.5

4

1

.8

7

25.8

3

400

2

415

2

8

6

3

20

4

452

545

752

6607

83

1300

346

599

62

766

15001411258

Q.80

4

5

.7

5

2

1

9

4014

630

3

520

3

11

7

4

26

5

563

856

963

10008

93

1600

362

7911

79

9810

18001913308

Q.50

7

7

1

8

3

2

14

6637

870

5

832

5

18

12

6

41

8

755

159

12

13107

130010

115

2100

4110

14017

120

15015

230030184110

Q.20

10

11

2

12

4

3

22

997

11

1400

7

1250

7

28

18

9

64

12

1108

292027

181813

210015

1710

3000

5190

24027

200

24025

330045235412

QM

7

8

1

9

3

2

16

7148

1000

5

836

5

20

13

7

46

8

836

191318

14138

150011

127

2300

4130

16020

140

18017

260031184210

Q.90

16

19

2

11

4

4

20

1009

13

1200

7

1595

10

39

28

15

88

19

26011

372446

173013

190023

2613

2000

8220

28051

230

28033

22006131217

Q.80

20

23

3

15

6

5

26

1301216

1500

9

19110

12

47

33

18

110

22

30014

493154

223517

230026

3317

2400

13260

33055

260

32036

27007438339

May

Q.50

28

31

4

23

9

7

41

2501724

2300

14

27150

17

67

47

25

150

31

50020

724065

374124

330037

4521

3700

23410

52068

380

47041

40009044.5812

Q.20

36

40

6

33

12

9

59

3302333

3600

20

37190

23

91

62

32

210

41

78027

996096

515851

500048

6930

5300

37550

70085

490

60049

5700140639914

QM

29

32

5

25

9

7

44

2601725

2600

15

29150

18

70

49

26

160

32

53021

744369

394329

360037

5122

4000

25420

53071

390

48044

440094466312

58

Table 7.--Estimated monthly streamflow characteristics for April and Hay- -Continued


129

130

131

132

133

134

135

136

137

138

139

140

141

142

143

144

145146147148

149150

151152153

154

155

156

157158

159

160

161162

163

164

165

166

167

168







South Fork Madison River nearWest Yellowstone






Elk River at mouth,near Catneron





Madison River near CameronBlaine Spring Creek near

CameronO'Dell Creek near EnnisJack Creek near EnnisMoore Creek at Ennis


North Fork Meadow Creek atHighway 287, near Ennis







Fork, near Big Sky





Hellroaring Creeknear Gallatin Gateway

Q.90

1500

410

22

10

13

1

94

2

2

260

5

20

21

2

17

45

754

19

51023

9914

1

5

3

900

621

940

4

195

170

11

6

21

16

17

Q.80

2100

430

26

14

21

2

100

3

2

400

10

26

27

2

19

53

864

25

75023

10017

1

8

5

1000

725

1100

6

227

200

17

8

31

18

22

April

Q.50

2700

460

35

28

44

3

110

6

4

800

23

45

44

3

24

79

13107

45

120025

110233

16

10

1500

1138

1500

10

3213

230

30

12

54

25

32

Q.20

3300

540

59

63

96

8

130

13

8

1400

54

82

68

5

32

110

22171287

170029

120356

30

21

2100

2061

2100

15

4526

340

64

23

110

43

56

QM

2700

480

41

41

61

5

110

9

6

920

33

55

49

4

26

84

15129

58

120026

110254

19

14

1600

1443

1600

10

3417

260

41

15

70

30

38

Q.90

1800

640

90

130

190

21

170

33

19

230

120

160

140

8

36

160

472518

170

79031

130558

47

34

1100

2372

1100

28

- 12051

580

110

39

180

72

98

Q.80

2300

680

110

150

230

23

190

37

21

310

140

190

160

10

42

180

543222

200

100034

1407010

58

41

1300

3093

1300

33

16060

740

140

47

220

86

120

May

Q.50

4300

800

140

160

290

23

210

37

22

590

180

230

210

14

58

250

574626

250

150038

1509312

83

52

1900

39140

2000

43

21070

960

190

63

320

100

150

Q.20

6200

990

190

220

400

28

240

50

29

1200

250

310

270

18

76

330

766236

330

200043

16013017

120

75

2500

55200

2500

55

28096

1200

260

87

430

130

200

QM

4400

830

140

170

300

21

220

38

22

730

180

240

220

14

60

250

594827

260

160038

1509812

88

54

1900

41150

2000

45

23073

970

190

66

320

100

150

59

Table 7.--Estimated monthly streamflow characteristics for April and May --Continued

SiteNo.

169

170

171

172

173

174175176177178

179180

181

182

183

184

185186187188

189190

191192193

194195196

197198

199200201202

203

204205

206207208

209

210

211

212

213

Stream name







Bridger Creek near BozemanEast Gallatin River near

BelgradeEast Fork Hyalite Creek near

BozemanWest Fork Hyalite Creek near

BozemanHyalite Creek at Hyalite

Ranger Station, near Bozeman


Thompson Creek near BelgradeBen Hart Creek near BelgradeReese Creek near BelgradeEast Gallatin River nearManhattan

Gallatin River near LoganSixteenmile Creek nearRingling

Sixteenmile Creek near MaudlowSixteenmile Creek near TostonMissouri River near Toston


near Towns endDuck Creek near TownsendConfederate Gulch near Winston



near East Helena


near East HelenaTenmile Creek near RiminiTenmile Creek near HelenaSevenmile Creek near mouth,

near Helena

Tenmile Creek at mouth, nearEast Helena





Q.90

9

22

320

4

13

89245

1184

2486

6

9

19

5

21277

180

7807

3448

3700

104

10

35

4338

16

3335

393

7

12

9

5

3

Q.80

14

30

370

4

16

1102861398

32110

6

9

23

8

27298

200

9009

3751

4000

135

12

47

7358

16

3436

6144

8

12

11

5

4

April

Q.50

24

46

440

6

19

130451119

160

59160

7

12

35

16

323113

240

110030

5677

5600

209

20

812

16699

18

5048

13306

14

15

15

8

7

Q.20

48

85

640

11

27

170722028

220

90250

9

15

52

34

413318

350

140075

83130

7200

341537

1421

30111510

23

7174

244410

24

19

20

11

15

QM

31

57

490

8

20

140501323

170

62190

8

13

39

22

333113

260

110049

5891

5700

231026

1014

188

109

19

5255

16337

15

16

16

8

10

Q.90

81

120

1100

19

45

130521641

140

63150

22

38

92

57

262922

440

11004

58130

4600

791954

2130

2719169

29

5283

374212

22

16

18

13

27

Q.80

100

150

1400

26

57

190682045

180

96230

26

44

100

68

303026

570

15008

72160

5200

882466

2638

32232110

35

63110

545315

28

17

20

16

31

May

Q.50

140

230

1800

33

72

2701003063

260

140360

30

55

130

82

403540

780

210019

120210

8700

1203180

3350

51232811

40

100130

798916

48

23

25

20

34

Q.20

190

320

2200

50

89

3501404393

350

220460

38

69

170

120

443754

1000

270069

170310

12000

16044110

4568

80303912

56

130190

10012024

73

27

29

27

50

QM

150

240

1800

38

73

2801103269

270

160370

31

56

140

85

373442

780

220034

130230

8800

1303383

3452

55222912

42

110140

849717

53

24

28

21

36

60

Table 7.--Estimated monthly streamflow characteristics for April and Way--Continued


214

217

218

219

220

221

222

223224226

227

228229

230

232

233

234

235

236

237

238239

240

241

242

243

244245

246247

248249

250

251

254

255256257260

261

Q.90


Virginia Creek at mouth, nearCanyon Creek




Wolf Creek at mouth, atWolf Creek

Little Prickly Pear Creek nearWolf Creek

Wegner Creek near Craig1*Stickney Creek near Craig5Middle Fork Dearborn River at



Dearborn River near CraigFlat Creek above Slew Creek

near CraigSheep Creek at mouth, near

CascadeNorth Fork Smith River atHighway 89, near WhiteSulphur Springs

South Fork Smith River atmouth, near White SulphurSprings





Smith River near Fort LoganSheep Creek near White Sulphur

SpringsSheep Creek near mouth, nearWhite Sulphur Springs





near CascadeMissouri River near UlmNorth Fork Sun River nearAugusta

Sun River near AugustaSun River below diversion dam,near Augusta

Willow Creek near AndersonLake, near Augusta

North Fork Willow Creek belowCutrock Creek, near Augusta

Smith Creek near Augusta



7

12

20

6

5

76

005

4

317

11

3

15

9

43

7

7

13010

18

3

, 9

11

18024

380067

14057

4

4

6

821

1004600

9

Q.80

i 1

12

20

32

9

6

92

21

13

12

9118

15

5

18

14

51

11

10

14012

25

4

11

17

21031

420088

230110

4

4

7

925

1505000

12

April

Q.50

3

25

45

60

13

11

150

75

27

27

18034

31

11

27

27

81

16

16

19018

51

8

20

36

36061

6700160

520230

7

5

17

1836

3007600

23

Q.20

6

38

76.

110

19

20

230

151250

50

35053

56

24

42

59

100

22

29

26030

110

19

37

73

560100

8800300

940420

13

7

34

2366

61010000

44

QM

4

25

48

67

14

13

180

87

32

31

20035

36

16

30

39

76

17

20

21021

69

12

25

46

42070

6800200

600290

9

6

25

1745

3907700

30

Q.90

9

25

49

28

24

29

130

151264

51

27031

57

47

38

110

39

16

38

16055

150

29

51

110

36099

5200810

1300290

21

10

42

2955

1606100

62

Q.80

11

31

59

43

28

36

170

231782

66

36041

77

80

49

140

49

20

47

20064

190

37

63

140

460130

6300960

1900340

25

12

52

3786

3307600

76

May

Q.50

15

54

98

100

34

41

330

3931

120

120

670100

190

330

67

240

130

30

52

27089

290

47

83

210

860270

92001200

2900770

27

13

70

61220790

11000

100

Q.20

24

94

190

180

49

58

560

5946160

180

1000160

310

820

100

380

250

48

76

380130

460

71

120

310

1500430

130001500

38001400

38

18

100

89330

170016000

150

QM

17

62

120

120

37

42

380

4134

120

120

680110

210

410

73

260

170

33

54

32096

320

50

88

220

990300

98001300

2800910

28

14

75

64220

110012000

110

61



262

263

264

265266

267268

269270

271

273

274

278

279

280

281

282283284285

286287

288290291

292

293

294295296

297298299

301

303

306

307



Logging Creek at Logging CreekCampground , near Monarch






South Fork Badger Creek nearBrowning

North Fork Badger Creek nearBrowning










North Fork Deep Creek nearChoteau


Deep Creek near ChoteauTeton River near ButtonMissouri River at Virgelle

Lost Creek at mouth, near UticaYogo Creek at mouth, near UticaMiddle Fork Judith River near

UticaSouth Fork Judith River at



East Fork Big Spring Creek atmouth, near Lewistown


Q.90

7

12

7

347

304

48002

10

19

18

6

4

5

11

176780

400

420490

4006

11

7

7

1273

5300

1026

1

5

10

130

Q.80

9

16

8

469

467

51005

15

26

24

7

6

7

18

238394

500

520610

4901111

9

9

13100

6200

1338

3

10

12

140

April

Q.50

15

26

12

8812

10015

770013

28

41

38

13

10

11

35

71120200960

11001200

8302513

15

14

18150

8500

216

12

6

26

23

180

Q.20

24

40

20

18018

27033

1000029

61

64

59

110

15

17

57

150150360

1300

15001700

13004715

23

22

25250

12000

331418

15

60

38

220

QM

17

28

14

12014

14021

790018

39

45

42

54

10

12

39

100120240970

11001200

8903014

16

15

19180

9100

239

14

9

39

27

190

Q.90

30

46

25

23021

26055

670043

130

150

140

63

22

32

63

22340280

1300

14001700

10002614

40

37

1959

7100

462571

27

100

44

220

Q.80

38

61

32

34026

32070

800057

150

170

150

150

27

38

77

32360360

1600

18002100

11004615

47

44

22110

9900

552996

32

120

54

260

May

Q.50

53

93

44

55030

54084

1200079

300

210

200

240

38

50

100

68410550

2300

26003000

14008616

63

60

34340

13000

7929

130

37

170

89

320

Q.20

74

130

59

95042

1200110

18000110

520

270

240

370

50

65

150

140430670

3200

37004300

170012016

82

78

43440

19000

11039

160

52

230

140

380

QM

56

96

45

63031

77085

1200081

340

220

200

250

39

52

110

94400520

2400

27003200

14008716

65

62

36330

14000

8328130

37

170

98


309

310

311



Big Spring Creek at mouth,

3

15

130

5

20

150

11

28

230

23

39

330

14

33

250

31

30

350

40

39

460

66

50

690

120

71

900

75

55

710near Lewistown

62



312

313313

316317

318

319

320

321

322

323

324

325326330

331

333335

338339

340

341


Judith River near WinifredCow Creek below forks,

near ClevelandMissouri River near LanduskyNorth Fork Musselshell River

near Delpine












forks, near Grass RangeMusselshell Rivfer near MosbyBig Dry Creek above Little

Dry Creek, near Van Norman



April

Q.90

95

2604

60007

1

5

9

2

7

43

2

4501

.5

388

54.2

2

3

Q.80

100

2905

700011

2

8

14

4

13

54

5

71.3

3

1

5511

881

2

4

Q.50

110

5008

920017

4

16

23

8

30

99

14

13035

3

11021

1804

6

10

Q.20

110

73012

1400027

9

27

38

17

64

160

25

2407

13

6

32049

54027

23

50

QM

110

5209

1000019

6

18

27

11

40

110

15

17049

4

20033

35058

42

100

Q.90

92

28012

770010

13

28

48

23

94

100

15

64.1

10

10

9387

64.1

1

1

Q.80

98

36015

1000016

16

35

57

30

120

170

21

130.8

12

12

120100

1001

2

3

May

Q.50

100

53021

1400024

20

78

68

43

190

310

40

3003

13

14

310120

3603

5

8

Q.20

110

72031

2100040

31

130

100

68

290

430

62

6301020

21

700170

96017

17

34

QM

100

54023

1600026

22

87

70

47

200

320

43

3907

15

15

440130

63018

17

35




" Stream is known to be dry except for periods of runoff. Calculated flows were adjusted bysubtracting 7 cubic feet per second.


63

Table 8. --Estimated monthly streamflow characteristics for June and July


Site No.

12345

6

789

10

1112

13

14

15

16

1718

1920

21

2223

2425

2627

282930

32

33

34

35

36

3738

39

4041

Stream name

Hellroaring Creek near LakeviewCorral Creek near LakeviewAntelope Creek near LakeviewRed Rock Creek near LakeviewTom Creek near Lakeview

Narrows Creek at mouth, nearLakeview


Ranch, near LakeviewPeet Creek at county road, nearLakeview

Long Creek near LakeviewEast Fork Clover Creek at mouth,

near MonidaRed Rock River below Lima

Reservoir, near MonidaCabin Creek above Simpson Creek,near Lima

Indian Creek above SimpsonCreek, near Lima




Shennon Creek near mouth, nearGrant





Pole Creek near mouth, nearPolar is

Reservoir Creek at mouth, nearPolaris


West Fork Dyce Creek at mouth,near Polaris


Beaverhead River at BarrettsEast Fork Blacktail Creek near

DillonWest Fork Blacktail Creek near

DillonBlacktail Deer Creek near DillonBeaverhead River near Dillon

Q.90

3941

487

1

304

120

4

155

280

2

3

3

1045

906

2

42

1162

831

127

33

5

4

5

3

37

35042

13

7027

Q.80

5151

639

1

395

170

5

196

380

2

4

4

1251

1208

3

73

1792

1302

151041

6

5

6

3

52

48063

17

85110

June

Q.50

7783

9514

3

6010

270

10

3211

460

4

7

7

2491

19015

6

115

29150

2203

261775

11

10

10

6

120

84097

32

120230

Q.20

100104

14021

4

8514

350

14

4616

590

6

9

10

39140

42022

9

178

40220

3305

3824120

16

15

13

8

200

1100140

51

160610

QM

8083

10015

3

6410

280

10

3412

470

5

7

8

2694

25016

7

136

31160

2403

291883

12

11

10

6

140

830100

35

120370

Q.90

182.3

242

.4

132

40

2

72

250

.7

1

1

441

1503

1

2.9

523

42.5

438

2

2

2

1

12

29025

6

4028

Q.80

243.3

303

.5

182

57

2

92

270

1

2

2

547

1803

1

31

729

58.7

53

10

2

2

2

1

18

34030

8

4880

July

Q.50

344.6

414

.8

253

110

3

124

330

2

2

2

864

2406

2

52

944

1001

85

24

3

4

3

2

42

58040

13

77160

Q.20

4341

527

1

335

170

4

185

410

2

3

4

1380

2908

3

63

1266

1402

138

47

5

5

5

3

69

87047

19

100330

QM

374.7

435

1

273

120

3

134

340

2

2

3

967

2506

2

52

1047

1001

96

28

4

4

4

2

48

63040

14

81240

Table 8.--Estimated monthly streamflow characteristics for June and July --Continued

Site No.

42

43

4445

46

47

48

49

50

51

52

53

545556

5758596061

62

63

64

65

66

6768

69

7071

72

73

74

75

76

777879

80

81

Stream name

Beaverhead River near TwinBridges

Corral Creek at mouth, nearAlder

Coal Creek at mouth, near AlderRuby River above the forks,

near AlderEast Fork Ruby River at mouth,near Alder


Cottonwood Creek at mouth, nearAlder


North Fork Greenhorn Creek atmouth, near Alder



Wisconsin Creek at Forest Serviceboundary, near Sheridan

Ruby River near Twin BridgesBig Hole River near JacksonAndrus Creek near mouth, near

Jackson

Fox Creek at mouth, near JacksonGovernor Creek near JacksonWarm Springs Creek at JacksonMiner Creek near JacksonBig Lake Creek near mouth, nearWisdom

Steel Creek above Francis Creek,near Wisdom

Francis Creek at mouth, nearWisdom

Steel Creek near mouth, nearWisdom

Swamp Creek near mouth, nearWisdom

Joseph Creek at mouth, nearWisdom

Trail Creek near WisdomRuby Creek at mouth, nearWisdom

Tie Creek at Forest Serviceboundary, near Wisdom

Johnson Creek near WisdomMussigbrod Creek near Wisdom

North Fork Big Hole River nearmouth, near Wisdom


Pintlar Creek near Forest Serviceboundary, near Wisdom



Lamarche Creek near Wise RiverSeymour Creek near Wise RiverTenmile Creek at mouth, nearWise River

Sevenmile Creek at mouth, nearWise River

Corral Creek at mouth, nearWise River

Q.90

49

3

1033

15

17

20

74

9

240

62

51

8414016

116346

10020

10

16

28

41

21

8734

40

3128

180

710

53

770

70

874518

3

4

Q.80

160

4

1344

19

22

26

85

12

280

80

63

17016021

149566

11027

17

24

43

70

26

17050

51

4353

300

1200

100

1300

99

1305722

4

5

June

Q.50

300

8

2477

33

39

45

118

21

440

120

96

34020037

2516011014046

29

42

73

130

43

27088

85

75120

520

1900

220

2200

170

2109536

8

9

Q.20

680

11

34110

48

57

66

160

30

650

150

130

55024055

3723016016068

40

63

110

180

61

410130

120

110190

740

3100

330

3500

270

29014052

11

13

QM

430

8

2683

36

42

49

125

22

480

120

99

38020040

2717012014050

31

45

78

130

47

28094

93

80120

550

2100

230

2300

190

21010039

8

10

Q.90

49

1

412

5

6

7

52

3

98

25

17

89246

42716287

4

6

11

16

7

3611

13

88

66

170

15

180

16

26146

1

1

Q.80

120

2

516

7

8

9

56

4

110

36

24

120408

53319369

5

7

14

20

9

4013

17

109

83

290

18

320

19

37197

2

2

July

Q.50

230

2

826

11

13

15

66

7

180

53

38

2407812

849305715

8

12

21

30

13

5721

27

1716

130

590

32

650

34

673011

2

3

Q.20

400

4

1240

16

19

22

80

10

260

70

54

35011019

1269509323

11

18

31

43

20

7335

42

3027

190

920

49

1000

64

944717

4

4

QM

300

3

929

12

14

16

69

8

200

58

41

2408514

951337017

9

12

22

32

15

5823

30

1917

140

650

34

710

38

713412

3

3

65

Table 8.--Estimated monthly streamflow characteristics for June an<? Jul y --Continued

Site No.

82

83

84

85

86

87

88

899091

9293

9495

96

97

98

99

100

101

102103

104105106

107108109110111

112113

114

115117

118119

120

121122

123124125126127

Stream name

Twelvemlle Creek at mouth, nearWise River

Sullivan Creek at mouth, nearWise River

Oregon Creek near mouth, nearWise River

California Creek above American.Creek, near Wise River

American Creek at mouth, nearWise River

Slxmlle Creek at mouth, nearWise River

French Creek near mouth, nearWise River

Deep Creek near Wise RiverBear Creek near Wise RiverBryant Creek at mouth, nearWise River

Big Hole River near Wise RiverJohnson Creek at mouth, nearWise River

Meadow Creek near Wise RiverJacobson Creek at mouth, nearWise River

Mono Creek at mouth, nearWise River

Wyman Creek at mouth, near WiseRiver

Lacy Creek at mouth, near WiseRiver

Gold Creek at mouth, near WiseRiver

Pattengall Creek at mouth, nearWise River

Sheep Creek at mouth, near WiseRiver

Wise River near Wise RiverAdson Creek at mouth, near Wise

RiverJerry Creek near Wise RiverDivide Creek at DivideCanyon Creek near Divide


Birch Creek near GlenHells Canyon Creek near Twin

BridgesJefferson River near TwinBridges

Whltetall Creek near WhitehallBoulder River above High Ore

Creek, near Basin

Boulder River near BoulderLittle Boulder River near

BoulderBoulder River above Cabin


Jefferson Island

Jefferson River at SapplngtonSouth Willow Creek near PonyNorth Willow Creek at PonyWillow Creek near HarrlsonNorwegian Creek near Harrlson

Q.90

12

14

2

9

3

3

16

846

10

11005

1174

7

30

21

11

73

13

3308

312138

152412

160036

6913

2000

22120

16025

140

170110

20004223306

Q.80

15

17

2

12

4

3

22

1301013

18007

1592

9

39

26

13

95

17

58010

462951

223019

270046

7916

3100

24180

23037

190

240120

33006031557

June

Q.50

26

29

4

23

8

6

41

2101723

290013

26150

16

67

45

23

160

29

83018

765288

375049

420063

10026

5400

39360

46059

340

420150

5800110539610

Q.20

37

41

5

34

12

9

62

3002434

470019

38210

23

97

65

33

230

42

120027

11078

130

527397

640081

14037

7800

51600

77091

530

650170

870018080

15013

QM

28

31

4

25

9

7

45

2301825

320014

28160

17

73

49

25

170

32

86020

805593

395354

440064

11027

5500

39380

49066

360

450150

600013059

11010

Q.90

4

5

.6

4

1

1

6

4334

2602

422

3

10

7

4

23

5

933

1368

883

44016

375

550

1920

268

31

3849

60010573

Q.80

5

6

.7

5

2

1

8

5345

4503

530

3

14

9

5

32

6

1404

188

12

9104

73019

467

910

2238

4813

52

6455

930128

134

July

Q.50

8

9

1

8

3

2

14

7368

9004

846

5

22

14

7

52

9

2406

291524

131715

140028

6310

2000

2566

8419

83

10071

2100462358* 6

Q.20

12

13

2

12

4

3

22

897

11

14007

1371

7

33

22

11

82

14

3509

362641

182532

210039

8115

3100

28150

19027

170

21086

340080369610

QM

9

10

1

9

3

2

16

7468

9905

951

6

24

16

8

59

10

2606

301726

141818

150030

6611

2100

2594

12020

110

14071

24005025627

66

Table 8.--Estimated monthly streamflow characteristics for June and July--Continued

Site No.

129

130

131

132

133

134

135

136

137

138

139

140

141

142

143

144

145146147148

149150151152153

154

155

156

157158

159160

161162

163

164

165

166

167

168

Stream name

Jefferson River near ThreeForks

Madison River near WestYellowstone

Duck Creek near WestYellowstone

Cougar Creek near WestYellowstone

Grayling Creek near WestYellowstone

Red Canyon Creek near WestYellowstone

South Fork Madison River nearWest Yellowstone

Watkins Creek near WestYellowstone

Trapper Creek near WestYellowstone


Cabin Creek near WestYellowstone

Beaver Creek near WestYellowstone

Elk River at mouth, nearCameron

Soap Creek at mouth, nearCameron

Antelope Creek at mouth, nearCameron 2

West Fork Madison River nearCameron


Madison River near CameronBlaine Spring Creek near CameronO'Dell Creek near EnnisJack Creek near EnnisMoore Creek at Ennis

North Fork Meadow Creek at ForestService boundary, near Ennis

North Fork Meadow Creek athighway, near Ennis

Madison River below Ennis Lake,near McAllister


Madison River near Three ForksCache Creek at mouth, nearWest Yellowstone

Taylor Creek near GraylingPorcupine Creek near Gallatin

GatewayGallatin River above West Fork,near Big Sky



West Fork Gallatin River nearGallatin Gateway



Q.90

2600

530

72

120

210

16

220

28

14

220

140

160

110

6

30

150

393117

170

130036

150926

54

33

1500

2075

160020

29048

1000

120

43

200

61

89

Q.80

3600

630

91

140

280

18

230

32

16

590

180

200

140

7

37

180

454020

220

160041150110

7

71

42

1800

26110

180025

33058

1100

160

54

260

72

110

June

Q.50

6200

850

140

210

430

30

280

51

26

1200

300

290

210

12

58

270

686032

320

25004716015013

110

67

2900

42160

300040

44090

1700

290

94

450

110

170

Q.20

10000

1000

210

320

540

43

320

70

38

1800

370

390

300

18

80

380

997547

430

350051

17019021

140

97

3900

63220

410057

500120

2200

380

120

600

170

240

QM

6900

850

150

230

430

31

280

53

28

1200

300

300

230

13

62

280

736134

330

26004516015014

110

71

3000

45170

310044

42094

1700

290

94

460

120

180

Q.90

630

360

34

27

63

2

140

6

4

660

31

60

31

2

17

70

13147

61

110030120402

21

11

1200

1034

11006

9816

390

34

13

61

23

34

Q.80

1000

420

43

36

94

3

150

9

5

780

47

84

44

2

20

100

17209

87

130033130542

34

17

1400

1346

13008

13022

480

48

19

88

29

45

July

Q.50

1900

520

58

63

160

6

190

15

8

1000

88

120

66

4

26

140

252913

130

160039140714

56

28

1700

1967

170012

19034

710

87

32

150

43

68

Q.20

3200

670

75

120

230

14

220

27

13

1300

150

170

100

6

34

180

383719

190

200043140877

70

41

2400

2594

250019

28050

1000

140

48

220

62

93

QM

2300

530

61

73

170

8

190

18

9

1000

100

130

73

4

28

140

283114

140

160038

140714

58

30

1900

2077

190014

20037

760

97

36

170

46

73

67


Site No.

169

170

171

172

173

174175176177178

179180

181

182

183

184

185186187188

189190191192193

194195196

197198

199200201202

203

204205

206207208

209

210

211

212

213

Stream name

South Fork Spanish Creek nearGallatin Gateway

Spanish Creek near GallatinGateway

Gallatin River near GallatinGateway

Big Bear Creek near GallatinGateway

South Cottonwood Creek nearGallatin Gateway



BelgradeEast Fork Hyalite Creek near

BozemanWest Fork Hyalite Creek near

BozemanHyalite Creek at Hyalite Ranger

Station, near Bozeman

Hyalite Creek above Interstate90, near Bozeman


Manhattan


Crow Creek near RadersburgDry Creek near TostonDeep Creek below North Fork,near Townsend

Duck Creek near TownsendConfederate Gulch near Winston


near East HelenaTrout Creek at mouth, near

East Helena



Tenmile Creek at mouth, nearEast Helena


Beaver Creek at mouth, nearEast Helena



Q.90

84

140

2000

28

76

16035104297

40120

43

80

150

50

273117

430

13007

44110

5400

811345

1524

2314119

25

4166

16189

16

13

15

12

19

Q.80

110

190

2100

44

86

210471347

110

54150

50

88

170

62

323225

560

17001372

1407100

1201757

2133

43151510

30

6385

252711

25

17

17

14

21

June

Q.50

190

320

3200

64

120

410802373

190

98300

61

100

210

99

383544

830

320038

150260

12000

1603292

3351

68282712

48

120140

708521

61

26

23

24

39

Q.20

250

410

4000

82

150

59012037

100270

150530

71

110

260

150

413875

1200

440078

260420

18000

23053

140

5076

110464214

74

200230

11015035

110

35

31

36

63

QM

190

320

3100

62

120

410872676

200

100330

61

100

220

110

373550

900

320046170290

12000

17036

100

3656

74312912

53

130160

769724

69

27

27

26

43

Q.90

29

54

730

12

31

3792

1841

1536

15

25

69

17

30306

220

3400

1828

1800

274

14

610

6257

13

1827

152

5

8

7

4

4

Q.80

40

78

900

15

38

54174

2145

1844

17

33

91

24

31328

290

480.5

2941

2700

345

18

812

10268

15

2835

272

7

11

9

5

4

July

Q.50

66

120

1300

21

53

110297

3467

2891

27

55

130

39

353414

390

9906

5278

4600

539

29

1218

19599

20

4751

8135

14

15

11

9

8

Q.20

94

170

1900

33

75

23044134494

56170

40

84

170

57

373623

500

180016

110160

7000

931751

1728

30151411

29

8883

192212

36

21

18

14

19

QM

72

130

1400

24

57

140318

3474

38110

30

62

130

41

353416

410

1100106496

5100

651134

1321

217

109

22

5757

12176

19

16

13

10

10

68

Table 8. --Estimated monthly streamflow characteristics for June and July-Continued

Site No.

214

217

218

219

220

221

222

223224226

227

228229

230

232

233

234

235

236

237

238239

240

241

242

243

244245

246247

248249

250

251

254

255256257260261

Stream name

Cottonwood Creek above BeartoothRanch, near Wolf Creek

Virginia Creek at mouth, nearCanyon Creek




Wolf Creek at mouth, at WolfCreek

Little Prickly Pear Creek nearWolf Creek





Sheep Creek at mouth, nearCascade

North Fork Smith River at Highway

89, near White Sulphur Springs

South Fork Smith River at mouth,near White Sulphur Springs



Newlan Creek below Charcoal Gulch,near White Sulphur Springs


Smith River near Fort LoganSheep Creek near White Sulphur

SpringsSheep Creek near mouth, nearWhite Sulphur Springs


Rock Creek below Buffalo Canyon,near White Sulphur Springs

Tenderfoot Creek below South Fork,near White Sulphur Springs

Smith River near EdenHound Creek near mouth, near

CascadeMissouri River near UlmNorth Fork Sun River nearAugusta


Willow Creek near Anderson Lake,near Augusta



Ford Creek near AugustaElk Creek near AugustaSun River at SimmsMissouri River near Great FallsDry Fork at mouth, at Monarch

Q.90

6

22

44

48

19

20

70

88

42

34

14028

68

31

28

72

37

13

27

12049

130

22

42

85

36083

4500720

1300360

14

8

34

2998

4206300

51

Q.80

7

30

58

61

23

25

95

151461

56

30052

110

48

39

98

65

18

32

18063

190

28

54

120

530120

7200830

1900690

17

9

43

45190710

850066 .

June

Q.50

14

77

170

160

41

45

190

3431

110

120

710120

220

160

82

190

270

35

58

390100

350

53

94

220

920220

120001300

30001300

30

16

69

62310

140015000

110

Q.20

24

130

330

310

61

74

300

5651

170

170

1100160

310

340

130

330

410

52

96

540160

530

84

140

330

1400360

180002000

47002900

48

24

110

110490

320021000

170

QM

16

85

190

180

45

51

220

3835

130

130

810130

230

190

88

220

260

38

65

390110

380

58

100

240

1100260

130001400

33001800

33

17

86

81340

210016000

130

Q.90

1

5

6

6

6

5

51

00

15

13

5611

33

9

10

23

14

5

7

8122

41

6

15

33

9627

3100260

39071

3

3

25

273266

390015

Q.80

2

7

8

13

8

6

62

00

19

17

8917

53

13

13

31

23

7

8

10030

62

8

21

48

19041

4000310

680160

4

3

30

315296

490021

July

Q.50

3

15

24

31

13

11

92

66

33

31

18034

80

23

25

49

63

13

15

17041

100

13

31

72

37075

6600460

1000250

8

5

47

4078

2707800

37

Q.20

6

31

64

69

23

24

160

131353

53

34061

97

40

42

76

100

23

32

23055

160

24

49

99

740120

10000700

1700480

15

8

59

56150600

1200060

QM

4

20

35

43

16

14

110

87

36

36

21042

84

25

29

51

79

16

19

19043

110

15

35

76

45082

7300500

1200330

9

6

48

44100420

850042

69

Table 8.--Estimated monthly streamflow characteristics for June and July--Continued

Site No.

262

263

264

265266

267268

269270

271

273

274

278

279

280

281

282283284285

286287

288290291

292

293

294295296

297298299

301

303

306

307

309

310

311

Stream name

Tillinghast Creek above JoiceCreek, near Monarch

Pilgrim Creek at mouth, nearMonarch

Logging Creek at Logging CreekCampground, near Monarch




Creek, near HighwoodMissouri River at Fort BentonShonkin Creek below Bishop Creek,

near HighwoodSouth Fork Two Medicine Rivernear East Glacier


North Fork Badger Creek nearBrowning

Birch Creek at Swift Dam, nearValier












Lost Creek at mouth, near UticaYogo Creek at mouth, near UticaMiddle Fork Judith River near

UticaSouth Fork Judith River at IndianHill Campground, near Utica


East Fork Big Spring Creek atmouth, near Lewis town

Big Spring Creek aboveCottonwood Creek, nearHanover




Q.90

26

31

19

25014

25036

680025

92

120

100

110

17

23

47

31310280

1100

12001400

5703614

30

28

1564

7800

3618

120

18

77

35

170

27

21

220

Q.80

33

45

25

33017

39047

900035

120

140

130

270

21

29

60

55370350

1300

15001700

7505915

37

35

22140

12000

4720

160

24

100

46

210

37

27

310

June

Q.50

54

79

40

57029

71078

1600061

240

210

190

370

36

48

120

99470510

2200

25002900

15009916

61

57

39320

18000

7936

220

42

190

83

260

73

49

460

Q.20

80

120

60

100050

1700130

23000100

380

300

270

630

52

68

200

220680810

3600

43005000

260014017

87

83

60560

26000

12059

350

74

300

130

320

120

79

680

QM

60

88

44

70033

110088

1700070

260

230

210

500

39

52

130

140530600

2800

32003800

190010016

66

63

43420

20000

8641

250

48

210

96

280

87

56

540

Q.90

11

11

10

756

5712

390010

25

31

28

150

6

7

10

197478

310

320370

4602111

9

9

732

4400

123

25

5

23

10

140

7

9

150

Q.80

15

14

13

1107

8515

520012

35

43

39

170

7

10

13

25130110460

490570

6803212

12

12

1164

5600

164

34

5

33

14

160

10

11

190

July

Q.50

22

23

17

20010

15023

790018

59

65

59

240

11

15

27

43170190730

790920

13004813

19

18

17140

10000

268

66

9

62

26

190

20

16

260

Q.20

30

37

21

32014

33036

1200026

95

100

91

430

17

22

55

97260350

1300

15001700

20008215

29

27

30270

14000

402090

15

100

45

210

35

25

330

QM

24

27

18

22011

22025

880018

63

71

65

300

13

16

34

62190230950

10001200

13006113

21

20

20170

10000

291069

10

67

30

190

23

18

270

70


Site No.

312

313315

316317

318

319

320

321

322

323

324

325326330

331

333335

338339

340341

Stream name

Warm Springs Creek above MeadowCreek, near Hilger

Judith River near WinifredCow Creek below forks, near

ClevelandMissouri River near LanduskyNorth Fork Musselshell River

near Delpine




Alabaugh Creek at mouth, nearLennep



Big Elk Creek at mouth, atTwo dot

Musselshell River at HarlowtonAmerican Fork near HarlowtonCareless Creek below LittleCareless Creek, nearHedgesville


Musselshell River near RoundupFlatwillow Creek below the forks,

near Grass RangeMusselshell River near MosbyBig Dry Creek above Little Dry


Little Dry Creek near Van NormanBig Dry Creek near Van Norman

Q.90

94

25012

840010

10

21

31

18

73

94

16

87.1

6

7

13090

70.1

12

Q.80

100

30016

1300014

12

30

39

25

110

140

29

15027

9

200120

1501

23

June

Q.50

110

55028

2000027

23

58

70

49

200

290

55

4601113

17

520200

59014

1428

Q.20

120

72040

2900041

36

93

120

76

310

510

98

7707024

27

1000300

180080

55140

QM

110

55030

2200029

25

68

78

54

220

340

62

5105615

19

720220

100043

3477

Q.90

98

2605

50006

3

8

11

6

28

19

3

4802

2

9412

140

.3

.4

Q.80

100

3206

62008

4

11

14

8

40

28

5

67.3

2

3

12017

51.5

11

July

Q.50

110

56011

1100013

6

20

22

14

61

66

11

14023

4

22043

1404

59

Q.20

110

67016

1500023

11

29

37

22

85

120

23

21095

8

33089

50025

2247

QM

110

55012

1200015

7

21

25

15

65

78

15

17053

5

29051

35031

2657




**Stream is known to be dry except for periods of runoff. Calculated flows were adjusted bysubtracting 7 cubic feet per second.


71

Table 9.--Estimated monthly streamflow characteristics for August and September


AugustSite No.

1

2345

6

789

10

1112

13

14

15

16

1718

1920

21

2223

2425

26

27

282930

32

33

34

35

36

3738

39

40

41

Stream name

Hellroaring Creek nearLakeview




Ranch, near LakeviewFeet Creek at county road,near Lakeview





Creek, near Lima

















near DillonBlacktail Deer Creeknear Dillon


Q.90

10

1.2

141

.3

81

20

1

41

110

.6

.9

1

334

1002

.7

2.6

313

30

.4

325

1

1

1

.7

12

23016

5

30

49

Q.80

11

1.2

171

.3

91

27

1

51

160

.6

1

1

451

1202

.8

2.7

416

34

.5

326

1

1

1

.8

16

29018

7

40

65

Q.50

16

2.3

222

.6

122

46

2

62

260

1

2

2

663

1503

1

31

520

44

.8

539

2

2

2

1

26

44023

11

46

150

Q.20

21

3.4

282

.8

163

76

2

83

310

1

2

2

981

2404

2

32

626

55

1

64

13

3

3

3

2

38

74029

16

58

260

QM

16

2.3

232

.6

132

53

2

62

240

1

1

2

665

1803

1

31

521

45

.8

53

10

2

2

2

1

28

53024

11

48

210

Q.90

8

1.2

12.6

.2

6.7

20

.7

3.9

33

.3

.5

.6

232

1702

.5

1.4

310

26

.3

214

.8

1

.8

.5

11

18014

4

32

130

September

Q.80

9

1.2

14.7

.2

71

32

1

31

52

.4

.6

.7

340

1902

.6

1.5

313

28

.3

226

1

1

1

.5

12

24016

6

37

150

Q.50

11

1.2

161

.4

81

47

1

42

140

.6

.8

1

451

2302

1

2.7

416

36

.5

327

1

2

1

.7

17

36020

8

43

330

Q.20

14

2.3

201

.5

112

69

2

52

250

.9

1

1

664

2903

1

31

521

50

.8

43

11

2

3

2

1

28

51024

11

52

450

QM

12

1.2

181

.4

91

49

1

52

150

.7

1

1

552

2503

1

2.9

417

39

.6

428

2

2

1

.8

20

41020

8

44

360

72

Table 9.--Estimated monthly streamflow characteristics for August and 5eptember--Continued

AugustSite No. Stream name

42 Beaverhead River nearTwin Bridges

43 Corral Creek at mouth,near Alder

44 Coal Creek at mouth,near Alder

45 Ruby River above the forks,near Alder

46 East Fork Ruby River at mouth,near Alder

47 West Fork Ruby River at mouth,near Alder

48 Cottonwood Creek at mouth,near Alder

49 Warm Springs Creek at mouth,near Alder 1

50 North Fork GreenhornCreek at mouth, near Alder

51 Ruby River above reservoir,near Alder

52 Mill Creek at Forest Serviceboundary, near Sheridan

53 Wisconsin Creek at ForestService boundary, nearSheridan

54 Ruby River near Twin Bridges55 Big Hole River near Jackson56 Andrus Creek near mouth,

near Jackson

57 Fox Creek at mouth, nearJackson

58 Governor Creek near Jackson59 Warm Springs Creek at Jackson60 Miner Creek near Jackson61 Big Lake Creek near mouth,

near Wisdom

62 Steel Creek above FrancisCreek, near Wisdom

63 Francis Creek at mouth,near Wisdom

64 Steel Creek near mouth,near Wisdom

65 Swamp Creek near mouth,near Wisdom

66 Joseph Creek at mouth,near Wisdom

67 Trail Creek near Wisdom68 Ruby Creek at mouth,

near Wisdom69 Tie Creek at Forest Service

boundary, near Wisdom70 Johnson Creek near Wisdom71 Mussigbrod Creek near Wisdom

72 North Fork Big Hole Rivernear mouth, near Wisdom

73 Big Hole River below NorthFork, near Wisdom

74 Pintlar Creek near ForestService boundary, near Wisdom

75 Big Hole River below MuddCreek, near Wisdom

76 Fishtrap Creek at mouth,near Wise River

77 Lamarche Creek near Wise River78 Seymour Creek near Wise River79 Tenmile Creek at mouth,

near Wise River80 Sevenmile Creek at mouth,

near Wise River81 Corral Creek at mouth, near

Wise River

Q.90

80

.8

2

7

3

4

4

47

2

76

12

8

66144

3

169

135

3

4

7

9

4

196

8

44

34

86

7

93

8

1394

.8

1

Q.80

100

1

3

9

4

5

5

49

3

97

14

10

100174

3

1910145

3

4

8

11

5

217

9

55

41

130

9

140

10

18 '

104

1

1

Q.50

200

2

4

14

6

7

8

54

4

120

21

14

140227

5

2314178

4

6

10

13

7

249

14

76

52

190

11

200

12

24156

2

2

Q.20

330

2

6

19

8

9

11

59

5

150

29

20

1902910

6

30182211

5

8

13

17

9

3212

18

98

71

280

15

300

16

32208

2

2

QM

260

2

5

14

6

7

8

54

4

120

22

15

140237

5

2514198

4

6

10

14

7

269

14

77

55

210

12

220

13

25156

2

2

Q.90

190

.6

2

6

3

3

4

46

2

84

9

6

140133

2

12764

2

3

5

6

3

134

6

33

25

83

5

93

6

1173

.6

.7

September

Q.80

220

.7

2

8

3

4

4

48

2

91

10

7

150144

2

15874

2

3

6

8

4

165

7

44

32

93

6

100

7

1383

.7

.8

Q.50

410

1

3

10

4

5

6

50

3

110

13

9

190175

3

191196

3

5

8

10

5

207

10

55

41

130

8

140

9

17114

1

1

Q.20

570

2

4

15

6

7

8

54

4

140

17

12

280237

5

2514138

4

6

10

14

6

259

13

76

56

200

11

240

13

23145

1

2

QK

440

1

4

12

5

6

6

51

3

110

14

10

210186

4

2011107

3

5

8

11

5

207

11

65

44

160

9

170

10

19124

1

1

73

Table 9.--Estimated monthly streamflow characteristics for August and September--Continued

Augus tSite No. Stream name

82

83

84

85

86

87

88

899091

92

93

9495

96

97

98

99

100

101

102103

104105106

107108109110111

112113

114

115

117

118119

120

121122

123124125126127









Big Hole River near WiseRiver




near Wise River

Wyman Creek at mouth, nearWise River

Lacy Creek at mouth, nearWise River

Gold Creek at mouth, nearWise River


Sheep Creek at mouth, nearWise River

Wise River near Wise RiverAdson Creek at mouth, near

Wise RiverJerry Creek near Wise RiverDivide Creek at DivideCanyon Creek near Divide



Twin BridgesJefferson River near

Twin BridgesWhitetail Creek nearWhitehall

Boulder River above High OreCreek, near Basin

Boulder River near BoulderLittle Boulder River near

BoulderBoulder River above Cabin


Jefferson Island


Q.90

3

3

.4

2

.8

.6

4

2522

130

1

313

2

6

4

2

14

3

562

834

552

24010

133

310

20

9

124

16

2025

2505333

Q.80

3

3

.5

3

1

.7

5

2923

190

2

315

2

8

5

3

17

3

722

1046

663

34014

183

520

22

12

155

20

2528

4107444

Q.50

5

5

.8

5

2

1

8

3634

290

3

521

3

11

8

4

25

5

893

1358

784

49017

285

770

28

20

258

30

3832

6908687

Q.20

6

6

1

7

2

2

12

4746

420

4

728

4

15

10

5

35

7

1204

177

10

9107

70021

376

1100

33

35

4512

50

6137

12001410189

QM

5

5

.8

5

2

1

9

3935

310

3

522

3

12

8

4

26

5

933

1468

784

52017

285

840

27

24

3110

36

4532

790107

118

Q.90

2

2

.3

2

.6

.5

4

2012

130

1

210

1

5

3

2

12

2

441

633

441

2408

82

580

10

10

125

17

2115

5604345

September

Q.80

2

2

.3

3

.8

.6

5

2422

140

1

312

1

6

4

2

14

3

502

834

552

26010

103

710

13

13

176

22

2717

710'

5355

Q.50

3

3

.5

4

1

.8

7

3023

190

2

314

2

8

5

3

19

3

632

1045

663

34012

123

1000

17

20

269

32

3923

110086

137

Q.20

4

4

5

2

1

9

3934

300

3

519

3

11

7

4

26

5

863

1257

775

56015

164

1300

21

33

4216

47

5829

180021133410

QM

3

4

.7 .6

4

1

1

7

3224

240

2

416

2

9

6

3

21

4

693

1046

663

41012

134

1000

18

24

3011

36

4423

1200128

207

74

Table 9.--Estimated monthly streamflow characteristics for August and September Continued

AugustSiteWo. Stream name

129

130

13!

132

133

134

135

136

137

138

139

140

141

142

143

144

14514614?146

149ISO

151152133

134

153

136

157156

159

160

161162

163

164

163

166

167

168






Bed Canyon Creek nearWest Yellowstone








Soap Creek at mouth.near Cameron


West Fork Madison River nearCameron


Madison River near CameronBlaine Spring Creek near

CameronO'Dell Creek near EnnisJack Creek near EnnisMoore Creek at Ennis

North Fork Meadow Creekat Forest Service boundary,near Ennis








Pork, near Big Sky






Q.90

450

330

23

12

26

.9

110

3

2

800

12

30

19

1

15

44

874

29

100025

11023

1

10

6

1200

620

1000

4

428

250

17

7

32

15

21

Q.80

540

370

27

15

33

1

120

4

3

910

16

36

21

2

16

55

995

36

120026

11026

1

13

8

1400

823

1200

4

499

270

21

9

39

18

24

Q.50

850

440

33

21

46

2

130

5

4

1100

21

51

29

2

19

67

12126

50

130029

120332

31

15

1600

1335

1500

6

6513

320

28

12

52

23

32

Q.20

1400

510

411 29

69

2

140

7

5

1200

32

70

38

3

22

84

16178

70

150035

120412

43

20

1800

1548

1700

8

8918

390

40

17

72

28

41

QM

1000

440

35

22

50

2

130

5

4

1100

23

54

30

2

19

69

13136

53

130030

120342

29

14

1600

1236

1500

6

6814

330

31

13

56

24

33

Q.90

790

340

22

9

19

.5

100

2

2

690

8

25

14

1

14

43

763

24

100023

11021

.8

8

4

1200

619

1200

3

306

210

14

6

27

15

19

September

Q.80

890

380

24

11

23

.6

110

2

2

890

11

28

16

1

15

46

764

27

120025

11022

1

10

6

1300

722

1300

3

327

220

16

7

31

16

21

Q.50

1300

420

29

14

30

.8

120

3

3

1200

13

35

20

1

16

57

984

34

140026

11027

1

15

8

1700

828

1600

4

409

280

22

9

42

19

26

Q.20

1800

490

35

18

40

1

130

4

3

1400

18

44

25

2

19

64

11106

43

160028

120322

21

11

2000

1136

1800

5

4911

320

30

12

55

23

33

QM

1300

430

30

15

33

1

120

3

3

1200

15

37

21

2

17

56

995

36

140026

11027

1

16

9

1700

929

1600

5

429

280

24

10

44

20

27

75

Table 9.--Estimated monthly streamflow characteristics for August and Sept ember Continued

Augus tSite No. Stream name

169

170

171

172

173

174175176177178

179180

181

182

183

184

185186187188

189190

191192193

194195196

197198

199200201202

203

204205

206207208

209

210

211

212

213





South Cottonwood Creek nearGallatin Gateway



BelgradeEast Fork Hyalite Creeknear Bozeman





Manhattan

Gallatin River near LoganSixteenmile Creek near

RinglingSixteenmile Creek near MaudlowSixteenmile Creek near TostonMissouri River near Toston

Crow Creek near RadersburgDry Creek near TostonDeep Creek below North Fork,near Towns end

Duck Creek near Towns endConfederate Gulch near Winston


near East HelenaTrout Creek at mouth,near East Helena

Prickly Pear Creek near ClancyPrickly Pear Creek at mouth,near East Helena

Tenmi le Creek near RiminiTenmi le Creek near HelenaSevenmile Creek near mouth,near Helena

Tenmi le Creek at mouth,near East Helena





Q.90

16

30

460

6

19

367.8

1227

725

6

11

35

9

28295

160

3300

1217

1400

1338

46

2136

11

1319

.4

.31

3

7

4

2

3

Q.80

19

36

510

8

21

43102

1429

827

6

13

45

11

30306

180

3900

1421

1800

153

10

57

4146

11

1522

.5

.61

4

7

4

3

3

Q.50

25

49

600

9

25

55143

2045

1244

10

17

84

21

32328

220

480.8

3036

2400

235

14

710

6258

15

2932

122

6

11

7

5

4

Q.20

34

67

730

13

31

78215

2560

1866

12

23

100

27

353411

280

6705

4857

3300

327

18

813

8379

17

4440

383

12

14

11

7

6

QM

27

52

620

10

26

60164

2049

1451

9

18

78

20

32329

230

5303

3239

2600

245

15

710

6258

15

3033

252

7

11

8

5

4

Q.90

13

26

390

5

17

5391

1035

532

5

10

29

7

27295

160

4700

1518

2400

1228

35

2.8

36

12

1621

.3

.81

2

8

4

2

2

September

Q.80

15

30

420

6

18

64102

1242

735

6

12

34

8

29296

170

5601

1621

2600

1439

46

2136

12

1722

.511

3

8

5

3

2

Q.50

20

40

520

7

21

86133

1752

950

8

15

46

11

32317

200

7403

2429

3400

173

11

58

4147

14

2428

132

5

10

6

4

3

Q.20

26

51

610

8

25

1101841960

1271

10

17

60

16

353311

240

9204

4046

4600

236

14

710

6258

15

3735

373

9

13

12

5

4

QM

21

41

520

7

21

87153

1652

1155

8

14

50

13

32318

200

7403

2833

3500

184

12

58

4258

13

2729

252

6

11

8

4

3

76

Table 9.--Estimated monthly streamflow characteristics for August and 5eptember--Continued

Augus tSite No . Stream name

214

217

218

219

220

221

222

223224226

227

228229

230

232

233

234

235

236

237

238239

240

241

242

243

244245

246247

248249

250

251

254

255256257260

261

Q.90

Cottonwood Creek above Beartooth 1Ranch, near Wolf Creek





Wolf Creek at mouth, atWolf Creek





Dearborn River near CraigFlat Creek above Slew Creek,

near CraigSheep Creek at mouth, nearCascade

North Fork Smith River atHighway 89, near WhiteSulphur Springs

South Fork Smith River atmouth, near White SulphurSprings





Smith River near Fort LoganSheep Creek near White

Sulphur SpringsSheep Creek near mouth, nearWhite Sulphur Springs





near CascadeMissouri River near UlmNorth Fork Sun River nearAugusta


Willow Creek near AndersonLake, near Augusta





3

3

2

3

3

20

008

7

175

17

6

5

15

5

3

4

4114

21

3

, 9

18

5816

2300100

76064

2

2

6

122055

3200

8

Q.80

1

3

4

3

4

3

27

00

10

9

337

24

8

7

19

8

3

5

5518

29

4

12

24

8322

2700130

84073

3

2

8

152687

3800

11

Q.50

2

4

5

5

7

5

54

00

14

13

6813

36

12

12

27

22

8

8

10023

41

6

16

33

14036

4100160

110086

4

3

12

1937

1505100

16

Q.20 QM

2

7

8

13

9

8

97

00

20

18

10021

56

21

16

39

40

13

11

13030

62

8

22

47

23049

5900210

1300140

5

4

17

2749

2407200

23

2

5

6

8

7

6

76

00

15

14

7014

38

13

11

29

20

8

8

9523

44

6

17

35

16037

4300160

1100110

4

3

13

2038

1705400

17

Q.90

.6

4

5

13

3

2

30

006

5

204

14

4

8

11

16

3

3

9012

17

2

8

15

6215

250090

24054

2

2

4

122049

3300

7

September

Q.80

.8

5

6

15

4

3

36

008

7

326

19

6

9

15

18

3

4

9814

23

3

10

19

8517

310095

26064

2

3

6

142368

3800

9

Q.50

i 1

7

10

21

6

4

59

00

11

9

529

26

9

11

22

25

6

6

11018

30

4

12

25

12025

4200110

370100

3

3

9

1730

1204900

12

Q.20

2

11

15

27

7

6

84

00

15

14

7514

36

13

14

29

32

9

9

12022

42

6

16

34

19033

5300140

540130

4

3

16

2138

1806300

19

QM

1

8

10

21

6

5

63

00

12

11

5610

28

9

12

22

25

6

7

11018

33

5

13

27

15026

4300120

390110

3

3

11

1831

1305100

14

77

Table 9.--Estimated monthly atreamflow characteristics for August and September--Continued

Site No.

262

263

264

265266

267268

269

270

271

273

274

278

279

280

281

282283284285

286287

288290291

292

293

294295296

297298299

301

303

306

307

August

Stream name



Logging Creek at Logging CreekCampground, near .Monarch




Creek, near HighwoodMissouri River at

Fort BentonShonkin Creek below Bishop
















Lost Creek at mouth, near UticaYogo Creek at mouth, near UticaMiddle Fork Judith River

near UticaSouth Fork Judith River at



East Fork Big Spring Creekat mouth, near Lewistown


Q.90

7

6

7

362

167

3200

6

17

19

17

9

4

5

6

123829

150

150180

350179

6

6

516

3500

714

3

12

6

120

Q.80

9

7

8

564

279

3800

7

22

21

19

21

4

5

7

144935

190

190220

540229

7

6

645

4300

925

4

16

8

130

Q.50

12

11

11

796

5411

5200

9

34

28

26

98

6

8

8

206366

310

320370

9803011

10

9

1167

5800

13214

4

23

13

160

Q.20

16

16

14

1208

9115

6900

11

52

36

33

160

8

10

12

3390

110480

510590

16004312

13

12

16120

8100

183

31

5

34

18

170

QM

13

12

11

877

5912

5400

10

36

28

26

100

6

8

10

236977

350

360420

11003311

10

9

1280

6200

142

18

4

25

13

160

Q.90

6

5

6

361

146

3300

4

13

14

13

53

3

3

7

132426

130

130150

330199

4

4

626

3900

6.5

2

2

9

6

120

September

Q.80

8

7

7

472

187

3700

5

17

15

14

59

3

4

8

163640190

190220

4202010

5

5

739

4300

7.7

3

2

12

6

120

Q.50

10

9

9

635

359

4900

7

28

18

17

91

4

5

12

284451

280

290330

7202410

6

6

959

5400

102

11

3

16

9

140

Q.20

14

13

12

1006

6012

6300

9

36

23

22

170

6

7

16

5060

100480

500590

11002912

9

8

1490

7100

13319

4

24

12

150

QM

11

10

10

745

4210

5200

6

27

20

18

110

5

5

13

375567

330

340400

8802511

7

7

1169

5900

112

12

4

19

10


309

310

311




4

3

120

5

5

140

7

8

180

11

13

210

8

10

180

3

2

110

4

3

120

5

6

150 *

9

8

170

7

7

150

78

Table 9.--Estimated monthly streamflow characteristics for August and September Continued

AugustSite No. Stream name

312

313315

316317

318

319

320

321

322

323

324

325326330

331

333335

338339

340341




near Delpine








Musselshell River at HarlowtonAmerican Fork near HarlowtonCareless Creek below LittleCareless Creek, nearHedgesville


Musselshell River near RoundupFlatwillow Creek *below the

forks, near Grass RangeMusselshell River near MosbyBig Dry Creek above Little

Dry Creek, near Van Norman

Q.90

100

2403

39003

2

5

6

3

J5

6

.9

2201

1

324

50

Little Dry Creek near Van Norman .1Big Dry Creek near Van Norman .1

Q.80

100

2504

47004

2

6

8

4

20

12

1

3601

1

705

200

.3

.3

Q.50

110

4806

66009

3

10

13

6

27

21

3

84.5

2

2

1808

872

24

Q.20

110

6709

870013

4

14

18

9

39

44

7

13022

2

27016

2206

814

QM

110

4707

68009

3

10

13

6

29

27

4

8312

2

17010

1207

916

Q.90

100

2403

43004

1

4

5

2

12

5

.5

130.7

.7

403

90

00

September

Q.80

110

2403

46004

2

5

7

3

15

10

1

3501

1

484

200

.1

.1

Q.50

110

4704

59008

2

7

10

4

20

21

5

65.7

1

1

1106

73.5

12

Q.20

110

6406

770011

3

9

14

6

28

36

10

10022

2

19010

1804

59

QM

110

4405

64008

2

7

11

5

22

25

6

70.91

2

1207

1309

1019




**Stream is known to be dry except for periods of runoff. Calculated flows were adjusted bysubtracting 7 cubic feet per second.

5 Streara is known to be dry except for periods of runoff. Calculated flows were adjusted bysubtracting 8 cubic feet per second.

79

Table 10.--Estimated mean annual strfiamflow

[ft-^s, cubic feet per second; --, not applicable]

Site No.

12345

6789

10

1112131415

1617181920

2122232425

2627282930

3233343536

3738394041

4243444546

4748495051

5253

545556

Stream name

Hellroaring Creek near LakeviewCorral Creek near LakeviewAntelope Creek near LakeviewRed Rock Creek near LakeviewTom Creek near Lakeview

Narrows Creek at mouth, near LakeviewOdell Creek near LakeviewJones Creek near LakeviewRed Rock River near Kennedy Ranch, near LakeviewPeet Creek at county road, near Lakeview

Long Creek near LakeviewEast Fork Clover Creek at mouth, near MonidaRed Rock River below Lima Reservoir, near MonidaCabin Creek above Simpson Creek, near LimaIndian Creek above Simpson Creek, near Lima

Simpson Creek above Indian Creek, near LimaDeadman Creek near DellBig Sheep Creek below Muddy Creek, near DellRed Rock River at Red RockBlack Canyon Creek near Grant

Shennon Creek near mouth, near GrantFrying Pan Creek near GrantTrapper Creek at mouth, near GrantBear Creek near GrantBloody Dick Creek near Grant

Horse Prairie Creek near GrantRape Creek above reservoir, near GrantPainter Creek near GrantBrowns Canyon Creek near GrantMedicine Lodge Creek near Grant

Pole Creek near mouth, near PolarisReservoir Creek at mouth, near PolarisEast Fork Dyce Creek at mouth, near PolarisWest Fork Dyce Creek at mouth, near PolarisGrasshopper Creek near Dillon

Beaverhead River at BarrettsEast Fork Blacktail Creek near DillonWest Fork Blacktail Creek near DillonBlacktail Deer Creek near DillonBeaverhead River near Dillon

Beaverhead River near Twin BridgesCorral Creek at mouth, near AlderCoal Creek at mouth, near AlderRuby River above the forks, near AlderEast Fork Ruby River at mouth, near Alder

West Fork Ruby River at mouth, near AlderCottonwood Creek at mouth, near AlderWarm Springs Creek at mouth, near AlderNorth Fork Greenhorn Creek at mouth, near AlderRuby River above reservoir, near Alder

Mill Creek at Forest Service boundary, near SheridanWisconsin Creek at Forest Service boundary, near

SheridanRuby River near Twin BridgesBig Hole River near JacksonAndrus Creek near mouth, near Jackson

Stream- f low-

gaging station

No.

_ _--------

__----

06011000--

__--

06012500----

__--

0601350006014500

--

__-----_--

06015000--------

_ _------

06015500

06016000--_-

0601750006018000

06018500__------

_ ___--__

06019500

__--

0602300006023500

--

Mean annual streamflow (ft3/s)

222.7

313

.9182

1302

93

15011

28

60240

5

1419

44

84185

21

3321

52

450351355

370

44027

2410

1214646

180

3124

2104712

80

Table 10. --Estimated mean annual streamf1 ow--Continued

SiteNo.

5758596061

6263646566

6768697071

727374

7576

7778798081

82838485

86

8788899091

9293949596

979899

100101

102103104105106

107108109110111

Stream name

Fox Creek at mouth , near JacksonGovernor Creek near JacksonWarm Springs Creek at JacksonMiner Creek near JacksonBig Lake Creek near mouth, near Wisdom

Steel Creek above Francis Creek, near WisdomFrancis Creek at mouth, near WisdomSteel Creek near mouth, near WisdomSwamp Creek near mouth, near WisdomJoseph Creek at mouth, near Wisdom

Trail Creek near WisdomRuby Creek at mouth, near WisdomTie Creek at Forest Service boundary, near WisdomJohnson Creek near WisdomMussigbrod Creek near Wisdom

North Fork Big Hole River near mouth, near WisdomBig Hole River below North Fork, near WisdomPintlar Creek near Forest Service boundary,

near WisdomBig Hole River below Mudd Creek, near WisdomFishtrap Creek at mouth, near Wise River

Lamarche Creek near Wise RiverSeymour Creek near Wise RiverTenmile Creek at mouth, near Wise RiverSevenmile Creek at mouth, near Wise RiverCorral Creek at mouth, near Wise River

Twelvemile Creek at mouth, near Wise RiverSullivan Creek at mouth, near Wise RiverOregon Creek near mouth, near Wise RiverCalifornia Creek above American Creek, nearWise River

American Creek at mouth, near Wise River

Sixmile Creek at mouth, near Wise RiverFrench Creek near mouth, near Wise RiverDeep Creek near Wise RiverBear Creek near Wise RiverBryant Creek at mouth, near Wise River

Big Hole River near Wise RiverJohnson Creek at mouth, near Wise RiverMeadow Creek near Wise RiverJacobson Creek at mouth, near Wise RiverMono Creek at mouth, near Wise River

Wyiran Creek at mouth, near Wise RiverLacy Creek at mouth, near Wise RiverGold Creek at mouth, near Wise RiverPattengail Creek at mouth, near Wise RiverSheep Creek at mouth, near Wise River

Wise River near Wise RiverAdson Creek at mouth, near Wise RiverJerry Creek near Wise RiverDivide Creek at DivideCanyon Creek near Divide


Stream- f low-

gaging station

No.

..----

06024000--

__--------

06024500--------

__----

----

_ _--------

__------

--

_ _--------

06024580--------

---_----

06024590----__--

_ _----

0602550006025800


849323314

812213512

7824252029

15054055

59044

50281022

7817

2

1147047

82048

424

20137

488

1805

221320

121410

1 ,20018

81

Table 10. --Estimated mean annual streamf1 ow--Continued

Site No.

1 121131 141151 17

118119120121122

123124125126127

129130131132133

134135136137138

139140141142143

144145146147148

149150151152153

154

155156157158

159160161162163

164

165

166167168

Stream name

Birch Creek near GlenHells Canyon Creek near Twin BridgesJefferson River near Twin BridgesWhitetail Creek near WhitehallBoulder River above High Ore Creek, near Basin

Boulder River near BoulderLittle Boulder River near BoulderBoulder River above Cabin Gulch, near BoulderBoulder River near CardwellSouth Boulder River near Jefferson Island


Jefferson River near Three ForksMadison River near West YellowstoneDuck Creek near West YellowstoneCougar Creek near West YellowstoneGrayling Creek near West Yellowstone

Red Canyon Creek near West YellowstoneSouth Fork Madison River near West YellowstoneWatkins Creek near West YellowstoneTrapper Creek near West YellowstoneMadison River below Hebgen Lake, near Grayling

Cabin Creek near West YellowstoneBeaver Creek near West YellowstoneElk River at mouth, near CameronSoap Creek at mouth, near CameronAntelope Creek at mouth, near Cameron

West Fork Madison River near CameronSquaw Creek near CameronStandard Creek near CameronRuby Creek near CameronIndian Creek near Cameron

Madison River near CameronBlaine Spring Creek near CameronO'Dell Creek near EnnisJack Creek near EnnisMoore Creek at Ennis

North Fork Meadow Creek at Forest Service boundary,near Ennis

North Fork Meadow Creek at Highway 287, near EnnisMadison River below Ennis Lake, near McAllisterHot Springs Creek near NorrisCherry Creek near Norris

Madison River near Three ForksCache Creek at mouth, near West YellowstoneTaylor Creek near GraylingPorcupine Creek near Gallatin GatewayGallatin River above West Fork, near Big Sky

South Fork West Fork Gallatin River nearGallatin Gateway

Middle Fork West Fork Gallatin River nearGallatin Gateway

West Fork Gallatin River near Gallatin GatewaySquaw Creek near Gallatin GatewayHellroaring Creek near Gallatin Gateway

Stream- f low-

gaging station

No.

06026000--

0602650006029000

--

06033000----__

06034000

06034500----

0603500006035500

0603665006037500

------

__------

06038500

--------

06039200--------

0604000006040010

--06040300

--

__

--06041000

----

06042500--

06043000----

_ _

--

------


287

1 ,90012

100

13021

11014034

2,2003519407

2,300510495196

6140

1 17

1 ,000

5879603

25

9519179

84

1 ,40028120413

30

181 ,800

1452

1 ,800129423

450

62

22

1103650

82

Table 10.--Estimated mean annual streamflow - -Continued

SiteNo.

169170171172173

174175176177178

179180181182183

184185186187188

189190191192193

194195196197198

199200201202203

204205206207208

209210211212213

214

217218219220

221222223224226

Stream name

South Fork Spanish Creek near Gallatin GatewaySpanish Creek near Gallatin GatewayGallatin River near Gallatin GatewayBig Bear Creek near Gallatin GatewaySouth Cottonwood Creek near Gallatin Gateway

Baker Creek near ManhattanRocky Creek near BozemanBear Canyon Creek near BozemanSourdough Creek near BozemanEast Gallatin River at Bozeman

Bridger Creek near BozemanEast Gallatin River near BelgradeEast Fork Hyalite Creek near BozemanWest Fork Hyalite Creek near BozemanHyalite Creek at Hyalite Ranger Station,

near Bozeman

Hyalite Creek above Interstate 90, near BozemanThompson Creek near BelgradeBen Hart Creek near BelgradeReese Creek near BelgradeEast Gallatin River near Manhattan

Gallatin River near LoganSixteenmile Creek near RinglingSixteenmile Creek near MaudlowSixteenroile Creek near TostonMissouri River near Toston

Crow Creek near RadersburgDry Creek near TostonDeep Creek below North Fork, near TownsendDuck Creek near TownsendConfederate Gulch near Winston

Beaver Creek near WinstonAvalanche Gulch near WinstonSpokane Creek near East HelenaMcGuire Creek at county road, near East HelenaTrout Creek at mouth, near East Helena

Prickly Pear Creek near ClancyPrickly Pear Creek at mouth, near East HelenaTenmile Creek near RiminiTenmile Creek near HelenaSevenmile Creek near mouth, near Helena

Tenmile Creek at mouth, near East HelenaSilver Creek at Interstate 15, near HelenaBeaver Creek at mouth, near East HelenaElkhorn Creek near mouth, near Wolf CreekWillow Creek below Elkhorn Creek, near Wolf Creek

Cottonwood Creek above Beartooth Ranch, nearWolf Creek

Virginia Creek at mouth, near Canyon CreekCanyon Creek below Cottonwood Creek, near Canyon CreekLittle Prickly Pear Creek near Canyon CreekLyons Creek near Wolf Creek

Wolf Creek at mouth, at Wolf CreekLittle Prickly Pear Creek near Wolf CreekWegner Creek near CraigStickney Creek near CraigMiddle Fork Dearborn River at Highway 200,

near Wolf Creek

Stream- f low-

gaging station

No.

_ _--

06043500--

06044500

06046500060470000604750006048000

0604850006049000

----

06050000

_ _----

06051000--

0605250006053000

----

06054500

06055500--------

_ _--------

06061500--

0606250006063000

--

_ _----__--

_ _

----

06071000--

_ _06071300

------


4682

8401433

140328

2592

37120142666

27323115

320

1 ,100165383

5,200

419

271016

16798

20

465416246

1613128

10

4

21414913

12120

75

33

83

Table 10. --Estimated mean annual streamflow- -Continued

SiteNo. Stream name

Stream-f low-

pagingstation

No.

Meanannualstream-flow(ft 3 /s)

227 South Fork Dearborn River at Highway 434, near Wolf Creek

228 Dearborn River near Craig 06073500229 Flat Creek above Slew Creek, near Craig230 Sheep Creek at mouth, near Cascade232 North Fork Smith River at Highway 89, near White

Sulphur Springs

233 South Fork Smith River at mouth, near White Sulphur Springs

234 Smith River below forks, near White Sulphur Springs235 Big Birch Creek at mouth, near White Sulphur Springs236 Newlan Creek below Charcoal Gulch, near White

Sulphur Springs237 Caroas Creek near mouth, near White Sulphur Springs

238 Smith River near Fort Logan 06076690239 Sheep Creek near White Sulphur Springs 06077000240 Sheep Creek near mouth, near White Sulphur Springs241 Eagle Creek near mouth, near White Sulphur Springs242 Rock Creek River below Buffalo Canyon, near White

Sulphur Springs

243 Tenderfoot Creek below South Fork, near White Sulphur Springs

244 Smith River near Eden245 Hound Creek near mouth, near Cascade246 Missouri River near Ulm247 North Fork Sun River near Augusta

248 Sun River near Augusta249 Sun River below diversion dam, near Augusta250 Willow Creek near Anderson Lake, near Augusta251 North Fork Willow Creek belov; Cutrock Creek,

near Augusta254 Smith Creek near Augusta

255 Ford Creek near Aususta256 Elk Creek near Augusta257 Sun River at Simms260 Missouri River near Great Falls261 Dry Fork at mouth, at Monarch

262 Tillinghast Creek above Joice Creek, near Monarch263 Pilgrim Creek at mouth, near Monarch264 Logging Creek at Logging Creek Campground, near Monarch265 Belt Creek near Monarch266 Big Otter Creek above Never Sweat Creek, near

Raynesford

267 Belt Creek near Portage 06090610268 Highwood Creek below Smith Creek, near Highwood269 Missouri River at Fort Benton 06090800270 Shonkin Creek below Bishop Creek, near Highwood271 South Fork Two Medicine River near East Glacier

273 South Fork Badger Creek near Browning274 North Fork Badger Creek near Browning278 Birch Creek at Swift Dam, near Valier 06094500279 South Fork Dupuyer Creek near Dupuyer280 North Fork Dupuyer Creek near Dupuyer

281 Dupuyer Creek below Scoffin Creek, near Dupuyer282 Birch Creek near Valier 06098100283 Cut Bank Creek near Browning 06098500284 Cut Bank Creek at Cut Bank 06099000285 Marias River at Sullivan Bridge, near Cut Bank

32

200345858

26

586712

17

17031901327

60

06077500--

0607820006078500

0608000006080900

--

06082500

06083500060845000608580006090300

--

_ _----

06090500--

34073

6,400350

890360

5

27

2581

4507,500

33

182515

17011

21022

7,7001871

5953

1201 114

3469140180830

84

Table 10. --Estimated mean annual st reamf low--Continued

Site No.

286287

288290291

292293294295296

297298299301

303

306307309310311

312313315316317

318319320

321322

323324325326330

331333335338339

340341

Stream name

Marias River near ShelbyMarias River at "F" Bridge, above Tiber Reservoir,

near ShelbyMarias River near LomaTeton River near StrabaneMcDonald Creek near Strabane

North Fork Deep Creek near ChoteauSouth Fork Deep Creek near ChoteauDeep Creek near ChoteauTeton River near DuttonMissouri River at Virgelle

Lost Creek at mouth, near UticaYogo Creek at mouth, near UticaMiddle Fork Judith River near UticaSouth Fork Judith River at Indian Hill Campground,

near UticaJudith River above Courtneys Creek, at Utica

East Fork Big Spring Creek at mouth, near LewistownBig Spring Creek above Cottonwood Creek, near HanoverCottonwood Creek at Highway 200, near LewistownBeaver Creek at county road, near LewistownBig Spring Creek at mouth, near Lewistown

Warm Springs Creek above Meadow Creek, near Hi IgerJudith River near WinifredCow Creek below forks, near ClevelandMissouri River near LanduskyNorth Fork Musselshell River near Delpine

Checkerboard Creek near CheckerboardSpring Creek below Whitetail Creek, near CheckerboardNorth Fork Musselshell River near mouth, near

MartinsdaleAlabaugh Creek at mouth, near LennepCottonwood Creek below Loco Creek, near Martinsdale

South Fork Musselshell River above MartinsdaleBig Elk Creek at mouth, at TwodotMusselshell River at HarlowtonAmerican Fork near HarlowtonCareless Creek below Little Careless Creek, near

Hedgesvi lie

Swimming Woman Creek below Dry Coulee, near FranklinMusselshell River near RoundupFlatwillow Creek below the forks, near Grass RangeMusselshell River near MosbyBig Dry Creek above Little Dry Creek, near Van Norman

Little Dry Creek near Van NormanBig Dry Creek near Van Norman

Stream- f low-

gaging station

No.

06099500--

06102050----

__----

0610800006109500

__--

06109780--

--

__--------

__06113500

--0611520006115500

__----

----

06118500061200000612050006121000

--

__06126500

--06130500

--

06131000

Mean annual streamflow (ft3/ 8 )

9101 ,100

8803612

181716

1508,700

248

4210

49

261701922

230

110480

99,700

12

61923

1253

8815

16075

421041

31033

2356

85

Table 11. Results of basin-characteristics regression analysis

r\

[R , coefficient of determination; Q.XX, monthly mean streamflow for specified month exceeded XX percent of the years, in cubic feet per second; QM, mean monthly streamflow for specified month, in* cubic feet per second;

A, drainage area, in square miles; P, mean annual precipitation, in inches]

Stream- flow

charac- Month teristic

October

November

December

January

February

March

Q.90Q.80Q.50Q.20QM

Q.90Q.80Q.50Q.20QM

Q.90Q.80Q.50Q.20QM

Q.90Q.80Q.50Q.20QM

Q.90Q.80Q.50Q.20QM

Q.90Q.80Q.50Q.20QM

0.001320.001550.002190.002340.00234

0.000950.001350.001410.001290.00145

0.000470.000590.000690.000780.00069

0.000440.000560.000910.001070.00079

0.000690.000890.001120.001860.00123

0.000710.001050.002340.005130.00316

Equation

A1.030A0.996A0.965A0.924A0.935

A1.050A1.010A0.994A0.967A0.972

A0.987A0.987A0.994A0.970A0.974

A1.000A1.010A0.978A0.963A0.980

A1.010A1.010A0.998A0.969A0.990

A1.020A1.020A0.991A0.981A0.992

pi. 38P l. 44p l. 47pi. 60pl.51

pl.43pl.43P 1.53pl.67pl.56

pl.69pl.66pl.68P 1.75pl.73

pl.64pl.61P 1.59pl.63pl.63

P 1.51pl.48pl.50pl.46pl.50

pl.53pl.47pl.34P 1.21pl.28

R2

0.67.71.76.82.80

.68

.73

.77

.81

.79

.65

.70

.75

.79

.77

.64

.68

.72

.75

.73

.64

.68

.71

.73

.72

.65

.67

.70

.70

.71

Standard error (loga

rithm, base 10)

0.32.28.24.20.21

.32

.27

.24

.21

.22

.32

.29

.25

.23

.24

.34

.31

.27

.25

.26

.33

.31

.28

.26

.27

.33

.32

.28

.28

.28

Stand ard

error (percent)

8572594750

8370595255

8675635660

9180706367

9080726570

8984737271

86

Table 11. Results of basin-characteristics regression analysis Continued

Stream- flow


April

May

June

July

August

September

Q.90Q.80Q.50Q.20QM

Q.90Q.80Q.50Q.20QM

Q.90Q.80Q.50Q.20QM

Q.90Q.80Q.50Q.20QM

Q.90Q.80Q.50Q.20QM

Q.90Q.80Q.50Q.20QM

0.002510.003470.006310.008320.00631

0.000690.001380.003720.007940.00457

0.000500.000890.003090.005130.00324

0.000660.000600.001320.001820.00155

0.000600.000910.002690.004270.00282

0.000660.001120.002510.005370.00316

Equation

A0.915A0.892A0.886A0.902A0.905

A0.833A0.834A0.853A0.864A0.854

A0.905A0.918A0.904A0.915A0.906

A0.874A0.907A0.932A0.953A0.936

A0.829A0.868A0.851A0.884A0.876

A0.907A0.908A0.920A0.917A0.912

pl.50pl.51pl.48pl.51pl.49

P2.43P2.28P2.07pl.92P2.02

P2.38P2.27P2.07P2.02P2.08

P2.00P2.08pl.96pl.97pl.94



R2

.57

.57

.66

.71

.71

.80

.82

.83

.85

.84

.83

.85

.89

.89

.89

.67

.74

.83

.87

.85

.56

.61

.66

.74

.70

.58

.63

.68

.76

.73


rithm, base 10)

.35

.34

.29

.25

.26

.22

.20

.19

.17

.18

.20

.19

.15

.15

.15

.29

.26

.20

.17

.18

.35

.32

.28

.24

.26

.35

.31

.28

.23

.25

Stand ard

error (percent)

9793736464

5348454143

4946373535

7664484043

9585715965

9583715762

87

Table 12. Results of channel-width regression analysis

[R , coefficient of determination; Q.XX, monthly mean streamflow for specified month exceeded XX percent of the years, in cubic feet

per second; QM, mean monthly streamflow for specified month, in cubic feet per second; W-., active-channel width, in feet]

Month

October

November

December

January

February

March

Stream-

flow charac

teristic

Q.90 Q.80Q.50 Q.20QM

Q.90Q.80Q.50Q.20QM

Q.90Q.80Q.50 Q.20QM

Q.90Q.80 Q.50 Q.20QM

Q.90 Q.80 Q.50 Q.20QM

Q.90Q.80 Q.50Q.20QM

Equation

0.0191 WAC l89° 0.0263 WA,- 1 ' 86

AL.1 QO0.0417 WAC - 82

0.0676 WAr/' /xACi 70 0.0525 VAC

0.0151 WAr 1>95 ACi oo0.0234 WAC X '°°

0.0324 WAC 1<860.0457 WA- 1 ' 83

A\j 1 Q Q

0.0380 VAC

0.0200 WAr 1 ' 83AL 1 Q Q

0.0229 VAC0.0269 WAC |- 8*0.0372 WAC |-°;

/iv> 1 B/i

0.0309 WAc°4

0.0148 WAC 1>870.0166 WAc j' 89

0.0251 WAC l 'f 0.0324 WAC '^0.0251 WAc 5D

0.0151 WAC 1>87 0.0170 WAC J- 89

0.0224 WAC l 'll 0.0331 WAC '^0.0245 WAc 0/

0.0166 WAp 1 ' 90ACi QQ

0.0195 WAC l8 ^ 0.0309 WAC J' 83

iiVj 1 Q 1

0.0468 WAr ACi 090.0355 WAr i>i5Z

R2

0.60 .65.70 .76.75

.62

.65

.70

.74

.72

.57

.61

.67

.71

.69

.57

.62

.65

.69

.67

.57

.62

.66

.69

.67

.58

.60

.64

.63

.64


rithm, base 10)

0.34 .31.26 .22.23

.34

.30

.27

.24

.25

.35

.33

.29

.26

.28

.36

.33

.30

.27

.29

.36

.33

.30

.28

.29

.36

.34

.31

.31

.31

Stand

ard error (percent)

93 8066 5557

9279696164

978775 6771

10189 78 6975

99 88 78 7076

9892 818181

Table 12. Results of channel-width regression analysis Continued

Stream- flow


April

May

June

July

August

September

Q.90Q.80 Q.50Q.20QM

Q.90Q.80Q.50Q.20QM

Q.90Q.80Q.50Q.20 QM

Q.90Q.80Q.50Q.20QM

Q.90Q.80Q.50Q.20QM

Q.90Q.80Q.50Q.20 QM

Equation

0.0447 w^ 1 - 81

- 0.0617 WAC |;

0.1493 WAC }' 8°0.1102 WAC 1>79

0.1247 WAC 1>910. 1758 WAC 1>88

0.2673 WAC }-^0.4027 y^C0.2985 WAC K84

0.1054 W I' 92ACi QA= 0.1 321 W

0.2844 WAC 1>87

0.4055 WAC ' 88 0.2979 WAc' 88

0.0562 WAC 1>78

= 0.0646 \J\r> 'AL. 1 o c0.1009 WAr ,'°^ 1 88

0.1127 WAC 1>85

0.0537 WAC 1>64

0.0550 WAC )' 7 °o.iooo wAC 1- ° J0.1216 WAC -^ 70.0933 WAC 1>0/

0.0316 WAC U750.0380 WAC |' 7 ^0.0513 WAC |' 7 ^0.0794 WAC ' 72

0.0631 WAc /z

R2

.57

.59

.67

.72

.71

.80

.83

.86

.88

.87

.77

.81

.85

.87

.86

.62

.68

.77

.81

.79

.49

.56

.60

.66

.64

.54

.59

.64

.69

.67

Standard error

(loga

rithm, base 10)

.35

.34

.28

.25

.25

.22

.19

.16

.15

.16

.24

.21

.17

.16

.17

.31

.28

.23

.21

.21

.37

.34

.30

.27

.28

.36

.33

.29

.25

.27

Stand ard

error (percent)

9590 706263

5346393638

58524239 40

8172565052

10392786772

101887664 68

89

Table '\ 3,--Streamflow-gaging stations used in test of concurrent-measurement method

SiteNo.

18

36

40

51

115

152

161

178

179

183

194

206

239

275

317

347

352

353

355

360

Stream used as pseudo-ungaged

Name

Big Sheep Creek below MuddyCreek, near Dell


Blacktail Deer Creek nearDillon


Whitetail Creek near Whitehall

Jack Creek near Ennis

Taylor Creek near Grayling

East Gallatin River at Bozeman

Bridger Creek near Bozeman


Crow Creek near Radersburg

Tenmile Creek near Rimini

Sheep Creek near WhiteSulphur Springs

Badger Creek near Browning

North Fork Musselshell Rivernear Delpine

Big Creek near Emigrant

German Gulch near Ramsay

Racetrack Creek below GraniteCreek, near Anaconda

Boulder Creek at Maxville

Skalkaho Creek near Hamilton

site

StationNo.

06013500

06015500

06017500

06019500

06029000

06040300

06043000

06048000

06048500

06050000

06055500

06062500

06077000

06092500

06115500

06191800

12323500

12324100

12330000

12346500

SiteNo.

67

67

67

9

116

102

171

189

171

171

204

204

244

272

323

130

356

356

356

359

Stream used as correlating gaged

Name

Trail Creek near Wisdom



Red Rock River near KennedyRanch, near Lakeview

Boulder River above RockCreek, near Basin

Wise River near Wise River


Gallatin River near Logan



Prickly Pear Creek near Clancy

Prickly Pear Creek near Clancy

Smith River near Eden

Two Medicine River nearBrowning


Madison River near WestYellowstone

Middle Fork Rock Creek nearPhilipsburg



East Fork Bitterroot River

site

Station No.

06024500

06024500

06024500

06011000

06030500

06024590

06043500

06052500

06043500

06043500

06061500

06061500

06077500

06092000

06118500

06037500

12332000

12332000

12332000

12343400

Water year of record

1971

1950

1949

1940

1951

1984

1956

1955

1968

1967

1967

1949

1958

1972

1957

1984

1969

1970

1966

1958near Conner

90

Month

Table 14.--Standard errors for three methods

[Q.XX, monthly mean streamflow for specified month exceeded XX percentof the years, in cubic feet per second; QM, mean monthly streamflow

for specified month, in cubic feet per second]

Standard error, in log units, for specified method and monthly streamflow characteristic

Basin-characteristics method Channel-width method Concurrent-measurement method

Q.90 Q.80 Q.50 Q.20 QM Q.90 Q.80 Q.50 Q.20 QM Q.90 Q.80 Q.50 Q.20 QM

OctoberNovemberDecemberJanuaryFebruaryMarchAprilMayJuneJulyAugustSeptember

0.32.32.32.34.33.33.35.21.20.29.35.35

0.28.27.29.31.31.32.34.20.19.25.32.31

0.24,24.25.27.28.28.28.19.15.20.28.28

0.20.21.23.25.26.28.25.17.15.17.24.23

0.21.22.24.26.27.28.26.18.15.18.26.25

0.34.34.35.36.36.36.35.22.23.31.37.36

0.31.30.32.33.33.34.33.19.21.28.34.33

0.26.27.29.30.30.31.28.16.17.23.30.29

0.22.24.26.27.27.31.25.15.16.20.26.25

0.23.25.28.29.29.31.25.16.17.21.28.27

0.22.20.21.26.22.15.20.33.29.33.39.30

0.20.18.21.23.22.16.24.27.23.24.35.29

0.16.15.18.23.19.16.25.20.20.19.25.23

0.17.15.18.20.13.16.26.19.27.18.22.21

0.18.17.18.21.15.16.26.18.20.17.24.23

91

Table 15. Weights and standard errors for various combinations of methods

[Q.XX, monthly mean streamflow for specified month exceeded XX percent of the years, in cubic feet per second; QM, mean monthly streamflow for specified month, in cubic feet per second; log, logarithm, base 10; pet, percent]

Weights for specified month and monthly flow characteristic

Combinations of methods Q.90 Q.80 Q.50 Q.20 QM

Basin-characteristics methodChannel-width methodConcurrent-measurement methodWeighted standard error (log) Weighted standard error (pet)

Basin-characteristics methodChannel-width methodWeighted standard error (log) Weighted standard error (pet)

Concurrent-measurement methodBasin-characteristics methodWeighted standard error (log) Weighted standard error (pet)

Concurrent-measurement methodChannel-width methodWeighted standard error (log) Weighted standard error (pet)


Basin-characteristics methodChannel-width methodWeighted standard error (log)

OCTOBER

0.000 0..342.658.15

35 31

.685

.315

.31 82 71

.668

.332

.17 41 37

.658

.342

.15 35 31

NOVEMBER

.000

.294

.706

.15 36 32

.683

.317

.31

00035364713

71628428

64735315

64735313

06525568013

76024027

0.000.298.702.12

29

.693

.307

.23 58

.717

.283

.14 32

.702

.298

.12 29

.068

.203

.729

.13 30

.767

.233

.23

0.179.261.559.12

29

.682

.318

.1945

.572

.428

.1331

.614

.386

.13 30

.292

.072

.636

.12 28

.765

.235

.21

0.153.299.548.12

28

.666

.334

.20 47

.555

.445

.13 31

.591

.409

.12 28

.241

.147

.612

.12 29

.751

.249

.22Weighted standard error (pet) 81 69 58 51 54

92

Table 15. Weights and standard errors for various combinations of methods Continued


Combinations of methods Q.90 Q. 80 Q.50 Q.20 QM

NOVEMBER Continued






Concurrent-measurement methodChannel-width methodWeighted standard error (log)

.710

.290

.16 39 33

.706

.294

.15 36 32

DECEMBER

.034

.302

.663

.14 34 32

.806

.194

.32 85 75

.654

.346

.15 36 34

.670

.330

.14

67832214

69530513

09027263813

83316729

62937114

65534513

.733

.267

.13 31

.748

.252

.13 30

.140

.213

.647

.13 30

.824

.176

.25 63

.644

.356

.1331

.678

.322

.13

.643

.357

.12 28

.706

.294

.13 30

.304

.088

.607

.13 31

.806

.194

.22 56

.612

.388

.13 32

.673

.327

.14

.621

.379

.13 30

.668

.332

.13 31

.234

.155

.611

.13 30

.810

.190

.24 59

.613

.387

.13 31

.659

.341


93




JANUARY

Basin-characteristics methodChannel-width methodConcurrent-measurement methodWeighted standard error (log)Weighted standard error (pet)

Basin-characteristics methodChannel-width methodWeighted standard error (log)Weighted standard error (pet)

Concurrent-measurement methodBasin-characteristics methodWeighted standard error (log)Weighted standard error (pet)

Concurrent-measurement methodChannel-width methodWeighted standard error (log)Weighted standard error (pet)



Concurrent-measurement methodBasin-characteristics methodWeighted standard error (log)

.146

.250

.604

.1742 38

.766

.234

.3390 79

.603

.397

.1843 40

.624

.376

.1742 38

FEBRUARY

.024

.294

.681

.1639 36

.699

.301

.3388 78

.682

.318

.17

09928661516

73027030

61438617

63236816

11625462915

67832230

63636416

.192

.244

.564

.1537

.731

.269

.2768

.566

.434

.1638

.596

.404

.1638

.159

.204

.636

.1229

.650

.350

.2769

.649

.351

.13

.254

.158

.588

.1434

.678

.322

.2461

.600

.400

.1535

.632

.368

.1535

.103

.168

.728

.1024

.614

.386

.2562

.748

.252

.11

.239

.178

.583

.1434

.726

.274

.2665

.590

.410

.1535

.623

.377

.1536

.125

.172

.703

.1125

.640

.360

.2667

.718

.282


94



Combinations methods

ofQ- 90 Q. 80 Q. 50 Q. 20 QM

FEBRUARY Continued

Concurrent-measurement method Channel-width method Weighted standard error (log) Weighted standard error (pet)

.686 .652

.314 .348

.16 .1539 36

.666

.334

.1330

.753

.247

.1025

.729

.271

.1126

MARCH

Basin-characteristics method Channel-width method Concurrent-measurement method Weighted standard error (log) Weighted standard error (pet)

Basin-characteristics method Channel-width method Weighted standard error (log) Weighted standard error (pet)

Concurrent-measurement method Basin-characteristics method Weighted standard error (log) Weighted standard error (pet)

Concurrent-measurement method Channel-width method Weighted standard error (log) Weighted standard error (pet)

Basin-characteristics method Channel-width method Concurrent-measurement method Weighted standard error (log) Weighted standard error (pet)

.105

.120

.775

.1229

.698

.302

.3287

.783

.217

.1330

.795

.205

.1229

APRIL

.209

.000

.791

.18

.145

.089

.766

.1332

.683

.317

.3181

.775

.225

.1332

.796

.204

.1432

.176

.123

.701

.22

.244

.020

.736

.1433

.676

.324

.2770

33

73926114

790,21015

35

.193

.253

.553

.23

.152

.000

.848

.1638

.667

.333

.2769

38

,848,15216

937,06316

39

.311

.389

.300

.23

.256

.000

.744

.1434

.681

.319

.2768

.744

.256

.1434

.814

.186

.1536

.295

.315

.391

.2245 53 57 57 55

95


Combinations of methods

Weights

Q.90 Q.

for specified month^and monthly flow characteristic

80 Q.50 Q.20 QM

FEBRUARY Continued






Basin-characteristics methodChannel-width methodConcurrent-measurement methodWeighted standard error (log)

.686

.314

.1639 36

MARCH

.105

.120

.775

.1229 32

.698

.302

.3287 81

.783

.217

.1330 32

.795

.205

.1229 32

APRIL

.209

.000

.791

.18

65234815

14508976613

68331731

77522513

79620414

17612370122

.666

.334

.1330

.244

.020

.736

.1433

.676

.324

.2770

.739

.261

.1433

.790

.210

.1535

.193

.253

.553

.23

.753

.247

.1025

.152

.000

.848

.1638

.667

.333

.2769

.848

.152

.1638

.937

.063

.1639

.311

.389

.300

.23

.729

.271

.1126

.256

.000

.744

.1434

.681

.319

.2768

.744

.256

.1434

.814

.186

.1536

.295

.315

.391


96




APRIL Continued




Basin-characteristics methodChannel-^width methodConcurrent-measurement methodWeighted standard error (log) Weighted standard error (pet)



Concurrent-measurement methodChannel-width methodWeighted standard error (log)

.472

.528

.33 89

.791

.209

.1845

.820

.180

.19 46

MAY

.506

.494

.000

.19 47

.506

.494

.19 47

.043

.957

.21 53

.040

.960

.21

.442

.558

.32 85

.730

.270

.22 54

.729

.271

.22 54

.457

.543

.000

.17 42

.457

.543

.17 42

.142

.858

.20 48

.142

.858

.19

.428

.572

.26 67

.632

.368

.23 58

.602

.398

.23 58

.228

.510

.262

.14 34

.376

.624

.15 36

.448

.552

.16 39

.359

.641

.15

.438

.562

.23 58

.467

.533

.24 59

.411

.589

.23 58

.260

.460

.281

.12 28

.391

.609

.1331

.426

.574

.14 33

.356

.644

.13

.476

.524

.24 59

.491

.509

.23 57

.475

.525

.2357

.235

.472

.293

.13 32

.397

.603

.14 34

.463

.537

.15 36

.389

.611


97







Concurrent-measurement methodChannel-^width methodWeighted standard error (log)Weighted standard error (pet)



Concurrent-measurement methodBasin-characteristics methodWeighted standard error (log)

Q.90

.450

.282

.269

.1843

.713

.287

.2048

.271

.729

.1945

.385

.615

.1946

.032

.505

.463

.2151

.685

.315

.2974

.436

.564

.22

Q.80

JUNE

.348

.327

.325

.1639

.645

.355

.1844

.341

.659

.1742

.443

.557

.1741

JULY

.012

.419

.569

.1844

.752

.248

.2563

.535

.465

.19

Q.50

.369

.303

.328

.1228

.618

.382

.1433

.366

.634

.1330

.441

.559

.1330

.129

.324

.547

.1535

.718

.282

.1946

.533

.467

.16

Q.20

.431

.350

.219

.1125

.573

.427

.1330

.256

.744

.1229

.297

.703

.1330

.377

.222

.401

.1433

.697

.303

.1638

.444

.556

.14

QM

.383

.323

.294

.1126

.598

.402

.1331

.337

.663

.1229

.408

.592

.1330

.187

.269

.544

.1331

.695

.305

.1741

.559

.441


98



Combinations of methods Q.90 Q. 80 Q.50 Q.20 QM

JULY Continued






Basin-characteristics methodChannel-width methodConcurrent-measurement methodWeighted standard error (log)

.468

.532

.2151 44

AUGUST

.000

.519

.481

.2563 56

.857

.143

.3595 84

.443

.557

.2769 62

.481

.519

.2563 56

SEPTEMBER

.000

.410

.590

.21

57242818

00051948123

78821232

44655425

48151923

00044255820

.595

.405

.1535

.000

.387

.613

.2151

.780

.220

.2870

.603

.397

.2255

.613

.387+ Z. L

51

.000

.392

.608

.18

.583

.417

.1535

.000

.334

.666

.2048

.752

.248

.2358

.637

.363

.2150

.666

.334

.2048

.007

.376

.617

.17

.628

.372

.1332

.000

.399

.601

.1947

.763

.237

.2564

.573

.427

.2151

.601

.399

.1947

.000

.424

.576


99




Q.90 Q.80 Q.50 Q.20 QM

SEPTEMBER Continued

Basin-characteristics method .720 .665 .670 .678 .683Channel-width method .280 .335 .330 .322 .317Weighted standard error (log) .34 .31 .27 .22 .24Weighted standard error (pet) 94 81 69 54 60

Concurrent-measurement method .596 .555 .616 .594 .552Basin-characteristics method .404 .445 .384 .406 .448Weighted standard error (log) .24 .23 .20 .19 .19Weighted standard error (pet) 61 56 49 45 46

Concurrent-measurement method .590 .558 .608 .620 .576Channel-width method .410 .442 .392 .380 .424Weighted standard error (log) .21 .20 .18 .17 .17Weighted standard error (pet) 53 48 43 42 40

100

Table 16. Streamflow-gaging stations used in test of record-extension procedure

Site No. Name

Station No.

Period of record (water year)

37 Beaverhead River at Barretts 06016000 42 Beaverhead River near Twin Bridges 06018500 51 Ruby River above reservoir, near 06019500

Alder110 Big Hole River near Melrose 06025500 118 Boulder River near Boulder 06033000

126 Willow Creek near Harrison 06035000 130 Madison River near West 06037500

Ye Hows tone 156 Madison River below Ennis Lake, 06041000

near McAllister 171 Gallatin River near Gallatin 06043500

Gateway 183 Hyalite Creek at Hyalite Ranger 06050000

Station, near Bozeman

189 Gallatin River near Logan 06052500193 Missouri River near Toston 06054500259 Muddy Creek at Vaughn 06088500286 Marias River near Shelby 06099500316 Missouri River near Landusky 06115200

325 Musselshell River at Harlowton 06120500 333 Musselshell River near Roundup 06126500355 Boulder Creek at Maxville 12330000356 Middle Fork Rock Creek near 12332000

Philipsburg 358 Nevada Creek above reservoir, 12335500

near Helmville

1908-86 1935-86 1938-86

1924-86 1929-73;1985-86

1938-86 1913-73;1983-86

1939-86

1930-82;1985-86

1934-86

1906;1928-86 1911-17;1941-86 1935-68;1971-86 1906-08;1911-22;1924-86 1934-86

1907-86 1946-86 1939-861938-86

1939-86

101

Table 17. Standard errors for record-extension procedure for various record lengths

[Q.XX, monthly mean streamflow for specified month exceeded XX percent of the years, in cubic feet per second; QM, mean monthly streamflow

for specified month, in cubic feet per second]

Standard error, in log units, for specified record length and monthly streamflow characteristic

Month Q.90 Q.80 Q.50 Q.20 QM

5 years of record


0.22.14.12.09.08.07.14.17.16.18.11.13

0.13.10.09.05.07.04.09.10.11.13.09.07

0.06.05.05.04.04.07.07.08.09.12.06.04

0.04.06.04.07.07.11.08.10.09.11.10.05

0.05.05.04.06.05.09.07.08.08.08.08.04


.10

.05

.04

.06

.04

.05

.04

.11

.13

.12

.07

.14

15 years of record

.08 .03

.05 .03

.04 .03

.04 .02

.02 .02

.03 .04

.04 .03

.05 .05

.05 .06

.06 .06

.07 .05

.03 .05

.03

.02

.02

.05

.04

.05

.04

.06

.05

.05

.03

.04

.02

.02

.02

.03

.02

.03

.02

.04

.03

.04

.03

.03

102

Table 17. Standard errors for record-extension procedure for various record lengths Contfnued

Month

Standard error, in log units, for specified record length and monthly streamflow characteristic

Q.90 Q.80 Q.50 Q.20 QM

25 years of record


.10

.05

.04

.06

.04

.03

.05

.05

.06

.05

.05

.13

.03

.04

.03

.04

.02

.03

.03

.06

.03

.05

.03,0*

.02

.01

.01

.03

.02

.05

.02

.03

.02

.03

.03

.03

.03

.02

.02

.02

.03

.05

.04

.02

.02

.03

.02

.03

.01

.01

.01

.01

.02

.03

.02

.02

.02^03.02.02


-02 .02 .03 .04 .01 .03 .06 .06 .07 .02 .10

35 years^ of record

.03 .01

.02 .02"

.02 .01

.02 .01

.02 .01

.01 .01

.05 .02

.04 .02

.03 .02

.04 .02JQ2 .02.03 .02

.02

.02

.02

.04

.01

.01

.02

.03

.02

.05

.04-

.01

.01

.01

.01

.01

.01

.0-1

.01

.01

.01

.03

.02

103

estimates of monthly streamflow characteristics … · estimates of monthly streamflow...

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