water-resources investigations report 87-4207 · 2011. 1. 12. · water-resources investigations...
TRANSCRIPT
TECHNIQUE FOR ESTIMATING FLOOD-PEAK DISCHARGES
AND FREQUENCIES ON RURAL STREAMS
IN ILLINOIS
By G. W. Curtis
U.S. GEOLOGICAL SURVEY
Water-Resources Investigations Report 87-4207
Prepared in cooperation with
ILLINOIS DEPARTMENT OF TRANSPORATION,
DIVISION OF WATER RESOURCES
Urbana, Illinois
1987
DEPARTMENT OF THE INTERIOR
DONALD PAUL HODEL, Secretary
U.S. GEOLOGICAL SURVEY
Dallas L. Peck, Director
For additional information write to:
District Chief U.S. Geological Survey Water Resources Division 102 E. Main St. , 4th Floor Urbana, IL 61801
Copies of this report can be purchased from:
U.S. Geological SurveyBooks and Open-File Reports SectionFederal CenterBox 25425Denver, CO 80225
CONTENTS
Page
Abstract............................. ................................... 1Introduction............................................................ 1Technique for estimating flood-peak discharges.......................... 2Application of estimating technique..................................... 3
Site on ungaged stream............................................. 3Site at gaged location............................................. 4Site near gaged location........................................... 5Regulated and urban streams..........,............................. 7
Accuracy and limitation of estimating technique......................... 7Data analyses........................................................... 8
Station flood-frequency analyses................................... 8Regional analyses.................................................. 10
Summary................................................................. 12References cited........................................................ 13
ILLUSTRATIONS
Figures1-4. Maps showing:
1. Location of streamflow data-collection sites inIllinois, Indiana, and Wisconsin..................... 16
2. Location of streamflow data-collection sites innortheastern Illinois, northwestern Indiana, and southeastern Wisconsin............................... 18
3. Distribution of rainfall intensity (24-hour2-year), I, in inches, in Illinois................... 19
4. Geographic regionsj R, in Illinois..................... 205. Graph showing regression constant and coefficients for
estimating equations, Qj, = a Ab Sc (1-2.5) d Rf............ 216. Flow diagram for determining flood-peak discharge........... 22
7-9. Graphs showing:7. Relation of flood-peak discharges for selected
recurrence intervals to drainage area, Big Muddy River, since 1970.......................... 23
8. Relation of flood-peak discharges for selected recurrence intervals to drainage area, Fox River............................................ 24
9. Relation of flood-peak discharges for selectedrecurrence intervals to drainage area, * ,; Illinois River....................................... 25
111
TABLES
Page
Table 1. T-year peak discharges at gaging stations.................... 262. Selected basin characteristics, years of record, equiva
lent years of record, and maximum flood for nonregulated rural gaging stations...................................... 63
3. Regional factors, Rf......................................... 714. Accuracy of estimating equations, 0% = aAb Sc (1-2.5) d Rf... 715. Selected statistical characteristics for annual peak
discharges for nonregulated rural gaging stations.......... 72
GLOSSARY
Annual peak discharge. The highest instantaneous peak discharge in a water year.
Cubic foot per second (ftVs). The rate of discharge representing a volume of 1 cubic foot of water passing a given point during 1 second and is equiva lent to 7.48 gallons per second or 448.8 gallons per minute.
Discharge (Q). The rate of flow of water in a stream at a given place and within a given period of time, in cubic feet per second.
Drainage area (A). Contributing area from which surface runoff is carried away by a single drainage system, in square miles.
Equivalent years of record. A measure of the accuracy with which the regres sion model can estimate the Qrj, at a site, expressed in years.
Flood. A relatively high flow, as measured by either gage height or discharge, which usually overtops the natural banks along some reaches of a stream.
Flood peak. The highest value of the stage or discharge attained by a flood; thus, peak stage or peak discharge.
Flood frequency. The average interval of time within which a given flood peak will be exceeded once (see recurrence interval).
Gaging station. A particular site on a stream where systematic observations of gage height and discharge are obtained.
Probability. The likelihood or chance that a flood or storm will occur or that the magnitude of a flood or storm will be exceeded.
QT . The discharge for a recurrence interval of T-years. The annual peak dis- charge will be exceeded once every T-number of years on the average.
Rainfall intensity (I). The maximum 24-hour rainfall, in inches, that has a recurrence interval of 2 years.
iv
Recurrence interval. The average interval of time (T-years) within which a given hydrologic phenomenon will be exceeded once. Also called return period.
Regional factor (Rf). A factor used to remove geographic bias in an esti mating equation, dimensionless.
Regression equation. A mathematical relation between a dependent variable and one or more independent variables.
Regulated stream. A stream that has been subjected to control by reservoirs/ diversions, or other manmade hydraulic structures.
Rural stream. A stream in which the drainage area is predominantly rural. In general, the drainage area contains not more than about 5 percent urbanization.
Slope (S). The main channel slope, in feet per mile. It is based on the dif ference of elevations divided by distance between points 10 percent and 85 percent of the total distances measured along the low-water channel of the stream from the site to the basin divide.
Standard error of prediction. A measure of the accuracy with which a regres sion model estimates the QT flood at a site, expressed in percent. The true value of the Qrp will occur within the standard error of prediction percent of the predicated value about two times out of three.
T-year flood. The average interval of time (T) that a flood-peak discharge will be exceeded, in years. See QT «
Water year. The 12-month period from October 1 to September 30, during which streamflow data are collected, compiled, and reported.
CONVERSION FACTORS
For the convenience of readers who may want to use metric (International System) units, the inch-pound values in this report may be converted by using the following factors:
Multiply inch-pound unit By To obtain metric unit
foot (ft) 0.3048 meter (m)
foot per mile (ft/mi) 0.1894 meter per kilometer (mAm)
cubic foot (ft 3 ) 0.02832 cubic meter (m3 )
cubic foot per second (ft3 /s) 0.02832 cubic meter per second (m 3 /s)
inch (in.) 25.4 millimeter (mm)
mile (mi) 1.609 kilometer (km)
square mile (mi 2 ) 2.590 square kilometer (km2 )
TECHNIQUE FOR ESTIMATING FLOOD-PEAK DISCHARGES AND
FREQUENCIES ON RURAL STREAMS IN ILLINOIS
By G. W. Curtis
ABSTRACT
Flood-peak discharges and frequencies are presented for 394 gaged sites in Illinois/ Indiana, and Wisconsin for recurrence intervals ranging from 2 to 100 years. A technique is presented for estimating flood-peak discharges at recurrence intervals ranging from 2 to 500 years for nonregulated streams in Illinois with drainage areas ranging from 0.02 to 10/000 squares miles. Multiple-regression analyses/ using basin characteristics and peak streamflow data from 268 of the 394 gaged sites/ were used to define the flood-frequency relation. The most significant independent variables for estimating flood- peak discharges are drainage area/ slope/ rainfall intensity/ and a regional factor. Examples are given to show a step-by-step procedure in calculating a 50-year flood for a site on an ungaged stream/ a site at a gaged location/ and a site near a gaged location.
INTRODUCTION
The purpose of this report is to provide updated station flood-peak dis charges and frequencies and to provide improvement to the previous techniques for estimating flood-peak discharges and frequencies of floods for sites on most streams where flood discharges are not significantly affected by regula tion or urbanization. Flood-peak discharges and frequencies are presented for 394 gaging stations in Illinois/ Indiana/ and Wisconsin for recurrence inter vals of 2/ 5/ 10/ 25/ 50/ and 100 years. A technique using drainage area (A)/ slope (S)/ rainfall intensity (I)/ and regional factor (Rf) was developed for estimating flood-peak discharges at ungaged sites in Illinois. Equations using these variables are applicable for estimating flood-peak discharges for recurrence intervals of 2 to 500 years for drainage areas ranging from 0.02 to 10/000 square miles (mi 2 ) on nonregulated rural streams. Estimates of future floods are necessary for the proper design of engineering projects such as bridges/ culverts/ highways/ and flood-control structures; for establishment of actuarial flood-insurance rates; and for proper flood-plain management by State and local agencies.
Previous techniques for estimating flood-peak discharges and frequencies in Illinois have been provided by Mitchell (1954)/ Speer and Gamble (1965)/ Wiitala (1965)/ Patterson and Gamble (1968)/ Ellis (1968)/ Cams (1973)/ Curtis (1977a)/ and Alien and Bejcek (1979). Techniques were developed by Cams (1973)/ Curtis (1977a)/ and Alien and Bejcek (1979) using ordinary least
squares multiple-regression analyses as recommended by Thomas and Benson (1970). Additional data and improved analytical methods used in this report increase the confidence in estimating techniques over those published in earlier reports.
This report was prepared under a cooperative agreement between the State of Illinois, Department of Transportation, Division of Water Resources, and the U.S. Geological Survey (Survey). Streamflow data were collected in coop eration with the U.S. Army Corps of Engineers and State and local agencies.
TECHNIQUE FOR ESTIMATING FLOOD-PEAK DISCHARGES
Annual peak discharges from gaging stations having a minimum of 10 years of record through the 1985 water year were used to define station flood- frequency relations. Locations of these stations are shown in figures 1 and 2. The map number, identification number, name, geographic location, and station flood-peak discharges for the stations are listed in table 1. All figures and tables are grouped in the back of the report for easy reference.
Station flood-frequency relations were defined using the Hydrology Subcommittee of Interagency Advisory Committee on Water Data (1982), formerly U.S. Water Resources Council, guidelines. These guidelines outline procedures to fit the logarithms of observed annual peak discharges to the Pearson Type III frequency distribution.
Peak discharges of various recurrence intervals and basin characteristics for gaging stations were used in multiple-regression analyses to develop esti mating equations for flood-peak discharges and frequencies on nonregulated rural streams in Illinois. Data from stations affected by either urbanization or by regulation were not included in the regression analyses. Relations were developed for estimating flood-peak discharges corresponding to the 2-, 5-, 10-, 25-, 50-, 100-, and 500-year recurrence-interval flood (T-year flood or Qrp). The regression analyses indicated that the independent variables drainage area (A), slope (S), rainfall intensity (I), and regional factor (Rf) are the most significant variables to use in estimating flood-peak discharges for Illinois streams. One estimating equation for each recurrence interval provides a straightforward technique to compute flood-peak discharges for both small and large Illinois streams. Flood-peak discharges and frequencies, basin charac teristics and other pertinent data, and regional factors are tabulated in tables 1, 2, and 3. In table 1, two sets of station flood-peak discharges are presented for two stations (Nos. 385 and 389) on the Big Muddy River. The first set of discharges are for periods of nonregulated flow and were used in the regression analyses. The second set of discharges are for periods ofregulated flow and were not used in the regress: .on analyses.
The reliability of flood-frequency estimates is uncertain for very large recurrence intervals. Because of this uncertainty, the 500-year flood dis charges are omitted from table 1. An estimating equation for the 500-year flood is provided primarily for planners who are required to compute this event for special purposes such as flood-insurance studies. Only those stations used in the regression analyses are listed in table 2.
The flood-frequency and the regression analyses, used to develop the estimating technique, are defined in detail in the data-analyses section.
Flood-peak discharge equations, applicable statewide, for estimating Qrp on nonregulated rural streams are as follows:
Q2 - 40.3 A0 ' 790 S°' 481 (1-2.5)°' 677 Rf (1)
Q5 - 66.4 A0 ' 786 S°' 513 (1-2.5)°' 719 Rf (2)
Q 10 - 83.0 A0 ' 785 S°' 532 (1-2.5)°' 742 Rf (3)
Q25 = 103 A0 * 786 s°* 552 (1-2.5)°' 768 Rf (4)
Q50 = 118 A0 * 786 s°* 566 (1-2.5)°' 786 Rf (5)
Q 100 - 132 A0 ' 787 S°' 578 d-2.5)°' 803 ^ (6)
Q500 = 162 A0 ' 789 S°' 601 (1-2.5)°' 838 Rf (7)
The four variables required to solve the equations are drainage area (A), slope (S), rainfall intensity (I), and regional factor (Rf). Drainage area and slope are determined from topographic maps. Drainage area is the area contrib uting to surface runoff. Slope is determined between points 10 percent and 85 percent of the total distance measured along the low-water channel from the site to the basin divide. The rainfall intensity is determined from figure 3. The regional factor is determined by first selecting the region number from figure 4 and then the appropriate regional factor from table 3.
Flood-peak discharge equations for recurrence intervals between 2 and 100 years, other than those in equations 1 to 7, may be developed by interpolating the regression constant and coefficients from the graphs in figure 5.
APPLICATION OF ESTIMATING TECHNIQUE
The technique for estimating flood-peak discharges and frequencies is applicable to either ungaged or gaged nonregulated rural streams. Figure 6 shows the sequence to follow for estimating a flood-peak discharge at a site. Step-by-step procedures for applying the estimating technique are given in the examples that follow.
Site on Ungaged Stream
Flood frequency estimates at sites on ungaged streams are calculated using equations 1 to 7.
Example 1: Computation of the 50-year recurrence interval flood at a site on an ungaged stream:
1. Determine the size of contributing drainage area (A), in square miles. The area can be planimetered on topographic, county, or other maps suitable for delineating the basin boundary. For this example, assume A = 625 mi^.
2. Determine the slope (S), in feet per mile (ft/mi). Slope isbased on the difference of elevations divided by distance between points 10 percent and 85 percent of the total distance measured along the low-water channel of the stream from the site to the basin divide. For this example, assume S = 2.5 ft/mi.
3. Determine the rainfall intensity (I), in inches, from figure 3. The value of I should be an average for the basin. For this example, assume I = 3.1 inches.
4. Determine the region (R) and the regional factor (Rf) from figure 4 and table 3, respectively. For this example, R is III and Rf is 0.862.
5. Select equation 5 from page 3 and compute the flood magnitude.
Q50 = 118 A0 - 786 s°' 566 (1-2.5)°' 786 Rf
= (118)(625)°- 786 (2.5)°- 566 (3.1-2.5)°- 786 (0.862)
= (118)(157.6)(1.68)(0.669)(0.862)
= 18,000 ft 3 /s.
Site at Gaged Location
Flood frequency estimates at gaged sites are combinations of the gaging station frequency curve and the equation estimates. The equivalent years of record concept (Hardison, 1971) was used to obtain weighted estimates of peak flow at gaged sites using estimates obtained from station records and from equations 1 to 7. This procedure was described by the Hydrologic Subcommittee (1982) and is expressed in the equation
Om Yrs of record (log sta. QT ) + Eg yrs record (log regional QT ) t
Yrs of record + Eq yrs record
In equation 8, station QT is obtained from the first line of discharge valuesin table 1 and converted to a logarithm (log).mined from table 2. The regional Qip is computed using the desired regionalestimating equation on page 3 or obtained from
The years of record are deter-
the second line of dischargevalues in table 1 and then transformed into logs. The station equivalent years of record (Eq yrs record) for the equation are also given in table 2. The antilog of the result from equation 8 is the weighted estimate of the sta tion flood discharge.
Example 2: Computation of the weighted 50-year recurrence interval flood at the gaging station 05572000 Sangaraon River at Monticello, Illinois (map No. 307) :
Yrs of record (log sta. Qcn) + Eq yrs record (log equation
Yrs of record + Bq yrs record
76(4.23553) + 5.5(4.15229)76 + 5.5
= 344.73788 81.5
= 4.22991
ft 3 /s.
For convenience, the weighted estimates for a station have been tabulated in the third line of values in table 1 . Equation 8 may be used to update the values of line 3 in table 1 as additional years of record are obtained.
Site near Gaged Location
Flood frequency estimates at a site near a gaging station on the same stream can be calculated by a combined use of the estimating equations 1 to 7 and the nearby station data. The following procedure is suggested for use if the site has a drainage area within 50 percent of the drainage area of the gaging station. Define the ratio, r:
r = (9)QT (gage, eq. 1-7)
This ratio represents the correction needed to adjust the estimating equation value to the gage weighted value. The following equation, derived by Sauer (1974), gives the adjustment factor, r 1 , for a site that is near a gaged site on the same stream:
r' = r - -r r- (r-1.00). (10) 0.
In equation 10, AA is the difference between the drainage areas of the site and the gaged site, and AQ is the drainage area at the gaged site. The adjusted Qip for a site is computed using the equation:
QT (adjusted) = Qj, (eq. 1-7) r 1 . (11)
If the drainage area of the site differs by more than 50 percent of the gaged site, that is, AA/Ag is greater than 0.5, equation 11 should not be used, and the results of estimating equations 1 to 7 should be used without adjustment.
Example 3: For this example, assume the site in example 1 is located on the Sangamon River downstream from gaging station 05572000 Sangamon River at Monticello, Illinois (map No. 307). The drainage area, from table 2, is 550 mi 2 for the gaging station. The procedure is as follows:
First computation:
1-5. Same as example 1, site Q50 = 18,000 ft 3 /s.
Second computation:
6. Same as example 2, gage weighted Q50 "= 17,000 ft 3 /s; or, the weighted may be selected from table 1, line 3 for station 05572000.
Third computation:
7. From table 1, select the Q5Q that was computed using equation 5 for the station (second line). Q50 = 14,200 ft 3 /s.
8. AA _ 625-550 _ 0 14 [This is less than 0.5, therefore, r 1 should AQ 550 " " be computed and used to adjust Q5g (eq. 5).]
9. Compute the adjustment ratio, r, using equation 9.
= weighted) _ 17,000 ft 3 /s _ 1>2 Q.
Q50 (gage, eq. 5) 14,200 ft 3 /s
10. Compute the adjustment factor, r 1 , using equation 10.
r 1 = r - n AA (r-1.00) 0.5AG
11. Compute the adjusted Q5g at the site using equation 11
Q50 (adjusted) = Q5Q (eq. 5) r 1
= 18,000 ft 3/s (1.15)
= 20,700 ft 3 /s.
This is the best estimate for the ung&ged site on the Sangamon River.
The site for which flood- frequency calcul.ations are desired may sometimes be between two gaged sites on the same stream. The 50-percent rule should be applied to determine which gaged site, if any, should be used to make the adjustment. If the ungaged site is within 50 percent of both gaged sites, the frequency calculations for the ungaged site can be made by interpolation of the weighted station values Qrp for each gaged site. Again, interpolation should be on the basis of drainage area.
Regulated and Urban Streams
The regional equations are not appropriate for making flood-frequency estimates on the main stem of the following regulated streams:
Big Muddy RiverFox RiverIllinois RiverSaline River (below mouth of Cypress Ditch).
Flood peaks on these streams are altered by channel improvements, levees, dams, diversion, or interbasin flow. For the Big Muddy, Fox, and Illinois Rivers, flood frequencies may be estimated for ungaged sites by interpolation between gaged sites on the basis of drainage area. This interpolation is facilitated by the graphs shown in figures 7 through 9.
Many of the flood discharges recorded for Saline River near Junction include interbasin flow from the Wabash River through Cypress Ditch just up stream from the gaging station. The magnitude of the interbasin flow depends on the stages of the Wabash River that, in turn, are dependent on the stages of the Ohio River. Frequently the stages of the Saline River near Junction are affected by backwater from the Ohio River. The complexity of flood conditions precludes the use of the regionalized equations for estimating the frequency of floods on the Saline River downstream from Cypress Ditch.
Alien and Bejcek (1979) presented a technique for estimating flood-peak discharges and frequencies on urban streams in northeastern Illinois. A suggested transferability-of-urban-effeet technique was also presented. It was assumed that the effects of urbanization on flood peaks in northeastern Illinois may be similar to urban effects in other parts of Illinois. Based on this assumption, the equations for rural streams on page 3, along with proce dures in the report by Alien and Bejcek (1979), may be used to estimate flood frequencies on urban streams in other parts of Illinois. These estimates should be checked by any other available methods.
ACCURACY AND LIMITATION OF ESTIMATING TECHNIQUE
The accuracy of equations 1 to 7 is expressed by the standard error of prediction, in percent and in equivalent years of record. The standard error of prediction (Stedinger and Tasker, 1986b) is a measure of the accuracy with which the regression model can estimate the T-year flood at an ungaged site. The true value of the T-year flood in log units will be within plus or minus one standard error of prediction from the predicted value about two times out of three. The standard error of prediction was determined in log units and converted to percent and equivalent years of record by techniques given in Hardison (1971). Equivalent years of record indicates the number of years of streamflow record that provides an estimate equal in accuracy to the standard error of prediction.
The accuracy of equations 1 to 7 is summarized in table 4. The equivalent years of record in table 4 represents an average equivalent year of record for the estimating equations. Individual station equivalent years of record from table 2 should be used in equation 8 for weighting the independent estimates.
The flood-frequency equations in this report may be used to estimate flood-peak discharges and frequencies on most Illinois nonregulated rural streams for drainage areas ranging from 0.02 to 10,000 mi 2 , slopes ranging from 0.7 to 230 ft/mi, and 24-hour 2-year rainfall intensity from 2.6 to 3.6 inches. The equations are not applicable to streams where floodflows are appreciably affected by natural or reservoir storage; channel changes; diversions; urbanization; unusual hydrogeologic or morphologic conditions such as in karst terrane, bluff-flood plain combinations (streams that transverse the bluff and adjacent flood plain of major rivers); or other unaccounted for conditions that affect floodflow.
DATA ANALYSES
Discharge data used in the station flood-frequency and regional analyses were obtained from the surface-water gaging-station network maintained by the Survey. Annual peak discharges from 394 continuous-record and crest-stage partial-record stations having 10 years or more of record were used in the flood-frequency analyses. Of these stations, 383 are located in Illinois, 4 in Indiana, and 7 in Wisconsin (figs. 1 and 2). Peak flows from 268 of the 394 stations represent nonregulated rural sites, and these data were used in the regional analyses. Annual peak-flow records collected through September 30, 1985, were used in this report.
Drainage area (A) and slope (S) were determined from either topographicmaps, field surveys, aerial photographs, or asThe rainfall intensity (I) represents the 24-hour 2-year rainfall-durationfrequency and was determined from Hershfield (
published in Survey reports.
1961).
The map number, station number, and station name and location for the 394 stations are shown in table 1.
Station Flood-Frequency Analyses
Flood-frequency analyses define the relation of flood-peak discharges to exceedance probabilities or recurrence intervals. Exceedance probability is the chance that a given discharge will be exceeded in any one year. Recurrence interval is the reciprocal of the exceedance probability times 100 and is the average time interval between occurrences of a flood-peak discharge of a given or greater magnitude. For example, a flood having an exceedance probability of 0.01 has a recurrence interval of 100 years; or, a 100-year flood may be exceeded on the average of once in 100 years. I However, probability only describes the likelihood of a random event occurring, and a flood magnitude of a given recurrence interval may be exceeded in] a much shorter period of time.
Flood-frequency relations for 394 gaging stations were defined using the Hydrology Subcommittee of Interagency Advisory Committee on Water Data (1982) guidelines. These guidelines outline procedures to fit logarithms of observed annual-peak data to the Pearson Type III distribution.
A computer was used to perform frequency computations and plots for 394 gaging stations. The computer calculated the following:
An array of N annual flood-peak discharges (Q) at a station were transformed into an array of corresponding base 10 logarithmic values (X)
XN
and the means of the logarithms were computed by
_ rvX = ±± . (12)
N
Next the standard deviation (SD) and skew coefficient (G) were computed by
SD(ZX2 )-(ZX) 2/N
(N-1)
and N Z(X-X) 3
0.5(13)
J_. _ respectively.
(N-1)(N-2)(SD) 3 (14)
The technique for fitting log-Pearson Type III distributions to observed annual peaks is to compute the base 10 logarithms of the discharge (Q) at selected exceedance probability (P) by the equation
Log Q = X + K(SD) (15)
where X is the mean of the logs of the annual peaks at a gaging station,and
K is a factor from tables in Hydrology Subcommittee (1982) that is a function of the skew coefficient (G) and selected exceedance probability.
The skew coefficient of peak flows at a station is sensitive to extreme events. Therefore, accurate estimates of skew require a long period of record. A generalized estimate of skew is recommended (Hydrology Subcommittee, 1982) for stations with short periods of record.
For this study, logarithms of annual-peak discharges were fitted to the Pearson Type III distribution giving weight to historical peaks and high out liers, omitting low outliers, and using the generalized skew map of the Hydrology Subcommittee (1982). For stations having less than 25 years of record, the generalized skew was used for computing the frequency relation. For those stations with record lengths longer than 25 years, the station skew was weighted with the generalized skew. A weighted skew is calculated by com bining the station and generalized skew coefficients using the equation:
MSEp(G) + MSEr (G~)GW = - £ ' (16)
+ MSE
where GW = weighted skew coefficient,
G = station skew,
(3 = generalized skew,= mean-square error of generalized skew, and
= mean-square error of station skew
The flood-frequency curves for the individual stations were computed using equation 14. The discharge values from the individual station curve for recurrence intervals of 2, 5, 10, 25, 50, and 100 years are given in table 1. Log-Pearson Type III statistics used to develop the frequency relations for each station are shown in table 5.
Regional Analyses
Most sites where streamflow information is needed will not have stream- flow records available. Flood-peak discharges from individual stations have limited transferability; therefore, estimates of flood-peak discharges at ungaged sites should be based on regional analyses. The advantages of regional analyses are that (1) the flood-frequency relation is applicable to all ungaged sites in an entire region, and (2) the relation can improve the flood-frequency estimates at a gaged site.
Traditionally, regression models have used ordinary least squares (OLS)to estimate relations between steamflow chara :teristics and relevant physiographic variables such as drainage area and channel slope. Several investiga tors (Matalas and Benson, 1961; Matalas and Gilroy, 1968; Hardison, 1971; Moss and Karlinger, 1974; Tasker and Moss, 1979; and Moss, 1976, 1979) have examined the statistical precision and properties of OLS procedures with hydrologic data sets. The OLS approach can provide distorted estimates of the model's predic tive capability and the precision with which the regression model's parameters are estimated. Weighted (WLS) and generalized least squares (GLS) techniques were developed to deal with situations like those encountered in hydrology where a regression model's residuals are heteroscedastic and perhaps cross- correlated (Draper and Smith, 1981; Johnston, 1972). Stedinger and Tasker (1985, 1986a) compared the statistical performance of OLS, WLS, and GLS in situ ations where streamflow records at gaged sites can be of different and widely varying lengths and concurrent flows at different sites are cross-correlated. They found that the GLS procedure was superior and provided (1) more accurate parameter estimates, (2) better estimates of the accuracy with which the regres sion model's parameters were estimated, and (3) almost unbiased estimates of the model error.
A new improved statistical model (G. D. Tasker, A. M. Lumb, W. O. Thomas, and K. M. Flynn, U.S. Geological Survey, written commun., 1987) for analyzing hydrologic data was used in this study. This model, which uses GLS in a multiple regression analysis, was used to define the flood-frequency relations in equations 1 to 7.
Multiple-regression analyses were used to relate peak flows as dependent variables to the basin characteristics and a climatic factor as independent variables. Variables were transformed to a log of base 10 before analyses for
10
the principal reasons to (1) linearize the regression equation, (2) stabilize the variance of the residuals about the regression equation, and (3) normalize the distribution of the residuals about the regression equation. After analy ses, the log equations were transformed by taking the antilog into the final equation format as shown in equation 17. Discharges corresponding to the 2-, 5-, 10-, 25-, 50-, 100-, and 500-year recurrence-interval flood were defined at 268 nonregulated rural gaging stations by using the log-Pearson Type II:E distribution and were regressed against the basin and climatic variables using the multiple regression model:
QT = aAbBc .......Nn (17)
where QT = flood-peak discharge, in cubic feet per second, havinga T-year recurrence interval,
A,B,...N = drainage basin and climatic variables, b,c,...n = regression coefficients, and
a = regression constant.
Combinations of independent variables such as drainage area, main channel length, slope, storage (lakes and ponds), forest cover, soil index factor, and rainfall intensity index were evaluated in a preliminary ordinary multiple regression analyses for computing the dependent variable T-year recurrence interval flood. Only the significant independent variables were used in the GLS analysis, and they are drainage area (A), slope (S), and rainfall inten sity (I).
Curtis (1977b) showed that significant differences in flood peaks could be related to geographic regions of the State as well as to drainage area, slope, and rainfall intensity. The boundaries for the geographic regions were delineated based on physiographic divisions, drainage-basin boundaries, and residual patterns. To account for geographic variation, a regional factor (Rf) was included in the regression analyses. A technique by Tasker (G. D. Tasker, U.S. Geological Survey, Reston, Virginia, written comraun., 1986) was used to compute the regional factors. The factors were computed using "dummy" variables in the regression analyses. Detailed explanations of dummy variables in regressions can be found in Draper and Smith (1981) and Montgomery and Peck (1982).
Equations 1 to 7 are applicable statewide. Data for 268 nonregulated rural stations having drainage areas ranging from 0.02 to 9,500 mi 2 and slopes from 0.74 to 229 ft/mi were used to develop the equations. The variables required to solve the equations are drainage area (A), slope (S), rainfall intensity (I) and regional factor (Rf).
Drainage area represents the area that contributes to direct surface run off, in square miles. Slope, in feet per mile, is the main-channel slope and is determined between points 10 percent and 85 percent of the total distance measured along the low-water channel from the site to the basin divide. Drainage area and slope are determined from topographic maps.
The rainfall intensity is the maximum 24-hour rainfall, in inches, expected to be equaled or exceeded on an average of once every 2 years.
11
Rainfall intensity (fig. 3) was obtained from Hershfield (1961). A constant of 2.5 was subtracted from the rainfall intensity to obtain the best fit to the linear regression equation.
The regional factor (table 3) removes regional bias and is dimensionless. The State is divided into four regions (fig. 4). The regions are the same as the areas defined in a previous study by Curtis (1977b).
Equations 1 to 7 may be used to improve the flood estimates at a gaged site. A procedure for weighting the flood estimates from the regional equa tions with the flood estimates from station data is provided in the Hydrology Subcommittee (1982) guidelines and in Curtis (1977a). This procedure is shown on page 6 and is based upon the assumption that the estimates are independent, which for practical purposes is true in mostj situations.
In table 1, the independent estimates of flood discharges were weighted using equation 8 to calculate the "best" flood estimates for the 268 stations used in the regional analysis.
Flood estimates for an ungaged site on a gaged stream may be improved by adjusting the ungaged site flood estimates with the flood estimates at the gaged site. Equation 11 provides a procedure for adjusting the site estimates.
SUMMARY
Equations, maps, tables, and graphs are^ presented to provide a means for estimating flood-peak discharges having recurrence intervals of 2, 5, 10, 25, 50, 100, and 500 years for nonregulated rural streams in Illinois. The flood- frequency equations may be used to estimate discharges on most streams ranging from 0.02 to 10,000 mi^ with slopes ranging from 0.7 to 230 ft/mi. A proce dure is provided for weighting independent estimates of discharge at a gaging station.
Graphical relations of station flood-peak discharges versus drainage area are presented for the regulated Big Muddy, Fox, and Illinois Rivers. For these streams, flood-peak discharges may be estimated for ungaged sites by interpola tion between stations on the basis of drainage area. Suggested procedures for estimating flood discharges on urban streams in northeastern Illinois and for transferring urban effect on stream estimates to other parts of Illinois are discussed.
Flood-frequency relations were defined for 394 gaged sites using the log-Pearson Type III frequency distribution and guidelines outlined by the Hydrology Subcommittee (1982). Two hundred pixty-eight (268) of the 394 sta tions were used in multiple regression analyses using a new improved procedure (G. D. Tasker, A. M. Lumb, W. O. Thomas, and K. M. Flynn, U.S. Geological Survey, written commun., 1987) to develop statewide estimating equations.
The regression analyses indicated that the independent variables drainage area (A), slope (S), rainfall intensity (I), and a regional factor (Rf) are the most significant for estimating flood peaks on Illinois streams. These
12
variables result in estimating flood-peak values with a standard error of model ranging from 34.9 to 50.3 percent. One estimating equation for each recurrence interval provides a straightforward technique for describing flood- peak discharges on both small and large streams in Illinois.
REFERENCES CITED
Alien, H. E. , Jr., and Bejcek, R. M., 1979, Effects of urbanization on the magnitude and frequency of floods in northeastern Illinois: U.S. Geological Survey Water-Resources Investigations 79-36, 48 p.
Cams, J. M. , 1973, Magnitude and frequency of floods in Illinois: Illinois Department of Transportation, Division of Water Resources Management, 599 p.
Curtis, G. W. , 1977a, Technique for estimating magnitude and frequency offloods in Illinois: U.S. Geological Survey Water-Resources Investiga tions 77-117, 70 p.
1977b, Frequency analysis of Illinois floods using observed and synthetic streamflow records: U.S. Geological Survey Water-Resources Investigations 77-104, 32 p.
Draper, N. R., and Smith, H., 1981, Applied regression analysis, 2nd ed.: John Wiley, New York, p. 241-257.
Ellis, D. W., 1968, Floodflows from small drainage areas in Illinois: prelimi nary flood-frequency relations: U.S. Geological Survey Open-File Report, 10 p.
Hardison, C. H., 1971, Prediction error of regression estimates of streamflow characteristics at ungaged sites: U.S. Geological Survey Professional Paper 750-C, p. C228-C236.
Hershfield, D. M., 1961, Rainfall frequency atlas of the United States: U.S. Weather Bureau Technical Paper 40, 115 p.
Hydrology Subcommittee of Interagency Advisory Committee on Water Data, 1982, Bulletin 17B, Guidelines for determining flood flow frequency: U.S. Geological Survey, Office of Water Data Coordination, Reston, Virginia, 183 p.
Johnston, J., 1972, Econometric methods: McGraw-Hill, New York.
Matalas, N. C., and Benson, M. A., 1961, Effects of interstation correlation on regression analysis: Journal of Geophysical Research, v. 66, no. 10, p. 3285-3293.
Matalas, N. C., and Gilroy, E. J., 1968, Some comments on regionalization inhydrologic studies: Water Resources Research, v. 4, no. 6, p. 1361-1369.
Mitchell, W. D., 1954, Floods in Illinois: magnitude and frequency: Illinois Department of Public Works and Buildings, Division of Waterways, 386 p.
Montgomery, D. C., and Peck, E. A., 1982, Introduction to linear regressionanalysis: John Wiley, New York, p. 216-243.
Moss, M. E., 1976, Design of surface water data networks for regionalinformation: Hydrological Sciences Bulletin, v. 21, no. 1, p. 113-127.
1979, Space, time, and the third dimension (model error): Water Resources Research, v. 15, no. 6, p. 1797-1800.
13
Moss, M. E., and Karlinger, M. R., 1974, Surface water network design byregression analysis simulation: Water Resources Research, v. 10, no. 3, p. 427-433.
Patterson, J. L., and Gamble, C. R. , 1968, Magnitude and frequency of floods in the United States, Part 5, Hudson Bay and Upper Mississippi River basin: U.S. Geological Survey Water-supply Paper 1698, 546 p.
Sauer, V. B., 1974, Flood characteristics of Oklahoma streams: U.S. Geological Survey Water-Resources Investigations 52-73, 301 p.
Speer, P. R., and Gamble, C. R., 1965, Magnitude and frequency of floods in the United States, Part 3-A, Ohio River basin except Cumberland and Tennessee Rivers basins: U.S. Geological Survey Water-supply Paper 1675, 630 p.
Stedinger, J. R., and Tasker, G. D., 1985, Regional hydrologic analysis, 1, ordinary, weighted, and generalized least squares compared: Water Resources Research, v. 21, no. 9, p. 1421-1432.
- 1986a, Correction to "Regional hydrologic analysis, 1, ordinary,weighted, and generalized least squares compared": Water Resources Research, v. 22, no. 5, p. 844.
1986b, Regional hydrologic analysis, 2, model-error estimators, estima tion of sigma and log-Pearson 3 distributions: Water Resources Research, v. 22, no. 10, p. 1487-1499.
Tasker, G. D., and Moss, M. E., 1979, Analysis of Arizona flood data network for regional information: Water Resources Research, v. 15, no. 6, p. 1791-1796.
Thomas, D. M., and Benson, M. A., 1970, Generalization of streamflow charac teristics from drainage-basin characteristics: U.S. Geological Survey Water-Supply Paper 1975, 55 p.
Wiitala, S. W., 1965, Magnitude and frequency of floods in the United States, Part 4, St. Lawrence River basin: U.S. Geological Survey Water-supply Paper 1677, 357 p.
14
Figures 1 to 9; Tables 1 to 5
cr>
EX
PLA
NA
TIO
N
Sta
tions
use
d in
the
reg
iona
l an
alys
es
A
Sta
tions
no
t us
ed i
n th
e re
gion
al a
naly
ses
Num
bers
are
ref
eren
ced
to t
able
s 1,
2.
and
5.
rab
Orc
hard
A.3
86.3
?
0 10
20
30
40
50
60
MIL
ES
I III
I I
I I
I20
40
60
80
10
0 K
ILO
ME
TE
RS
37
Fig
ure
1. S
tream
flow
data
-colle
ction sites
in Illin
ois
, In
dia
na,
and
Wis
consi
n.
42L
WISCONSI N
20 KILOMETERS
EXPLANATION
Stations used in the regional analyses
Stations not used in the regional analyses
Numbers are referenced to tables 1, 2, and 5.
215
Hickory Creek
Figure 2.--Streamflow data-collection sites in northeastern Illinois, northwestern Indiana, and southeastern Wisconsin.
18
Figure 3.--Distribution of rainfall intensity (24-hour 2-year) I, in inches, in Illinois (modified from Hershfield, 1961).
19
10 20 30 40 50 50 MILES I I I I I I
Figure 4. Geographic regions, R, in Illinois.
20
0.9
o
QZ
coZ LU
CJ
O oZo
LU DC
111 DC
0.8
0.7
0.6
0.5
0.4
10 15 20 25 30 40
RECURRENCE INTERVAL, IN YEARS
Figure 5. Regression constant and coefficients for estimatingb c equations, QT = a A S (I - 2.5) a Rf.
21
SelectQT to be
determined
yes
no
Gaging station best estimate of QT from table 1
Determine characteristics A, S, I, and Rf
for site
Compute QTusing
equations 1 to
Determine characteristics A, S, I, and Rf
for site
Obtain best estimateof QT for nearbygaging stationfrom table 1
Compute QTusing
equations 1 to 7
Computeweighted Qm using
equation 9
Final QT estimate
Figure 6.--Flow diagram for determining flood-peak discharge,
22
50,000
40,000
30,000
o oin COccHI Q_h- LU HI U_
O
CDD O
cc
XoCO
4,000
3,000300 400 600 800 1,000 2,000
DRAINAGE AREA, IN SQUARE MILES3,000 4,000
Figure 7.--Relation of flood-peak discharges for selected recurrence intervals to drainage area, Big Muddy River, since 1970.
23
40,000
30,000
Q 20,000
o oUJ CO
cc.LU D_I- LU LU LL
O
COD O
LU
O CO
10,0009,000
8,000
7,000
6,000
5,000
4,000
3,000
2,000400
100-year flood* i i i
50-year flood I I I _
25-year flood
10-year flood*
5-year flood p
2-year flood
600 800 1,000 2,000 DRAINAGE AREA, IN SQUARE MILES
3,000 4,000
Figure 8.--Relation of flood-peak discharges for selected recurrence intervals to drainage area, Fox River.
24
ouu,uuu
400,000
300,000
Q2 O OLLJ
£ 200,000LLJ Q.
LLJ LJJ U_
O
COID O2
m- 100,000
g 90,000
i 80,000o5 70 000
60,000
50,000
40,000
30,000 4,C
100-year f
V?
1CO«?:
i
CO CN=te*
ood *..
50-year flood25 y
10-y
5-y
2-y
ear f
Mear f
ear f
ear f
ood
ood
ood
ood
-
9
B
-
~ .
.
=
w>"o c
c 0
O)c
1 inO) CN
-L̂x^ xs^
9 ^s./ ̂./
/____
CO
'(/> O
T3
O
1
CO CO=te
\/-
/%
^
)00 6,000 8,000 10,000 20,000 40,0
DRAINAGE AREA, IN SQUARE MILES
Figure 9.--Relation of flood-peak discharges for selected recurrence intervals to drainage area, Illinois River.
25
Table
1. T-year pe
ak di
scha
rges
at ga
ging
stations
[T,
recurrence in
terv
al in years;
ftp,
di
scah
rge
in cubic
feet
pe
r second fo
r a
give
n re
curr
ence
interval of 2-,
5-,
10-, 25-, 50-, or 100-year fl
ood.
Th
e upper
numb
ers
are
valu
es of
Qj
> fr
om st
atio
n fr
eque
ncy
curv
es.
The
middle
numb
ers
are
values of
Q
computed using
regression eq
uati
ons.
Th
e lower
numb
ers
are
valu
es of the weighted or
best estimated fr
eque
ncy
curv
e and
were obtained by
weighting th
e st
atio
n an
d regression eq
uati
on cu
rves
.Stations noted
by an
asterisk (*)
have an
omal
ous
characteristics
and were omitted from the
regi
onal
anal
yses
. Dashes indicate th
at th
e fr
eque
ncy
value
is no
t co
mput
ed.]
Map
S
tati
on
No.
N
o.
1 03336100
2 03
33
65
00
3 03336900
4 *
03
33
70
00
5 0
33
37
50
0
6 03338000
7 03338100
8 03338500
9 03338800
Sta
tion
na
me
and lo
cati
on
Big
F
our
Dit
ch
tr
ibuta
ry
near
Paxto
n,
11
1.
Lat
40°2
7'1
5",
lo
ng
88-0
9'
10",
in
N
wV
fcN
Wl/i
se
c.
14
, T
.23
N
. ,
R.9
E
. ,
Ford
C
ou
nty
.
Blu
eg
rass
C
reek
at
Po
tom
ac,
ill.
L
at
40
°19
'19
",
long
87
«4
8t0
2",
in
SE
V4N
E1/
4 se
c. 34,
T.2
2
N.,
R.
13
W.
, V
erm
ilio
n C
ounty
.
Salt
F
ork
near
St.
Jo
seph,
11
1.
Lat
40°0
8'5
5",
lo
ng 88°0
2'0
0",
in
N
wV
lSE
l/4
sec.
35,
T.2
0
N.
, R
.10 E
.,
Cham
pai
gn
Co
un
ty.
Boney
ard
Cre
ek at
Urb
ana,
1
11
. L
at
40°0
6'4
0",
lo
ng
88°1
3'3
5",
in
NW
1/lN
El/
4 se
c.
18
, T
.19
N
. ,
R.9
E
. ,
Ch
amp
aig
n C
ounty
.
Sali
ne
Bra
nch
at
Urb
ana,
1
11
. L
at
40°0
7'1
2",
lo
ng
88°1
1'4
1",
in
N
EV
4SW
1/4
sec. 9
, T
.19
N
. ,
R.9
E
. ,
Cham
pai
gn
County
.
Salt
F
ork
near
Hom
er,
111.
Lat
40«03'2
0",
lo
ng
87«57'3
0",
in
SW
V4S
W1/
4 se
c. 33,
T.1
9
N.
, R
.14
W.
, C
ham
pai
gn
C
ounty
.
Salt
F
ork
tr
ibu
tary
n
ear
Catl
in,
111.
Lat
40°0
3I5
5",
lo
ng
8
7«
46
'05
",
in
SE1/l
NE
V4
sec.
36,
T.1
9
N.
, R
.I 3
W
. ,
Verm
ilio
n
Co
un
ty.
Verm
ilio
n
Riv
er
near
Catl
in,
11
1.
Lat
40°0
6'0
9",
lo
ng
87
«4
2'5
8",
in
SE
1/IS
EV
4
sec.
16,
T.1
9
N.
, R
. 12
W
. ,
Verm
ilio
n
Co
un
ty.
Nort
h
Fo
rk
Verm
ilio
n
Riv
er
trib
uta
ry
near
Dan
vil
le,
11
1.
Lat
40°1
4'2
3",
lo
ng
87°3
8f4
0",
in
N
EV
4NE
1/4
sec.
36,
T.2
1
N.
, R
.12
W.
, V
erm
ilio
n
Co
un
ty.
Q2 11
7 10
5 11
5
1,8
50
1,0
60
1,7
50
2,4
90
2
,74
0
2,5
20
46
9
1,2
80
1
,12
0
1,2
70
3,7
60
4,2
90
3
,79
0
195
177
193
8,4
70
9
,86
0
8,6
50
290
168
266
Qs 183
185
183
2,8
70
1,7
80
2,7
20
3,7
10
4,5
30
3,8
30
580
2,0
20
1,8
10
2,0
00
5,6
60
6,9
20
5
,75
0
37
6
30
9
36
6
14,5
00
15
,90
0
14,7
00
53
7
301
472
QIO 22
5
241
228
3,5
60
2,2
60
3,3
60
4,5
70
5,7
50
4
,76
0
64
7
2,5
00
2,2
60
2,4
80
6,8
90
8,6
70
7,0
50
501
401
48
3
19
,00
0
20,0
00
19
,20
0
74
0
39
5
63
2
22
5 275
312
281
4,4
50
2,8
80
4,1
70
5,7
10
7
,28
0
6,0
10
726
3,0
90
2,8
20
3,0
60
8,3
80
10,9
00
8,6
30
655
518
62
8
25,3
00
25
,00
0
25,2
00
1,0
40
519
859
QSO 31
0 36
6 32
0
5,1
10
3,3
30
4,7
80
6,6
20
8,4
10
6,9
80
780
3,5
10
3
,23
0
3,4
80
9,4
40
12,4
00
9,7
70
764
604
731
30,4
00
28
,70
0
30
,00
0
1,2
90
612
1,0
40
QIOO 34
3 4
18
3
56
5,7
50
3
,78
0
5,3
70
7,5
30
9,5
30
7,9
60
83
3
3,9
10
3,6
20
3,8
70
10,5
00
14
,00
0
10
,90
0
86
5
69
0
82
8
35,8
00
32,4
00
34,8
00
1,5
70
705
1,2
50
Table 1. T-year peak discharges at gaging stations Continued
Map
N
o.
10 11 12 13 14 15 16 17 18 19 20
Sta
tio
n
No.
03339000
03
34
17
00
03
34
19
00
033
43
40
0
03
34
40
00
03
34
42
50
03
34
44
25
03
34
45
00
03
34
55
00
03
34
60
00
03
37
80
00
Sta
tion
nam
e an
d lo
cati
on
Verm
ilio
n
Riv
er
near
Dan
vil
le,
111.
Lat
40
°06
'03
",
long
87»35
I52
",
in
NW
l/4N
Wl/4
se
c.
22,
T.1
9
N.
, R
. 11
W
., V
erm
ilio
n
Co
un
ty.
Big
C
reek
tr
ibu
tary
n
ear
Dudle
y,
11
1.
Lat
39033'5
5M
, lo
ng
87»47
I25",
in
SW
1/4N
W1/
4 se
c.
19,
T.1
3
N.
, R
.I 2
W
., E
dgar
C
ounty
.
Rac
coon
Cre
ek tr
ibu
tary
n
ear
Annapoli
s,
111.
Lat
3900
8'3
6",
lon
g 87»41'1
0",
in
N
E1/
4NE
1/4
sec.
13,
T.8
N
. ,
R.1
2
W.,
C
raw
ford
C
ou
nty
.
Bm
bar
ras
Riv
er
near
Cam
argo,
ill.
L
at
39°4
7'3
0",
lo
ng
88°1
1'1
0",
in
N
El/f
cNW
l/l
sec. 3
, T
.15
N
. ,
R.9
E
. ,
Dougla
s C
ounty
.
Em
bar
ras
Riv
er
near
Dio
na,
111.
Lat
39
°20
'40
",
long
88°1
0'1
5",
in
N
E1/4
NW
V4
sec. 2
, T
.10
N.
, R
.9 E
.,
Cu
mb
erla
nd
C
ounty
.
Em
bar
ras
Riv
er
trib
uta
ry
near
Gre
enu
p,
11
1.
Lat
390
14
*0
0",
lo
ng
88°0
9'2
0",
in
N
W1/
4SW
V4
sec.
12,
T.9
N
.,
R.9
E
. ,
Cu
mb
erla
nd
C
ounty
.
Mud
dy
Cre
ek tr
ibu
rary
at
Woodbury
, 111.
Lat
39»11'5
8",
lo
ng
88°
17
' 38
",
in
NE1
/4N
W1/
4 sec. 27,
T.9
N
. ,
R.8
E
. ,
Cum
ber
land
Co
un
ty.
Ran
ge
Cre
ek
near
Cas
ey,
11
1.
Lat
39°
19 '3
6",
lon
g 8
8°0
1'4
6",
in
N
El/
fcS
El/
4 sec.
12,
T.1
0
N.
, R
. 10
E
.,
Cum
ber
land
County
.
Em
bar
ras
Riv
er
at
Ste
. M
arie
, 111.
Lat
38°5
6'1
0",
long
88
°01
'10
",
in
NW
l/^N
Wl/4
se
c.
30,
T.6
N
. ,
R.
14
W.
, Ja
sper
County
.
Nort
h
Fork
E
mbar
ras
Riv
er
near
Oblo
ng,
111.
Lat
39
°00
>37",
lo
ng
87«56'4
7",
in
N
W1/
4NW
1/4
sec.
35,
T.7
N
. ,
R.
14
W.
, C
raw
ford
C
ounty
.
Bo
np
as
Cre
ek at
Bro
wns,
111.
Lat
38°2
3'1
1",
lo
ng
87
°58
'32
",
in
NW
1/4S
EV
4 sec. 33,
T.I
S
.,
R.1
4
W.,
Wab
ash
County
.
22
13
,60
0
12
,70
0
13
,60
0
182
188
183 18
17
18
3,1
60
2,9
90
3,1
30
8,9
90
7,6
70
8,8
30 23
13
22 24
35
26
90
2
592
867
14
,00
0
12
,90
0
13
,90
0
7,3
60
6,0
70
7,2
80
2,9
10
4,1
80
2,9
80
QS
21,0
00
20,4
00
21,0
00
29
2
34
2
307 32
31
32
4,6
50
4,8
80
4,6
70
13,6
00
12,2
00
13
,40
0 38
24
35 49
67
54
1,6
30
1
,04
0
1,5
30
23,4
00
20,5
00
23,2
00
12,9
00
10,1
00
12
,70
0
4,0
30
6,8
90
4,2
40
QIO
26
,00
0
25,6
00
25
,90
0
37
6
45
4
401 41
4
2
41
5,5
20
6,1
40
5,5
80
16,8
00
15,1
00
16,5
00 49
31
45 72
90
77
2,2
20
1,3
60
2,0
50
30,3
00
25,6
00
30,0
00
16,9
00
12,8
00
16,6
00
4,7
60
8,7
30
5,1
10
Q2
5
32,2
00
32,1
00
32,2
00
49
2
601
531 53
56
54
6,4
90
7,7
10
6,6
50
21,0
00
18
,80
0
20,5
00 63
40
58 10
7 12
2 11
2
3,0
90
1,7
70
2,7
90
39,4
00
31,9
00
38,9
00
22,2
00
16
,30
0
21,5
00
5,7
00
11,0
00
6,2
20
Qso
36,8
00
36
,90
0
36
,80
0
587
714
634 62
67
63
7,1
30
8,8
70
7,3
60
24,2
00
21,4
00
23,5
00 75
46
68 13
7 14
6 14
0
3,8
30
2,0
80
3,4
00
46,7
00
36
,60
0
45,8
00
26
,10
0
18,9
00
25
,20
0
6,4
10
1
2,8
00
7
,06
0
2100
41,4
00
41,6
00
41,4
00
68
9
82
8
740 71
77
72
7,6
90
10,0
00
8,0
20
27
,40
0
24
,00
0
26,5
00 87
53
78 17
2 17
1 17
2
4,6
30
2,4
00
4,0
70
54,1
00
41,0
00
53
,00
0
30,1
00
21,5
00
28,9
00
7,1
30
14,5
00
7,8
90
Table 1. T-year peak discharges at gaging stations Continued
to
00
Map
N
o. 21 22 23 24 25
26 27 28 29 30 31
Sta
tion
No.
03378635
03
37
86
50
03378900
03
37
89
80
03
37
95
00
03
37
96
50
03
38
03
00
03
38
03
50
03
38
04
00
03380450
03380475
Sta
tion
na
me
and
locati
on
Lit
tle
Wab
ash
Riv
er
near
Eff
ing
ham
, 111.
Lat
39°0
6'1
3",
lo
ng
88
°35
'33
",
in
NW
I/jN
Wl/4
se
c. 36,
T-8
N
.,
R.5
E
.,
Eff
ing
ham
C
ounty
.
Sec
on
d
Cre
ek tr
ibuta
ry at
Kep
tow
n,
11
1.
Lat
39°0
4'5
0",
lo
ng
88°3
9'5
5",
in
N
El/
jSW
l/j
sec.
5,
T.7
N
.,
R.5
E
. ,
Eff
ing
ham
C
ou
nty
.
Lit
tle
Wab
ash
Riv
er
at
Louis
vil
le,
11
1.
Lat
38°4
6'2
3",
lo
ng
88°2
9'5
0",
in
N
W1/
4SE
1/4
sec.
23,
T.4
N
.,
R.6
E
.,
Cla
y
County
.
Lit
tle
Wab
ash
Riv
er
trib
uta
ry at
Cla
y C
ity,
111.
Lat
38°4
0'4
6",
long 8
8°2
0'5
3",
in
N
Wl/4
sw1/
4 se
c.
20,
T.3
N
. ,
R.8
E
.,
Cla
y
Co
un
ty.
Lit
tle
Wab
ash
Riv
er
bel
ow
C
lay
C
ity
, 1
11
.L
at
38°3
8'0
5",
lo
ng
88°1
7'5
0",
in
N
E1/
4SE
1/4
sec.
3,
T.2
N
.,
R.8
E
. ,
Cla
y
County
.
Mad
den
Cre
ek
near
Wes
t S
alem
, 1
11
.L
at
38e
32I15",
lo
ng
88
°03
'25
",
in
SW
l/4N
Wl/4
se
c.
12,
T.1
N
.,
R.1
0
E.,
E
dw
ards
County
. ~~
~
Dum
s C
reek
tr
ibuta
ry
near
luk
a,
11
1.
Lat
38°3
7'3
5",
lo
ng
88
049
'20
",
in
NE
1/4S
W1/
4 se
c.
12
,T
.2
N.
, R
.3
E.,
M
ario
n
Co
un
ty.
Sk
ille
t F
ork
near
luk
a,
111.
Lat
38°3
1'1
0",
lo
ng
8804
3'3
9",
in
SE1/
4SW
1/4
sec.
14
,T
.1
N.,
R.4
E
.,
Mar
ion
County
.
Ho
rse
Cre
ek tr
ibuta
ry
near
Cart
ter,
111.
Lat
38
°3T
10
",
lon
g 88°5
1'5
0",
in
SW
1/4S
W1/
4 se
c.
15
,T
.1
N.
, R
.3
E.
, M
ario
n
Co
un
ty.
Wh
ite
Feath
er
Cre
ek
near
Mar
low
, 1
11
.L
at
38°2
0'4
0",
lo
ng
88°4
6'5
0",
in
N
WI/
jNE
l/j
sec. 20,
T.2
S
.,
R.4
E
.,
Jeff
ers
on
County
.
Ho
rse
Cre
ek
near
Kee
nes
, 111.
Lat
38°2
2'3
4",
lo
ng
88°3
914
4",
in
N
W1/
4SW
1/4
sec. 4,
T.2
S
. ,
R.5
E
. ,
Way
ne
County
.
Q2 5,4
10
5,3
80
5,4
00
230
212
22
6
11
,50
01
0,3
00
11,3
00
131
129
131
13,0
00
12,5
00
12,9
00
413
284
38
8 42 46 43
5,0
00
3,8
50
4,8
10
222
232
22
5
135
166
140
3,7
20
2,7
40
3,6
00
Q5 7,3
30
8,9
90
7,6
20
386
38
038
5
17
,40
016,9
00
17,3
00
242
240
242
22,8
00
20,3
00
22,6
00
66
452
062
5 66 89 70
9,0
20
6,3
40
8,4
70
366
427
385
206
316
224
5,5
20
4,6
10
5,3
70
QIO
8,5
30
11,5
00
9,1
00
50
55
00
50
4
21,3
00
21
,30
02
1,3
00
321
32
43
22
30
,30
02
5,5
00
29
,90
0
85
56
92
80
5 82 122 90
12,0
00
8,0
20
11
,10
0
47
25
69
50
6
25
24
28
282
6,7
10
5,9
00
6,5
60
Q2
5
10
,00
014,7
00
11
,00
0
671
65
86
67
26,2
00
27,0
00
26,4
00
42
54
35
427
40
,70
032,
100
40,0
00
1,1
30
92
01
,06
0
104
165
116
16
,00
01
0,1
00
14
,40
0
61
57
59
66
8
31
058
135
7
8,2
20
7,5
30
8,0
90
Qso
11,0
00
17,1
00
12,4
00
80
77
76
79
6
29,6
00
31,2
00
30,0
00
502
521
506
49,1
00
36
,90
048,0
00
1,3
50
1,1
00
1,2
60
119
200
135
19,1
00
11,7
00
17,0
00
729
90
679
6
352
700
413
9,3
50
8,7
70
9,2
30
QIOO
12
,10
01
9,5
00
13,7
00
951
89
593
1
33
,10
035,3
00
33,6
00
578
60
85
86
57,8
00
41,7
00
56,2
00
1,5
80
1,2
70
1,4
80
136
235
155
22
,30
013,3
00
19,6
00
84
71
,05
09
27
39
48
24
46
9
10
,50
09,9
80
10,4
00
Tab
le
1.
T-y
ear
peak dis
charg
es
at
gagin
g sta
tions C
onti
nued
to
v£>
Map
N
o.
32
33 34
35
36
37
38
39
40
41
42
Sta
tion
No.
03
38
05
00
03
38
15
00
033
81
60
0
033
82
02
5
03
38
21
00
03
38
21
70
*03382500
03382510
03
38
25
20
03
38
44
50
03
38
50
00
Sta
tion
nam
e an
d lo
cati
on
Sk
ille
t F
ork
at
Way
ne C
ity
, 111.
Lat
3802
1'2
5",
lon
g
88°3
5'0
0",
in
S
Wl/
jSW
l/j
sec.
7,
T.2
S
.,
R.6
E
.,
Way
ne
County
.
Lit
tle
Wab
ash
Riv
er
at
Car
mi,
111.
Lat
38°0
3'4
0",
lo
ng
88°0
9'3
5",
in
N
W1/
4SE
1/4
sec. 2
5,
T.5
S
.,
R.9
E
.,
Whit
e C
ou
nty
.
Lit
tle
Wab
ash
Riv
er
trib
uta
ry
near
New
H
aven
, 1
11
.L
at
37°5
5'5
0",
lo
ng 8
8°0
9'5
5",
in
H
E 1/
4 SW
1/4
se
c.
12,
T.7
S
.,
R.9
E
.,
Wh
ite
Co
un
ty.
Lit
tle S
ali
ne
Cre
ek tr
ibuta
ry
near
Go
rev
ille
, 111.
Lat
37
«3
6'2
8M
, lo
ng
88
°58
'44
",
in
SW1/
4NW
1/4
sec. 34,
T.1
0 S
.,
R. 2
E
.,
Wil
liam
son
County
.
South
F
ork
S
ali
ne
Riv
er
near
Carr
ier
Mil
ls,
111.
Lat
37°3
8'1
6",
lo
ng
88°4
0'4
0",
in
SW1/
4NE
1/4
sec.
20
,T
.10
S
. ,
R. 5
E
.,
Sali
ne
County
.
Bru
shy
C
reek
near
Harc
o,
111.
Lat
37
°46
'30
",
lon
g
88
«3
9'0
8",
in
N
W1/
4NW
1/4
sec. 3
,T
.9 S
.,
R.5
E
.,
Sali
ne
Co
un
ty.
Sali
ne
Riv
er
near
Juncti
on,
11
1.
Lat
37«4
1I5
2",
lo
ng 8
8°1
6'0
0",
in
N
E1/
4 sec. 36,
T.9
S
.,
R.8
E
. ,
Gall
ati
n C
ounty
.
Eag
le
Cre
ek near
Equali
ty,
11
1.
Lat
37
°39
I03",
lo
ng
8
8°2
3'2
8",
in
N
E1/
4SE
1/4
sec.
14,
T.1
0
S.,
R.7
E
. ,
Sali
ne C
ounty
.
Bla
ck
Bra
nch
tr
ibu
tary
near
Juncti
on,
111.
Lat
37»4
1 '1
3",
lon
g
88°
16' 5
5",
in
N
El/
4 sec. 2,
T.1
0
S.
, R
.8 E
.,
Gall
ati
n
Co
un
ty.
Lusk
C
reek
near
Eddyvil
le,
111.
Lat
3702
8'2
0",
lon
g 8
8°3
2'5
0",
in
N
Wl/4
SE
l/4
sec.
16,
T.1
2
S.,
R.6
E
. ,
Pope
County
.
Hay
es
Cre
ek at
Gle
ndale
, 111.
Lat
37°2
7'2
5H
, lo
ng
88°4
0'0
5",
in
SW
1/4S
W1/
4 sec. 2
1,
T.1
2
S.,
R.5
E
.,
Po
pe
Co
un
ty.
Q2
8,2
60
6,5
30
8,1
80
14,5
00
21,3
00
14,8
00 89 71 85
273
179
254
2,8
70
3,8
80
2,9
90
1,1
30
89
51,0
80
10,9
00
525
89
958
5
156
187
163
5,6
10
2,7
90
4,9
90
2,2
40
1,6
80
2,1
80
25
14
,30
01
0,6
00
14,0
00
21,7
00
33,8
00
22,5
00
157
135
150
356
310
345
3,9
00
5,9
80
4,2
00
1,5
50
1,4
40
1,5
20
17,3
00
60
01
,48
073
1
305
313
30
8
8,5
30
4,5
20
7,2
90
3,7
20
2,7
60
3,5
70
2lO
18,7
00
13,4
00
18,3
00
26,9
00
42,1
00
28,1
00
211
182
201
40
84
05
40
7
4,5
50
7,3
80
5,0
00
1,8
40
1,8
10
1,8
30
22,2
00
63
81
,88
08
28
431
39
94
20
10
,70
05,7
10
8,9
50
4,8
60
3,5
10
4,6
10
22
5
24,9
00
16,9
00
24,2
00
33,8
00
52,2
00
35,6
00
289
247
27
4
471
52
84
86
5,3
10
9,1
20
5,9
80
2,2
10
2,2
70
2,2
30
28,9
00
67
92
,40
09
44
61
551
157
5
13
,50
07
,24
01
1,2
00
6,4
70
4,4
80
6,0
50
25
0
29,7
00
19
,50
028,7
00
39,2
00
59,8
00
41,4
00
353
297
333
516
62
454
5
5,8
60
10,4
00
6,6
80
2,5
00
2,6
20
2,5
40
34,2
00
705
2,8
00
1,0
20
773
593
701
15,8
00
8,4
10
12,9
00
7,7
80
5,2
00
7,2
30
QIOO
34,7
00
22,0
00
33,3
00
44,8
00
67
,10
047,3
00
42
33
49
39
5
561
71
960
1
6,3
80
11
,60
07,3
60
2,7
90
2,9
60
2,8
50
39,9
00
_
728
3,1
90
1,0
90
94
66
76
83
6
18
,20
09,5
50
14
,80
0
9,2
00
5,9
30
8,4
70
Table 1. T-year peak discharges at gaging stations Continued
U)
O
Map
N
o. 43 44
45
46
47
48
49 50 51 52 53
Sta
tion
No.
03
38
55
00
*0
33
86
50
0
03
61
20
00
03
61
22
00
03614000
04
08
73
00
04087400
054
14
82
0
05
41
50
00
054
15
50
0
054
18
75
0
Sta
tion
nam
e an
d lo
cati
on
Lak
e G
len
dale
In
let
near
Dix
on
S
pri
ngs,
111.
Lat
37°2
4'5
5",
lo
ng
88°3
9'0
0",
in
N
El/
jSW
l/j
sec.
3,
T.1
3 S
.,
R.5
E
.,
Pope
C
ounty
.
Sugar
Cre
ek
near
Dix
on
Sp
rin
gs,
1
11
.L
at
37
°24
'56
",
long
88°4
0'2
5",
in
N
WI/
jSW
l/j
sec. 4
,T
.13
S
.,
R.5
E
.,
Pop
e C
ounty
.
Cac
he
Riv
er
at
Form
an,
11
1.
Lat
37
°20
'11
",
long 88°5
5'2
6",
in
N
E1/4
NW
1/1
sec. 6
,T
.14
S
.,
R.3
E
.,
Johnso
n
Co
un
ty.
Q d
itch
tr
ibuta
ry
near
Choat,
1
11
.L
at
37013' 10",
lo
ng
88
°48
'00
",
in
NW
1/4N
W1/
4 sec.
17,
T.1
5
S.
, R
.4
E.
, M
assa
c C
ounty
.
Hes
s B
ayou
tr
ibuta
ry
near
Mou
nd C
ity
, 1
11
.L
at
37°0
8'1
1",
lo
ng
89
°08
'31
",
in
NE
1/4S
E1/
4 se
c. 7
,T
.16
S
.,
R.
1 E
.,
Pula
ski
Co
un
ty.
Lak
e M
ich
igan
tr
ibuta
ry at
Win
thro
p
Harb
or,
111.
Lat
42°2
9110",
lo
ng
87
°49
'20
",
in
SW
l/js
Wl/
j se
c.
3,
T.4
6
N.
, R
.12
E.
, L
ake
County
.
Kell
ogg
Rav
ine
at
Zio
n,
111.
Lat
42
°28
'02
",
long
87°4
9'2
9",
in
SW
1/4N
W1/
4 se
c.
15,
T.4
6
N.
, R
.12
E.
, L
ake
Co
un
ty.
Sin
sin
aw
a
Riv
er
near
Men
ora
inee
, 111.
Lat
42°2
8'4
4",
lo
ng
90°2
9'1
0",
in
S
El/
jSE
l/j
sec. 28,
T.2
9
N.
, R
. 1
W.,
Jo
Davie
ss
Co
un
ty.
Gale
na
Riv
er
at
Bun
com
be,
Wis
.L
at
42
°30
'49
",
lon
g
90
°22
'40
",
in
SW1/
4 se
c.
33
,T
.1
N.,
R.
1 E
. ,
Lafa
yett
e
Co
un
ty.
East
F
ork
G
alen
a R
iver
at
Council
H
ill,
1
11
.L
at
42°2
8'0
5",
lo
ng
9002
0'2
0",
in
SW1/
4NW
1/J
sec.
31,
T.2
9
N.
, R
.2
E.
, Jo
D
avie
ss
Co
un
ty.
South
F
ork
A
pple
R
iver
near
Nora
, 1
11
.L
at
42°2
5'3
5",
lo
ng
89°5
7I5
0",
in
N
W1/
4NW
1/4
sec.
17
,T
.28
N
. ,
R.5
E
. ,
Jo
Davie
ss
Co
un
ty.
Q2 58
24
27
553
1,4
40
3,8
20
4,6
30
3,8
50
137
144
138
45
431
24
18 80 102 83
233
134
21
6
2,9
90
1,9
00
2,7
70
4,7
30
3,6
70
4,6
60
1,9
80
1,5
40
1,9
20
208
235
213
25 93
57
55
89
9
1,8
90
6,2
50
7,0
50
6,3
00
225
256
233
597
52
057
3
147
176
153
40
92
19
361
5,7
00
3,2
80
5,0
10
7,7
10
6,2
20
7,5
00
4,1
70
2,7
30
3,8
80
362
421
372
QIO
1,1
70
99
51,1
40
2,2
00
7,9
40
8,5
90
7,9
80
292
337
304
690
66
568
1
202
227
208
552
275
467
8,0
00
4,2
70
6,7
50
10
,20
08,0
00
9,7
70
6,1
80
3,5
90
5,5
60
46
955
348
5
22
5
1,4
70
1,3
20
1,4
40
2,6
00
10
,10
01
0,5
00
10
,10
0
38
54
46
40
2
80
485
18
20
284
290
28
6
76
234
361
1
11
,50
05,5
30
9,2
30
13
,80
01
0,3
00
13
,10
0
9,4
40
4,7
30
8,1
30
60
47
26
63
0
QSO
1,6
90
1,5
70
1,6
70
2,9
10
11
,70
01
1,9
00
11,7
00
459
531
480
887
991
925
356
337
350
940
391
726
14,5
00
6,5
00
11,3
00
17,0
00
12,0
00
15
,90
0
12,4
00
5,6
00
10,4
00
701
857
736
QIOO
1,9
10
1,8
30
1,8
90
3,2
20
13
,40
01
3,3
00
13,4
00
538
617
560
96
81,1
30
1,0
30
437
383
419
1,1
40
437
84
9
17,8
00
7,4
50
13
,50
0
20
,70
013,7
00
19,1
00
16,0
00
6,4
70
13,0
00
798
98
98
39
Table 1. T-year peak discharges at
gaging stations Continued
Map
No. 54 55
56
57
58
59
60 61 62 63
64
Station
No.
05418800
05419000
05420000
05430500
05431500
05434500
05435000
05435500
05435650
05436500
05436900
Station na
me and location
Mill Creek tributary near Scales Mound, 111.
Lat 42°27
110", long 90°15'10", near center of
sec.
2,
T.28 N.,
R.2
E. ,
Jo Daviess County.
Apple River near Ha
nove
r, 111.
Lat 42
015'05",
long gO-MT'lO", in NE
1/4N
W1/4
sec. 16,
T.26 N.
, R.
2 E. ,
Jo Daviess County.
Plum River below Carroll Creek near Savanna, 111.
Lat 42°06'50", long 90°05'35n
, in
NW1/4SW1/4 se
c. 31,
T.25 N.
, R.4
E. ,
Carroll County.
Rock River at
Afton,
Wis.
Lat 42°36'33", long 89
004*14",
in NE1/4
sec.
28,
T.2 N.
, R. 12
E.,
Rock
County.
Turtle Creek near Cl
into
n, Wis.
Lat 42°35
147"
, long 88
-51 '50",
in SE
1/4
sec.
29,
T.2 N.
, R.
14
E. ,
Rock Co
unty
.
Pecatonica River at Martintown, Wi
s.
Lat 42030
'34"
, long 89°47'58", in SE
1/4
sec. 32,
T.1
N. ,
R. 6 E.,
Green County.
Cedar Creek near Winslow, 111.
Lat 42°28'00", long 89°50'02", in SE
1/4N
E1/4
se
c. 32,
T.29N., R.6E., Stephenson County.
Pecatonica River at
Freeport, 111.
Lat 42°18'13", long 89°36'57", in SE1/4
sec.
30,
T.27 N.
, R.8
E. ,
Stephenson Co
unty
.
Lost Creek tributary ne
ar sh
anno
n, 111.
Lat 42° 10' 10", long 89°44'45", in SE
1/4S
E1/4
sec. 12,
T.25 N.
, R.6
E.,
Carroll County.
Sugar River near Brodhead, Wis.
Lat 42°36'42", long 89°23
153"
, in
SW1/4
sec.
26,
T.2 N.
, R.9
E. ,
Ro
ck Co
unty
.
Otter Creek tributary ne
ar Durand, 111.
Lat 42°28'10", long 89°19'25", in SE1/4NE1/4 sec. 34,
T.29 N.
, R. 10
E.,
Winnebago County.
Q2 25
5 255
255
5,260
6,180
5,310
3,530
4,570
3,610
6,410
9,380
6,490
2,070
1,90
0 2,060
5,700
7,740
5,790
105
186
114
5,730
9,290
5,820
285
217
270
3,520
5,310
3,580 51
122 60
Qs 434
482
445
7,780
10,4
00
7,980
5,930
7,590
6,100
8,970
14,000
9,120
4,110
3,000
4,020
9,080
12,2
00
9,290
293
335
299
9,250
14,6
00
9,460
402
386
398
6,440
8,510
6,530 97
225
119
QIO 564
652
585
9,530
13,400
9,860
7,710
9,660
7,930
10,500
16,900
10,800
5,780
3,710
5,560
11,500
15,200
11,800
478
442
471
11,900
18,100
12,200
478
506
485
8,670
10,600
8,770
136
300
168
Q25
736
881
773
11,700
17,2
00
12,3
00
10,1
00
12,3
00
10,400
12,4
00
20,400
12,7
00
8,180
4,570
7,710
14,7
00
18,700
15,100
773
582
731
15,4
00
22,400
15,8
00 571
662
597
11,8
00
13,200
11,900
193
400
238
Qso 869
1,060
916
13,5
00
20,100
14,1
00
12,0
00
14,200
12,300
13,6
00
22,800
14,1
00
10,2
00
5,190
9,420
17,200
21,400
17,600
1,040
689
953
18,2
00
25,500
18,7
00 638
780
681
14,2
00
15,1
00
14,300 243
476
296
2lOO
1,00
0 1,
240
1,06
0
15,1
00
23,000
16,0
00
13,900
16,1
00
14,3
00
14,9
00
24,900
15,3
00
12,3
00
5,770
11,200
19,700
23,900
20,200
1,33
0 794
1,190
21,200
28,500
21,800
705
897
762
16,8
00
17,0
00
16,8
00 296
553
358
Tabl
e 1. T-year pe
ak di
scha
rges
at
gaging stations Continued
U>
to
Map
N
o. 65
66
67
68
69
70
71 72
73
74
75
Sta
tio
n
No.
05
43
70
00
05
43
75
00
05
43
76
00
05
43
79
50
05438250
05438300
05
43
83
90
05
43
85
00
05
43
88
50
05439000
05
43
95
00
Sta
tion
nam
e an
d lo
cati
on
Pecato
nic
a
Riv
er
at
Shir
lan
d,
111.
Lat
42°2
6'1
0H
, lo
ng
8
9°1
1'5
0",
in
SW
1/4
sec.
11,
T.2
8
N.,
R
.11
E
.,
Win
neb
ago
Co
un
ty.
Roc
k R
iver
at
Ro
ckto
n,
11
1.
Lat
42
°26
'55
",
lon
g
8900
4'1
1",
in
SW1/
4NE
1/4
sec. 24,
T.4
6 N
.,
R.
1 E
.,
Win
neb
ago
Co
un
ty.
Roc
k R
iver
trib
uta
ry
near
Rock
ton,
111.
Lat
42°2
3'0
0",
lon
g 89°0
5'5
0",
in
S
E1/
4SE
1/4
sec.
10,
T.4
5
N.
, R
. 1
E.,
W
inneb
ago
Co
un
ty.
Kis
hw
auk
ee
Riv
er
near
Hu
nt l
ey
, 111.
Lat
42
°13
'47
",
long
88C2
5'2
1",
in
SE1/
4SW
1/4
sec. 4
, T
.43
N
. ,
R.7
E
. ,
McH
enry
C
ounty
.
Coo
n C
reek
at
Ril
ey,
11
1.
Lat
42
°10
'58
",
long 88°3
8'2
8",
in
SE
1/4S
W1/
4 se
c.
22
, T
.43
N.
, R
.5
E.
, M
cHen
ry
Co
un
ty.
Law
ren
ce
Cre
ek tr
ibuta
ry
near
Harv
ard
, 1
11
. L
at
42°2
7I3
0",
lo
ng 88°3
6'1
0",
in
S
El/
jSW
l/i
sec.
13,
T.4
6
N.
, R
.5
E.,
M
cHen
ry
County
.
Pis
casa
w
Cre
ek
bel
ow
M
okel
er
Cre
ek
near
Cap
ron,
111.
Lat
42
°23
'08
",
long
88
°41
'49
",
in
NE1
/4N
W1/
4 se
c.
18
, T
.45
N.,
R
.5
E.
, M
cHen
ry
County
.
Kis
hw
aukee
R
iver
at
Belv
idere
, 1
11
. L
at
42°1
5'2
2",
lon
g 88°5
1'5
0",
in
S
E1/
4SE
1/4
sec.
27,
T.4
4
N.,
R.3
E
.,
Boo
ne
County
.
Mid
dle
B
ranch
of
So
uth
B
ranch
K
ish
wau
kee
R
iver
near
Malt
a,
11
1.
Lat
41
°51
120
",
long 88°5
3'1
0",
in
N
E1/
4SE
1/4
sec.
16
, T
.39
N.
, R
.3
E.
, D
e K
alb
C
ounty
.
South
B
ranch
K
ishw
auk
ee
Riv
er
at
De
Kalb
, 111.
Lat
41°5
5>5
3",
lo
ng
88°4
5'3
5",
in
S
Wl/4
NE
l/4
sec. 2
2,
T.4
0
N.
, R
.4
E.
, D
e K
alb
C
ounty
.
South
B
ranch
K
ishw
aukee
R
iver
near
Fair
dale
, 1
11
. L
at
42°0
6'4
0",
lo
ng
88°5
4'0
0",
in
SW
1/4S
W1/
4 se
c.
16
, T
.42
N.,
R.3
E
.,
De
Kal
b
County
.
Q2
8,4
10
10
,20
0
8,5
10
14,7
00
12,6
00
14
,60
0
146
197
154
128
292
146
1,2
60
1,3
80
1,2
70 78
13
3 85
1,7
90
1,6
90
1,7
70
3,7
20
5
,33
0
3,7
80
146
163
148
794
1,0
80
83
4
3,9
30
2,9
30
3,8
70
25
12
,30
0
15,6
00
12
,50
0
21,2
00
18
,60
0
21,0
00
25
9
347
274
158
47
3
193
2,2
60
2,2
40
2,2
60
130
24
2
148
2,5
40
2,7
90
2,6
10
6,5
30
8,5
30
6,6
50
232
288
241
1,3
20
1,7
30
1,4
10
6,0
70
4
,59
0
5,9
80
QIO
14
,80
0
19
,10
0
15
,10
0
25,2
00
22,2
00
25,1
00
337
452
35
9
175
592
224
2,9
40
2,8
20
2,9
20
167
31
9
195
3,0
30
3,5
20
3,1
90
8,5
70
1
0,7
00
8,7
30
292
37
6
30
5
1,7
30
2,1
60
1,8
50
7,3
50
5,6
60
7,2
30
Q25
17,7
00
23
,20
0
18
,30
0
30,2
00
26,5
00
29
,90
0
43
3
58
7
46
6
193
73
5
26
3
3,7
80
3,5
20
3
,74
0
21
6
42
2
25
6
3,6
60
4,4
40
3,9
40
11,3
00
13,3
00
11,5
00
36
6
48
8
38
8
2,3
30
2,6
70
2,4
40
8,7
90
6,9
50
8,6
50
Qso
19
,90
0
26,1
00
20,5
00
33,7
00
29,4
00
33,3
00
502
68
9
543
20
5
83
8
290
4,3
90
4,0
40
4,3
30
254
49
9
303
4,1
40
5,1
10
4,5
10
13
,40
0
15
,20
0
13
,60
0
422
573
45
0
2,8
40
3,0
50
2,9
10
9,7
30
7,8
70
9,5
70
QIOO
21,9
00
28
,80
0
22,6
00
37,0
00
32,2
00
36,6
00
56
8
78
9
61
9
21
5
93
5
31
4
4,9
50
4,5
30
4,8
80
292
57
7
35
0
4,6
10
5,7
50
5
,06
0
15,5
00
17
,00
0
15
,60
0
47
6
65
6
511
3,4
00
3,4
00
3,4
00
10,6
00
8,7
50
10
,40
0
Table 1. T-year peak discharges at gaging stations Continued
U)
U)
Map
No. 76 77 78 79
80
81 82
83 84
85
86
Station
No.
05439550
05440000
05440500
05440650
05440900
05441000
05441500
05442000
05443500
05444000
05444100
Station name an
d location
South Branch Kishwaukee River tributary near
Irene, 111.
Lat 42°10'38
n,
long 88°56'50", in
SW
1/4N
E1/4
sec. 25,
T.43 N. ,
R.2
E. ,
Winnebago Co
unty
.
Kishwaukee River near Perryville, 111.
Lat 42°11'45", long 88°59'55", in
NE1/4NE1/4 sec. 21,
T.43 N. ,
R.2
E.,
Winnebago County.
Killbuck Creek near Monroe Center,
111.
Lat 42°05'55", long 89°03'10", in NW
1/4S
W1/4
sec. 19,
T.42 N.
, R.2
E.,
Ogle Co
unty
.
Stillman Creek tributary near Ho
lcom
b, 111.
Lat 42°03'48
n,
long 89°08
I36M
, in
NE
1/4N
W1/4
sec. 5,
T.41 N. ,
R. 1
E. ,
Ogle County.
Leaf River tributary near Forreston, 111.
Lat 42°07
I40",
long 89°31'20", in
NE
1/4N
W1/4
se
c. 36,
T.25 N.
, R.
8 E.
, Ogle Co
unty
.
Leaf River at
Leaf Ri
ver,
111.
Lat 42
007
'40"
, long 89°23'25", in
NW1/4
sec. 31,
T.25 N.
, R.10 E.,
Ogle County.
Rock River at Oregon,
111.
Lat 42°01'00", long 89°19'44
n, in
SE1/4NW1/4 sec. 3,
T.23 N. ,
R.10 E.,
Ogle County.
Kyte River near Flagg Ce
nter
, 111.
Lat 41°56'15", lo
ng 89°09'22", in
NW
1/JS
E1/4
se
c. 18,
T.40 N.
, R.1
E. ,
Ogle Co
unty
.
Rock River at
Como,
111.
Lat 41°47
I00"
, long 89°44'58", in NE
1/4N
E1/4
sec. 25,
T.21 N.
, R.6 E.,
Whiteside County.
Elkhorn Creek near Penrose, 111.
Lat 41
054'10",
long 89°41'40
n,
in SW1/4SE1/4 se
c. 9,
T.22 N.
, R.7
E.,
Whiteside Co
unty
.
Spring Creek tributary near Coleta,
111.
Lat 41°50'40", long 89°47
t39"
, in SE1/4SW1/4 se
c. 34,
T.22 N.
, R.6
E.,
Whiteside County.
Q2
81
185 93
7,190
8,850
7,280
2,420
2,270
2,400 81
117 86 55
62
56
2,810
2,610
2,790
21,500
21,500
21,500
1,260
2,040
1,370
24,700
23,200
24,600
3,050
2,600
3,020
274
239
265
Qs 191
329
213
11,9
00
14,1
00
12,100
4,320
3,740
4,270
143
207
155
104
116
106
5,210
4,370
5,140
33,000
32,400
32,800
1,740
3,340
2,050
35,600
34,900
35,600
4,540
4,270
4,520
481
436
468
QIO 289
432
317
15,100
17,500
15,200
5,560
4,730
5,480
191
271
208
145
157
148
6,950
5,580
6,820
40,900
39,200
40,500
2,050
4,220
2,520
42,200
42,400
42,200
5,450
5,380
5,450
630
578
614
Q25 441
564
469
18,900
21,800
19,100
7,030
5,970
6,920
256
353
280
207
213
208
9,200
7,130
8,970
51,400
47,300
50,100
2,440
5,300
3,130
49,500
51,300
49,500
6,500
6,790
6,520
822
767
805
Qso 57
0 66
2 593
21,6
00
24,9
00
21,9
00
8,04
0 6,890
7,910
309
415
336
262
255
260
10,9
00
8,260
10,6
00
59,3
00
53,1
00
57,300
2,73
0 6,100
3,580
54,3
00
57,5
00
54,6
00
7,21
0 7,820
7,260
968
912
951
QIOO 71
4 762
726
24,200
27,900
24,500
8,950
7,780
8,830
363
476
393
324
299
316
12,5
00
9,400
12,1
00
67,500
58,500
64,300
3,010
6,870
4,020
58,700
63,400
59,000
7,850
8,830
7,960
1, 110
1,
060
1,10
0
Table 1. T-year peak discharges at gaging stations Continued
Map
No. 87
88
89
90
91 92
93
94
95
96
97
Station
No.
05446000
05446500
05446950
05447000
05447050
*0 5447200
05447350
05447500
05448000
05448050
05466000
Station name and location
Rock Creek at Morrison, 111.
Lat 41°47'50
M,
long 89°58'20", in
NE1/4NW1/4 sec. 19,
T.21 N.
, R.5
E.,
Whiteside Co
unty
.
Rock River near Joslin,
111.
Lat 41°33'35H
, long 90° 10
*55"
, in NE1/4
sec.
18,
T.18 N. ,
R.3
E.,
Rock Island Co
unty
.
Green River tributary near Am
boy,
111.
Lat 41°45'30", long 89°20'10", in SE1/4SW1/4 sec. 34,
T.21 N.,
R.10 E.,
Lee County.
Green River at Amboy, 111.
Lat 41°42'35", lo
ng 89°19'28", in SE1/4NE1/4 se
c. 22,
T.20 N.
, R.10 E.,
Lee County.
Green River tributary No.
2 near Oh
io,
111.
Lat 41»39'13", lo
ng 89°27'21", in NWl/4
sec.
10,
T.19 N. ,
R.9
E. ,
Lee Co
unty
.
Normandy Ditch at Normandy, 11
1.Lat 41
033
150"
, long 89°39'20", in SW1/4NE1/4 se
c. 11,
T.18 N.
, R.7
E.,
Bureau County.
Mud Creek tributary near Atkinson, 111.
Lat 41°20'42
tt,
long 90°02
138",
in NE1/4SW1/4 se
c. 28,
T.16 N. ,
R.4
E.,
Henry County.
Green River near Geneseo, 11
1.Lat 41°29
>20M
, long 90°09'30", in NE1/4SW1/4 se
c. 4,
T.17 N.
, R.3
E.,
Henry Co
unty
.
Mill Creek at Milan, 111.
Lat 41°26'32", long 90
033'21
tt, in NW1/4NE1/4 sec. 25,
T.17 N.
, R.2
W.,
Rock Island County.
Sand Creek near Milan, 11
1.Lat 41»24'05", long 90
036'20", in SE1/4SE1/4 sec. 4,
T.16 N.
, R.2
W. ,
Rock Island County.
Edwards River near Orion, 111.
Lat 41°16
t20",
long 90°22
I40"
, in N
E1/4SEl/4
sec. 21,
T.15 N.
, R.1
E. ,
Henry County.
Q2
2,050
2,580
2,080
22,900
31,800
23,300 88
130
95
2,860
2,740
2,850
146
385
178
47
190
178
187
5,890
9,250
6,040
2,780
2,180
2,740 36 72 40
3,370
2,830
3,330
Qs 2,900
4,210
3,010
33,400
48,500
34,100
200
242
211
4,340
4,430
4,350
233
675
314 72
329
321
326
8,240
14,800
8,510
5,040
3,710
4,910 79 136
89
4,760
4,850
4,780
QIO
3,480
5,280
3,670
39,900
59,300
41,000
308
323
313
5,220
5,550
5,250
297
879
419 89
442
424
436
9,570
18,500
10,000
6,670
4,760
6,470
120
182
132
5,560
6,310
5,610
°-25
4,240
6,640
4,530
47,600
72,400
49,200
488
432
467
6,210
6,930
6,270
384
1,14
0560
109
611
557
590
11,100
23,100
11,700
8,790
6,120
8,470
186
244
199
6,430
8,200
6,560
Qso
4,810
7,620
5,180
53,000
81,800
55,100
658
515
603
6,850
7,940
6,950
452
1,34
066
7
123
755
659
716
12,0
0026,400
12,800
10,4
007,140
9,980
247
292
258
6,980
9,660
7,190
QIOO
5,400
8,590
5,820
58,100
91,000
60,500
861
600
755
7,450
8,930
7,590
524
1,540
776
136
918
762
851
12,9
0029,700
13,9
00
12,0
008,150
11,5
00 317
340
323
7,480
11,1
007,780
Table 1. T-year peak discharges at gaging stations Continued
w
Hap
No. 98
99
100
101
102
103
104
105
106
107
108
Station
No.
05466500
05467000
05467500
05468000
05468500
05469000
05469500
05469750
05495200
05495500
05496900
Station name and location
Edwards River near New Bo
ston
, 11
1.Lat 41°11'15", long 90°58'05", at quarter corner
between se
es. 21 and 28,
T.14 N.
, R.5
W. ,
Mercer County.
Pope Creek near Keithsburg, 111.
Lat 41»07'42", long 90
055'10", in SEl/4SE
l/4
sec. 11,
T.13 N.,
R.5
W.,
Mercer County.
Henderson Creek near Little York,
111.
Lat 41°02'35", long 90°44'45", between sees. 8 and
9, T.12 N.
, R.3
W. ,
Warren County.
North Henderson Creek near Seaton,
111.
Lat 41°05'25", long 90°46'25", near center of
sec.
30, T.13 N.
, R.3
W. ,
Mercer County.
Cedar Creek at Little York,
111.
Lat 41°00'50", long 90°44'45", between sees. 20
and 21,
T.12 N.
, R.3 W. ,
Warren County.
Henderson Creek near Oquawka, 11
1.Lat 41°00'05", long 90°51'15", in NE1/4SW1/4 sec. 28,
T.12 N. ,
R.4 W. ,
Henderson County.
South Henderson Creek
at Biggsville, 11
1.Lat 40°51'25", long 90°51'50", between sees. 16
and 17
, T.10 N.
, R.4
W. ,
Henderson County.
Ellison Creek tributary near Roseville, 11
1.Lat 40°44'00", long 90°45'35", near quarter section
corner between se
es. 29 and 32,
T.9 N.
, R.
3 W. ,
Warren County.
Little Creek near Breckenridge, 11
1.Lat 40°15'00", long 91°19'15", in E1
/S se
c. 16,
T.3 N.
, R.8 W.
, Hancock County.
Bear Creek near Marcelline, 11
1.Lat 40°08'34", long 91°20'14", between se
es. 20
and 21,
T.2 N. ,
R.8 W. ,
Adams County.
Homan Creek tributary near Quincy, 111.
Lat 39°58'45", long 91°22'40", in
SWl/4
sec.
18,
T.I
S.,
R.8 W.
, Adams County.
Q2 4,060
4,800
4,090
2,310
2,620
2,320
2,290
2,540
2,310
1,10
01,
450
1,170
2,290
2,320
2,300
4,840
5,650
4,880
1,77
01,890
1,78
0 54
42 52
395
255
370
8,970
6,640
8,790
251
188
238
Qs 6,370
8,040
6,460
3,680
4,460
3,740
4,100
4,330
4,130
1,440
2,500
1,630
4,540
3,970
4,490
8,200
9,570
8,320
3,220
3,270
3,230 93 78 90 743
466
684
14,7
0011
,000
14,4
00 465
359
441
210
7,910
10,3
008,070
4,670
5,750
4,750
5,690
5,610
5,680
1,620
3,250
1,94
0
6,380
5,150
6,250
10,9
0012
,400
11,100
4,520
4,270
4,480
119
105
117
1,01
0619
916
18,700
14,0
0018,200
619
488
587
225
9,820
13,200
10,1
00
5,940
7,430
6,080
8,170
7,260
8,000
1,820
4,230
2,320
9,080
6,680
8,770
15,0
0016,000
15,100
6,580
5,570
6,380
152
141
150
1,36
0822
1,220
23,700
17,800
23,000
820
662
780
Qso
11,2
0015
,500
11,6
00
6,930
8,690
7,110
10,400
8,530
10,000
1,95
04,970
2,590
11,3
007,850
10,8
00
18,4
0018,800
18,5
00
8,470
6,560
8,050
177
169
175
1,64
0979
1,460
27,400
20,700
26,500
971
798
925
QIOO
12,6
0017
,700
13,0
00
7,940
9,950
8,150
13,0
009,770
12,3
00
2,070
5,710
2,840
13,700
9,020
13,000
22,300
21,600
22,200
10,7
007,570
10,0
00 200
198
200
1,92
01,140
1,71
0
31,000
23,500
30,000
1,12
0940
1,070
Table 1. T-year peak discharges at gaging stations Continued
Map
N
o.
109
1 10
111
1 12
1 13
1 14
115
1 16
117
1 18
1 19
Sta
tion
Sta
tion
na
me
and lo
cati
on
No.
05
50
15
00
B
urt
on
Cre
ek tr
ibu
tary
near
Bu
rto
n,
111.
Lat
39e5
6'0
0",
long
91°1
3f1
5",
in
SW
1/4S
W1/
4 se
c.
33
,T
.1
S.,
R.7
W
., A
dam
s C
ou
nty
.
05
50
20
20
H
adle
y
Cre
ek
near
Barr
y,
111.
Lat
39<>
42 '4
8",
long 91»03'5
6",
in
SW
l/4SW
l/4
sec.
14,
T.4
S
.,
R.6
W
., P
ike
Co
un
ty.
05
50
20
40
H
adle
y
Cre
ek at
Kin
der
ho
ok
, 1
11
.L
at
39
»4
1t3
5l>
, lo
ng
91e08'5
511
, in
S
El/
jNE
l/j
sec.
25,
T.4
S
.,
R.7
W
. ,
Pik
e C
ounty
.
05
50
21
20
R
iser
Cre
ek tr
ibu
tary
n
ear
Barr
y,
11
1.
Lat
39<>
41I0
5I>
, lo
ng
91<
>00
'00
I>,
in
SW
l/jS
El/
j se
c.
29,
T.4
S
. ,
R.5
W
., P
ike
County
.
05
51
25
00
B
ay
Cre
ek at
Pit
tsfi
eld
, 111.
Lat
39<
>37'3
0",
lo
ng
90
°47
'40
I>,
in
NE
1/4S
WV
4 se
c.
18,
T.5
S
.,
R.3
W
., P
ike
County
.
05513000
Bay
C
reek
at
Neb
o,
11
1.
Lat
39026'3
5M
, lo
ng
90e4
5l4
5l>
, in
N
W1/
4NW
1/4
sec.
19,
T.7
S
.,
R.3
W
., P
ike
Co
un
ty.
05
51
32
00
S
alt
S
pri
ng
C
reek
n
ear
Gil
ead,
111.
Lat
39
°07
'00
",
long
90e3
9'5
0l>
, in
SW
1/4
sec. 8
,T
.11
S.,
R
.2
W.,
Cal
houn
County
.
05
51
80
00
K
ankak
ee
Riv
er
at
Sh
elb
y,
Ind
.L
at
41e10'5
8",
lo
ng
87
e20
l33
l>,
in
SW1/
4NE
1/4
sec.
33,
T.3
2
N.
, R
.8
W.,
Lak
e C
ounty
.
05519500
Wes
t C
reek
near
Schneid
er,
In
d.
Lat
41e
12I5
2l>
, lo
ng
87e2
9'3
6l>
, in
N
Wl/
jNE
l/j
sec.
19
,T
.32
N
. ,
R.9
W
., L
ake
County
.
05520000
Sin
gle
ton
Dit
ch at
Illi
no
i,
111.
Lat
41e
11l2
0",
lo
ng
87e3
1'3
5'*
, in
SW
1/4N
W1/
4 se
c. 8
,T
.31
N.
, R
.15
E.
, K
ank
akee
C
ounty
.
05
52
05
00
K
ankak
ee
Riv
er
at
Mom
ence
, 1
11
.L
at
41e09'3
6",
long
87
»4
0t0
711
, in
S
Wl/
jNE
l/4
sec.
24,
T.3
1
N.
, R
. 13
E
.,
Kan
kak
ee
County
.
82
163
115
151
4,5
50
2,9
60
4,3
30
6,4
40
4,0
80
6,2
20
371
252
34
8
4,8
20
2,1
90
4,5
40
6,9
80
5,3
10
6,8
40
27
54
70
303
4,2
40
5,0
40
4,2
60
95
76
28
91
8
1,7
20
2,7
10
1,7
90
6,4
70
7,1
30
6,5
00
as 344
217
304
6,7
10
5,2
60
6,5
00
10
,50
07,1
80
10,1
00
63
847
660
0
8,4
10
3,8
20
7,8
70
11,9
00
9,0
80
11
,70
0
511
904
592
5,1
40
7,5
50
5,2
20
1,3
80
99
31
,32
0
2,1
20
4,3
70
2,2
80
8,5
90
10
,80
08
,67
0
5,0 49
529
34
26
8,0
90
6,9
20
7,9
10
13,1
00
9,4
00
12,7
00
84
36
44
791
10
,90
04,9
80
10
,10
0
15
,30
01
1,7
00
15,0
00
70
61,2
40
82
8
5,6
50
9,1
00
5,7
80
1,6
40
1,2
20
1,5
70
2,3
50
5,4
50
2,5
80
9,8
20
13,0
00
9,9
30
225 71
639
559
6
9,7
10
9,1
40
9,6
20
16
,30
012,3
00
15,8
00
1,1
30
873
1,0
60
14
,10
06,5
00
13
,00
0
19
,60
01
5,1
00
19,1
00
99
81,6
90
1,1
70
6,2
10
10
,90
06,4
10
1,9
40
1,5
00
1,8
70
2,6
00
6,7
90
2,9
40
11,2
00
15
,70
01
1,4
00
Qso 8
97
47
573
3
10,8
00
10,8
00
10,8
00
18,6
00
14
,60
018,1
00
1,3
60
1,0
50
1,2
70
16,4
00
7,6
60
15,1
00
22,8
00
17,7
00
22,2
00
1,2
50
2,0
60
1,4
50
6,5
80
12,2
00
6,8
40
2,1
50
1,7
00
2,0
70
2,7
70
7,7
60
3,1
80
12,2
00
17,6
00
12,4
00
QIOO
1,0
90
55
78
79
11
,90
01
2,6
00
12,1
00
20,7
00
16
,90
020,2
00
1,6
10
1,2
40
1,5
00
18,7
00
8,8
10
17,2
00
25,9
00
20,3
00
25,2
00
1,5
20
2,4
40
1,7
60
6,9
00
13,4
00
7,2
30
2,3
60
1,8
90
2,2
60
2,9
20
8,6
90
3,4
20
13,0
00
19
,40
01
3,3
00
Table 1. T-year peak discharges at gaging stations Continued
Map
No
.
120
121
122
123
124
125
126
127
128
129
130
Sta
tio
n
No.
0552
4500
0552
5000
0552
5050
0552
5500
0552
6000
0552
6150
0552
6500
0552
7050
0552
7500
0552
7800
0552
7840
Sta
tion
nam
e an
d lo
cati
on
Iro
qu
ois
R
iver
n
ear
Fo
resm
an,
Ind.
Lat
4005
2'1
4",
lo
ng 8
7°1
8'2
4",
in
N
El/
jSE
l/j
sec.
15,
T.2
8
N.
, R
.8
W. ,
N
ewto
n C
ou
nty
.
Iro
qu
ois
R
iver
at
Iroquois
, 1
11
.L
at
40°4
9'2
5",
lo
ng 87°3
4'5
5",
in
N
E1/4
SE1/
4 se
c.
15,
T.2
7
N.,
R. 1
1 W
., Ir
oq
uo
is
Co
un
ty.
Eas
tbu
rn
Hol
low
nea
r S
hel
don,
111.
Lat
40°4
6'3
0",
lo
ng
87°3
8'4
0",
in
N
E1/4
NW
1/4
sec. 6
,T
.26
N.,
R.1
1 W
. ,
Iroquois
C
ou
nty
.
Sugar
C
reek
at
Mil
ford
, 111.
Lat
40°3
7'5
0",
lo
ng 87°4
3'2
5",
in
N
Wl/j
NE
l/j se
c.
16,
T.2
5
N.,
R. 1
2 W
. ,
Iro
qu
ois
C
ou
nty
.
Iro
qu
ois
R
iver
n
ear
Cheb
anse
, 111.
Lat
41
°00
'32
",
long
8704
9'2
7",
in
S
El/
jsw
l/4
sec.
10,
T.2
9
N.,
R
.13
W. ,
K
anka
kee
County
.
Kan
kak
ee
Riv
er tr
ibu
tary
near
Bo
urb
on
nai
s,
11
1.
Lat
41
°11
f35",
lo
ng
87°5
7tO
O",
in
SW
l/4
sec. 3
,T
.31
N.
, R
.11
E.,
K
anka
kee
Co
un
ty.
Ter
ry
Cre
ek
nea
r C
ust
er
Par
k,
111.
Lat
41°1
4'0
0",
lo
ng
8
8°0
5'5
5",
near
south
wes
t co
rner
of
SE
l/t
sec.
20,
T.3
2
N.
, R
.10
E.,
W
ill
County
.
Pra
irie
C
reek
n
ear
Fra
nkfo
rt,
111.
Lat
41
°26
'12
",
long
8
7°5
0'4
2",
in
N
W1/
4 se
c.
15
,T
.34
N.
, R
. 12
E.,
W
ill
Co
un
ty.
Kan
kake
e R
iver
n
ear
Wil
min
gto
n,
111.
Lat
41°2
0'4
8",
lo
ng 88°1
1'1
1",
in
N
W1/
4NW
1/4
sec.
15,
T.3
3
N.,
R.9
E
. ,
Wil
l C
ou
nty
.
Des
P
lain
es
Riv
er at
Ru
ssell
, 111.
Lat
42°2
9'2
2",
lo
ng 8
7°5
5I3
2",
in
SE
1/4
sec. 3,
T.4
6
N.
, R
.11
E.,
Lak
e C
ou
nty
.
Des
P
lain
es
Riv
er at
Wad
swo
rth
, 111.
Lat
4
2°2
5'4
5",
lo
ng
87<>
55'4
9",
in
N
Wl/j
NE
l/j se
c.
34
,T
.46
N.
, R
.11
E.,
L
ake
Co
un
ty.
Q2
2,7
70
3,4
40
2,8
10
3,7
20
3,9
60
3,7
30
240
377
258
6,5
50
5,7
40
6,4
90
12,8
00
7,6
00
12,6
00 33 33 33 158
512
179 90 76 87
23
,30
01
7,1
00
23
,10
0
658
796
668
802
818
804
25 3,6
80
5,4
00
3,8
10
5,2
80
6,1
40
5,3
50
521
632
545
11,0
00
9,3
30
10,8
00
18,5
00
11,5
00
18
,10
0 82 60 78
292
869
361
168
134
158
35
,40
02
6,1
00
35
,00
0
1,2
70
1,2
20
1,2
60
1,5
10
1,2
50
1,4
80
Qio
4,2
50
6,6
70
4,4
60
6,3
10
7,5
00
6,4
00
783
805
789
14,3
00
11,7
00
14,0
00
22
,20
014,0
00
21
,70
0
132 79 119
413
1,1
10
521
238
173
215
43,7
00
31,7
00
43,0
00
1,7
20
1,4
90
1,6
90
2,0
10
1,5
10
1,9
30
Q25
4,9
20
8,2
00
5,2
50
7,5
70
9,1
60
7,7
30
1,2
10
1,0
20
1,1
50
18
,70
01
4,8
00
18
,10
0
26
,80
01
6,9
00
26
,00
0
215
103
182
607
1,4
30
764
348
223
299
54
,20
03
8,5
00
53
,10
0
2,3
10
1,7
90
2,2
40
2,6
30
1,8
20
2,4
70
Qso
5,4
00
9,2
90
5,8
10
8,4
90
10
,30
08,6
90
1,6
00
1,1
80
1,4
60
22,1
00
17,0
00
21,3
00
30,1
00
19
,00
029,1
00
294
121
238
785
1,6
50
968
447
261
369
62
,10
043,4
00
60
,70
0
2,7
50
2,0
10
2,6
40
3,0
70
2,0
30
2,8
40
QIOO
5,8
60
10,4
00
6,3
50
9,4
20
11,4
00
9,6
40
2,0
60
1,3
30
1,7
90
25
,70
019,1
00
24,6
00
33,3
00
20,9
00
32,1
00
388
139
303
995
1,8
80
1,2
00
562
297
447
70,0
00
48,0
00
68,1
00
3,2
00
2,2
10
3,0
30
3,4
90
2,2
20
3,1
90
Table 1. T-year peak discharges at gaging stations Continued
co
00
Map
Station
No.
No.
131
*05527870
132
05527900
133
*05527950
134
05528000
135
*05528150
136
*05528170
137
*05528200
138
*05528230
139
05528360
Station name and location
Mill Creek at Wedges Co
rner
, 111.
Lat 42°23'00", long 88°00'15", in
NW
1/4N
W1/4
sec. 18,
T.45 N.,
R.11
E.,
Lake County.
North Mill Creek at Hickory Corners, 11
1.Lat 42°27
158"
/ long 88°00'32", in SW1/4NE1/4 se
c. 13,
T.46 N.
, R.10 E. ,
Lake County.
Mill Creek at Old Mill Cr
eek,
11
1.Lat 42°24'55
>*, long 87°58'08", in SW1/4SE1/4 se
c. 32,
T.46 N.
, R.
11 E.,
Lake County.
Des Plaines River near Gurnee, 111.
Lat 42°20'39", long 87°56'18", in SE1/4SW1/4 se
c. 27,
T.45 N.
, R.11 E.,
Lake County.
Indian Creek at Diamond La
ke,
111.
Lat 42°13
127M
, long 88°00'17
11, in NW
1/4N
W1/4
se
c. 7,
T.43 N.
, R.11 E. ,
Lake County.
Diamond Lake Drain at Mundelein, 111.
Lat 42
° 14' 56", long 87°59'37M
, in SW1/4NE1/4 sec.31,
T.44 N.
, R.
11 E.
, Lake Co
unty
.
Hawthorn Drainage Ditch near Mundelein, 11
1.Lat 42
014'25",
long 87°57'42", in NW
l/^N
Wl/4
se
c. 4,
T.43 N.
, R.
11 E. ,
Lake County.
Indian Creek at Prairie View,
111.
Lat 42°12'34", long 87<>57'18",
in NW
1/4NEl
/4 se
c. 16,
T.43 N.
, R.
11 E.,
Lake County.
Aptakisic Creek at Aptakisic, 111.
Lat 42°10'05", long 87o56'58", in SE1/4SE1/4 se
c. 28,
T.43 N.
, R.11 E.,
Lake County.
Q2 83
208
202
207
486
1,330
1,120
1,32
0
283
54
209
494
110
100
108
25 13
9
306
313
307
812
1,950
1,700
1,930
522
76
318
._
802
192
165
187
210 180
372
381
374
1,02
0
2,340
2,060
2,310
697
_ 90
394
1,02
0
254
208
243
225 23
7
457
460
457
1,26
0
2,820
2,470
2,780
930
108
497
1,290
340
261
318
2s o 28
2
520
515
519
1,42
0
3,160
2,750
3,120
1,110
120
576
1,500
407
299
375
2ioo 329
583
565
578
1,570
3,490
3,020
3,440
1,290
133
_
659
1,710
479
335
434
140
*05528400
Des Plaines River at Wheeling, 111.
1,760
2,640
3,170
3,770
4,180
4,540
Lat 42°08'21", long 87°54'14", in SW1/4SW1/4 sec.1,
T.42 N. ,
R.
11 E.
, Cook County.
141
*05528440
Buffalo Creek near Lake Zu
rich
, 111.
81
130
166
213
250
287
Lat 42°10'58", long 88°03'02", in NW1/4NE1/4 sec.27,
T.43 N. ,
R.10 E.,
Lake County.
Table 1. T-year peak discharges at gaging stations Continued
Map
Station
No.
No.
Station na
me and location
QIO
Q25
QIOO
142
*05528470
Bu
ffalo
C
reek
at
Long G
rove,
1
11
.L
at
42°1
0I3
8",
lo
ng
87»59
I57
M,
in
SE1/
4NW
1/4
sec.3
0,
T.4
3
N.,
R.1
1 E
.,
Lak
e C
ou
nty
.
22
936
7457
566
643
717
143
*05528500
Bu
ffalo
C
reek
n
ear
Wh
eeli
ng
, 1
11
.L
at
42°0
9'1
5",
lo
ng
87
»5
7'2
5",
in
N
El/
jNW
l/4
sec.4
, T
.42
N.,
R.1
1 E
.,
Coo
k C
ounty
.
36
45
69
69
28
32
92
41,0
10
144
05529000
Des
P
lain
es
Riv
er
near
Des
P
lain
es,
111.
2,1
80
3,1
60
3,7
60
4
,45
0
4,9
10
5,3
50
Lat
42°0
4I5
5",
lo
ng
87«53
I25",
in
S
El/
jSE
l/j
sec.2
5,
1,4
90
2,2
40
2,7
00
3,2
40
3,6
10
3,9
40
T.4
2
N.,
R.1
1 E
.,
Coo
k C
ou
nty
. 2,1
40
3,1
00
3,6
90
4,3
50
4,8
00
5,2
20
145
*05529300
McD
on
ald
C
reek
n
ear
Wh
eeli
ng
, 111.
186
334
44
2
58
5
69
5
80
6L
at
42°0
7'1
4",
lo
ng
87°5
6I4
7M
, in
N
W1/
4NW
1/4
sec.1
5,
T.4
2
N.
, R
.11
E.
, C
ook
Co
un
ty.
U)
VO
146
*0
55
29
50
0
McD
on
ald
C
reek
n
ear
Mou
nt P
rosp
ect,
1
11
.L
at
42°0
5'4
3",
lo
ng
8705
4'4
6",
in
SW1/
4SE
1/4
sec.
23
, T
.42
N
.,
R.1
1 E
.,
Coo
k C
ounty
.
193
36
84
97
66
9800
93
0
147
*05529900
We H
er
Cre
ek at
Mou
nt P
rosp
ect,
111.
Lat
42
°03
'32
M,
long
87°5
712
3",
in
N
E1/
4sw
1/4
sec.1
1,
T.4
1
N.,
R.1
1
E.,
C
ook
County
.
48
2778
991
1,2
70
1,4
90
1
,72
0
148
*05530000
Well
er
Cre
ek at
Des
P
lain
es,
111.
Lat
42°0
2t5
8",
lo
ng 87«55'0
5",
in
N
Wl/4
NW
l/4 se
c.
18,
T.4
1
N.,
R.1
2
E.,
C
ook
Co
un
ty.
677
1,030
1,26
01,
530
1,72
0 1,
900
149
*05530400
Higgins Creek near Mount Prospect, 111.
Lat 42°02
I04"
, long 87°57'35", in
NW1/4NWV4
sec.23,
T.41 N.,
R.11
E.
, Cook County.
137
247
330
445
536
631
150
*05530480
Willow Creek at Orchard Pl
ace,
11
1.Lat 41°59'49", long 87°52
I47",
in SE1/4SW1/4 se
c. 33,
T.41 N.,
R.12
E.,
Cook
County.
586
1,070
1,430
1,92
0 2,310
2,710
151
*05530600
Des
P
lain
es
Riv
er
at
Riv
er
Gro
ve,
1
11
.L
at
41°5
5'4
6",
lo
ng 87°5
0'4
0",
in
N
W1/4
sw1/
4 sec.2
6,
T.4
0
N.,
R.1
2 E
.,
Coo
k C
ounty
.
2,5
80
3,3
80
3,8
30
4,3
10
4,6
20
4,8
90
152
*05530700
Sil
ver
Cre
ek at
Mel
rose
P
ark
, 111.
Lat
41°5
4'1
8",
lo
ng 87°5
0'4
0",
in
N
W1/
4NW
1/4
sec.2
, T
.39
N
.,
R.1
2
E.,
C
ook
County
.
44
6557
62
26
96
74
67
93
Table
1. T-year peak discharges at
gaging stations Continued
Map
N
o.S
tati
on
N
o.S
tati
on
na
me
and
locati
on
Q2Q
25
153
*055
3080
0 D
es
Pla
ines
Riv
er at
Fore
st
Par
k,
111.
2,7
70
3,6
80
4,1
80
4,7
10
5,0
50
5,3
50
Lat
41*52'0
5",
lo
ng
87»49'3
9",
in
S
El/
jSE
l/j
sec.
14,
T.39 N.,
R. 12
E.,
Cook
Co
unty
.
154
*055
3094
0 Sa
lt Cr
eek
at Pala
tine
, 111.
201
288
351
436
503
573
Lat
42*06'38", long 88*03
f47"
, in SWl/4S
Wl/4 sec. 15,
T.42 N.
, R.
10 E.,
Cook
Co
unty
.
155
*055
3096
0 Sa
lt Cr
eek
near
Palatine,
111.
Lat 42
*04'
26",
lo
ng 88*02'38", in
NW1/4SW1/4 se
c.35
, T.42 N.,
R.10 E.,
Cook
Co
unty
.
156
*055
3099
0 Sa
lt Cr
eek
at Ro
llin
g Meadows, 111.
Lat
42°03'37", lo
ng 88*00'59", in SWV4NW1/4
sec.
8,
T.41 N.
, R.
11 E.
, Cook Co
unty
.
300
650
466
816
583
915
735
1,030
851
1,11
0
969
1,180
157
*055
3100
0 Salt Creek
near
Arlington
Heights, 111.
453
700
864
1,070
1,22
0 1,
360
Lat 42°03'02", lo
ng 88°00'31", in NE1/4NW1/4 sec. 17,
__
__
T.41 N.,
R.11 E. ,
Cook Co
unty
.
158
*055
3105
0 S
alt
C
reek
n
ear
Woo
d D
ale,
1
11
. 65
9 99
7 1,2
40
1,5
60
1,8
10
2,0
70
Lat
41»59'3
4",
lo
ng
8
7°5
9'4
4M
, in
N
W1/
4NW
1/4
sec.4
,
T.4
0
N.,
R
.11
E.,
D
u P
age
Co
un
ty.
159
*055
3108
0 S
pri
ng
Bro
ok
at
Blo
om
ing
dal
e,
11
1.
177
262
324
409
477
549
Lat
41»57'3
1",
lo
ng 88°0
4'1
4",
in
N
W1/
4NW
1/4
sec.
14
,
T.4
0
N.,
R
.10
E.,
Du
Pag
e C
ounty
.
160
*055
3110
0 M
each
am C
reek
at
Med
inah
, 11
1.
61
96
122
161
192
227
Lat
41
*58
t39
",
lon
g 88°0
2'5
2",
in
SW
1/4
sec.
1,
T.4
0
N.
, R
.10
E.,
Du
Pag
e C
ou
nty
.
161
*055
3113
0 S
pri
ng
Bro
ok at
Wal
nu
t A
venu
e at
Itasc
a,
111.
245
359
439
545
627
711
Lat
41°5
8'1
6",
lo
ng
8
8*
00
'47
",
in
SE1/
4NW
1/4
sec.8
,
T.4
0
N.,
R
.11
E.,
Du
Pag
e C
ounty
.
162
*055
3120
0 S
alt
C
reek
at
Ad
dis
on,
111.
83
8 1,1
30
1,3
30
1,5
70
1,7
60
1,9
50
Lat
41
*5
5'4
4",
lo
ng
87°5
8I4
0",
in
SW
1/4N
W1/
4 se
c.2
7,
T.4
0
N.,
R.1
1 E
.,
Du
Pag
e C
ounty
.
163
*055
3130
0 S
alt
C
reek
at
Elm
hurs
t,
111.
96
1 1,2
70
1,4
80
1,7
40
1,9
40
2,1
40
Lat
41°5
3'2
0",
lo
ng 87°5
7'4
1",
in
N
E1/
JNE
1/4
sec.
10
,
T.3
9
N.
, R
.11
E.,
Du
Pag
e C
ou
nty
.
Table 1. T-year peak discharges at gaging stations Continued
Map
Station
No.
No.
Station name and location
Q2Qio
Q25
Qioo
164
*055
3138
0 S
alt
C
reek
at
Oak
B
roo
k,
111.
1,0
30
1
,34
0
1,5
10
Lat
41«5
1I3
9",
lo
ng
87e5
6'5
2",
in
SW
l/4SE
l/4
sec.2
3,
T.3
9
N.,
R
.11
E.,
Du
Pag
e C
ou
nty
.
165
*055
3150
0 S
alt
C
reek
at
Wes
tern
S
pri
ngs,
111.
1,1
60
1,5
30
1,7
40
Lat
41°4
9'3
5",
lo
ng 87°5
4'0
0",
in
N
E1/
4SE
1/4
sec.3
1,
T.3
9
N.,
R.
12 E
.,
Coo
k C
ounty
.
1,7
10
1,8
50
1,9
70
1,9
80
2,1
50
2,3
00
166
*055
3180
0 A
ddis
on
Cre
ek at
No
rth
lak
e,
111.
Lat
41°5
4'3
7",
lo
ng
87°5
4'1
0",
in
SW
l/4sw
1/4
sec.3
2,
T.4
0
N.,
R.1
2 E
.,
Coo
k C
ou
nty
.
312
376
410
44
64
70
49
0
167
*055
3200
0 A
ddis
on
Cre
ek at
Bel
lwo
od
, 111.
454
605
690
Lat
41°5
2'4
8",
lo
ng
87°5
2'0
7",
in
SW
1/4S
E1/4
se
c.9
,
T.3
9
N.,
R.1
2 E
.,
Coo
k C
ou
nty
.
168
*05532500
Des Plaines River at Riverside, 11
1.
3,860
5,170
5,940
Lat 41«49'20", long 87«49
I15",
in SWl/4SWl/4
sec.36,
T.39 N.,
R.12 E.
, Co
ok County.
784
846
902
6,7
90
7,3
70
7,9
00
169
*05533000
Flag Creek near Willow Springs, 11
1.L
at
41°4
4'2
0",
lo
ng 8
7°5
3'4
8",
in
SE
1/4N
E1/
4 se
c.3
1,
T.3
8
N.,
R
.12
E.,
Coo
k C
ou
nty
.
752
1,250
1,63
02,150
2,560
3,000
170
*05533200
Sawmill Creek tributary near Tiedtville, 111.
Lat 41
e44'05", long 87°58'00", in NE1/4SW1/4 sec.34,
T.38 N.,
R.11 E.
, Du
Page County.
232
280
305
332
349
365
171
*05533300
Wards Creek near Woodridge, 111.
80
114
134
Lat 41°43'32", long 87»59'19", in SW
1/4N
W1/4
sec.4,
T.37 N.,
R.11 E.,
Du Page County.
172
*05533400
Sawmill Creek near Lemont, 111.
576
909
1,11
0Lat 41«42
I28",
long 87°57
t45",
in NE1/4SW1/4 sec.10,
T.37 N.
, R.11 E.
, Du
Page County.
173
*05533500
Des Plaines River at Lemont, 111.
3,120
4,190
4,800
Lat 41°40'54", long 88°00'09", in SE1/4NW1/4 sec.20,
T.37 N.
, R.11 E.
, Cook County.
157
173
188
1,3
40
1,5
00
1,6
30
5,4
80
5,9
20
6,3
20
174
*05534300
North Branch Chicago River at Lake Forest, 111.
Lat 42
° 14
'24"
, long 87»52'50", in NE
1/4N
W1/4
sec.6,
T.43 N.
, R.12 E.,
Lake County.
192
262
303
349
380
409
Table 1. T-year peak discharges at gaging stations Continued
Map
St at ion
No
. No
. Station name and location
Q2
Q5
Q1Q
Q25
Q5Q
Q1Q
O
175
*05534400
North Branch Chicago River at
Bannockburn, 11
1.
247
320
360
404
432
456
Lat 42°12
I00",
long 87°51'10", in
SW
1/4S
E1/4
sec. 17,
T.43 N.
, R.12 E.,
Lake County.
176
*05534500
North Branch Chicago River at
Deerfield, 111.
298
437
526
633
709
783
Lat 42°09'10", long 87°49'07M
, in SWl/4SE
l/4
sec.34,
T.42 N.
, R.12 E.,
Lake County.
177
*05534600
North Branch Chicago River at Northfield, 111.
346
434
482
536
571
603
Lat 42°06'05", long 87°46'26", in NE1/4SE1/4 sec.24,
T.42 N.,
R.12 E. ,
Cook County.
178
*05534900
Skokie River at Lake Bluff, 11
1.
205
314
385
471
532
591
Lat 42°16'46", long 87«51'46", in NW1/4 sec.20,
T.44 N.
, R.12 E.
, Lake County.
179
*055
3500
0 S
kokie
R
iver
at
Lak
e F
ore
st,
111.
214
301
352
410
448
483
^
Lat
42
°13
'57
",
long 8
7°5
0'4
1",
in
N
WV
4SW
1/4
sec.4
,
to
T.4
3
N.,
R
.12
E.,
Lak
e C
ou
nty
.
180
*055
3507
0 S
ko
kie
R
iver
n
ear
Hig
hla
nd
Par
k,
11
1.
421
531
600
684
744
803
Lat
42
°09
'34
",
long 87°4
7'5
2",
in
NW
V4S
E1/4
se
c.3
5,
T.4
3
N.,
R.1
2 E
.,
Lak
e C
ounty
. _
__
__
_
181
*055
3515
0 S
ko
kie
R
iver
at
Nort
hfi
eld
, 111.
377
448
489
536
567
597
Lat
42°0
6'0
5",
lo
ng 8
7°4
5'3
3",
in
N
W1/
4SE1
/4
sec.
19,
T.4
2
N.,
R
.13
E.
, C
ook
County
.
182
*055
3520
0 N
ort
h
Bra
nch
C
hic
ago
R
iver
at
Gle
nv
iew
, 111.
691
872
983
1,1
20
1
,21
0
1,3
10
Lat
42°0
4'0
8",
lo
ng
87°4
6'2
8",
in
S
El/
jSE
l/fc
se
c.3
6,
T.4
2
N.,
R.1
2 E
.,
Coo
k C
ounty
.
183
*05535300
West Fork of North Branch Chicago River at
Bannockburn, 111.
209
285
332
388
427
464
Lat 42°12'00", long 87°53'24", in NE
1/4S
E1/4
sec.13,
T.43 N.
, R.
11
E.,
Lake County.
184
*05535400
West Fork of North Branch Chicago River at
Deerfield, 111.
364
453
504
562
601
638
Lat 42°10'02", long 87°51'24", in NW1/4NE1/4 sec.32,
T.43 N. ,
R.12 E.,
Lake County.
Table
1. T-year pe
ak discharges at
ga
ging
stations--Continued
Map
No.
Stat
ion
No.
Stat
ion
name
an
d location
Q25
Qso
u>
185
*05535500
West Fo
rk of North
Branch Ch
icag
o Ri
ver
atNo
rthb
rook
, 111.
47
4 67
9 801
Lat 42
°08'
18"
/ lo
ng 87
-50"
04",
in SWl/4S
El/4 se
c.4,
T.42 N.
, R.
12 E.
, Co
ok Co
unty
.
186
*0
55
35
70
0
Wes
t F
ork
of
Nort
h
Bra
nch
C
hic
ago
R
iver
at
Gle
nv
iew
, 111.
63
3
84
6
97
4L
at
42°0
5I1
3",
lo
ng
87
°48
I08",
in
N
E1/
4SW
1/4
sec.2
6,
T.4
2 N
.,
R.1
2 E
.,
Coo
k C
ou
nty
.
187
*0
55
35
80
0
Nort
h
Bra
nch
C
hic
ago
Riv
er
at
Mo
rto
n
Gro
ve,
111.
1,0
30
1
,34
0
1,5
30
Lat
42
°03
'00
",
long 8
7»
46
'50
",
in
SE1/
4NW
1/4
sec.
17,
T.4
1
N.,
R. 1
3 E
.,
Coo
k C
ounty
.
188
*0
55
36
00
0
No
rth
B
ranch
C
hic
ago
R
iver
at
Nil
es,
111.
1,1
20
1,4
40
1,6
30
Lat
42°0
0'4
4",
lo
ng
87
«4
7>4
5",
in
S
Wl/
jSE
l/4
sec.3
0,
T.4
1
N.,
R.
13 E
.,
Coo
k C
ounty
.
189
05536178
Plu
m C
reek
near
Dy
er,
Ind.
Lat
41°2
8'1
2",
lo
ng 87°3
1'5
7",
in
SE1/
4SW
1/4
sec.3
2,
T.3
5 N
.,
R.1
5 E
.,
Coo
k C
ounty
.
190
05536190
Hart
D
itch at
Nunst
er,
In
d.
Lat
41°3
3I4
0",
lo
ng
87°2
8I5
0",
in
SE
1/4N
W1/
4 sec.2
0,
T.3
6 N
.,
R.9
W
.,
Lak
e C
ounty
.
191
*0
55
36
20
1
Thorn
C
reek
at
Park
F
ore
st,
1
11
. 3
17
59
3 8
26
Lat
41°2
8I1
9",
lo
ng 87»40'2
6",
in
SW
1/4SW
l/4 sec.3
1,
T.3
5
N.
, R
.14 E
.,
Coo
k C
ounty
.
192
*055
3620
7 Thorn
Cree
k tributary
at Ch
icag
o Heights, 11
1.
253
410
534
Lat 41°30
I22"
, lo
ng 87
»39'
36",
in SWl/jNEl/j sec. 19,
T.35 N. ,
R.14 E. ,
Co
ok Co
unty
.
193
*05536210
Thorn
Creek
near
Ch
icag
o Heights, 11
1.
993
1,43
0 1,
730
Lat 41
-30'
50",
lo
ng 87
«38'
07",
in SE1/4SE1/4 sec. 17,
T.35 N.,
R.14
E.
, Co
ok Co
unty
.
194
*05536215
Thorn
Creek
at Glenwood,
111.
1,080
1,590
1,950
Lat 41
°31'
50",
lo
ng 87
«36
I20"
, in
SW1/4SE1/4 se
c.9,
T.35 N.
, R.14 E.
, Co
ok Co
unty
.
195
*0
55
36
23
5
Dee
r C
reek
near
Ch
icag
o H
eig
hts
, 1
11
. 5
28
71
7 84
1L
at
41°3
1I15",
lo
ng 87»35'2
5",
in
SE
1/4N
WV
4 sec.1
4,
T.3
5 N
.,
R.1
4
E.,
Coo
k C
ounty
.
93
9
1,0
30
1
,12
0
1,1
20
1,7
70
1,8
60
1,1
80
71
5
1,2
20
1,9
50
2,0
20
1,4
80
86
8
1,3
20
2,1
10
2,1
70
1,1
70
690
1,0
70
1,3
30
1,3
50
1,3
30
1,7
20
1
,12
0
1,5
90
1,8
70
2,2
10
1,8
90
2,0
50
1,4
10
1,8
90
2,2
10
2,7
90
2,2
60
2,4
30
1,7
70
2
,24
0
2,6
20
3,5
10
2,7
20
2,6
90
2,0
20
2,4
90
2,9
20
4,0
40
3,0
40
2,9
20
2,2
70
2,7
20
3,2
10
4,5
40
3,3
60
1,8
30
1,0
40
2,1
00
2,3
80
2
,66
0
2,4
40
2,8
20
3
,21
0
99
8
1,1
20
1,2
30
Table 1. T-year peak discharges at
gaging stations Continued
Map
No.
Station
No.
Station name and location
252io
225
250
2ioo
196
*05536238
Butterfield Creek near Lincoln Estates, 111.
Lat 41°30'22", long 87°46'34", in NEl/^SEl/4 se
c.19
, T.35 N.,
R.13 E.,
Cook County.
142
265
361
494
600
711
197
*05536255
198
*05536265
199
*05536270
200
*05536275
201
*055
36
29
0
Butterfield Creek at
Flossmoor, 111.
Lat 41°32
I25",
long 87°38'55", in NE
1/4N
W1/4
sec. 8,
T.35 N.
, R.14 E.,
Cook County.
Lansing Ditch near Lansing, 111.
Lat 41°31'40", long 87°31'45", at
north boundary
of se
c. 17, T.35 N.
, R.15 E.
, Cook Co
unty
.
North Creek near Lansing, 11
1.Lat 41°32
I45"
, long 87o33'30", in SE1/4SE1/4 se
c.1,
T.35 N.
, R.14 E.,
Cook County.
654
1,120
1,480
2,000
2,430
2,900
Thorn Creek at
Thornton, 111.
Lat 41
034
'05"
, long 87
036
'30"
, in
T.36 N.
, R.14 E.,
Cook County.
sec.
34,
Lit
tle
Cal
um
et
Riv
er
at
So
uth
H
oll
and,
111.
Lat
41
°36
'25
",
long 87°3
5'5
2",
in
N
E1/
4SE
1/4
sec.
15,
T.3
6
N.,
R
.14
E.,
C
ook
Co
un
ty.
197
356
295
513
355
612
2,0
50
2,9
70
3,5
70
2,5
20
3,3
60
3,8
60
42
5
73
2
47
3
817
51
7
89
9
4,3
10
4
,85
0
5,3
80
4,4
30
4,8
20
5,1
80
202
*05536310
Cal
um
et
Un
ion
D
rain
age
Can
al
near
Mar
kham
, 111.
Lat
4103
5'4
8",
long
87<
>39
'59
M,
in
SE1/
4NW
1/4
sec.1
9,
T.3
6
N.,
R
.14
E
.,
Coo
k C
ounty
.
20
3
*0
55
36
32
5
Lit
tle
Cal
um
et
Riv
er
at
Har
vey
, 111.
Lat
41°3
713
5",
lo
ng
87
<>
38
'05
",
in
SE1/
4NW
1/4
sec.9
, T
.36
N
.,
R.1
4
E.,
Coo
k C
ounty
.
204
*05536335
Mid
loth
ian
Cre
ek
near
Tin
ley
Park
, 1
11
.L
at
41°3
5'1
8",
lo
ng
87«44'5
2",
in
N
E1/4
NW
1/4
sec.2
8,
T.3
6
N.,
R
.13
E.,
Coo
k C
ou
nty
.
20
5
*05
53
63
40
M
idlo
thia
n
Cre
ek at
Oak
F
ore
st,
111.
Lat
41036'5
1",
long
87°4
314
6",
in
SE
1/4N
W1/
4 se
c.
15
, T
.36
N
.,
R.1
3
E.,
Coo
k C
ounty
.
206
*05
53
64
60
T
inle
y
Cre
ek
near
Oak
F
ore
st,
111.
Lat
41037'4
9",
long 8
7°4
7'0
5",
in
N
W1/
4NE1
/4 sec.7
, T
.36
N
.,
R.1
3
E.,
Coo
k C
ounty
.
305
397
449
507
546
581
1,9
90
2,9
70
3,5
90
221
24
9
42
0
29
4
347
63
5
34
4
41
5
782
4,3
30
4,8
60
5,3
50
410
50
7
460
57
8
512
65
2
969
1,1
10
1,2
50
Table 1. T-year peak discharges at gaging stations Continued
Map
N
o.S
tati
on
N
o.S
tati
on
nam
e an
d lo
cati
on
Q2Q2
5Qs
odoo
207
*05536500
Tinley Creek near Palos Park,
111.
547
923
1,210
1,60
0 1,
910
2,240
Lat 41°38'48", long 87°45'59", in SW1/4SE1/4 se
c. 32,
T.37 N.,
R.13 E.,
Cook County.
208
*055
3651
0 N
avaj
o
Cre
ek at
Pal
os
Heig
hts
, 11
1.
235
313
364
427
474
520
Lat
41°3
9'3
9",
lo
ng
87°4
7'3
8",
in
SW
l/4SW
l/4 se
c.
30
,
T.3
7
N.
, R
.13
E-,
C
ook
County
.
Ul
209
*05536560
210
*05536570
211
*05536620
212
*05536630
213
05537500
214
*05538000
Melvina Ditch near Oak Lawn,
111.
Lat 41°43'09", long 87°47'07", in
T.37 N.
, R.13 E.,
Cook County.
Stony Creek (W
est) at Worth, 111.
Lat 41°42'00", long 87°47'52", in
T.37 N.
, R.12 E.,
Cook County.
sec. 7
sec. 13,
Mil
l C
reek
n
ear
Pal
os
Park
, 111.
Lat
4
1°3
9'0
9",
lo
ng
87°5
012
3",
in
N
W1/
4SE1
/4 se
c.
34
, T
.37
N.
, R
.12
E.,
C
ook
County
.
Mil
l C
reek
at
Pal
os
Park
, 111.
Lat
41
°40
'27
",
long 87°5
0'3
5",
in
SW
l/fcS
El/a
se
c. 2
2,
T.3
7
N.
, R
.12
E.
, C
ook
County
.
Long Run near Lemont, 11
1.L
at
41e3
8'3
3",
lo
ng
8705
9'5
7",
in
S
Wl/
jSE
l/j
sec. 3
2,
T.3
7
N.
, R
.11
E.
, C
ook
Co
un
ty.
Des
P
lain
es
Riv
er at
Jo
liet,
111.
Lat
41e3
r54
",
long
88°0
5'0
5",
in
SE
1/4N
E1/
4 se
c. 9
, T
.35
N.
, R
.10
E.,
Wil
l C
ou
nty
.
140
41
5
121
209
58
55
30
581
15,4
00
234
710
185
44
5
1,0
60
873
1,0
40
18,1
00
301
92
3
227
669
1,4
60
1,1
00
1,4
00
19,6
00
387
1,2
00
279
1,0
40
2,0
30
1,3
90
1,9
10
21,3
00
453
1,4
20
317
1,4
00
2,5
20
1,5
90
2,3
30
22
,40
0
519
1,6
30
354
1,8
30
3,0
70
1,7
90
2,7
90
23
,40
0
215
*05538440
Spring Creek near Orland Park,
111.
41
60
73
89
100
112
Lat 41
e36'02", long 87°54'02", in
NW
1/4N
E1/4
sec.19,
T.36 N.
, R.12 E.,
Cook County.
216
*055
3900
0 H
ickory
C
reek
at
Jo
liet,
111.
2,8
30
5
,06
0
7,0
00
10
,10
0
12,9
00
16,1
00
Lat
41°3
1'1
0",
lo
ng
88°0
4'1
0",
in
SE
1/4N
E1/
4 se
c.1
5,
T.3
5
N.
, R
.10
E.
, W
ill
County
.
217
*05539870
West Branch Du Page River at Ontarioville, 11
1.
313
498
616
756
853
944
Lat 41
e58'42", long 88°07'59", in
NW1/4SE1/1 sec.6,
T.40 N.
, R.
10 E. ,
Du Page County.
Table 1. T-year peak discharges at gaging stations Continued
Map
Station
No.
No.
Station name and location
Q2
225
Qso
QIOO
21
8
*0
55
39
89
0
Wes
t B
ranch
D
u P
age
Riv
er
near
Way
ne,
111.
48
8
78
8
1,0
10
1,3
00
1,5
40
1,7
80
Lat
41
°56
'37
",
long
88
01
0'5
1",
in
NW
1/4N
W1/
4 sec.2
3,
T.4
0
N.
, R
.9
E.,
D
u P
age
County
.
219
*05539900
Wes
t B
ranch
D
u P
age
Riv
er
near
Wes
t C
hic
ago,
111.
46
2
66
0
780
91
9
1,0
10
1,1
00
Lat
41°5
4'3
9",
lo
ng 8
8°1
0'4
4",
in
SE
1/4N
W1/
4 sec.3
5,
T.4
0
N.
, R
.9 E
.,
Du
Pag
e C
ounty
.
220
*0
55
39
95
0
Kle
in
Cre
ek at
Caro
l S
tream
, 111.
187
30
3
39
5
529
64
2
76
8L
at
41°5
4'2
4",
lo
ng 88°0
8'3
2",
in
N
E1/
4SW
1/4
sec.3
1,
T.4
0
N.
, R
. 10
E
.,
Du
Pag
e C
ounty
.
221
*05540030
Wes
t B
ranch
D
u P
age
Riv
er
at
Wes
t C
hic
ago,
11
1.
731
1,0
30
1,2
20
1,4
50
1,6
10
1,7
60
Lat
41°5
1'4
1",
lo
ng 8
8°1
1'3
3",
in
N
W1/
4SE
1/4
sec.
15,
T.3
9
N.
, R
.9 E
.,
Du
Pag
e C
ounty
.
22
2
*0
55
40
06
0
Kre
ss
Cre
ek at
Wes
t C
hic
ago,
111.
264
37
5
45
0
545
61
6
68
7L
at
41°5
1'2
3",
lo
ng 8
8°1
2'1
5",
in
N
W1/
4NW
1/4
sec.2
2,
T.3
9
N.
, R
.9
E.,
D
u P
age
County
.
22
3
*0
55
40
08
0
Spri
ng
Bro
ok
at
Whea
ton,
111.
152
220
27
0
33
8
392
44
9L
at
41 °
51*02",
lo
ng 88°0
6'5
3",
in
N
E1/
4SE
1/4
sec.2
0,
T.3
9
N.
, R
.10
E
.,
Du
Pag
e C
ounty
.
22
4
*0
55
40
09
5
Wes
t B
ranch
D
u P
age
Riv
er
near
Warr
envil
le,
11
1L
at
41°4
9'2
2",
lo
ng 8
8°1
0'2
3",
in
SW
1/4N
E1/4
sec.3
5,
T.3
9
N.,
R.9
E
.,
Du
Pag
e C
ounty
.
22
5
05
54
01
10
F
err
y
Cre
ek at
Warr
envil
le,
111.
Lat
41°4
9I1
3",
lo
ng 88°1
1'3
5",
in
SW
1/4N
E1/
4 se
c.3
4
T.3
9
N.,
R
.9 E
.,
Du
Pag
e C
ounty
.
22
6
05
54
01
40
E
ast
B
ranch
D
u P
age
Riv
er
near
Blo
om
ing
dale
, 1
11
L
at
41
»5
6'0
6",
lo
ng 8
8«
03
'29
",
in
SW1/
4SE
1/4
sec.2
3
T.4
0
N.,
R.1
0
E.,
D
u P
age
County
.
22
7
*05
54
01
50
E
ast
B
ranch
D
u P
age
Riv
er
at
Gle
n E
llyn,
11
1.
Lat
41«53'2
4",
lo
ng 88°0
3'0
1",
in
SW1/
4SW
1/4
sec.
1,
T.3
9
N.,
R.1
0
E.,
D
u P
age
Co
un
ty.
228
*0
55
40
16
0
East
B
ranch
D
u P
age
Riv
er
near
Dow
ner
s G
rove,
1
11
. L
at
41»49'5
4",
lo
ng 88°0
2'5
1",
in
S
E1/
4SW
l/4 sec.2
5,
T.3
9
N.,
R.1
0
E.,
D
u P
age
County
.
[11.
ec.35,
ec.34,
111.
ec.2
3,
1,140
___ 869888 59 95
63
1,570
128
165
134
102
166
111
1,830
___
158
209
168
133
213
146
2,150
197
264
212
175
273
192
2,370
228
302
245
206
317
227
2,590
259
340
279
238
359
261
24
2
59
7
39
8508
961
1,2
20
649
1,5
70
75
5
1,8
50
861
2,1
30
Table 1. T-year peak discharges at gaging stations Continued
Map
Station
No.
No.
Station name and location
229
*05540190
St.
Joseph Creek at Belmont, 111.
344
517
628
761
855
945
Lat 41°47'31", long 88°02'15", in NW1/4SE1/4 se
c. 12,
T.38 N.,
R.10 E. ,
Du Page County.
230
*05540240
Prentiss Creek near Li
sle,
111.
191
303
388
509
609
716
Lat 41°46'17", long 88°04'11", in SW1/4SW1/4 se
c. 14,
T.38 N.,
R.10 E.
, Du
Page County.
231
*05540500
Du Page River at
Shorewood, 111.
3,670
5,790
7,290
9,280
10,8
00
12,4
00Lat 41°31'20", long 88° 11
'35"
, in SE
1/4S
W1/4
se
c. 10,
T.35 N.
, R.9 E.,
Will County.
232
05541750
Mazon River tributary near Gardner, 111.
Lat 41009*36", long 88°20'35", in SE
1/4
sec. 18,
T.31 N.
, R.8 E-,
Grundy County.
233
05542000
Mazon River near Coal City, 111.
Lat 41° 17'10",
long 88°21'35", in SW1/4SW1/4 sec.31,
T.33 N.,
R.8 E.,
Grundy County.
234
*05543500
Illinois River at Marseilles, 11
1.Lat 41°19'40", long 88°43
110",
in SE
1/4S
W1/4
se
c. 13,
T.33 N.
, R.4
E.,
La Salle County.
235
05546500
Fox River at Wilmot, Wis.
Lat 42°30*40", long 88°10'45", in
SW
l/4
sec.30,
T.1 N.
, R.20 E.
, Kenosha County.
236
05548150
North Branch Nippersink Creek tributary near
near Genoa City,
Wis.
Lat 42°30'15", long 88°23'01", in E1/2 sec.32,
T.1 N.
, R.18 E.,
Walworth County.
237
*05548280
Nippersink Creek near Spring Grove, 111.
Lat 42°26'37", long 88°14'51", in NE
l/4N
Wl/4 sec.25,
T.46 N.
, R.8
E.,
McHenry County.
238
*05549000
Boone Creek near McHenry, 11
1.Lat 42
° 19
'15"
, long 88° 18
'45"
, in NW1/4SW1/4 sec.4,
T.44 N.
, R.8
E.,
McHenry County.
239
05549700
Mutton Creek at Island Lake,
111.
Lat 42°17'05", long 88° 10*47",
in NE
1/4N
E1/4
se
c. 21,
T.44 N.
, R.9 E.
, Lake County.
107
176
114
8,630
5,520
8,410
43,600
2,620
1,630
2,580
175
237
182
1,27
0
130 79
134
84
145
295
158
13,800
8,930
13,500
61,400
3,880
2,450
3,780
238
396
258
1,920
201
159
219
169
166
374
186
17,000
11,200
16,600
72,600
4,750
2,940
4,590
277
502
308
2,320
246
229
274
238
188
472
218
20,600
14,1
00
20,000
86,000
5,890
3,510
5,620
321
632
368
2,770
300
335
339
336
202
542
240
23,000
16,1
00
22,300
95,500
6,760
3,890
6,410
352
724
410
3,070
337
428
385
416
215
612
260
25,100
18,2
00
24,400
105,000
7,660
4,240
7,190
380
815
450
3,340
372
531
428
501
Tab
le 1.
T-y
ear
pea
k d
isch
arg
es
at
gag
ing st
ati
on
s C
on
tin
ued
00
Map
No.
240
241
242
243
244
245
246
247
248
249
250
Station
No.
*05549850
05549900
*05550000
05550300
*05550430
05550450
*0 5550470
*05550500
05551030
05551050
05551060
Stat
ion
name
and
loca
tion
Flin
t Cr
eek
near Fo
x Ri
ver
Grove, 11
1.Lat 42°12'40", lo
ng 88°10'23", in
NW1/4
sec.
15,
T.43 N.
, R.9
E.,
Lake
Co
unty
.
Fox
Rive
r tributary
near
Gary,
111.
Lat 42
° 11
'48
", long 88°15'54", in NW1/4NE1/4 se
c. 23,
T.43 N.
, R.8 E.
, McHenry County.
Fox River at Algonquin, 111.
Lat 42°09'59", long 88°17'25", in NE1/4NW1/4 sec. 34,
T.43 N.
, R.8 E.
, McHenry County.
Tyler Creek at Elgin, 111.
Lat 42°03'31", long 88°18'14", in SE1/4SE1/4 se
c. 3,
T.41 N.
, R.8
E.,
Kane County.
East Branch Poplar Creek near Palatine, 11
1.Lat 42»04'02", long 88°06'41", in SW
1/4S
E1/4
sec.31,
T.42 N.
, R.10 E.
, Cook County.
Poplar Creek near Ontarioville, 11
1.Lat 42°02'48", long 88°09'20", in NE1/4NW1/4 se
c. 13,
__ T.
.41 N.,
R.9 E.
, Cook County,
Poplar Creek tributary near Bartlett, 111.
Lat 42°01'28", long 88° 12' 10", in SE
1/4N
E1/4
sec.21,
T.41 N.
, R.9 E. ,
Cook County.
Poplar Creek at Elgin, 111.
Lat 42°01'35", long 88°15'20", in SE1/4NW1/4 sec. 19,
T.41 N.
, R.9 E.
, Cook County.
Brews ter Creek at Valley View, 111.
Lat 41°58'22", long 88°16'50", in SW
l/4SWl/4
sec.
1 ,
T.40 N. ,
R.8 E.
, Kane Co
unty
.
Norton Creek near Wayne, 111.
Lat 41°56'54", long 88°16'17", in NW1/4SE1/4 sec. 13,
T.40 N.
, R.8
E.,
Kane County.
Norton Creek near St.
Charles, 111.
Lat 41°56'42", long 88°18'22", in SW
1/4S
E1/4
se
c. 15,
T.40 N.
, R.8
E.,
Kane County.
*> 247
12 12 12
3,190
334
516
356 85
210
297
2.21
163
374
234
248
236
95 138
100
123
209
132
«s 308
_ .
26
22 25
4,450
404
855
456
124
290
498
321
251
.
550
410
414
411
206
231
211
222
350
244
o,. 347
___ 38 29 36
5,240
___
442
1,080
521
153
_
342
632
389
315
_
668
_-_
538
525
536
314
292
308
308
443
337
Q25 39
6
57 38 52
6,160
483
1,360
600
192
404
798
475
403
815
.
706
661
697
499
366
458
439
557
470
050 43
2 72 45 64
6,810
511
1,55
065
3
223
449
916
537
472
_
924
___
836
759
817
678
419
589
556
640
579
0,00 467
88 51 78
7,430
536
1,75
0703
255
493
1,030
597
546
_
1,03
0
966
853
938
899
470
740
690
719
700
Table 1. T-year peak discharges at gaging stations Continued
Map
No.
251
252
253
254
255
256
257
258
259
260
261
Station
No.
05551200
05551520
*05551530
05551620
05551650
05551700
05551800
05551900
05551930
*05552500
05554000
Station name an
d location
Person Creek near St.
Charles, 11
1.Lat 41°56
fOO"
, long 8802
0f30"
, in NEl/jSEl/j se
c. 20,
T.40 N.
, R.8
E. ,
Kane County.
Indian Creek near North Aurora,
111.
Lat 41°48'50
11, long 88°16'26", in SE1/4SW1/4 sec. 36,
T.39 N.
, R.8
E.,
Kane County.
Indian Creek at Aurora, 111.
Lat 41°45'59", long 88°18'24", in NW
1/4N
El/4
sec. 22,
T.38 N.
, R.8
E. ,
Kane County.
Blackberry Creek near Kaneville, 111.
Lat 41°48
I17", long 88°27'34", in SW1/4NEV4
sec.
5,
T.38 N.
, R.7
E. ,
Kane Co
unty
.
Lake Run
tributary near Batavia, 111.
Lat 41°50'45", long 88°24'20", near center of
sec. 23, T.39 N.
, R.7
E. ,
Kane County.
Blackberry Creek near Yorkville, 111.
Lat 41°40
I18",
long 88°26'29", in SE1/4NW1/4 sec. 21,
T.37 N.
, R.7 E. ,
Kendall County.
Fox River tributary No.
2 near Fox, 11
1.Lat 41°36'28", long 88°28'43", in NE
1/4S
W1/4
sec. 7,
T.36 N.,
R.7
E.,
Kendall County.
East Branch Big Rock Creek near Big Rock, 11
1.Lat 41°46'04", long 88°34'11", in NE1/4SE1/4 se
c. 17,
T.38 N.
, R.6
E.,
Kane County.
Welch Creek near Big Ro
ck,
111.
Lat 41°45'36", long 88°30'38", in SE1/4NE1/4 se
c. 23,
T.38 N.
, R.6
E.,
Kane County.
Fox River at Da
yton
, 111.
Lat 41°23'12", long 88°47'26", in SW1/4SE1/4 se
c. 29,
T.34 N.,
R.4
E.,
La Salle County.
North Fork Vermilion River near Charlotte, 11
1.Lat 40°50
108"
, long 88°17'58", in SE1/4SE1/4 se
c. 4,
T.27 N.
, R.8
E.,
Livingston County.
Q2 931
766
910
132
119
131
527
428
366
418 50 89 55
687
643
682 66 54 64
635
436
600
319
329
321
12,2
00
2,290
3,030
2,330
Qs 1,470
1,280
1,450
217
200
214
659
530
612
543
116
154
124
1,130
1,04
01,120
164
99
148
948
719
895
459
548
474
18,8
00
3,560
4,940
3,650
QIO
1,81
01,
630
1,780
277
254
272
732
589
776
622
181
199
186
1,420
1,310
1,41
0
257
132
220
1, 160
908
1,10
0
548
692
575
23,400
4,370
6,240
4,500
225
2,190
2,060
2,170
356
320
348
810
655
982
718
292
255
280
1,780
1,620
1,760
407
174
329
1,44
01,
140
1,35
0
658
871
701
29,300
5,310
7,850
5,520
Qso
2,450
2,370
2,44
0
416
367
405
860
700
1,130
785
400
296
362
2,040
1,850
2,010
542
206
422
1,640
1,310
1,54
0
735
1,000
793
33,800
5,960
9,040
6,240
QIOO
2,700
2,670
2,700
478
413
461
905
741
1,27
0849
531
337
455
2,280
2,070
2,240
697
238
525
1,850
1,47
01,
730
811
1,120
881
38,300
6,560
10,2
006,900
Tabl
e 1. T-year peak discharges at gaging stations Continued
Map
N
o.
262
263
26
4
26
5
266
267
268
26
9
270
271
272
Sta
tion
No.
05
55
45
00
05554600
05555000
05
55
53
00
05
55
54
00
05555775
05556500
05557000
05
55
71
00
05557500
05558000
Sta
tion
nam
e an
d
locati
on
Verm
ilio
n
Riv
er
at
Po
nti
ac,
111.
Lat
40
°52
'40
",
long
88
e38'1
0M
, in
SW
1/&
sec. 2
2,
T.2
8 N
.,
R.5
E
.,
Liv
ing
s to
n
County
.
Hud
C
reek
tr
ibuta
ry
near
Od
ell
, 111.
Lat
41
«0
0t5
0",
lo
ng
88«38'3
6M
, in
N
W1/
4 sec. 3
,T
.29
N
. ,
R.5
E
.,
Liv
ing
s to
n
Co
un
ty.
Verm
ilio
n
Riv
er
at
Str
eato
r,
111.
Lat
41«05'3
5",
lo
ng
88
«5
0'0
5M
, in
SE
1/4
sec.
2,
T.3
0
N.
, R
.3
E.
, L
ivin
gst
on
C
ounty
.
Verm
ilio
n
Riv
er
near
Leonore
, 1
11
.L
at
41°1
2'3
0",
lo
ng
88
e55'5
2M
, in
SW
1/JS
W1/
4 se
c. 30,
T.3
1
N.
, R
.2
E.,
La
Sall
e
Co
un
ty.
Verm
ilio
n
Riv
er
trib
uta
ry at
Lo
well
, 111.
Lat
41
»1
4'3
0",
lo
ng
89e0
0'3
5",
in
SE1/
4 se
c.
17,
T.3
2 N
.,
R.2
E
.,
La
Sall
e
County
.
Verm
ilio
n
Cre
ek tr
ibuta
ry at
Meri
den
, 111.
Lat
41°3
4'0
8",
long
89e0
1'2
8M
, o
n li
ne
bet
wee
n sees.
20
an
d
29,
T.3
6
N.
, R
.2
E.
, L
a S
all
e
County
.
Big
B
ure
au
Cre
ek at
Pri
nceto
n,
111.
Lat
41*2
1 '5
5",
long
89
*2
9 '5
5",
in
SW
l/jS
El/
j se
c.
18,
T.1
6
N.,
R.9
E
. ,
Bure
au
County
.
Wes
t B
ure
au
Cre
ek at
Wyan
et,
111.
Lat
41«21'5
4",
lo
ng
89
e34'0
8M
, in
N
El/fc
se
c. 2
1,
T.1
6
N.
, R
.8
E.,
B
ure
au
Co
un
ty.
Wes
t B
ure
au
Cre
ek tr
ibuta
ry
near
Wyan
et,
11
1.
Lat
41"
18' 4
0",
lo
ng
89«35'2
0M
, in
SE
1/4
sec. 5
,T
.15
N
. ,
R.8
E
. ,
Bure
au
Co
un
ty.
East
B
ure
au C
reek
n
ear
Bure
au,
111.
Lat
41e2
0'0
6M
, lo
ng
89«22'5
3M
, in
N
W1/
4NE1
/4 se
c.
31,
T.1
6
N.
, R
. 10
E.,
Bure
au
Co
un
ty.
Big
B
ure
au
Cre
ek at
Bure
au,
111.
Lat
41e
16M
OM
, lo
ng
89«23'0
0M
, in
S
El/4
sw1/
4 sec.
18,
T.1
5
N.
, R
.10
E.
, B
ure
au
Co
un
ty.
Q2 5,3
10
4,0
40
5,2
20 49 43 48
7,8
20
7,0
60
7,7
10
11,7
00
8,2
00
11
,50
0 25 35 27 42
45
43
4,2
50
3,8
80
4,2
20
2,7
70
2,4
70
2,7
50 81 95 83
2,3
70
3,2
30
2,4
20
8,0
40
8,0
70
8,0
50
QS
8,2
40
6,3
00
8,0
90 90 79 88
12,4
00
11
,00
01
2,1
00
19
,40
012,9
00
18,9
00 68
64 67 69 80 71
7,3
30
6,4
40
7,2
60
5,0
00
4,1
60
4,9
20
158
177
162
4,1
20
5,5
00
4,2
20
11
,70
013,3
00
12
,10
0
QIO
10,2
00
7,7
40
9,9
80
120
105
116
15,4
00
13,6
00
15,0
00
24,5
00
15,9
00
23
,90
0
115
85
105
88
104
92
9,2
90
8,1
80
9,2
00
6,7
30
5,3
20
6,5
60
222
23
722
6
5,3
70
7,1
00
5,5
10
14,1
00
16,9
00
14,9
00
Q25
12,6
00
9,5
10
12
,30
0
158
139
153
19
,20
01
6,8
00
18
,60
0
31,2
00
19
,60
030,1
00
202
113
168
112
134
118
11
,60
010,4
00
11
,50
0
9,1
40
6,8
10
8,8
50
317
318
317
7,0
00
9,1
40
7,1
90
17
,00
021,6
00
18,4
00
Qso
14,4
00
10
,80
01
4,0
00
186
165
180
21,9
00
19,0
00
21,2
00
36,1
00
22,2
00
34,7
00
292
133
22
6
131
157
138
13
,10
012,0
00
13,0
00
11,1
00
7,9
30
10,7
00
396
379
392
8,2
20
10
,70
08,4
50
19,1
00
24,9
00
21,0
00
Cioo
16
,10
01
2,0
00
15
,60
0
213
191
207
24,6
00
21,2
00
23,7
00
40
,80
024,8
00
39,1
00
40
615
42
96
149
179
158
14
,50
01
3,6
00
14
,40
0
13
,20
09,0
20
12
,60
0
48
34
43
47
2
9,4
40
12
,20
09,7
10
21,2
00
28,3
00
23,5
00
Table
1. T-year peak discharges at gaging stations Continued
Map
No.
273
274
275
276
277
Station
Station name and location
NO .
05558050
Coffee Creek tributary near Florid,
111.
Lat 41°14'25", long 89°18'00", in SE
1/4
sec. 14,
T.32 N.
, R.2
W. ,
Putnam County.
05558075
Coffee Creek tributary near Hennepin, 111.
Lat 41»14'35", long 89°18'25", near center of
sec.
14, T.32 N.
, R.2
W. ,
Putnam County.
05558500
Crow Creek (West) near Henry, 11
1.Lat 41°09'00", long 89°25'00", in SW
l/4SEl/4
sec. 36,
T.14 N.
, R.9
E.,
Putnam County.
05559000
Gimlet Creek at Sparland, 11
1.Lat 41*0 1*3
5",
long 89°26'20", in SE
1/4N
W1/4
se
c. 14,
T.12 N.
, R.9
E. ,
Marshall County.
05559500
Crow Creek near Washburn, 11
1.Lat 40°57'15", long 89°18'30", in SW
1/&
sec. 23,
T.29 N.
, R.
2 W. ,
Marshall County.
Q2
19 22 19 60 82 63
1,510
1,860
1,540
849
764
839
2,190
1,940
2,170
Qs
41 42 41 116
155
124
2,680
3,160
2,740
1,320
1,390
1,330
3,360
3,300
3,350
QIO 61 57 59
166
209
177
3,610
4,050
3,680
1,63
01,850
1,650
4,160
4,280
4,180
Q25
89 77 86
245
282
255
4,990
5,190
5,020
1,990
2,460
2,050
5,200
5,530
5,250
Qso 11
4 94 107
316
339
323
6,140
6,040
6,120
2,240
2,930
2,330
5,980
6,490
6,050
QIOO 14
011
013
0
400
396
399
7,410
6,890
7,310
2,480
3,410
2,600
6,780
7,430
6,870
278
*055
6000
0 Illinois River
at Pe
oria
, 11
1.
38,1
00
48,6
00
54,400
60,700
64,8
00
68,500
Lat 40
°42
I08"
, lo
ng 89°33'52", in
SW1/4N
Wl/4 sec.2,
T.8 N.
, R.8
E.,
Peoria Co
unty
.
27
9
*05560500
Far
m
Cre
ek
at
Fa
rmd
ale
, 111.
570
713
803
913
993
1,0
70
La
t 4
0°3
9'5
5"
, lo
ng
89°3
0'1
5"
, in
N
E1/
4SE
1/4
sec.
36,
T.2
6 N
.,
R.4
W
., T
aze
wel
l C
ou
nty
.
280
05
56
10
00
A
cker
man
C
reek
at
Far
md
ale,
111.
656
1,3
90
2,0
00
2,9
10
3,6
60
4,4
90
Lat
40
°39
'43
",
lon
g
89°3
0'1
3"
, in
SE
1/4S
E1/
4 se
c.3
6,
957
1,7
70
2,4
00
3,2
50
3,9
30
4,6
10
T.2
6
N.,
R
.4
W.,
Ta
zew
ell
Cou
nty
. 69
0 1,4
40
2,0
70
2,9
70
3,7
20
4,5
10
281
*055
6150
0 F
on
du
lac
Cre
ek
nea
r E
ast
P
eoria
, 111.
252
363
439
538
612
688
Lat
40
°40
'38
",
lon
g
89°3
1I5
2"
, on
li
ne
bet
wee
n
SWl/j
an
d
SE1/
4 se
c.2
6,
T.2
6 N
.,
R.4
W
., T
aze
wel
l C
ou
nty
.
282
*055
6200
0 F
arm
C
reek
at
East
P
eori
a,
111.
3,4
90
7,0
10
10
,10
0
14
,70
0
18
,80
0
23,3
00
Lat
40
°40
'04
",
lon
g
89
°34
'40
",
in
SW1/
4NW
1/4
sec.3
3,
T.26 N.
, R.
4 W.
, Tazewell Co
unty
.
283
05563000
Kickpaoo Creek near Kickapoo, 111.
7,380
13,700
18,800
26,100
32,100
38,500
Lat 40°48'00", long 89°48'00", in SW1/4SE1/4 sec.34,
4,370
7,500
9,710
12,600
14,800
16,900
T.10 N., R.6 E.
, Peoria County.
7,060
12,900
17,300
23,500
28,500
33,900
Table
1. T-year peak discharges at ga
ging
stations Continued
Ui
Map
No.
284
285
286
287
288
289
290
291
292
293
294
Station
No.
05563100
05563500
05564400
05564500
05565000
05566000
05566500
05567000
05567500
05567800
05568000
Stat
ion
name
and location
Kickapoo Cr
eek
trib
utar
y ne
ar Ki
ckap
oo,
111.
Lat 40
°47'
40",
long 89°46'30", in NW
1/4
sec. 1
,T.9 N.
, R.
6 E.
, Peoria Co
unty
.
Kickapoo Cr
eek
at Pe
oria
, 11
1.Lat 40»40
>52"
, long 89»39'19", in
NE1/4NW1/4 sec. 13,
T.8
N. ,
R.
7 E.
, Peoria Co
unty
.
Money Cr
eek
near
To
wand
a, 111.
Lat 40°36'19", lo
ng 88°53
t56",
in SW
1/4S
W1/4
se
c. 20,
T.25 N.
, R.3
E.,
McLean Co
unty
.
Money Cr
eek
abov
e Lake Bloomington, 111.
Lat 40«37
>13"
, lo
ng 88°54'59", in SE1/4SW1/4 se
c. 18,
T.25 N.
, R.3
E. ,
McLean Co
unty
.
Hick
ory
Creek
above
Lake
Bl
oomi
ngto
n, 111.
Lat 40°38'15", long 88
e57'
00",
in
SW1/4SE1/4 sec. 11,
T.25 N. ,
R.2
E.,
McLe
an Co
unty
.
East Branch Pa
nthe
r Creek
near
Gridley, 111.
Lat 40°46'00", long 88
°54'
35",
between sees. 29
an
d__ 10^
T.27 N«,
R.3
E. ,
Livingston Co
unty
.
East Branch Pa
nthe
r Creek
at El Pa
so,
111.
Lat 40
°45'
15",
lo
ng 89
e00'
20",
on li
ne be
twee
n sees.
32 and 33
, T.
27 N.
, R.2
E. ,
Woodford Co
unty
.
Pant
her
Cree
k ne
ar El Paso,
111.
Lat 40
°46'
05",
long 89
°04'
30",
in ce
nter
of se
c. 26,
T.27 N. ,
R.
1 E. ,
Woodford Co
unty
.
Mackinaw River
near Congerville, 11
1.Lat 40°37'25", lo
ng 89
°14'
30",
in
NE
1/4S
W1/4
se
c. 17,
T.25 N. ,
R. 1
W.
, Woodford Co
unty
.
Indian Creek
tributary
near
Ho
peda
le,
111.
Lat 40°24
135",
long
89
°27'
45",
in NW
1/4N
E1/4
se
c. 32,
T.23 N.,
R.3
W.,
Tazewell Co
unty
.
Mackinaw Ri
ver
near
Gr
een
Vall
ey,
111.
Lat 40
«26
>43"
, long 89<>39"\0",
in SE
1/4N
W1/4
se
c. 15,
T.23 N. ,
R.5
W. ,
Tazewell Co
unty
.
Q2
27 31 28
7,690
7,500
7,670
885
1,040
902
946
951
948
521
384
499
152
262
162
571
592
573
2,220
1,390
2,140
8,510
5,410
8,280
192
124
171
8,070
8,430
8,090
Qs
64 59 63
13,000
12,700
13,000
1,380
1,79
01,440
1,520
1,610
1,540
1,000
675
942
284
461
314
1,100
1,00
01,
080
4,080
2,340
3,850
14,8
008,850
14,100
331
230
298
14,900
13,900
14,800
QIO 99 79 94
17,5
0016,300
17,3
00
1,73
02,320
1,82
0
1,970
2,080
1,990
1,350
885
1,250
402
604
446
1,580
1,29
01,530
5,560
3,010
5,150
20,100
11,200
18,7
00
432
310
388
21,000
17,8
0020,700
225 15
5106
141
24,500
20,900
23,800
2,190
3,010
2,330
2,590
2,690
2,610
1,79
01,160
1,640
592
791
643
2,390
1,660
2,210
7,690
3,860
6,950
28,100
14,300
25,300
562
418
507
31,000
22,800
29,800
Qso 207
127
182
30,700
24,400
29,300
2,540
3,520
2,710
3,090
3,130
3,100
2,120
1,370
1,940
764
931
811
3,150
1,94
02,820
9,440
4,500
8,410
35,000
16,5
0031,000
662
501
600
40,200
26,400
38,000
Cioo 26
7149
229
37,800
28,000
35,600
2,880
4,050
3,100
3,640
3,580
3,620
2,430
1,58
02,220
971
1,07
01,
000
4,060
2,210
3,520
11,300
5,140
9,950
42,900
18,700
37,200
762
586
693
51,200
30,100
47,500
Table 1. T-year peak discharges at gaging stations Continued
to
Map
N
o.
295
29
6
297
298
299
300
301
302
303
304
Sta
tion
No.
*0 5
568500
*0
55
68
65
0
05568800
05
56
88
50
05
56
95
00
05569825
05
57
00
00
*0 5
57
03
50
*0
55
70
36
0
05
57
03
70
Sta
tion
na
me
and
lo
cati
on
Illi
no
is
Riv
er
at
Kin
gst
on
M
ines
, 111.
Lat
40°3
3'1
0"
/ lo
ng
89°4
6'4
0",
in
S
E1/
4SE
1/4
sec.
26,
T.7
N
. ,
R.6
E
. ,
Peori
a
County
.
Duc
k C
reek near
Can
ton,
111.
Lat
40°3
2'4
5",
lo
ng S
g-s
g'S
S",
in
E
1/2
sec.
36
,T
.7
N.
, R
.4 E
.,
Fult
on C
ounty
.
India
n
Cre
ek
near
Wyo
min
g,
111.
Lat
41
°OV
06
",
long 8
9»
50
'07
",
in
SE
1/4S
E1/
4 se
c.
17
,T
.12
N
. ,
R.6
E
. ,
Sta
rk
County
.
Form
an
Cre
ek tr
ibuta
ry
near
Vic
tori
a,
11
1.
Lat
41°0
2'3
0",
lo
ng
90°0
9I2
0",
in
SW
V4N
W1/
4 se
c.
10
,T
.12
N
. ,
R.3
E
.,
Kno
x C
ou
nty
.
Spoon
Riv
er
at
Lo
nd
on
M
ills
, 111.
Lat
40
°42
'32
",
long
90»16'5
3",
in
SW
1/4N
E1/
4 se
c. 4
,T
.8
N.
, R
.2
E.,
F
ult
on
County
.
Cedar
Cre
ek tr
ibuta
ry at
St.
A
ugust
ine,
111.
Lat
40°4
3I2
0",
lo
ng 90°2
4'4
0",
in
E
1/2
sec.
32,
T.9
N
.,
R.
1 E
.,
Kno
x C
ou
nty
.
Spoon
Riv
er
at
Sevil
le,
111.
Lat
40°2
9t0
8",
lo
ng
90
-20
'34",
in
NE1
/4N
W1/
4 se
c.
24
,T
.6 N
.,
R. 1
E
.,
Fult
on C
ounty
.
Big
C
reek
at
St.
D
avid
, 1
11
.L
at
40029'5
1",
long
gO^O
S1^
",
in
SE
1/4S
E1/
4 se
c.
16,
T.6
N
. ,
R.4
E
.,
Fult
on
County
.
Evel
yn
Bra
nch
n
ear
Bry
ant,
1
11
.L
at
40°2
9'1
5",
lo
ng
9000
6'0
8n,
in
NW
V4S
W1/
4 se
c.
19,
T.6
N
. ,
R.4
E
.,
Fult
on
County
.
Big
C
reek
near
Bry
ant,
1
11
.L
at
4002
7'3
2",
lon
g
90
°08
'00
",
in cente
r of
sec.
35,
T.6
N
.,
R.3
E
. ,
Fu
lto
n
County
.
Q2
47,6
00
67
1,5
10
1,4
00
1,5
00
104
138
111
9,9
30
8,8
50
9,8
60
385
339
379
12,6
00
11,6
00
12,6
00
872
69
818
1,3
70
910
Qs
63,8
00
103
2,4
20
2,4
10
2,4
20
195
25
921
0
15,5
00
14,7
00
15
,30
0
61
762
16
18
19
,30
01
9,1
00
19,3
00
1,2
40
116
1,0
60
2,4
20
1,2
80
do
73,5
00
12
9
3,1
10
3,1
40
3,1
20
26
635
02
88
19
,70
01
8,8
00
19,6
00
79
68
34
80
5
23,9
00
24,3
00
23,9
00
1,5
00
149
1,2
00
3,1
90
1,5
20
Q25
84,7
00
163
4,1
00
4,0
80
4,1
00
366
47
439
6
25,8
00
24,1
00
25,5
00
1,0
50
1,1
20
1,0
70
29,8
00
31,1
00
29,9
00
1,8
20
189
1,3
50
4,2
10
1,8
40
Qso
92,4
00
189
4,9
20
4,8
10
4,8
90
44
65
70
48
3
30,9
00
28,1
00
30
,40
0
1,2
60
1,3
40
1,2
80
34,2
00
36,2
00
34
,40
0
2,0
70
219
1,4
50
4,9
90
2,0
60
QIOO
99,6
00
21
6
5,8
10
5,5
20
5,7
30
530
66
857
1
36,5
00
32,0
00
35,6
00
1,4
90
1,5
60
1,5
10
38,7
00
41,2
00
38
,90
0
2,3
30
247
1,5
40
5,7
80
2,2
70
305
*05570380
Slug Run near Br
yant
, 11
1.Lat 40°28
I24",
long 90»08'37", in
SE1/4NE1/4 sec.27,
T.6 N.
, R.3
E.,
Fulton County.
142
239
304
382
438
491
Tabl
e 1. T-year peak discharges at ga
ging
stations Continued
Ul
Map
N
o.
306
30
7
30
8
309
310
311
312
31
3
314
31
5
316
Sta
tion
No.
05571000
05572000
05572100
05572450
05
57
25
00
05
57
40
00
05
57
45
00
05
57
55
00
05
57
58
00
*0
55
76
00
0
05576500
Sta
tion
nam
e an
d lo
cati
on
San
gam
on
Riv
er
at
Mah
om
et,
111.
Lat
40
°ir
30
",
long 8
8°2
4'0
0",
in
N
E1/
4SW
1/4
sec.
15,
T.2
0
N.
, R
. 7
E.
, C
ham
pai
gn
County
.
San
gam
on
Riv
er
at
Monti
cell
o,
111.
Lat
40°0
1'5
1",
lo
ng
88°3
5'2
0",
in
N
El/
jSW
l/j
sec.
12,
T.1
8
N.
, R
.5
E.
, P
iatt
C
ounty
.
Wil
dcat
Cre
ek
trib
uta
ry
near
Mo
nti
cell
o,
11
1.
Lat
40°0
1'3
7",
long
88°3
8'2
4",
in
SW
1/4S
E1/
4 se
c. 9,
T.1
8
N.,
R.5
E
.,
Pia
tt
County
.
Fri
en
ds
Cre
ek
at
Arg
enta
, 1
11
.L
at
39
°59
'21
",
long 8
8°4
8'1
8",
in
SE
1/4N
E1/
4 se
c.
25,
T.1
8
N.
, R
.3
E.,
M
acon
C
ounty
.
San
gam
on
Riv
er
near
Oak
ley
, 111.
Lat
39°5
5'0
9",
lo
ng 88°4
8'0
9",
in
SE
1/4N
E1/
4 se
c. 24,
T.1
7
N.
, R
.3 E
.,
Mac
on
Co
un
ty.
South
F
ork
S
angam
on R
iver
near
No
ko
mis
, 111.
Lat
39»21'1
2",
lo
ng 8
9»
15
'05
",
in
NE
1/4S
E1/
4 se
c.
36,
-T-^
ll
N-,
R
.2
W»,
C
hri
sti
an
Co
un
ty.
Fla
t B
ranch
n
ear
Taylo
rvil
le,
11
1.
Lat
39°3
3'1
4",
lo
ng
89
° 15
* 12",
in
S
E1/
4SE
1/4
sec.
24,
T.1
3
N.,
R.2
W
., C
hri
sti
an
County
.
South
F
ork
S
anga
mon
R
iver
at
Kin
caid
, 111.
Lat
39°3
4'4
4",
lo
ng 89°2
3'3
1",
in
SW
l/4N
El/
4 se
c.
14
,T
.13
N
.,
R.3
W
., C
hri
sti
an
County
.
Hors
e C
reek
at
Paw
nee
, 111.
Lat
39
°34
'56
",
long
89
«3
4'2
0",
in
N
E1/
4NE
1/4
sec.
18
,T
.13
N
. ,
R.4
W
. ,
San
gam
on
Co
un
ty.
So
uth
F
ork
S
angam
on
R
iver
near
Rochest
er,
1
11
.L
at
39°4
4'3
2",
lo
ng 89°3
4'0
2",
in
N
E1/4
NW
1/4
sec. 20,
T.1
5
N.
, R
.4
W.,
San
gam
on
County
.
San
gam
on
Riv
er
at
Riv
ert
on
, 111.
Lat
39°5
0'3
4",
lo
ng
89°3
2I5
2",
in
N
Wl/
jNE
l/j
sec.
16,
T.1
6
N.,
R.4
W
. ,
San
gam
on
County
.
Q2
4,1
30
3,7
30
4,0
90
5,4
20
4,5
60
5,4
00 30 19 28
1,6
30
1,9
50
1,6
80
5,6
50
6,1
00
5,6
90
1,0
00
71
99
68
3,9
90
2,8
60
3,8
80
4,4
80
5,4
80
4,5
20
1,9
20
1,3
70
1,8
20
5,7
20
15
,80
01
2,6
00
15,7
00
Qs
7,0
60
6,2
10
6,9
70
8,9
50
7,5
30
8,8
90 47 36 45
2,7
70
3,3
30
2,8
90
9,2
00
10
,00
09
,33
0
2,0
00
1,3
10
1,8
50
6,6
10
4,7
50
6,4
10
7,9
60
9,1
40
8,0
40
2,9
80
2,3
90
2,8
70
9,7
50
25,2
00
20,5
00
25,0
00
do
9,2
50
7,9
60
9,0
60
11,5
00
9,5
90
11,4
00 58 48 56
3,6
60
4,3
20
3,8
40
11,9
00
12,8
00
12,1
00
2,9
30
1,7
50
2,6
20
8,3
90
6,0
70
8,1
10
10,7
00
11,7
00
10,8
00
3,6
30
3,1
20
3,5
30
12,5
00
31,2
00
26
,00
03
0,9
00
22
5
12,2
00
10,2
00
11,9
00
14,7
00
12,2
00
14
,60
0 71 65 70
4,9
70
5,5
80
5,1
50
15,8
00
16
,30
015,9
00
4,5
00
2,3
50
3,8
40
_
10,6
00
7,7
40
10,2
00
14,6
00
15,0
00
14,6
00
4,4
10
4,0
80
4,3
40
15,8
00
38,2
00
33,0
00
37,9
00
Qso
14
,60
011,9
00
14,1
00
17,2
00
14
,20
017,0
00 80 78 80
6,0
40
6,5
50
6,2
10
18,9
00
18,9
00
18,9
00
6,0
00
2,8
10
4,9
50
12,2
00
8,9
90
11
,70
0
17
,70
017,5
00
17
,70
0
4,9
30
4,8
20
4,9
00
18,3
00
-
43,1
00
38
,30
042,8
00
QIOO
17
,00
01
3,5
00
16
,40
0
19
,70
01
6,1
00
19,5
00 89
91 90
7,2
30
7,5
00
7,3
30
22,3
00
21,5
00
22,1
00
7,8
20
3,2
80
6,2
70
13,8
00
10
,30
01
3,3
00
21,1
00
20,0
00
21,0
00
5,4
20
5,5
50
5,4
50
20,6
00 -
47
,60
043,6
00
47,3
00
Table 1. T-year peak discharges at gaging stations Continued
Map
N
o.
317
318
31
9
32
0
321
322
323
Sta
tion
. S
tati
on
nam
e an
d lo
cati
on
No.
05577500
Spri
ng C
reek
at
Sp
rin
gfi
eld
, 111.
Lat
39°4
8'5
7",
lo
ng
89°4
1'5
7",
in
NW
1/4N
EV
4 se
c. 30,
T.1
6
N.
, R
.5
W.,
S
ang
amo
n
Co
un
ty.
05
57
77
00
S
anga
mon
R
iver
trib
uta
ry at
Andre
w,
11
1.
Lat
39°5
3'4
5",
lo
ng 89°3
8'5
0",
near
cente
r of
sec.
27,
T.1
7
N.,
R
.5
W. ,
San
gam
on
Co
un
ty.
05
57
85
00
S
alt
C
reek
n
ear
Row
el 1
, 111.
Lat
40°0
6'5
4",
lo
ng 8
9°0
2'5
7",
in
NE
1/4S
El/
4
Sec.1
1,
T.1
9 N
.,
R.1
E
.,
De
Wit
t C
ou
nty
.
05579500
Lak
e F
ork
near
Com
land,
111.
Lat
39°5
7'0
0",
long 89°2
3'1
0",
in
SW
l/4 sec.1
,T
.17
N
.,
R.3
W
.,
Logan
C
ou
nty
.
05
57
97
50
K
ickpao
o
Cre
ek tr
ibuta
ry at
Hey
wo
rth
, 111.
Lat
40
°19
'05
",
long 88°5
8'5
5",
in
NW1/4
SW1/
4 se
c. 3
4,
T.2
2 N
.,
R.2
E
. ,
McL
ean
County
.
05580000
Kic
kap
oo
Cre
ek at
Hay
nesv
ille
, 111.
Lat
40
°15
'20
",
lon
g 8
9°0
7'4
0",
on
li
ne
bet
wee
nsees.
19
and
20,
T.2
1
N.
, R
.1
E.
, D
e H
itt
County
.
05
58
05
00
K
ickap
oo
Cre
ek
near
Lin
coln
, 1
11
.L
at
40°1
1'3
0",
lo
ng 89°2
1'4
0",
in
N
E^N
WV
a se
c.
18,
T.2
0 N
.,
R.2
W
.,
Logan
C
ou
nty
.
Q2
1,8
10
2,3
80
1,8
50
21
72
15
21
7
3,7
00
3,3
90
3,6
70
2,0
70
3,5
00
2,1
50
40
9
231
37
2
4,1
30
3,8
00
4,1
10
4,5
20
4,8
60
4,5
40
05
3,6
90
4,1
20
3,7
30
38
84
04
392
7,3
60
5,6
40
7,1
60
4,1
50
5,9
80
4,3
60
74
5
42
06
44
7,7
40
6,5
20
7,5
70
8,3
00
8,3
20
8,3
00
do
5,2
20
5
,38
05
,24
0
51
45
48
521
10
,50
0
7,2
10
10
,10
0
6,1
20
7,7
60
6,3
80
1,0
30
56
086
1
10,9
00
8,4
70
10,5
00
11
,50
010,8
00
11
,40
0
«25
7,4
10
7,0
30
7,3
60
681
74
66
95
15
,40
0
9,2
30
14
,40
0
9,5
10
10
,10
09
,62
0
1,4
50
74
61,1
70
15
,80
01
1,0
00
14
,80
0
16
,40
01
4,1
00
16
,10
0
QSO
9,2
00
8,3
00
9,0
80
80
98
99
83
0
19,7
00
10,7
00
18
,00
0
12,8
00
11,9
00
12,6
00
1,8
10
88
91,4
40
20,1
00
13,0
00
18,6
00
20,7
00
16,6
00
20,0
00
QIOO
11,1
00
9,5
70
10,9
00
94
01
,06
09
66
24,5
00
12,2
00
22,0
00
16,8
00
13
,60
01
6,1
00
2,2
20
1,0
40
1,7
20
25,2
00
14,9
00
22,8
00
25
,50
019,1
00
24
,40
0
324
*05580700
Salt
Creek tributary at Middletown, 11
1.Lat 40
006'00", long 89«34'55", in EV5 sec.18,
T.19 N.,
R.4
W.,
Logan Covmty.
325
*05580950
Sugar Creek near Bloomington, 11
1.Lat 40°28"18", long 89°01'46", in NE1/4NW1/4 sec.7,
T.23 N.
, R.2 E.
, McLean County.
326
05581500
Sugar Creek near Hartsburg, 11
1.Lat 40°13
t20"
, long 89°24'12", in SE1/4SW1/4 sec.35,
T.21 N.,
R.3 W.
, Logan County.
327
05582000
Salt Creek near Greenview, 11
1.Lat 40°08'01", long 89°44'08", in NE
1/4N
E1/4
sec.2,
T.19 N.
, R.6 W.
, Mason County.
122
3,240
299
4,130
456
4,710
696
5,430
899
5,950
1,120
6,480
5,690
5,510
5,680
12,900
8,830
12,600
11,200
9,440
11,000
21,700
14,700
21,000
16,300
12,300
15,600
28,100
18,700
27,000
24,500
16,100
22,800
36,400
24,000
34,800
32,100
18,900
29,200
42,900
27,900
40,800
41,200
21,800
36,600
49,400
31,800
46,900
Table
1. T-year peak discharges at gaging stations Continued
Map
Stat
ion
No.
No.
328
05582200
329
05582500
330
05583000
331
05584400
332
05584450
333
05584500
334
*05584950
335
05585000
336
05585220
337
*05585500
338
05585700
Station name and location
Cabiness Creek tributary near Petersburg, 111.
Lat 40°02'00", long 89°46'35", in NE1/J
sec.
9,
T.18 N. ,
R.6 W.,
Menard County.
Crane Creek near Easton,
111.
Lat 40° 14
*46"
, long 89°51'40", in NE
1/4N
W1/4
se
c. 26,
T.21 N.
, R.7 W.,
Mason County.
Sangamon River near Oakford, 111.
Lat 40°07'25", long 89°59'05", in NWl/jSEl/j se
c. 3,
T.19 N. ,
R.8 W.
, Mason County.
Drowning Fork at Bushnell, 11
1.Lat 4C'33'45", long 90°31'23", in NE1/4SE1/4 sec. 29,
T.7 N.
, R. 1 W., McDonough County.
Wigwam Hollow Creek near Ma comb, 11
1.Lat 40°29'05", long 90°42'25", in SE
1/4S
W1/4
se
c. 23,
T.6 N.
, R.
3 W. ,
McDonough County.
La Moine River at Co
lmar
, 111.
Lat 40°19'45", long 90°53'55", in SE1/4SW1/4 se
c. 18,
T.4 N. ,
R.4 W.,
McDonough County.
West Creek at Mount Sterling, 111.
Lat 39°59'45", long 90°46'05", near center of
sec.
8,
T.1
S.,
R.3
W. ,
Brown County.
La Moine River at Ripley,
111.
Lat 40°01'28", long 90°37'55", in
SW1/4NE1/4 sec. 33,
T.1 N. ,
R.2 W. ,
Brown County.
Indian Creek tributary near Sinclair, 11
1.Lat 39°48'42", long 90°06'15H
, in NW1/4
sec.
27,
T.16 N.,
R.9 W.
, Morgan County.
Illinois River at Meredosia, 111.
Lat 39049'
24",
long 90°34'05", in SE1/4
sec. 21,
T.16 N.
, R.13 W. ,
Morgan County.
Dry Fork tributary near Mount Sterling, 11
1.Lat 39
057
'46"
, long 90°45'35", in SW1/4
sec.
21,
T.1
S.,
R.3
W. ,
Brown Co
unty
.
»2
126
115
124
224
509
239
22,400
23,000
22,400
664
811
679
211
155
197
8,470
8,300
8,450
230
___
8,950
10,200
8,990
392
354
385
62,700
32 38 33
05 31
3214
289
401
861
431
38,200
37,100
38,200
1,270
1,420
1,290
343
301
331
15,200
14,100
15,100
369
14,000
16,900
14,100
724
656
713
86,000
___ 51 73 55
«,. 497
288
438
526
1,100
568
49,000
46,900
48,900
1,740
1,85
01,750
432
415
427
20,400
18,300
20,200
470
17,500
21,600
17,800
971
883
955
99,800
--- 64 100 70
»»
800
386
667
684
1,42
0746
62,200
59,400
62,100
2,390
2,420
2,390
543
574
552
27,600
23,700
27,100
605
___
22,300
27,600
22,800
1,300
1,190
1,270
116,000
80
136
91
050
1,08
0463
867
800
1,650
879
71,800
68,700
71,600
2,900
2,860
2,900
625
700
647
33,300
27,900
32,500
712
26,100
32,100
26,600
1,550
1,430
1,520
126,000
___ 92 164
106
QIOO
1,420
542
1,10
0
914
1,88
01,010
80,900
78,000
80,700
3,440
3,300
3,410
705
832
741
39,300
32,100
38,200
822
29,900
36,600
30,500
1,79
01,
680
1,770
137,000
104
193
122
Table 1. T-year peak discharges at
gaging stations Continued
Ui
Map
N
o.
33
9
340
341
342
343
34
4
34
5
346
347
348
Sta
tion
S
tati
on
nam
e an
d lo
cati
on
NO
.
05586000
No
rth
F
ork
M
auvai
se T
err
e
Cre
ek
near
Jacksonvil
le,
111.
Lat
39
°45
'38
",
lon
g 90°0
8'0
7",
in
SE
1/4N
W1/
4 sec. 8
,T
.15
N.,
R.9
W
., M
orga
n C
ounty
.
05586200
Illi
no
is
Riv
er
trib
uta
ry at
Flo
rence,
11
1.
Lat
39
°37
'55
",
lon
g 90°3
7'0
5",
in
N
E1/4
NW
1/4
sec.
15,
T.5
S
.,
R.2
W
. ,
Pik
e C
ou
nty
.
05586350
Lit
tle
San
dy
Cre
ek tr
ibuta
ry
near
Mu
rray
vil
le,
111.
Lat
39°3
6'0
5",
lo
ng
9
0»
17
'45
",
in
NW
1/4
sec. 2,
T.1
3
N.,
R.1
1
W.,
Morg
an
County
.
05586500
Hu
rric
an
e
Cre
ek
near
Ro
od
ho
use
, 111.
Lat
39
°29
'20
",
lon
g 90°2
5'0
0",
in
N
E1/
4 se
c.
15,
T.1
2
N.
, R
. 12
W
., G
reen
e C
ou
nty
.
05586850
Bear
Cre
ek tr
ibuta
ry near
Reeders
, 111.
Lat
39°1
7'4
0",
lo
ng
90°0
1'0
5",
in
S
El/
j sec.
19,
T.1
0
N.
, R
. 8
W.,
Mac
oupin
C
ounty
.
05
58
70
00
M
aco
up
in
Cre
ek
near
Xan
e,
111.
Lat
39°1
4'0
3",
lo
ng 9
0°2
3'4
0"
in
SE
1/4S
E1/
4 se
c.
11,
T.9
N
. ,
R.
12
W. ,
G
reen
e C
ounty
.
05587850
Cah
ok
ia
Cre
ek tr
ibuta
ry
No.
2
near
Carp
en
ter,
1
11
.L
at
38°5
2'4
0",
lo
ng 89°5
4'3
0",
in
S
EV
4SE
1/4
sec.
18,
T.5
N
. ,
R.7
W
.,
Mad
ison
County
.
05
58
79
00
C
aho
kia
C
reek
at
Ed
ward
svil
le,
11
1.
Lat
38°4
9'2
8",
lo
ng
89
e5
8'2
9",
in
NW
1/4S
E1/
4 se
c. 3
,T
.4
N.,
R.8
W
., M
adis
on
County
.
05588000
India
n
Cre
ek at
Wan
da,
111.
Lat
38°5
0'3
0",
lo
ng 9
0°0
1'5
9",
in
SE
1/4N
W1/
4 se
c. 31,
T.5
N
.,
R.8
W
.,
Mad
ison
County
.
05
58
95
00
C
ante
en
Cre
ek at
Case
yvil
le,
111.
Lat
38°3
8'3
5",
lo
ng
90°0
1'0
0",
in
N
1/5N
W1/
4 se
c. 8
,T
.2
N.
, R
.8
W.,
St.
C
lair
C
ounty
.
«2 94
21,4
30
97
7
32
42
23
30
4
40
84
10
40
9
20
83
36
219 12 13 12
9,7
90
11,8
00
9,8
90
156
121
150
4,7
80
5,6
60
4,9
10
1,8
60
1,8
80
1,8
60
1,8
10
1,5
10
1,7
90
* 1,9
00
2,4
70
1,9
50
561
43
05
36
791
762
783
397
610
42
3 21 24 22
17,8
00
19,3
00
17,9
00
29
922
528
4
6,7
00
9,5
70
7,1
10
3,4
70
3,2
60
3,4
40
3,2
50
2,6
40
3,1
80
«,.
2,5
90
3,2
00
2,6
50
718
58
769
2
1,0
80
1,0
30
1,0
60
553
80
55
89 29 32 29
23,6
00
24,4
00
23,6
00
40
730
138
5
7,7
80
12,3
00
8,4
70
4,7
90
4,2
30
4,7
20
4,3
80
3,4
60
4,2
60
22
5
3,4
80
4,1
40
3,5
50
90
68
05
88
5
1,4
60
1,3
80
1,4
30
78
31,0
70
830 39 44 40
31,0
00
30,8
00
31,0
00
557
40
452
1
8,9
30
15
,80
01
0,1
00
6,7
30
5,5
00
6,5
50
5,9
70
4,5
20
5,7
50
Qso
4,1
10
4,8
50
4,2
00
1,0
40
97
51,0
20
1,7
50
1,6
50
1,7
20
97
91
,27
01
,03
0 48 52 49
36
,60
035,6
00
36,6
00
67
548
262
7
9,6
80
18,4
00
11,2
00
8,3
80
6,4
40
8,0
70
7,2
60
5,3
30
6,9
50
QIOO
4,7
20
5,5
70
4,8
30
1,1
60
1,1
50
1,1
60
2,0
50
1,9
40
2,0
10
1,1
90
1,4
70
1,2
40 57 61 58
42,3
00
40,5
00
42,1
00
79
656
273
6
10,3
00
21
,00
012,2
00
10,2
00
7,4
10
9,7
30
8,6
70
6,1
50
8,2
40
Tabl
e 1. T-year peak discharges at
ga
ging
stations Continued
Map
Station
No.
No.
Station name and
location
Q2
QIOO
Ul
00
349
*05589780
Little Canteen Creek tributary near Collinsville,
111.
Lat 38°37'38", long 89°59'04", in NW
1/4N
W1/4
sec. 15,
T.2 N.,
R.8
W.,
St.
Clair County.
350
05590000
Kaskaskia Ditch at Bondville, 111.
Lat 40°06'47H
, long 88020'55", in NW1/4NW1/4 se
c. 18,
T.19 N.,
R.8
E.,
Champaign County.
351
05590400
Kaskaskia River near Pesotum, 111.
Lat 39°52'44", long 88°22'35", on north boundary
of se
c.2,
T.16 N.,
R.7
E.,
Douglas County
352
05590500
Kaskaskia River at Ficklin, 111.
Lat 39°48'00", long 88°21
t55H
, in SW1/4NW1/4 sec.36,
T.16 N.
, R.7 E.,
Douglas County.
353
05590800
Lake Po
rk at Atwood, 11
1.Lat 39°48'30", long 88°28'34", in NE1/4NW1/4 sec.36,
T.16 N.,
R.6 E.
, Piatt County.
354
05591200
Kaskaskia River at Cooks Mills, 11
1.Lat 39»35'01", long 88"24"50", in NW1/4SW1/4 sec. 10,
T.13 N.,
R.7
E.,
Coles County.
355
05591500
Asa Creek at Sullivan, 111.
Lat
39
°37
'11
",
lon
g
88«36'1
7"
, in
N
El/4
NE
l/4
sec.3
5,
T.1
4
N.,
R.5
E
.,
Mou
ltri
e C
ou
nty
.
356
05
59
17
50
S
trin
gto
wn
B
ran
ch tr
ibu
tary
n
ear
Lak
e C
ity
, 111.
Lat
39°4
6"
\5"
, lo
ng
88°4
3'1
0"
, in
S
El/
4 sec.2
, T
.15
N
.,
R.4
E
.,
Mou
ltri
e C
ou
nty
.
357
05592000
Kask
ask
ia
Riv
er a
t S
helb
yvil
le,
111.
Lat
39
°24
'25
",
lon
g
88°4
6'5
0"
, in
SE
1/4S
WV
4 sec.8
, T
.11
N.,
R.4
E
.,
Sh
elb
y
Cou
nty
.
358
05592025
Mud
C
reek
tr
ibu
tary
n
ear
Tow
er H
ill,
11
1L
at
39
»2
5'5
5"
, lo
ng
88
057'2
0"
, in
N
E1/
4 sec.3
, T
.11
N.,
R.2
E
.,
Sh
elb
y
Cou
nty
.
359
*0
55
92
10
0
Kask
ask
ia
Riv
er
nea
r C
owd
en,
11
1.
Lat
39
°13
'50
",
lon
g
88°5
0'3
3"
, in
N
Wl/j
NW
l/j
sec.
14,
T.9
N
.,
R.3
E
.,
Sh
elb
y
Cou
nty
.
171
37
85
61
844
1,0
90
1,3
60
362
1/4 se
c. 18,
723
383
1,810
xmndary
1,790
ity.
1,810
1,950
1/4 sec. 36,
1,910
1,940
2,370
1/4 sec. 36,
2,380
2,380
5,090
1/4 sec. 10,
4,530
5,000
338
I/4 se
c. 35,
365
340
:y,
111.
52
jc.2
, 97
58
9,420
l/4 sec. 8,
8,280
9,330
114
ic.3,
66
104
640
1,250
695
2,450
2,910
2,540
3,220
3,100
3,180
3,070
3,880
3,250
7,400
7,190
7,360
658
618
653
86
173
98
16,000
13,100
15,800
224
122
195
865
1,630
948
2,860
3,660
3,030
4,110
3,870
4,050
3,500
4,880
3,840
8,830
8,950
8,850
904
791
889
109
226
126
20,600
16,300
20,100
316
164
267
1,200
2,110
1,320
3,360
4,570
3,660
5,270
4,840
5,130
4,010
6,110
4,570
10,500
11,100
10,700
1,250
1,010
1,210
138
296
163
26,100
20,100
25,400
454
220
372
1,480
2,470
1,620
3,710
5,250
4,100
6,150
5,550
5,940
4,370
7,010
5,110
11,700
12,7
00
12,000
1,520
1,17
0 1,
460
158
348
190
30,100
23,000
29,200
573
263
458
1,79
0 2,820
1,950
4,060
5,900
4,540
7,030
6,220
6,750
4,710
7,910
5,610
12,900
14,200
13,200
1,790
1,330
1,710
178
400
216
34,000
25,700
32,900
703
307
553
- A
ffecte
d
by
up
stre
am
rese
rvoir
-
Table
1. T-year peak discharges at
ga
ging
stations Continued
Ui
Map
N
o.
360
361
362
36
3
36
4
36
5
366
36
7
36
8
369
370
Sta
tion
No.
05
59
23
00
05
59
25
00
05
59
27
00
05592800
05
59
30
00
05
59
35
20
05
59
35
75
05
59
36
00
05
59
37
00
05
59
39
00
05
59
40
00
Sta
tion
nam
e an
d lo
cati
on
Wo
lf
Cre
ek
near
Beech
er
Cit
y,
111.
Lat
39°0
9'3
0",
lo
ng
88°4
8'2
0",
in
NE
1/4N
E1/
4 se
c.
12,
T.8
N
. ,
R. 3
E
. ,
Fayett
e
County
.
Kask
ask
ia
Riv
er
at
Vandali
a,
111.
Lat
38°5
7'3
5",
lo
ng
89°0
5'2
0",
in
SE
1/4
sec.
16,
T.6
N
. ,
R.
1 E
.,
Fayett
e
County
.
Hurr
icane
Cre
ek tr
ibu
tary
near
Wit
t,
111.
Lat
39°1
3'0
0",
lo
ng
89«15'1
5",
in
S
E1/
4 sec.
13,
T.9
N
.,
R.2
W
. ,
Montg
om
ery
County
.
Hu
rric
an
e
Cre
ek near
Mulb
err
y
Gro
ve,
1
11
. L
at
3805
5'2
1",
long
89°1
4'1
4",
in
NW
y4S
El/
4 se
c. 31,
T.6
N
.,
R.1
W
.,
Fayett
e
County
.
Kask
ask
ia
Riv
er
at
Carl
yle
, 111.
Lat
38
e36
'42
",
long
89°2
1'2
2",
in
SE
1/4
sec.
18,
T.2
N
.,
R.2
W
. ,
Cli
nto
n
County
.
Cro
oked
C
reek
near
Hoff
man
, 111.
Lat
38°
30 '2
5",
long
89"
16' 2
4",
in
N
El/
qNE
l/4
sec. 2
6,
T.1
N
. ,
R.2
W
. ,
Was
hin
gto
n
County
.
Lit
tle
Cro
oked
C
reek
near
New
M
ind
en,
111.
Lat
38
°26
'30
",
long
8
9°2
5'0
0",
in
SWV
4NE
1/4
sec.
15,
T.1
S
. ,
R.3
W
., W
ashin
gto
n
County
.
Blu
e
Gra
ss
Cre
ek n
ear
Ray
mon
d,
111.
Lat
39
«M
6'0
7",
lo
ng
89°3
2'0
2",
in
N
E1/
4SE
1/4
sec.
33,
T.1
0
N.
, R
.4
W. ,
M
on
tgo
mer
y
County
.
Blu
e
Gra
ss
Cre
ek tr
ibu
tary
near
Ray
mo
nd
, 111.
Lat
39°1
6'4
6",
lo
ng 89°3
3'2
4",
in
S
El/4
sec.
29
, T
.10
N.,
R.4
W
. ,
Mo
ntg
om
ery
C
ounty
.
East
F
ork
S
hoal
C
reek
n
ear
Coff
een,
111.
Lat
39°0
8'5
6",
lo
ng
89°2
1'0
8",
in
NW
Vfc
SEl/j
se
c. 7
, T
.8
N.,
R.2
W
.,
Mo
ntg
om
ery
C
ounty
.
Sh
oal
Cre
ek
near
Bre
ese
, 111.
Lat
38
°36
'35
",
long
89°2
9'4
0",
in
SW1/
4SW
1/4
sec.
13,
T.2
N
.,
R.4
W
.,
Cli
nto
n
County
.
Q2
3,0
00
1,8
20
2,8
20
12
,90
0
14
,60
0
12
,90
0 72
36
6
5
8,2
40
4,2
90
7,2
90
13
,90
0
18
,30
0
14,1
00
5,0
70
4,8
30
5,0
20
3,7
30
2,5
50
3,5
20
1,0
00
66
2
95
5
147 81
127
2,1
30
1,8
80
2,0
90
9,0
40
1
0,3
00
9
,12
0
65
5,0
10
3,1
10
4
,67
0
22,0
00
23,1
00
22,1
00 98
6
6
92
12,8
00
7,2
40
11
,40
0
24,5
00
29,0
00
24,8
00
8,0
40
7,9
80
8,0
20
6,3
10
4,3
10
5,9
00
1,4
60
1,1
20
1,4
10
21
3
148
191
3,3
10
3,2
00
3,3
00
15
,80
0
16
,90
0
15
,90
0
do
6,4
10
4,0
10
5,9
20
29,4
00
28
,80
0
29,4
00
114
87
109
15,7
00
9,2
90
13,9
00
32,5
00
36
,00
0
32,8
00
9,8
90
10,1
00
9,9
30
8,0
90
5,5
10
7,5
00
1,7
40
1,4
30
1,6
90
25
8
197
23
5
4,1
40
4,1
00
4,1
30
20,9
00
21,4
00
20,9
00
Q25
8,1
80
5,1
50
7,5
00
40
,60
0
35,8
00
40,0
00
132
115
129
19
,20
0
11
,90
0
17
,00
0
43,3
00
44,8
00
43,4
00
12
,00
0
12
,90
0
12
,30
0
10
,40
0
7,0
50
9,5
10
2,0
60
1,8
20
2,0
20
313
26
2
29
3
5,2
10
5,2
60
5,2
20
27,7
00
27,1
00
27,7
00
Qso
9,5
10
6,0
10
8,6
90
50,1
00
40,9
00
49,0
00
145
136
143
21,7
00
13,9
00
19,2
00
51,6
00
51,1
00
51,5
00
13,5
00
14
,90
0
13
,90
0
12,0
00
8,2
00
11,0
00
2,2
90
2,1
10
2,2
50
35
5
311
338
6,0
10
6,1
20
6,0
40
33,1
00
31,3
00
32,9
00
ClO
O
10,8
00
6,8
70
9,8
60
60,8
00
45,9
00
58,7
00
157
157
157
24,0
00
15,9
00
21,4
00
60,3
00
57,3
00
59,8
00
14,9
00
16
,90
0
15,5
00
13
,60
0
9,3
50
12,4
00
2,4
90
2,4
00
2,4
70
396
361
383
6,8
40
6,9
80
6,8
70
38
,60
0
35,5
00
38
,20
0
Table 1. T-year peak discharges at gaging stations Continued
Map
S
tati
on
No.
N
o.
371
05594090
372
*0
55
94
10
0
37
3
05594200
37
4
05594330
375
05594450
376
05
59
48
00
377
05595000
378
05595200
379
05595500
38
0
05
59
55
10
Sta
tion
nam
e an
d lo
cati
on
Sugar
C
reek
at
Alb
ers
, 111.
Lat
38
«3
2I2
9",
lo
ng
89«37'3
6",
in
SW
l/jSW
Vq
sec.
11,
T.1
N
.,
R.5
W
.,
Cli
nto
n
County
.
Kask
ask
ia
Riv
er
near
Ven
edy
sta
tio
n,
11
1.
Lat
38°2
7'0
2",
lo
ng
89°3
7'3
9",
in
N
W1/
4NW
1/4
sec.
14,
T.I
S
. ,
R.5
W
., W
ashin
gto
n
Co
un
ty.
Wil
liam
s C
reek
near
Cord
es,
111.
Lat
38°
19' 4
0",
lo
ng
89°2
8'3
5",
in
N
W^/
4 se
c.
30
,T
.2
S.,
R. 3
W
., W
ashin
gto
n
County
.
Mud
C
reek
near
Mari
ssa,
11
1.
Lat
38°
15 '4
6",
lon
g
89
»4
3'5
6",
in
N
E1/4
NW
1/4
sec.
23,
T.3
S
. ,
R.6
W
., S
t.
Cla
ir
County
.
Sil
ver
Cre
ek
near
Tro
y,
111.
Lat
38°4
3'0
0",
lo
ng
89°4
9'4
5",
in
SE
1/4S
W1/
4 se
c.
12,
T.3
N
. ,
R.7
W
. ,
Mad
iso
n
Co
un
ty.
Sil
ver
Cre
ek
near
Fre
eburg
, 1
11
.L
at
38
°24
'22
",
long
89°5
2'2
6",
in
N
E1/
4NE
1/4
sec.
33
,T
.1
S.,
R.7
W
. ,
St.
C
lair
C
ounty
.
Kask
ask
ia
Riv
er
at
New
A
then
s,
11
1.
Lat
38°
19*45",
lo
ng
89°5
2'4
5",
in
SW
1/4N
E1/
4 se
c. 28,
T.2
S
.,
R.7
W
. ,
St.
C
lair
C
ou
nty
.
Ric
hla
nd
C
reek
n
ear
Hec
ker
, 1
11
.L
at
38
«1
9'2
6",
lo
ng
89°5
8'
15",
in
SW
V4S
El/
4 se
c. 2
7,
pro
jecte
d,
T.2
S
. ,
R.8
W
., S
t.
Cla
ir
County
.
Mar
ys
Riv
er
near
Spart
a,
111.
Lat
38
°06
'29
",
long 89°3
8'5
6",
in
N
E1/
4SE
1/4
sec. 9
,T
.5
S.
, R
.5
W.,
Ran
do
lph
C
ounty
.
Lic
k
Bra
nch
n
ear
Ed
en,
11
1.
Lat
38°0
5'5
5",
lo
ng
89»37'2
2",
in
N
W1/
4 sec.
14,
T.5
S
. ,
R.5
W
. ,
Ran
do
lph
C
ou
nty
.
»2 3,7
20
3,0
10
3,5
20
33
926
23
23
1,8
70
2,7
50
2,0
40
3,8
40
4,2
00
3,8
80
4,5
90
7,7
40
5,0
10
23,0
00
31,3
00
23
,30
0
4,7
10
4,5
80
4,6
90
1,4
50
1,1
70
1,4
10
161
262
180
as 6,5
30
5,0
20
6,0
80 _
59
84
73
56
4
3,2
40
4,7
00
3,6
20
6,8
70
7,0
80
6,9
00
8,3
00
12
,80
08
,95
0
42,1
00
49,4
00
42,6
00
7,8
20
7,8
50
7,8
30
2,8
80
2,0
60
2,7
00
322
48
33
69
a,.
8,5
70
6,4
00
7,8
30
Aff
ecte
d
by
80
062
47
46
4,3
10
6,0
70
4,8
40
8,9
10
9,0
60
8,9
50
10
,80
01
6,2
00
11
,70
0
56,8
00
61,4
00
57,1
00
10,0
00
10
,20
01
0,0
00
4,1
40
2,6
80
3,7
50
46
66
46
526
»2S
11,2
00
8,1
50
10,0
00
Qso
13,2
00
9,4
40
11
,70
0
»,0
0
15
,20
01
0,7
00
13,4
00
upst
ream
re
serv
oir
-
1,0
80
82
29
98
5,8
20
7,8
20
6,5
20
11,4
00
11,6
00
11,5
00
13
,90
020,6
00
15,2
00
77,3
00
76,4
00
77,1
00
12
,80
01
3,2
00
12,9
00
6,1
10
3,4
90
5,2
80
693
86
375
7
1,3
20
973
1,2
00
7,0
80
9,1
60
7,8
30
13,2
00
13,5
00
13
,30
0
16,1
00
23,8
00
17,7
00
93,5
00
87,3
00
92,9
00
14
,90
015,4
00
15,0
00
7,8
30
4,1
10
6,6
10
89
91,0
30
951
1,5
70
1,1
30
1,4
10
8,4
30
10
,50
09
,20
0
14
,90
01
5,5
00
15
,00
0
18,2
00
27
,00
02
0,0
00
11
1,0
00
98,2
00
10
9,0
00
16,9
00
17
,70
01
7,1
00
9,8
20
4,7
30
8,0
50
1,1
40
1,2
00
1,1
60
381
*05595550
Marys River tributary at Chester, 111.
Lat
37°5
5'2
7",
lo
ng 8
9°4
8'2
6M
, in
SE
1/4N
W1/
4 se
c.1
8,
T.7
S
.,
R.6
W
., R
and
olp
h
Co
un
ty.
26
73
84
461
55
66
27
696
Tab
le
1. T
-year
pea
k
dis
charg
es
at
gag
ing st
ati
on
s C
onti
nued
Map
No.
382
383
384
385
Stat
ion
Stat
ion
name and
location
No.
05595800
Sevenmile
Creek
near Mt.
Vern
on,
111.
Lat 38° 19
MO", lo
ng 88
°50'
50",
in NW1/4SW1/4 se
c. 26,
T.
2 S.
, R.3
E. ,
Jefferson
Coun
ty.
05596000
Big Muddy
River
near Be
nton
, 11
1.
Lat 37«59'40", long 88
°58'
30",
in NE1/4NW1/4 se
c. 22,
T.6 S.,
R.2
E.,
Franklin Co
unty
.
05596100
Andy Cr
eek
trib
utar
y at
Va
lier
, 11
1.
Lat 38°01'15", long 89
°02'
40",
in NW
1/4N
E1/4
se
c. 12,
T.6 S.
, R. 1
E.,
Franklin Co
unty
.
05597000
Big Mu
ddy
Rive
r at Pl
umfi
eld,
11
1.
Lat 37°54'05", lo
ng 89°00'50", in
NWl/4
sec.
20,
T.7
S. ,
R.2
E.,
Franklin Co
unty
.
Q2 1,030
1,410
1,070
7,460
6,300
7,350
254
223
247
7,710
8,360
7,730
* 1,560
2,260
1,670
14,200
9,350
13,300
455
378
436
12,800
12,300
12,800
2io
1,930
2,850
2,090
19,800
11,300
17,900
604
488
571
16,300
14,900
16,200
225
2,400
3,600
2,630
28,200
13,700
24,500
802
628
750
20,400
17,900
20,300
«50
2,750
4,160
3,030
35,500
15,400
29,900
955
735
887
23,400
20,200
23,200
«,
3,110
4,710
3,440
43,600
17,100
35,600
1,110
841
1,030
26,300
22,300
26,000
385
*055
9700
0 B
ig
Mud
dy
Riv
er at
Plu
mfi
eld
, 111.
4,9
00
7
,32
0
8,9
30
10,9
00
12,4
00
13
,90
0L
at
37
»5
4'0
5",
lo
ng
89»00'5
0",
in
N
W1/
4 se
c.2
0,
T.7
S
. ,
R.2
E
.,
Fra
nk
lin
C
ou
nty
.
386
*055
9745
0 C
rab
Orc
har
d
Cre
ek tr
ibu
tary
near
Pit
tsb
urg
, 111.
221
285
327
379
419
458
Lat
37°4
6'1
8",
lo
ng
8
8°4
7'5
2",
in
SW
1/4N
W1/
4 se
c.5
,
T.9
S
.,
R.4
E
. ,
Wil
liam
son
Co
un
ty.
387
0559
7500
C
rab O
rchar
d
Cre
ek
near
Mar
ion,
111.
1,5
40
2,5
20
3,1
80
4
,00
0
4,5
90
5
,18
0L
at
37
«4
3'5
2",
lo
ng
88°5
3'2
1",
in
SW
V4S
Wl/4
Sec.1
6,
1,5
70
2,4
90
3,1
10
3,8
90
4
,47
0
5,0
40
T.9
S
.,
R.3
E
.,
Wil
liam
son
County
. 1,5
50
2,5
20
3,1
70
3
,98
0
4,5
80
5
,15
0
388
0559
9000
B
eauco
up
Cre
ek
near
Mat
thew
s,
11
1.
4,7
20
8,9
70
12,5
00
17,7
00
22
,10
0
27
,00
0L
at
37
»5
8'0
0",
lo
ng
89°2
1'0
0",
in
SW
1/4 se
c.2
9,
5,3
00
8
,04
0
9,7
90
12,0
00
13
,60
0
15
,10
0T
.6 S
.,
R.2
W
., P
err
y
Co
un
ty.
4,7
60
8
,87
0
12,1
00
16,7
00
20
,50
0
24
,60
0
389
0559
9500
B
ig
Mud
dy
Riv
er at
Murp
hysb
oro
, 111.
12
,80
0
20,5
00
25,5
00
31
,40
0
35
,60
0
39
,50
0L
at
37°4
4'5
5",
lo
ng
89°2
0f4
5",
in
SE
1/J
sec.8
, 16,2
00
23,6
00
28,2
00
34
,00
0
38
,00
0
42
,00
0T
.9 S
.,
R.2
W
., Ja
ckso
n
County
. 1
2,9
00
20,7
00
25,6
00
31
,60
0
35
,80
0
39
,70
0
389
*055
9950
0 B
ig M
uddy
R
iver
at
Mu
rph
ysb
oro
, 1
11
. 13,5
00
20,5
00
25,2
00
31,0
00
35
,20
0
39
,20
0L
at
37°4
4'5
5",
lo
ng
89°2
0'4
5",
in
SE
1/4
sec.8
,
T.9
S
.,
R.2
W
., Ja
ckso
n
Co
un
ty.
390
0559
9560
C
lay
L
ick
Cre
ek
near
Mak
anda
, 111.
736
1,3
00
1,7
70
2,4
60
3,0
50
3,7
20
Lat
37
°36
'00
",
lon
g
89
°14
'25
",
in
SW1/
4 se
c.3
2,
465
798
1,0
40
1,3
50
1,5
90
1,8
30
T.1
0
S.,
R
.1
W.,
Jack
son
C
ounty
. 67
1 1,1
30
1,4
80
1,9
90
2,4
20
2,8
80
Tabl
e 1. T-year peak discharges at
gaging stations Continued
Map
Stat
ion
No.
No.
391
*05599580
392
05599640
393
05599800
394
05600000
Stat
ion
name and
location
Big Muddy Ri
ver
tributary
near
Go
rham
, 111.
Lat
37»4
0'21
", long 89
*28 '49",
in NW1/4NE1/4 sec. 7,
T.10 S. ,
R.
3 W.
, Ja
ckso
n Co
unty
.
Green
Creek
tributary
near
Jonesboro, 111.
Lat 37
°27'
55",
lo
ng 89
°18'
40",
in
NE
1/4N
E1/4
sec. 22,
T.12 S. ,
R.2
W.,
Union
Coun
ty.
Orchard Creek
near
Fa
yvil
le,
111.
Lat
37°11'35", lo
ng 89°24'35", in SE
1/4S
W1/4
sec. 23,
T.15 S. ,
R.
3 W.
, Al
exan
der
Coun
ty.
Big Creek
near
We
taug
, 11
1.La
t 37»19'00", lo
ng 89
°07'
55",
in SW1/4
sec.
5,
T.14 S.
R.
1 E.,
Pula
ski
Coun
ty.
Q2
38
266
199
254 61 74 65
2,170
1,870
2,15
0
Cs
65
418
351
405
100
133
112
2,950
2,990
2,960
010 86
516
461
506
129
177
147
3,500
3,760
3,540
Q25 11
4
638
610
632
167
237
194
4,230
4,740
4,320
Qso 13
7
724
723
724
199
282
231
4,810
5,470
4,920
QIOO 16
1
809
839
815
232
330
269
5,410
6,180
5,550
Table 2. Selected basin
char
acte
rist
ics,
years
of re
cord
, eq
uiva
lent
years
of re
cord
, an
d maximum fl
ood
for
nonregulated rural
gaging stations
[A,
drai
nage
ar
ea;
S, slope; I, rainfall in
tens
ity,
RI,
recurrence in
terv
al;
mi2
, square miles; ft
/mi,
feet per
mile
;in
., in
ches
; ft
3/s,
cu
bic
feet per se
cond
; yrs, years; equivalent ye
ars
of record is
associated with the
regr
essi
on estimating eq
uati
ons.
Footnotes
are
at en
d of
ta
ble.
]
cr> U)
Map
Station
No.
No.
1 03336100
2 03336500
3 03336900
5 03337500
6 03338000
7 03338100
8 03338500
9 03338800
10
03339000
11
03341700
12
03341900
13
03343400
14
03344000
15
03344250
16
03344425
17
03344500
18
03345500
19
03346000
20
03378000
21
03378635
22
03378650
23
03378900
24
03378980
25
03379500
26
03379650
27
03380300
28
03380350
29
03380400
30
03380450
31
03380475
Years
of
record
25 33 27 39 37 22 19 21 63 15 25
25 21 25 18 35
74 45
45 19 17 20 22 71 21 25 18 12 25
25
A
(mi2
)
1.05
35.0
134 68.0
340 2.20
958 1.
311,290 1.
08 .04
186
919.08
.07
7.61
1,516
318
228
240 1.
62745.43
1,13
1 1.62 .08
208 1.
13 .43
97.2
S (f
t/mi
)
21.01
6.92
5.49
2.59
3.01
15.81
3.12
33.21
3.22
44.35
52.80
2.96
1.53
10.5
197.15
15.73
1.58
4.33
2.85
5.34
19.59
2.66
73.61
2.01
36.06
98.74
2.78
36.06
87.65
4.07
I (i
n.)
2.9
3.0
3.0
3.0
3.0
3.0
3.0
3.0
3.0
3.1
3.2
3.1
3.1
3.2
3.2
3.2
3.2
3.2
3.3
3.2
3.3
3.3
3.2
3.3
3.3
3.4
3.3
3.4
3.4
3.4
Regi
on I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I
2Recurrence in
terv
al,
in
5 10
25
50
Equivalent
3.7
3.3
3.1
2.9
2.9
3.6
2.9
3.9
2.9
4.1
4.4
3.0
2.7
3.3
4.7
3.7
2.8
3.2
3.0
3.3
3.9
3.1
4.7
2.9
4.2
5.0
3.1
4.4
4.9
3.3
4.1
4.2
4.9
3.3
3.5
3.6
4.2
6.0
3.7
6.7
5.0
3.1
3.9
4.7
6.8
5.8
3.8
3.8
4.7
4.5
5.9
3.8
5.2
4.1
7.0
6.5
3.9
6.2
6.1
4.5
4.6
5.0
6.1
3.9
4.2
4.1
5.1
7.0
4.4
8.0
5.6
3.6
4.8
5.5
7.6
6.9
4.5
4.5
5.8
5.4
7.0
4.4
5.7
4.9
8.3
7.2
4.6
7.1
6.7
5.3
years
5.3
5.8
7.2
4.6
4.9
4.8
6.0
8.0
5.2
9.0
6.2
4.2
5.7
6.3
8.3
7.9
5.4
5.2
6.9
6.2
7.9
5.2
6.4
5.8
9.3
7.8
5.3
7.8
7.3
6.2
years
100
Maximum flood
500
of record
5.7
6.2
7.7
5.0
5.3
5.1
6.5
8.3
5.6
9.3
6.5
4.6
6.2
6.6
8.6
8.4
5.8
5.6
7.4
6.7
8.3
5.6
6.7
6.2
9.6
8.0
5.7
8.1
7.6
6.6
5.9
6.5
8.0
5.3
5.6
5.4
6.9
8.5
6.0
9.5
6.7
4.9
6.6
6.9
8.7
8.6
6.2
5.9
7.7
7.0
8.5
5.9
6.9
6.6
9.8
8.1
6.0
8.3
7.7
6.9
6.2
6.8
8.3
5.6
6.0
5.7
7.2
8.6
6.3
9.4
6.8
5.2
7.0
7.0
8.6
8.6
6.5
6.2
7.9
7.2
8.5
6.2
7.0
6.9
9.6
8.1
6.3
8.3
7.7
7.1
Year
1959
1968
1968
1964
1964
1980
1943
1974
1939
1961
1974
1979
1985
1974
1974
1961
1950
1950
1961
1970
1970
1968
1971
1950
1961
1961
1968
1968
1975
1961
Dis
charge
(ft3/*) 249
5,160
6,860
4,080
10,100
640
36,000
1,600
48,700
511 48
6,240
20,400 68
112
3,500
44,800
27,100
7,500
10,300
930
24,000
409
47,000
1,550
152
19,000
570
323
17,100
RI
(yrs
)
15 8045
>100 60 25
>100
>100
>100 20
20
20
25
50
25
60
45
8080 20
100
20 20 45
>100
9090 15 20
>100
Tabl
e 2. Selected basin
char
acte
rist
ics,
years
of re
cord
, equivalent ye
ars
of re
cord
,an
d maximum
Map
Stat
ion
No.
No.
32
03380500
33
03381500
34
03381600
35
03382025
36
03382100
37
03382170
39
03382510
40
03382520
41
03384450
42
03385000
43
03385500
45
03612000
46
03612200
47
03614000
48
04087300
49
04087400
50
05414820
51
05415 (T
OO
52
05415500
53
05418750
54
05418800
55
05419000
56
05420000
57
05430500
58
05431500
59
05434500
60
05435000
61
05435500
62
05435650
63
05436500
64
05436900
65
05437000
66
05437500
67
05437600
68
05437950
Years
of
record
68
46 17 22 20 14 16 13 18 36 26
63 21 14 17 15 18
_ 45
30 20 20 51 37
69
42
45 25 72 16 70 20 32 56 16 14
A
(mi2)
464
3,102.1
6.5
2147 13.3
8.51
1.10
42.9
19.1 1.05
244.27
1.95
1.5
5.04
39.6
125 20.1 1.93 .86
247
230
3,340
202
1,034 1.
311,326 1.
95523
.55
2,550
6,363 2.
2114
.4
S (f
t/mi
)
1.90
1.16
89.76
75.50
4.26
12.16
25.49
28.25
16.23
21.44
145.20
2.69
140.98
23.87
34.32
21.67
18.9
111.32
37.30
35.20
157.87
10.93
6.55
0.74
2.68
2.27
40.90
1.61
29.36
3.18
97.11
0.92
0.84
40.26
7.38
flood for nonregulated rural gaging stations Continued
I (i
n.)
3.4
3.3
3.3
3.5
3.5
3.4
3.4
3.4
3.5
3.5
3.5
3.5
3.5
3.6
2.7
2.6
3.0
~3TT
T3.0
3.0
3.0
3.0
3.0
2.8
2.8
2.9
3.0
3.0
3.0
2.9
2.9
2.9
2.7
2.8
2.7
Regi
on I I IIV
IV
IV
IV
IVIVIV
IV
IVIV
IV I I I I I I I I I I I I I I I I I I I I I
2Recurrence in
terv
al,
in
5 10
25
50
Equivalent
3.0
2.7
4.7
4.6
3.2
3.5
4.0
4.0
3.7
3.8
5.0
3.0
4.9
4.0
3.1
2.4
3.6
J.T
3.8
4.1
4.7
3.3
3.2
2.2
2.6
2.7
4.1
2.6
3.9
2.8
4.2
2.4
2.0
3.7
2.7
4.0
4.2
7.1
6.6
4.2
5.9
4.5
5.6
5.9
6.0
5.8
3.7
7.2
6.1
5.1
3.8
5.5
6.4
6.1
4.5
5.9
4.8
4.4
2.6
3.4
3.7
4.8
4.0
5.3
3.7
6.3
2.9
2.4
3.9
3.0
4.8
5.3
8.1
7.5
4.9
7.2
5.0
6.5
7.0
7.0
6.3
4.4
8.1
7.1
6.2
4.8
6.6
year
s
5.6
6.3
8.9
8.1
5.6
8.2
5.6
7.2
7.9
7.9
6.8
5.0
8.7
7.9
7.3
5.7
7.6
8.4
tO.O
7.3
5.1
6.6
5.7
5.2
3.1
4.1
4.6
5.4
4.9
6.1
4.4
7.3
3.5
3.0
4.4
3.6
8.3
5.8
7.2
6.6
6.1
3.8
4.9
5.5
6.1
5.9
6.9
5.2
8.1
4.2
3.6
5.0
4.2
years
100
Maximum fl
ood
500
of re
cord
6.1
6.9
9.1
8.3
5.9
8.7
5.9
7.5
8.3
8.2
7.0
5.4
8.9
8.2
7.8
6.2
8.1
10.7
8.7
6.1
7.5
7.1
6.6
4.2
5.4
6.0
6.4
6.5
7.3
5.7
8.4
4.6
4.0
5.4
4.6
6.4
7.3
9.2
8.4
6.2
8.9
6.1
7.7
8.5
8.4
7.1
5.6
8.9
8.4
8.0
6.5
8.3
11.18.9
6.4
7.6
7.4
6.9
4.5
5.7
6.3
6.6
6.8
7.5
6.0
8.6
5.0
4.3
5.6
4.8
6.7
7.6
9.0
8.3
6.4
8.9
6.2
7.7
8.5
8.4
7.1
5.9
8.7
8.4
8.2
6.9
8.4
11.1 8.9
6.6
7.6
7.6
7.1
5.0
6.1
6.7
6.8
7.2
7.7
6.3
8.5
5.4
4.7
5.9
5.2
Year
1961
1961
1974
1969
1982
1977
1973
1969
1985
1985
1958
1935
1967
1966
1969
1969
1969
t96T
1947
1974
1965
1946
1946
1929
1973
1969
1974
1929
1974
1915
1969
1959
1916
1974
1972
Dis
charge
(ft3/s
)
51,000
46,900
484
563
5,160
2,590
668
695
16,100
9,450
1,500
9,630
392
754
355
937
11,600
29,700
16,600
520
862
12,000
11,600
13,000
16,500
15,100
698
18,400
660
14,800
187
16,600
32,500
308
192
RI
(yrs)
>100 100
>100 70 10 60 350
>100
>100 30 20 25 15 50
>100 60
>100
>100 15 40 25 40 30
>100 25 25 45 45 60 15 15 456 5
Table
2. Selected ba
sin
characteristics, years
of re
cord
, eq
uiva
lent
ye
ars
of re
cord
,and maximum
Map
Stat
ion
No.
No.
69
05438250
70
05438300
71
05438390
72
05438500
73
05438850
74
05439000
75
05439500
76
05439550
77
05440000
78
05440500
79
05440650
80
05440900
81
05441000
82
05441500
83
05442000
84
05443500
85
05444000
86
05444100
87
05446000
88
05446500
89
05446950
90
05447000
91
05447050
93
05447350
94
05447500
95
05448000
96
05448050
97
05466000
98
05466500
99
05467000
100
05467500
101
05468000
102
05468500
103
05469000
104
05469500
Years
of
record
24 20 10 46 25 14 46 18 46 41 18 23 43 10 12 70 46 14 40 46 16 42 14 16 50 46
25 45 51 51 41 11 44 51 42
A
(mi*)
85.1 .8
488.1
538 1.
67
77.7
387 1.
711,099
117 1.
00 .15
103
8,205
116
8,753
146 1.
42164
9,549
.53
201 4.95
1.22
1,003 62.4 .2
215
5445
174
151 67.1
130
432 82.9
S (f
t/mi
)
5.72
87.34
8.27
4.59
28.72
2.65
2.27
53.75
4.07
6.34
33.16
144.14
10.45
0.95
5.17
1.00
4.28
60.19
3.48
1.11
86.23
3.85
20.91
32.52
2.53
7.44
67.06
5.07
2.69
3.59
4.22
5.02
4.49
3.96
6.12
flood fo
r nonregulated rural gaging stations Continued
I (in.)
2.8
2.8
2.8
2.8
2.9
2.9
2.8
2.8
2.8
2.9
2.9
3.0
2.9
2.8
2.9
2.8
3.0
3.0
3.0
2.9
3.0
2.9
3.0
3.1
3.0
3.2
3.2
3.2
3.2
3.2
3.2
3.2
3.2
3.2
3.2
Region
I I I I I I I I I I I I I I I I I I I I I I I I I I IIII
III
III
III
III
III
III
III
2Recurrence interval, in
5
10
25
50
Equivalent
2.9
4.0
2.9
2.7
3.8
2.6
2.5
3.8
2.7
3.1
3.8
4.5
3.3
2.2
3.0
2.2
3. 1
4.3
2.9
2.4
4.3
2.9
3.7
3.9
2.8
3.5
4.5
3.2
3.0
3.1
2.9
3.3
3.2
3.0
3.1
3.0
5.1
4.4
3.4
4.6
4.6
2.5
4.6
3.0
3.0
5.1
7.4
3.6
3.1
4.3
2.4
3.3
5.1
4.6
2.8
6.8
2.9
5.5
6.8
3.0
4.0
6.7
3.3
3.6
4.2
5.7
3.6
4.3
5.3
6.1
3.5
5.8
5.3
4.0
5.3
5.8
3.0
5.3
3.5
3.5
5.9
8.6
4.2
3.9
5.2
2.8
3.9
5.7
5.7
3.3
7.9
3.4
6.5
8.3
3.5
4.7
7.7
3.8
4.2
5.0
7.5
4.1
5.0
6.7
8.0
years
4.1
6.4
6.3
4.8
6.1
7.1
3.6
6.0
4.1
4.2
6.7
9.4
4.9
4.8
6.2
3.4
4.6
6.4
6.8
4.0
8.8
4.1
7.4
9.4
4.1
5.4
8.4
4.4
5.0
5.9
9.0
4.8
5.8
8.0
9.6
years
100
Maximum flood
500
of record
4.5
6.8
6.8
5.2
6.4
7.7
4.0
6.4
4.5
4.5
7.1
9.7
5.3
5.3
6.7
3.7
4.9
6.7
7.4
4.4
9.1
4.4
7.8
9.9
4.5
5.8
8.7
4.7
5.4
6.3
9.7
5.1
6.3
8.6
10.3
4.8
7.0
7.1
5.5
6.7
8.2
4.2
6.6
4.8
4.8
7.3
9.7
5.5
5.6
7.0
4.0
5.2
6.9
7.7
4.7
9.2
4.7
8.0
10.0
4.8
6.0
8.8
5.0
5.6
6.6
10.1 5.4
6.6
8.9
10.6
5.1
7.1
7.4
5.8
6.9
8.5
4.6
6.8
5.1
5.1
7.4
9.5
5.8
6.1
7.3
4.4
5.6
7.1
8.0
5.1
9.1
5.0
8.2
19.9
5.1
6.3
8.8
5.3
6.0
6.9
10.2
5.7
6.8
9.1
10.7
Year
1978
1972
1973
1943
1959
1983
1973
1971
1979
1955
1971
1958
1972
1946
1951
1973
1974
1965
1946
1948
1967
1981
1969
1967
1974
1973
1980
1951
1973
1973
1982
1950
1982
1982
1982
Dis
charge
(ft3/
s)
5,090
180
4,000
10,300 393
3,500
8,460
452
16,7
006,100
297
212
7,950
45,500
2,630
59,700
6,770
832
5,770
46,200
493
7,600
431
890
12,100
9,300
168
8,910
18,0
008,900
23,400
1,74
012,600
34,600
10,500
RI
(yrs
)
>1008
25 20 25
>100 25 25 15 15 30 25 15 15 10
>100 35 30 100 20 30
>100 10
>100 35 40 20
>100
>100
>100
>100 690
>100
>100
Tabl
e 2. Selected basin ch
arac
teri
stic
s, years
of re
cord
, eq
uiva
lent
years
of re
cord
.
cn
en
and maximum
Map
No.
105
106
107
108
109
110
111
112
113
114
115
116
117
1 18
119
120
121
122
123
124
125
126
127
128
129
130
132
134
139
144
189
190
213
225
226
Years
Stat
ion
of
A No.
record
(mi2
)
05469750
05495200
05495500
05496900
05501500
05502020
05502040
05502120
05512500
05513000
05513200
05518000
05519500
05520000
05520500
05524500
05525000
05525050
05525500
05526000
05526150
05526500
05527050
05527500
05527800
05527840
05527900
05528000
05528360
05529000
05536178
05536190
05537500
05540110
05540140
25 24 42
21 15 30 45
25 46
46 24 62 23
33 71 36 41--T7
37 62 25 26 17 71 25 15 15 39 16 45 12 42 35 19 19
.26
1.45
349.50
.32
40.9
72.7 .78
39.4
161 1.
201,578 54.7
220
2,093
449
686
10.2
446
2,091
.19
12.1 .8
05,150
123
145
21.4
232 2.85
360 34.8
70.7
20.94.27
2.47
S (ft/mi)
28.78
34.48
3.70
105.60
66.53
19.75
15.00
78.67
11.25
7.02
122.50
0.90
2.30
2.60
0.90
2.00
1.11
8.34
4.86
0.69
56.50
11.93
29.67
1.27
1.76
1.42
1.80
1.27
11.34
1.11
5.86
7.40
7.81
11.18
25.99
flood fo
r nonregulated rural gaging stations Continued
I (i
n.)
3.2
3.3
3.3
3.3
3.4
3.4
3.4
3.4
3.4
3.4
3.5
2.7
2.8
3.0
2.8
2.8
2.9
2v9~
2.9
2.9
2.8
2.9
2.8
2.8
2.7
2.7
2.7
2.7
2.7
2.7
2.8
2.8
2.8
2.8
2.8
Region
III I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I I
II II
2Recurrence interval, in
5 10
25
50years
100
Maximum flood
500
Equivalent years
of re
cord
4.0
4.4
3.2
5.0
4.8
4.1
3.9
4.8
3.8
3.6
4.9
2.1
2.5
2.8
2.2
2.6
2.4
3.t
2.9
2.3
3.8
3.1
3.3
2.3
2.2
2.1
2.2
2.1
2.8
2.1
2.9
3.0
2.9
2.8
3.2
4.5
5.2
3.9
5.5
5.9
4.7
4.3
6.8
4.3
4.0
7.6
2.6
3.0
3.5
2.6
3.5
3.4
4.9
4.0
3.0
5.3
6.1
6.1
3.1
2.5
2.2
3.0
2.7
3.8
2.3
3.1
3.9
4.6
4.4
3.9
5.1
5.8
4.5
6.0
6.5
5.3
4.8
7.7
4.9
4.6
8.6
3.1
3.6
4.1
3.1
4.3
4.1
6.0
4.8
3.6
6.2
8.0
7.6
3.8
2.9
2.6
3.7
3.2
4.6
2.8
3.6
4.7
5.7
5.4
4.5
5.7
6.5
5.3
6.6
7.2
6.0
5.5
8.4
5.6
5.3
9.3
3.8
4.2
4.8
3.8
5.1
5.0
7.1
5.6
4.4
7.1
9.6
8.9
4.6
3.5
3.1
4.5
3.9
5.4
3.3
4.3
5.5
6.7
6.4
5.1
6.0
6.8
5.7
6.9
7.4
6.3
5.9
8.7
5.9
5.7
9.5
4.2
4.6
5.3
4.2
5.6
5.4
7.6
6.1
4.8
7.4
10.2
9.4
5.0
3.9
3.5
5.0
4.3
5.8
3.7
4.7
5.9
7.2
6.8
5.4
6.3
7.0
5.9
7.1
7.6
6.5
6.1
8.8
6.2
6.0
9.5
4.5
4.9
5.6
4.5
5.9
5.8
7.9
6.4
5.2
7.6
10.6
9.7
5.4
4.2
3.7
5.3
4.6
6.1
4.0
4.9
6.2
7.6
7.1
5.7
6.4
7.2
6.3
7.1
7.6
6.7
6.3
8.7
6.4
6.2
9.3
4.9
5.3
5.9
4.9
6.3
6.2
8.1
6.7
5.6
7.7
10.7
9.8
5.8
4.5
4.0
5.7
5.1
6.4
4.3
5.3
6.6
7.9
7.4
5.9
Year
1958
1958
1985
1960
1962
1979
1944
1966
1965
1946
1960
1982
1955
1976
1979
1958
1958
1957
1951
1913
1957
1970
1957
1957
1979
1976
1960
1960
1972
1938
1955
1959
1955
1964
1972
Dis
charge
(ft3/s
)
182
1,11
029,500
616
796
9,000
15,000
1,33
012,600
23,500
1,280
7,650
1,840
3,610
16,000
5,930
10,400
1,950
22,900
34,000
233
1,71
078
675,900
2,120
2,170
510
3,070
390
5,000
2,480
2,670
3,160
214
204
RI
(yrs)
60 20 90 10 70 20 20 60 20 70 35
>100 25
>100
>100 60
>100
>100 70
>100
45
>100
>100
>100 20 15 45 45
60
70 50 25
>100 25
35
Table 2. Selected basin characteristics/ years of re
cord
, equivalent years of record,
and maximum
Map
No.
232
233
235
236
239
241
243
245
248
249
250
251
252
254
255
256
257
258
259
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
Station
No.
05541750
05542000
05546500
05548150
05549700
05549900
05550300
05550450
05551030
05551050
05551060
05551200
05551520
05551620
05551650
05551700
05551800
05551900
05551930
05554000
05554500
05554600
05555000
05555300
05555400
05555775
05556500
05557000
05557100
05557500
05558000
05558050
05558075
05558500
05559000
Years
of
record
22 4644 22 15 23 17 17 17 18 18 24 19 17 16 25 19 15 16 43
43 18 15 55 21 14 49 48 22 49 11 21 24 33 34
A
(mi2
)
4.52
455
868 13.6
10.8 .0
738.9
16.7
14.07.35
11.5
51.7 5.21
21.6
2.11
70.2 .45
32.6
21.1
186
579.16
1,084
1,251.14
.36
196 86.7 .33
99
485.03
.22
56.2
5.66
S (f
t/mi
)
6.55
4.33
1.11
12.80
8.28
115.10
9.36
11.93
10.91
9.36
10.6
113.31
11.96
12.04
28.83
5.60
87.12
8.79
10.04
5.39
1.11
60.72
1.27
1.37
50.37
24.55
6.07
9.03
97.15
12.72
6.28
228.62
139.39
10.24
53.86
flood for nonregulated rural gaging stations Continued
I (i
n.)
2.9
2.9
2.7
2.8
2.7
2.8
2.8
2.8
2.8
2.8
2.8
2.8
2.8
2.8
2.8
2.8
2.9
2.8
2.8
2.9
3.0
3.0
3.0
3.0
3.0
2.9
3.0
3.0
3.0
3.0
3.0
3.0
3.0
3.0
3.1
Region
I III II II II II II II II II II II II II II II II III I I I I I I I I I I I I I I I
2Recurrence interval, in
5
10
25
50years
100
Maximum flood
500
Equivalent years of
record
3.1
2.9
1.9
2.9
2.5
3.9
2.8
2.9
2.9
2.7
2.7
2.9
2.9
2.9
3.2
2.6
3.9
2.8
2.9
3.0
2.5
4.3
2.6
2.6
4.0
3.7
3.2
3.3
4.5
3.5
3.2
5.0
4.4
3.3
4.3
3.1
2.9
2.8
3.4
3.6
4.5
3.3
3.9
3.5
4.8
4.9
3.0
3.8
3.7
5.1
2.9
5.1
3.9
3.6
3.3
3.1
4.7
3.1
3.1
6.5
4.6
3.1
4.6
6.2
4.1
4.0
6.1
7.7
5.2
4.7
3.6
3.3
3.5
3.9
4.4
5.0
3.9
4.6
4.1
6.1
6.3
3.4
4.5
4.4
6.1
3.4
5.7
4.7
4.2
3.8
3.8
5.2
3.7
3.7
7.8
5.4
3.6
5.5
7.1
4.8
4.7
6.8
9.1
6.4
5.3
4.3
4.0
4.3
4.5
5.2
5.6
4.5
5.3
4.7
7.3
7.5
4.0
5.2
5.0
7.1
3.9
6.3
5.4
4.8
4.5
4.5
5.8
4.4
4.4
8.8
6.1
4.3
6.3
7.8
5.5
5.5
7.3
10.1
7.5
5.9
4.6
4.3
4.8
4.9
5.6
5.9
4.8
5.7
5.1
7.9
8.1
4.3
5.5
5.4
7.5
4.2
6.6
5.9
5.2
4.9
4.9
6.2
4.9
4.9
9.1
6.5
4.6
6.8
8.1
5.9
5.9
7.6
10.4
7.9
6.3
4.9
4.6
5.1
5.1
5.9
6.0
5.1
6.0
5.3
8.2
8.4
4.5
5.8
5.6
7.7
4.5
6.8
6.1
5.4
5.2
5.2
6.4
5.2
5.2
9.3
6.7
4.9
7.1
8.2
6.2
6.2
7.7
10.4
8.2
6.5
5.2
4.9
5.5
5.4
6.2
6.2
5.3
6.2
5.5
8.5
8.7
4.7
6.0
5.9
7.9
4.7
6.9
6.4
5.7
5.5
5.6
6.6
5.6
5.6
9.2
6.9
5.2
7.3
8.2
6.4
6.5
7.7
10.2
8.4
6.6
Year
1979
1983
1960
1983
1960
1972
1973
1967
1967
1957
1967
1971
1978
1974
1970
1983
1978
1974
1974
1970
1983
1965
1920
1958
1958
1960
1974
1974
1973
1974
1951
1958
1958
1970
1974
Dis
charge
(ftVs)
173
22,400
7,520
328
378 59
488
410
687
890
954
1,97
0402
640
346
2,060
320
1,580
694
4,550
13,100
163
17,100
33,500
176
98
12,500
20,100
261
7,500
18,000
122
372
6,930
1,94
0
RI
(yrs
) 750
MOO 15 40
407 15 25
>100
>-\oo 15 50 10 45
60 25 60 25 10 35 35 20 45 30 15 40
>100 15 30 25 80 80 80 20
Tabl
e 2. Selected basin
char
acte
rist
ics/
years
of re
cord
, equivalent ye
ars
of re
cord
,
00
and maximum
Map
Stat
ion
No.
No.
277
05559500
280
05561000
283
05563000
284
05563100
285
05563500
286
05564400
287
05564500
288
05565000
289
05566000
290
05566500
291
05567000
292
05567500
293
05567800
294
05568000
297
05568800
298
05568850
299
05569500
300
05569825
301
05570000
304
05570370
306
05571000
307
05572000
308
05572100
309
05572450
310
05572500
311
05574000
312
05574500
313
05575500
314
05575800
316
05576500
317
05577500
318
05577700
319
105578500
320
05579500
321
05579750
Years
of
record
37 27 40 20 43 25 25 20 23 33 36 41 12 63 26 16 43 25 69 14 31 76
21 16 27 32 33 63 18 72 38 24 39 38 18
A
(mi2
)
115 11.2
119.07
297 49 53.1 9.81
6.30
30.5
93.9
767.9
81,089 62.7
1.00
1,072 4.06
1,636 41.2
362
550.10
111
774 11.0
276
562 52.2
2,168
107 1.
50335
214 3.06
S (ft/mi)
6.07
39.86
10.93
76.03
7.50
5.25
4.91
11.88
11.14
4.54
4.22
2.27
30.99
2.48
6.44
37.86
2.27
24.39
1.98
9.95
3.59
2.75
34.11
5.03
2.21
18.8
02.
012.
015.59
1.48
5.39
40.13
2.59
4.65
21.75
flood for
nonregulated rural gaging stations Continued
I (in.)
3.0
3.2
3.2
3.2
3.2
3.1
3.0
3.0
3.0
3.0
3.0
3.0
3.2
3.1
3.1
3.2
3.2
3.2
3.2
3.2
3.0
3.0
3.1
3.1
3.1
3.3
3.2
3.3
3.3
3.2
3.3
3.3
3.1
3.2
3.1
Regi
on
III
III I I I
III
III
III
III
III
III
III
III
III
III
III
III
III
III
III
III
III
III
III
III
III
III
III
III
III
III
III
III
III
III
2Recurrence
5 10
Equivalent
3.1
4.1
3.6
4.6
3.1
3.2
3.0
3.4
3.2
2.8
3.0
2.6
4.1
2.6
3.1
4.2
2.7
3.8
2.8
3.6
2.9
2.8
4.0
3.1
2.7
3.6
2.9
2.9
3.4
2.7
3.4
4.3
2.8
2.9
3.7
4.3
5.2
5.0
6.5
6.4
4.3
4.9
3.7
6.0
5.6
4.2
4.7
5.0
5.3
5.4
5.4
5.1
6.6
3.9
4.0
3.9
3.6
4.5
5.0
4.4
7.1
3.3
4.2
3.6
2.9
4.2
5.2
4.3
6.0
6.1
5.1
5.9
5.8
7.3
8.4
5.2
6.1
4.2
7.7
7.3
5.1
6.0
5.6
7.1
6.7
6.1
6.7
8.1
4.6
4.5
4.7
4.3
5.1
6.3
5.6
8.9
3.9
5.0
4.1
3.4
4.9
5.9
5.3
7.9
7.3
interval, in
25
50
years
5.9
6.6
6.7
8.1
10.1
6.0
7.2
4.8
9.2
8.9
6.0
7.4
6.3
8.7
8.0
6.8
8.2
9.2
5.5
5.2
5.6
5.1
5.7
7.4
6.7
10.3
4.6
5.9
4.8
4.1
5.6
6.5
6.3
9.6
8.4
years
100
Maximum flood
500
of record
6.3
6.9
7.1
8.3
10.8
6.4
7.8
5.2
9.8
9.6
6.4
8.0
6.6
9.5
8.5
7.2
8.8
9.6
5.9
5.6
6.0
5.5
6.0
7.9
7.2
10.8
5.0
6.4
5.1
4.4
6.0
6.8
6.8
10.3
8.8
6.6
7.1
7.4
8.4
1.2
6.7
8.1
5.4
10.1
10.1 6.7
8.4
6.8
10.0
8.8
7.3
9.3
978
6.2
5.8
6.3
5.8
6.2
8.2
7.6
11.0 5.2
6.7
5.4
4.7
6.3
7.0
7.2
10.7
9.0
6.9
7.2
7.5
8.4
11.2
7.0
8.4
5.7
10.2
10.3
7.0
8.8
7.0
10.3
9.0
7.4
9.6
9.8
6.6
6.1
6.6
6.1
6.4
8.5
7.9
10.95.6
7.0
5.7
5.0
6.6
7.1
7.5
10.9
9.0
Year
1954
1980
1967
1959
1974
1980
1947
1951
1951
1951
1951
1983
1968
1983
1974
1975
1974
1967
1924
1974
1956
1927
1961
1968
1974
1957
1957
1957
1983
1943
1983
1979
1968
1943
1956
Dis
charge
(ftVs)
5,750
5,100
27,500
246
48,500
2,600
3,900
1,690
1,470
5,300
10,900
44,800
446
51,000
6,540
391
41,000
1,460
37,300
1,220
14,600
19,000 64
5,660
16,000
8,600
13,000
21,500
3,300
68,700
8,080
660
24,500
29,000
2,400
RI
(yrs)
40MOO 45
>100
>100 40
>100 30
>100
>100
>100
>100 15
>100
>100 25
>100 90
804
60
90 20 35 25
>100 90
>100 8
>100 35 20
>100
>100
>100
Table
2. Selected ba
sin
characteristics, ye
ars
of re
cord
, equivalent years
of re
cord
,and maximum
Map
Stat
ion
No.
No.
322
05580000
323
05580500
326
05581500
327
05582000
328
05582200
329
05582500
330
05583000
331
05584400
332
05584450
333
05584500
335
05585000
336
05585220
338
05585700
339
05586000
340
05586200
341
05586350
342
05586500
343
05586850
344
05587000
345
05587850
346
05587900
347
05588000
348
05589500
350
05590000
351
05590400
352
05590500
353
05590800
354
05591200
355
05591500
356
05591750
357
205592000
358
05592025
360
05592300
361
205592500
362
05592700
Years
of
record
38
41 41 44
21 32 68
25 16 41 65
25
21 36 25 12 35 25 58
25 17 45
46 41 15 11 13 15 32 20 34 21 24 59
25
A
(mi2
)
227
306
333
1,084.94
26.5
5,093 26.3 .60
655
1,29
3 3.58
.15
29.1 .4
9
1.82
2.30
.02
868.45
212 36.7
22.6
12.4
109
126
149
473 8.05
.70
1,054.2
047.9
1,940.14
S (ft/mi)
6.23
5.12
5.76
2.22
23.76
2.16
1.27
5.76
91.87
3.70
1.85
27.24
48.58
9.03
131.47
53.86
24.29
63.36
2.32
42.50
5.12
7.92
11.09
17.16
2.46
2.22
2.67
1.52
5.23
18.32
1.43
63.89
6.60
1.37
27.09
flood
for
nonregulated ru
ral
gaging stations Continued
I (i
n.)
3.1
3.2
3.2
3.2
3.3
3.3
3.2
3.3
3.3
3.3
3.3
3.3
3.3
3.3
3.4
3. 3. 3. 3. 3. 3.4
3.5
3.5
3.0
3.1
3.1
3.1
3.1
3.2
3.2
3.1
3.2
3.3
3.2
3.3
Regi
on
III
III
III
III
III
III
III
III
III
III
III
III
III I I I I I I I I I I I I I I I I I I I I I I
2Recurrence in
terv
al,
in
5 10
25
50
Equivalent
3.1
3.2
3.1
2.9
4.0
2.9
2.7
3.4
4.8
3.1
2.8
4.1
4.4
3.6
5.2
4.7
4.1
4.4
3.1
4.5
3.4
3C
O
3.8
3.5
2.9
2.9
2.9
2.7
3.3
3.9
2.7
4.5
3.5
2.6
4.1
5.4
4.8
5.6
3.8
5.5
3.2
2.9
4.2
5.6
4.2
4.2
4.8
5.5
3.7
5.2
5.2
6.0
7.2
3.5
5.4
3.4
5.4
5.8
4.0
3.7
4.1
3.3
4.0
4.4
3.0
6.5
4.2
4.6
4.9
6.8
5.8
7.1
4.5
6.3
3.7
3.5
4.9
6.1
4.9
5.1
5.4
6.2
4.2
5.7
5.8
7.0
8.4
4.1
6.0
3.9
6.3
7.1
4.9
4.3
5.0
3.9
4.6
5.0
3.6
7.4
4.9
6.0
5.6
years
8.0
6.8
8.5
5.3
7.1
4.4
4.1
5.6
6.7
5.7
6.0
6.0
6.8
4.8
6.2
6.4
7.8
9.2
4.8
6.7
4.5
7.2
8.2
5.8
5.1
5.9
4.6
5.4
5.6
4.2
8.1
5.6
7.3
6.2
years
100
Maximum flood
500
of record
8.6
7.3
9.0
5.7
7.4
4.7
4.5
6.0
7.0
6.2
6.5
6.4
7.1
5.2
6.5
6.7
8.2
9.5
5.2
7.0
4.9
7.5
8.7
6.2
5.5
6.4
5.0
5.8
6.0
4.6
8.4
6.0
8.0
6.5
8.9
7.6
9.4
6.0
7.6
5.0
4.7
6.3
7.1
6.4
6.9
6.6
7.3
5.5
6.7
6.9
8.3
9.5
5.5
7.2
5.2
8 A
U
7.8
8.9
6.5
5.9
6.7
5.3
6.0
6.2
4.9
8.5
6.3
8.4
6.7
9.1
7.8
9.5
6.3
7.7
5.2
5.1
6.5
7.2
6.7
7.2
6.7
7.3
5.7
6.8
7.0
8.4
9.4
5.8
7.3
5.4
8O»Z
7.9
9.0
6.9
6.2
7.0
5.7
6.3
6.4
5.3
8.5
6.5
8.8
6.9
Year
1981
1983
1983
1943
1965
1979
1943
1980
1961
1985
1985
1958
1961
1977
1961
1966
1957
1973
1943
1958
1979
1946
1957
1968
1974
1959
1979
1985
1974
1978
1957
1960
1970
1957
1957
Dis
charge
(ft3/s)
24,600
23,300
41,200
41,200
1,50
0
534
123,
000
3,500
539
38,900
28,000
1,01
0 744,700
730
1,13
01,700 42
40,0
00 791
8,20
09,340
10,200
1,490
3,310
4,40
04,
030
9,250
1,46
0150
25,900 450
7,48
062,700 132
RI
(yrs
)
>100
>100
>100 50
>100
8>100
>100 25
>100 70 10 10 90 15 10
>100 30 80
>100
9 90
>100 40 15 15 15 15 50 20 30 45 25
>100 30
Tabl
e 2. Selected basin
characteristics, ye
ars
of re
cord
, eq
uiva
lent
years
of re
cord
,and maximum flood
for
nonregulated rural
gaging stations Continued
Map
Stat
ion
No.
No.
363
05592800
364
305593000
365
05593520
366
05593575
367
05593600
368
05593700
369
05593900
370
05594000
371
05594090
373
05594200
374
05594330
375
05594450
376
05594800
377
**05595000
378
05595200
379
05595500
380
05595510
382
05595800
383
05596000
384
05596100
385
505597000
387
05597500
388
05599000
389
505599500
390
05599560
392
05599640
393
05599800
394
05600000
Years
of
reco
rd
15 43 11 18 25 13 22 44 10 17 12 19 15 46 16 23 14~~22~
25 17 60 34 36 43 17 25 12 44
A
(mi2
)
152
2,71
925
4 84.3
17.3 .3
455.5
735
124 1.
9
72.4
154
464
5,181
129 17.8 1.22
21.1
502 1.
03
794 31.7
292
2,169 1.
94 .43
.09
32.2
S (f
t/mi
)
5.83
1.27
2.73
4.42
4.28
34.06
5.54
2.32
3.31
17.16
5.72
4.00
2.34
1.11
6.43
9.77
35.2
214
.52
1.80
39.02
1.53
8.08
2.64
1.00
55.32
111.94
186.91
11.3
0
I (i
n.)
3.3
3.2
3.4
3.4
3.3
3.3
3.3
3.4
3.4
3.5
3.5
3.5
3.5
3.3
3.5
3.5
3.5
3.4
3.4
3.5
3.4
3.5
3.5
3.5
3.6
3.6
3.6
3.5
Regi
on I I I I I I I I I I I I I I I I IIV IV IV IVIV
IV
IV
IV
IV
IV
IV
2Recurrence interval, in
5 10
25
50
Equivalent
3.4
2.7
3.1
3.4
3.3
4.3
3.4
3.1
3.2
4.0
3.4
3.3
3.1
2.7
3.6
3.7
4.3
3.7
2.7
4.3
2.7
3.5
3.0
2.6
4.3
5.0
5.2
3.4
3.9
3.5
3.3
3.9
3.7
5.9
4.6
4.0
3.9
5.7
5.2
3.5
3.2
3.5
4.4
5.8
7.0
5.0
4.2
5.2
3.0
4.0
4.3
2.8
7.2
5.6
7.5
6.5
4.5
4.1
3.8
4.5
4.2
6.8
5.4
4.7
4.5
6.7
6.3
4.0
3.7
4.3
5.0
6.9
8.3
5.8
5.1
5.8
3.5
4.6
5.2
3.3
8.4
6.1
8.3
8.2
years
5.1
4.9
4.5
5.2
4.9
7.5
6.3
5.5
5.2
7.5
7.3
4.6
4.3
5.1
5.7
7.9
9.2
6.5
6.1
6.4
4.1
5.2
6.0
3.9
9.2
6.6
8.8
9.6
years
100
Maximum flood
500
of record
5.5
5.4
4.8
5.6
5.3
7.9
6.7
5.9
5.6
7.8
7.7
5.0
4.7
5.5
6.1
8.3
9.5
6.8
6.6
6.6
4.4
5.5
6.5
4.2
9.5
6.8
8.9
10.1
5.8
5.7
5.1
5.9
5.5
8.0
7.0
6.2
5.9
8.0
8.0
5.2
4.9
5.8
6.4
8.6
9.6
7.Q
6.9
6.8
4.6
5.8
6.7
4.4
9.5
6.9
8.9
10.4
6.1
6.1
5.4
6.1
5.8
8.1
7.2
6.5
6.2
8.1
8.1
5.5
5.2
6.2
6.6
8.7
9.5
7.2
7.1
6.9
4.9
6.0
7.0
4.7
9.4
7.0
8.7
10.4
Year
1983
1943
1985
1968
1973
1966
1967
1943
1973
1968
1979
1979
1979
1943
1973
1968
1969
1961
1961
1970
1961
1983
1961
1961
1969
1965
1961
1943
Dis
charge
(ft3/s)
17,900
54,400
8,640
10,900
2,140
356
5,910
52,000
10,500
966
5,520
10,600
9,200
83,000
14,900
7,760
777
2,530
38,600
835
42,900
3,570
18,800
33,300
3,000
605
148
7,200
RI
(yrs)
35 706
50 40 70 45
>-\O
Q 30 25 15 205
35 50 90 25 20>1
00 40
>100 15 40 35
>100 20 10
>100
1 Regulated
sinc
e 1977 by
Cl
into
n Lake Reservior.
2 Re
gula
ted
sinc
e 19
69 by
Sh
elby
vill
e Re
serv
ior.
3 Re
gula
ted
sinc
e 19
67 by Ca
rlyl
e Reservior.
"* Re
gula
ted
since
1967
by up
stre
am reservoirs.
5 Re
gula
ted
since
1970 by Re
nd Lake Reservior.
Table 3. Regional factors/ Rf
[T-year, recurrence interval in years]
Flood, T-year
2
5
10
25
50
100
500
I
1.057
1.053
1.053
1.051
1.050
1.048
1.044
II
0.578
.576
.574
.570
.567
.563
.555
Region
III
0.805
.822
.837
.853
.862
.870
.886
IV
0.983
.894
.859
.826
.806
.790
.759
Table 4. Accuracy of estimating equations/
QT = a Ab Sc (1-2.5) d Rf
[T-year, recurrence interval in years]
Standard error of prediction
Flood T-year
2
5
10
25
50
100
500
Percent
34.9
33.0
34.9
38.0
40.6
43.4
50.3
Equivalent years of record
3.36
4.54
5.36
6.18
6.58
6.84
7.05
71
Table 5. Selected statistical characteristics for annual peak discharges for nonregulated rural gaging stations
[The
systematic-record and WRC-estimated frequency curves can
be reconstructed using logarithmic
mean, standard deviation, and skew,
and the standard Pearson Type III tables-
WRC, Interagency Advisory Committee on Water Da
ta,
formerly Water Resources Council]
fo
Log-Pearson Type II
I statistics, in log units
Systematic record
Map
No. 1 2 3 5 6 7 8 9 10 1 1
12 13 14 15 16 17 18 19 20 21 22 23 24 25 26
27 28 29 30 31
Station
No.
03336100
03336500
03336900
03337500
03338000
03338100
03338500
03338800
03339000
03341700
03341900
03343400
Q3344000
03344250
03344425
03344500
03345500
03346000
03378000
03378635
03378650
03378900
03378980
03379500
03379650
03380300
03380350
03380400
03380450
03380475
Station name
Big Four Ditch Trib near Paxton,
111.
Bluegrass Creek at Potomac, 111.
Salt Fork near St.
Joseph, 111.
Saline Branch at Urbana, 111.
Salt Fork near Homer, 111.
Salt Fork Trib near Catlin, 11
1.Vermilion River near Ca
tlin
, 11
1.N F Vermilion River Trib nr
Danville, 111.
Vermilion River near Danville, 11
1.Big Creek Trib near Dudley, 111.
Raccoon Creek Trib near Annapolis, 111.
Embarras River near Camargo, 11
1.Embarras River near Di
ona,
111.
Embarras River Trib near Greenup, 111.
Muddy Creek Trib at Woodbury, 111.
Range Creek near Ca
sey,
11
1.Embarras River at
Ste. Marie, 11
1.North Fork Embarras River near Oblong,
111.
Bonpas Creek at
Br
owns
, 111.
Little Wabash River near Effingham, 111.
Second Creek Trib at Keptown, 11
1.Little Wabash River at Louisville, 111.
Little Wabash River Trib at Clay City,
111.
Little Wabash River below Clay City,
111.
Madden Creek near West Salem, 11
1.
Dums Creek Tributary near lu
ka,
111.
Skillet Fork near lu
ka.
111.
Horse Creek Tributary near Ca
rtte
r, 111.
White Feather Creek near Marlow,
111.
Horse Creek near Keenes, 111.
Mean
2.044
3.255
3.398
3.088
3.551
2.219
3.924
2.46
14.116
2.263
1.23
83.461
3.950
1.356
1.36
8
2.933
4.119
3.823
3.442
3.728
2.360
4.045
2.089
4.098
2.620
1.616
3.682
2.34
12.119
3.567
Standard
deviation
0.255
0.238
0.204
0.254
0.245
0.433
0.279
0.319
0.25
10.242
0.307
0.247
0.217
0.262
0.386
0.359
0.324
0.376
0.220
0.161
0.269
0.230
0.344
0.314
0.242
0.239
0.320
0.263
0.228
0.264
Skew
-0.671
-0.206
0.340
-0.502
-0.687
-1.299
0.182
0.297
-0.612
0.673
-0.482
-1.079
0.133
0.042
0.171
-0.775
-1.372
-1.434
-1.250
0.011
0.338
-0.323
-0.606
-0.353
0.562
-0.116
-0.267
0.228
-0.272
-0.246
WRC estimated
Mean
2.044
3.255
3.398
3.088
3.56
1
2.245
3.924
2.46
14.124
2.263
1.23
83.473
3.950
1.356
1.368
2.955
4.135
3.846
3.464
3.728
2.360
4.045
2.089
4.105
2.620
1.61
63.682
2.34
12.119
3.565
Standard
deviation
0.255
0.238
0.204
0.254
0.225
0.386
0.279
0.319
0.233
0.242
0.307
0.227
0.217
0.262
0.386
0.306
0.275
0.312
0.167
0.161
0.269
0.230
0.344
0.298
0.242
0.239
0.320
0.263
0.228
0.208
Skew
-0.545
-0.275
0.034
-0.465
-0.387
-0.730
-0.094
-0.026
-0.285
0.070
-0.446
-0.694
-0.106
-0.134
-0.106
-0.003
-0.208
-0.409
0.-0.178
-0.039
-0.357
-0.503
-0.163
0.098
-0.229
-0.328
-0.130
-0.321
-0.186
Table 5. Selected statistical characteristics fo
r annual peak discharges fo
r nonregulated rural gaging stations Continued
OJ
Log-Pearson Type III
statistics, in log units
Systematic record
Map
No. 32 33 34 35 36 37 39
40
41 42 4345
464748
49 50
51 5253
545556
57
58 59
60
61 62
63 64 65
66 67
68
Station
No.
03380500
03381500
03381600
03382025
03382100
03382170
03382510
03382520
03384450
03385000
03385500
03612000
03612200
03614000
04087300
04087400
05414820
05415000
05415500
05418750
05418800
05419000
05420000
05430500
05431500
05434500
05435000
05435500
05435650
05436500
05436900
05437000
05437500
05437600
05437950
Station na
me
Skillet Fork at
Wayne City,
111.
Little Wabash River at
Carrai,
111.
Little Wabash River Trib nr New Ha
ven,
11
1.Little Saline Creek Trib nr Goreville, 111.
South Fo
rk Saline River nr Carrier Mills, 111.
Brushy Creek near Ha
rco,
111.
Eagle Creek near Equality, 111.
Black Branch Trib near Junction, 111.
Lusk Creek near Eddyville, 111.
Hayes Creek at
Glendale, 111.
Lake Glendale Inlet near Dixon Springs, 111.
Cache River
at Fo
rman
, 111.
Q Ditch Trib near Ch
oat,
111.
Hess Bayou Trib near Mound City, 11
1.Lake Michigan Trib at Winthrop Harbor, 11
1.
Kellogg Ravine at Zi
on,
111.
Sinsinawa River near Menominee, 11
1.Galena River at
Buncombe, Wis.
East Fo
rk Galena River at Council Hill,
111.
South Fork Apple
River near Nora,
111.
Mill Creek Trib near Scales Mo
und,
111.
Apple River near Hanover, 11
1.Plum River below Carroll Creek nr Savanna, 111.
Rock River at
Afton, Wi
s.Turtle Creek near Clinton, Wi
s.
Pecatonica River at Martintown, Wi
s.Cedar Creek near Wins low
, 11
1.Pecatonica River at Freeport, 111.
Lost Creek Trib near Shannon, 111.
Sugar River near Brodhead, Wi
s.
Otter Creek Trib near Durand,
111.
Pecatonica River at Shirland, 11
1.Rock River at
Ro
ckto
n, 111.
Rock River Trib near Rockton, 111.
Kishwaukee River
near Huntley, 111.
Mean
3.898
4.153
1.948
2.407
3.438
3.056
2.714
2.186
3.751
3.351
2.748
3.568
2.134
2.643
1.908
2.370
3.475
3.690
3.300
2.266
2.393
3.717
3.540
3.785
3.300
3.750
1.978
3.756
2.417
3.533
1.706
3.912
4.143
2.130
2.097
Standard
deviation
0.310
0.224
0.295
0.213
0.191
0.161
0.075
0.353
0.215
0.262
0.261
0.267
0.260
0.168
0.308
0.289
0.334
0.241
0.382
0.366
0.287
0.206
0.275
0.196
0.369
0.245
0.572
0.249
0.255
0.324
0.335
0.208
0.234
0.331
0.120
Skew
-0.452
-0.193
0.314
-2.063
-0.707
0.819
-0.644
0.172
0.444
0.198
-0.433
-0.320
0.182
-0.406
0.608
0.651
0.404
0.841
0.342
-1.060
-0.177
-0.003
-0.070
-0.730
-0.187
-0.041
-0.470
0.045
-1.399
-0.217
0.258
-0.345
-1.272
-0.859
-0.612
WRC estimated
Mean
3.907
4.161
1.94
82.434
3.451
3.056
2.714
2.186
3.75
13.351
2.748
3.568
2.134
2.657
1.908
2.370
3.475
3.690
3.300
2.29
3
2.393
3.717
3.540
3.795
3.300
3.750
1.978
3.756
2.449
3.533
1.706
3.912
4.155
2.130
2.097
Standard
deviation
0.29
10.209
0.295
0.139
0.165
0.161
0.075
0.353
0.215
0.262
0.261
0.267
0.260
0.142
0.308
0.289
0.334
0.24
10.382
0.31
1
0.287
0.206
0.275
0.185
0.369
0.245
0.572
0.249
0.183
0.324
0.335
0.208
0.200
0.33
10.120
Skew
-0.203
0.029
-0.036
-0.079
-0.247
0.130
-0.480
-0.118
0.050
0.018
-0.387
-0.321
-0.041
-0.009
0.071
0.062
-0.002
0.37
10.
051
-0.502
-0.280
-0.103
-0.175
-0.393
-0.253
-0.140
-0.439
-0.044
-0.197
-0.258
-0.0
51-0.366
-0.355
-0.600
-0.4
91
Table
5. Selected statistical
char
acte
rist
ics
for
annual peak discharges for
nonregulated ru
ral
gaging stations Continued
Log-Pearson Type II
I st
atis
tics
, in
log
units
Systematic re
cord
Map
No. 69
70
7172
73
74
757677
78
79
80
8182
83
84
8586
8788
89
90
919394
95
96979899
100
101
102
103
104
Station
No.
05438250
05438300
05438390
05438500
05438850
05439000
05439500
05439550
05440000
05440500
05440650
05440900
05441000
05441500
05442000
05443500
05444000
05444100
05446000
05446500
05446950
05447000
05447050
05447350
05447500
05448000
05448050
05466000
05466500
05467000
05467500
05468000
05468500
05469000
05469500
Station name
Coon Creek
at Ri
ley,
11
1.Lawrence Creek
Trib ne
ar Harvard, 111.
Piscasaw Cr below
Moke
ler
Cr nr Ca
pron
, 11
1.Kishwaukee River
at Be
lvid
ere,
11
1.Md Br of
So Br
Kishwaukee River
nr Ma
lta,
11
1.
South
Branch Kishwaukee River
at De
Ka
lb,
111.
Sout
h Br
anch
Ki
shwaukee River
nr Fairdale,
111.
So Br
Kishwaukee
Ri
ver
Trib
nr Irene, 111.
Kishwaukee River
near Perryville,
111.
Killbuck Creek
near Monroe Ce
nter
, 11
1.
Stil
lman
Creek
Trib near Holcomb, 11
1.Le
af River
Trib ne
ar Forreston, 11
1.Le
af Ri
ver
at Le
af Ri
ver,
11
1.Rock River
at Or
egon
, 11
1.Kyte Ri
ver
near
Flagg Ce
nter
, 111.
Rock
River
at Co
roo,
111.
Elkh
orn
Creek
near
Penrose, 11
1.Sp
ring
Cr
eek
Trib near Co
leta
, 11
1.Rock Creek
at Mo
rris
on,
111.
Rock
Ri
ver
near
Jo
slin
, 11
1.
Green
River
Trib
ne
ar Am
boy,
111.
Green
River
at Amboy, 111.
Green
Rive
r Trib
No.
2 nr Oh
io,
ill.
Mud
Cree
k Trib ne
ar At
kins
on,
111.
Green River
near
Geneseo, 11
1.
Mill Cr
eek
at Mi
lan,
111.
Sand Creek near Milan, 111.
Edwa
rds
River
near
Orion, 11
1.Ed
ward
s River
near
New
Bost
on,
111.
Pope Creek
near
Ke
iths
burg
, 11
1.
Henderson
Creek
near
Li
ttle
York,
111.
North
Henderson
Creek
near Sea ton. 11
1.Cedar
Creek
at Li
ttle
York,
111.
Hend
erso
n Cr
eek
near Oquawka, 11
1.South
Henderson
Creek
at Biggsville,
111.
Mean
3.047
1.87
83.206
3.552
2.129
2.906
3.564
1.880
3.832
3.340
1.895
1.744
3.418
4.328
3.096
4.365
3.455
2.418
3.312
4.345
1.944
3.418
2.126
2.240
3.744
3.420
1.547
3.485
3.593
3.355
3.380
3.030
3.347
3.693
3.265
Standard
deviation
0.370
0.277
0.275
0.308
0.291
0.257
0.256
0.469
0.286
0.345
0.307
0.323
0.350
0.224
0.170
0.223
0.245
0.309
0.179
0.209
0.424
0.262
0.314
0.357
0.208
0.330
0.418
0.243
0.247
0.249
0.298
0.149
0.365
0.266
0.297
Skew
-0.984
-0.178
-1.265
-0.321
-0.719
1.038
-0.930
-0.279
-0.613
-1.043
-0.049
0.455
-0.587
0.338
0.321
-0.830
-0.9T6
-0.383
0.233
-0.456
0.495
-1.027
-0.801
-0.448
-0.960
-0.472
0.181
-1.292
-0.365
-0.113
0.761
-0.791
-0.144
0.439
0.813
WRC estimated
Mean
3.065
1.878
3.251
3.552
2.149
2.906
3.564
1.880
3.832
3.340
1.895
1.744
3.418
4.328
3.096
4.370
3.463
2.418
3.312
4.345
1.944
3.428
2.160
2.286
3.750
3.420
1.547
3.503
3.593
3.355
3.375
3.030
3.347
3.693
3-265
Standard
deviation
0.338
0.277
0.181
0.308
0.255
0.257
0.256
0.469
0.286
0.345
0.307
0.323
0.350
0.224
0.170
0.213
0.227
0.309
0.179
0.209
0.424
0.245
0.246
0.277
0.194
0.330
0.418
0.205
0.247
0.249
0.290
0.149
0.365
0.266
0.297
Skew
-0.633
-0.281
-0.059
-0.345
-0.341
0.146
-0.720
-0.339
-0.540
-0.757
-0.216
0.062
-0.521
-0.121
-0.100
-0.615
-0.574
-0.393
0.028
-0.438
0.015
-0.706
-0.074
0.159
-0.640
-0.449
-0.060
-0.707
-0.375
-0.188
0.310
-0.547
-0.219
0.184
0.344
Tabl
e 5. Selected st
atis
tica
l characteristics
for
annual peak discharges fo
r no
nreg
ulat
ed ru
ral
gaging stations Continued
-J
Ul
Log-Pearson Type III
statistics, in
log
units
Systematic record
Map
No.
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
132
134
139
144
189
190
213
225
226
Station
No.
05469750
05495200
05495500
05496900
05501500
05502020
05502040
05502120
05512500
05513000
05513200
05518000
05519500
05520000
05520500
05524500
05525000
05525050
05525500
05526000
05526150
05526500
05527050
05527500
05527800
05527840
05527900
05528000
05528360
05529000
05536178
05536190
05537500
05540110
05540140
Station name
Ellison Creek Trib near Roseville, 111.
Little Creek near Breckenridge, 11
1.Bear Creek near Marcelline, 111.
Homan Creek Trib near Quincy, 11
1.Burton Creek Trib near Burton, 111.
Hadley Creek near Barry, 111.
Hadley Creek at Kinderhook, 111.
Riser Creek Trib near Barry, 111.
Bay Creek at Pittsfield, 111.
Bay Creek at Ne
bo,
111.
Salt Spring Creek near Gilead, 11
1.Kankakee River at Shelby, Ind.
West Creek near Schneider, Ind.
Singleton Ditch at
Illinoi, 111.
Kankakee River at
Mo
me ne
e, 111.
Iroquois River near Foresman, Ind.
Iroquois River at
Iroquois, 111.
Eastburn Hollow near Sheldon, 11
1.Sugar Creek at
Milford, 111.
Iroquois River near Chebasne, 111.
Kankakee River Trib near Bourbonnais, 111.
Terry Creek near Custer Park,
111.
Prairie Creek near Frankfort, 111.
Kankakee River near Wilmington, 111.
Des Plaines River at
Russell, 11
1.
Des Plaines River at Wadsworth, 11
1.North Mill Creek at
Hickory Corners, 111.
Des Plaines River near Gurnee, 111.
Aptakisic Creek at
Aptakisic, 111.
Des Plaines River near De
s Plaines, 111.
Plum Creek ne
ar Dy
er,
Ind.
Hart Ditch at Mu
nste
r, Ind.
Long Run near Le
mont
, 11
1.Ferry Creek at
Warrenville, 111.
East Br
Du
Page River
nr Bloomingdale, 111.
Mean
1.712
2.575
3.936
2.372
2.191
3.623
3.774
2.544
3.647
3.808
2.439
3.617
2.946
3.215
3.800
3.432
3.565
2.381
3.807
4.087
1.506
2.192
1.926
4.359
2.787
2.863
2.266
3.115
2.031
3.305
3.010
3.117
2.768
1.938
1.750
Standard
deviation
0.299
0.347
0.272
0.345
0.406
0.263
0.296
0.327
0.332
0.323
0.320
0.114
0.248
0.153
0.157
0.163
0.186
0.400
0.277
0.205
0.484
0.348
0.384
0.224
0.369
0.371
0.228
0.204
0.297
0.217
0.254
0.181
0.308
0.202
0.303
Skew
-0.545
-0.377
-0.375
-0.585
-0.238
-1.280
-0.833
-0.572
-0.724
-0.776
0.307
-0.587
-1.263
-1.842
-0.453
-0.429
-0.077
0.444
-0.110
-0.532
0.067
0.641
0.121
-0.162
-0.617
-1.134
-0.962
-0.262
0.014
-0.819
-1.094
-0.160
0.235
0.482
-0.307
WRC estimated
Mean
1.712
2.575
3.936
2.372
2.191
3.642
3.785
2.564
3.658
3.820
2.439
3.620
2.967
3.229
3.800
3.438
3.565
2.38
13.807
4.098
1.506
2.215
1.963
4.359
2.787
2.863
2.313
3.115
2.031
3.320
3.049
3.117
2.768
1.938
1.75
0
Standard
deviation
0.299
0.347
0.272
0.345
0.406
0.217
0.275
0.285
0.312
0.300
0.320
0.107
0.201
0.115
0.157
0.151
0.186
0.400
0.277
0.199
0.484
0.306
0.317
0.224
0.369
0.371
0.204
0.204
0.297
0.210
0.219
0.181
0.308
0.202
0.303
Skew
-0.480
-0.387
-0.384
-0.494
-0.324
-0.441
-0.534
-0.099
-0.485
-0.477
0.002
-0.378
-0.425
-0.373
-0.440
-0.193
-0.174
0.005
-0.204
-0.260
-0.121
0.322
0.214
-0.213
-0.517
-0.674
-0.146
-0.308
-0.193
-0.520
-0.580
-0.233
0.013
0.040
-0.352
Table 5. Selected statistical characteristics for
annual peak discharges fo
r nonregulated rural gaging stations Continued
Log-Pearson Type II
I statistics, in
log units
Systematic record
Map
No.
232
233
235
236
239
241
243
245
248
249
250
251
252
254
255
256
257
258
259
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
Station
No.
05541750
05542000
05546500
05548150
05549700
05549900
05550300
05550450
05551030
05551050
05551060
05551200
05551520
05551620
05551650
05551700
05551800
05551900
05551930
05554000
05554500
05554600
05555000
05555300
05555400
05555775
05556500
05557000
05557100
05557500
05558000
05558050
05558075
05558500
05559000
Station name
Mazon River Trib near Gardner, 11
1.Mazon River near Coal City,
111.
Fox River at
Wi
lmot
, Wi
s.North Br
Nippers ink
Creek nr Genoa City,
Wis.
Mutton Creek at
Island Lake,
111.
Fox River Tributary near Gary, 11
1.Tyler Creek at Elgin, 111.
Poplar Creek near Ontarioville, 111.
Brewster Creek at
Valley View, 111.
Norton Creek near Wa
yne,
11
1.
Norton Creek near St.
Charles, 111.
Person Creek near St.
Charles, 111.
Indian Creek near North Aurora, 111.
Blackberry Creek near Kaneville, 111.
Lake Run Tributary near Batavia, 111.
Blackberry Creek near Yorkville, 111.
Fox River Trib No.
2 near Fox, 11
1.E
Branch Big Ro
ck Creek near Big Rock,
111.
Welch Creek near Big Rock,
ill.
North Fork Vermilion River near Charlotte, 11
1.
Vermilion River at
Pontiac, 11
1.Mud Creek Tributary near Odell, 11
1.Vermilion River at Streator, 111.
Vermilion River near Leonore, 11
1.Vermilion River Trib at
Lowell, 111.
Vermilion Creek Trib at
Meriden, 111.
Big Bureau Creek at Princeton, 111.
West Bureau Creek at Wyanet, 111.
West Bureau Creek Trib near Wyanet, 111.
East Bureau Creek near Bureau, 111.
Big Bureau Creek at Bureau, 111.
Coffee Creek Trib near Florid, 111.
Coffee Creek Trib near Hennepin, 11
1.Crow Creek (W
est) near Henry, 111.
Gimlet Creek at
Spar lan
d, 111.
Mean
1.987
3.892
3.418
2.23
11.849
1.032
2.488
2.317
2.35
11.950
2.102
2.925
2.112
2.616
1.70
2
2.812
1.802
2.799
2.494
3.336
3.705
1.656
3.877
4.051
1.410
1.588
3.587
3.434
1.900
3.355
3.895
1.249
1.78
53.180
2.907
Standard
deviation
0.227
0.298
0.203
0.171
0.339
0.450
0.186
0.172
0.307
0.334
0.308
0.292
0.263
0.134
0.432
0.282
0.486
0.210
0.197
0.252
0.238
0.350
0.252
0.276
0.505
0.309
0.325
0.312
0.354
0.305
0.205
0.429
0.335
0.295
0.251
Skew
-1.702
-1.128
0.105
-0.383
0.097
-0.415
-2.472
0.001
-0.306
0.586
1.054
-1.033
-0.084
-0.713
0.602
-0.645
-0.120
0.174
-0.197
-0.663
-0.310
-0.719
-0.380
-0.405
0.498
-0.651
-1.021
-0.089
0.036
-0.399
-0.168
-0.254
0.643
0.257
-0.608
WRC estimated
Mean
2.008
3.90
13.418
2.231
1.889
1.032
2.517
2.317
2.351
1.99
3
2.102
2.940
2.112
2.626
1.702
2.812
1.802
2.799
2.494
3.336
3.71
11.656
3.877
4.051
1.410
1.61
33.587
3.434
1.900
3.355
3.895
1.249
1.785
3.180
2.907
Standard
deviation
0.178
0.28
10.203
0.171
0.370
0.450
0.104
0.172
0.307
0.387
0.296
0.266
0.263
0.115
0.432
0*282
0.486
0.210
0.197
0.252
0.240
0.350
0.252
0.276
0.505
0.265
0.325
0.312
0.354
0.305
0.205
0.429
0.335
0.295
0.251
Skew
-0.687
-0.761
-0.041
-0.391
-0.091
-0.408
-0.395
-0.193
-0.354
0.213
0.225
-0.656
-0.231
-0.272
0.057
-0.532
-0.251
-0.128
-0.301
-0.568
-0.348
-0.550
-0.391
-0.404
0.066
-0.289
-0.767
-0.173
-0.150
-0.400
-0.306
-0.321
0.154
0.018
-0.525
Table 5. Selected statistical characteristics fo
r annual peak discharges for
nonregulated rural gaging stations Continued
Log-Pearson Type II
I statistics, in log
units
Systematic record
Map
No.
277
280
283
284
285
286
287
288
289
290
291
292
293
294
297
298
299
300
301
304
306
307
308
309
310
311
312
313
314
316
317
318
319
320
321
Station
No.
05559500
05561000
05563000
05563100
05563500
05564400
05564500
05565000
05566000
05566500
05567000
05567500
05567800
05568000
05568800
05568850
05569500
05569825
05570000
05570370
05571000
05572000
05572100
05572450
05572500
05574000
05574500
05575500
05575800
05576500
05577500
05577700
05578500
05579500
05579750
Station na
me
Crow Creek ne
ar Washburn, 111.
Ackerman Creek at
Farmdale, 111.
Kickapoo Creek near Kickapoo, 111.
Kickapoo Creek Trib near Kickapoo, 111.
Kickapoo Creek at Peoria,
111.
Money Creek ne
ar Towanda, 111.
Money Creek above Lake Bloomington, 111.
Hickory Creek above Lake Bloomington, 11
1.East Branch Panther Creek near Gridley, 111.
East Branch Panther Creek at El Pa
so,
111.
Panther Creek near El Paso,
111.
Mackinaw River ne
ar Congerville, 111.
Indian Creek Trib near Hopedale, 111.
Mackinaw River near Green Valley, 111.
Indian Creek ne
ar Wyoming, 111.
Forman Creek Trib near Victoria, 111.
Spoon River at
London Mills, 111.
Cedar Creek Trib at
St
. Augustine, 111.
Spoon River at
Se
vill
e, 111.
Big Creek near Bryant, 111.
Sangamon River at Mahomet, 11
1.Sangamon River at Monticello, 111.
Wildcat Creek Trib near Monticello, 111.
Friends Creek at Argenta, 11
1.Sangamon River near Oakley, 111.
South Fork Sangamon River near Nokomis, 111.
Flat Branch ne
ar Taylorville, 111.
South Fork Sangamon River at Kincaid, 111.
Horse Creek at Pawnee, 111.
Sangamon River at
River ton
, 111.
Spring Creek at Springfield, 111.
Sangamon River Trib at
Andrew, 111.
Salt Creek ne
ar Rowell, 111.
Lake Fo
rk near Cornland, 111.
Kickapoo Creek Trib at Hey worth, ill.
Mean
3.333
2.797
3.859
1.42
83.902
2.940
2.954
2.656
2.196
2.775
3.340
3.939
2.227
3.925
3.185
1.966
4.007
2.576
4.093
2.901
3.607
3.715
1.45
93.217
3.755
3.018
3.565
3.640
3.259
4.157
3.238
2.318
3.566
3.291
2.616
Standard
deviation
0.227
0.405
0.329
0.447
0.260
0.237
0.307
0.418
0.312
0.324
0.320
0.280
0.371
0.303
0.238
0.402
0.220
0.272
0.226
0.147
0.285
0.285
0.247
0.269
0.250
0.343
0.314
0.299
0.251
0.308
0.386
0.318
0.357
0.338
0.306
Skew
-0.076
-0.222
-0.056
0.106
0.885
-0.030
-0.952
-0.989
1.321
0.989
-0.004
0.531
-0.918
0.686
0.587
-0.693
0.649
-0.191
-0.126
-0.662
-0.073
-0.472
-0.519
0.678
0.398
0.874
-0.874
-0.019
-0.823
-1.252
-0.273
-0.333
0.148
-0.669
0.609
WRC estimated
Mean
3.33
32.797
3.859
1.42
83.902
2.940
2.980
2.68
12.196
2.775
3.340
3.939
2.265
3.925
3.185
2.004
4.007
2.59
34.093
2.90
1
3.607
3.722
1.459
3.217
3.755
3.018
3.580
3.646
3.259
4.175
3.238
2.318
3.566
3.338
2.616
Standard
deviation
0.227
0.405
0.329
0.447
0.260
0.237
0.243
0.373
0.312
0.324
0.320
0.280
0.299
0.303
0.238
0.337
0.220
0.237
0.226
0.147
0.285
0.270
0.247
0.269
0.250
0.343
0.281
0.302
0.25
10.265
0.386
0.318
0.357
0.342
0.306
Skew
-0.180
-0.293
-0.160
-0.125
0.380
-0.177
0.089
-0.593
0.285
0.341
-0.130
0.20
1-0.358
0.358
0.145
-0.258
0.270
0.169
-0.185
-0.512
-0.189
-0.278
-0.462
0.085
0.063
0.310
-0.451
-0.107
-0.594
-0.585
-0.316
-0.363
-0.026
0.374
0.082