list of tables list of figures - vbwd...list of appendices appendix a-5.27 additional macrophyte...

2015 Valley Branch Watershed District Watershed Management Plan Legion Pond Watershed Management Plan Barr Engineering Company Page 5.27-i P:\Mpls\23 MN\82\2382174\WorkFiles\2015 VBWD Plan\Final\Section 5.27 - Legion Pond.doc

5.27 Legion Pond Watershed Management Plan ....................................................... 5.27-1 5.27.1 General Information ............................................................................. 5.27-1 5.27.2 Water Quality Management Plan .......................................................... 5.27-2

5.27.2.1 Water Chemistry .................................................................... 5.27-3 5.27.2.2 Biological Data ...................................................................... 5.27-3

5.27.3 Water Quantity Management Plan ........................................................ 5.27-4 5.27.3.1 Water Quantity Issues and History ......................................... 5.27-4

5.27.4 References ............................................................................................ 5.27-7

List of Tables

Table 5.27-1 Summary of Legion Pond summer average water quality ..................................... 5.27-3

Table 5.27-2 Low Structures around Legion Pond (from 1976 Flood Damage Report) .............. 5.27-5

List of Figures

Figure 5.27-1 Legion Pond Watershed – Subwatersheds and Flow Routing ................ 5.27-8

Figure 5.27-2 Legion Pond Watershed – Current (2010) and Future (2030) Land Use . 5.27-9

Figure 5.27-3 Legion Pond Water Quality Data Summary ......................................... 5.27-10

Figure 5.27-4 Legion Pond Water Level Data ............................................................ 5.27-11

List of Appendices

Appendix A-5.27 Additional Macrophyte Information

2015 Valley Branch Watershed District Watershed Management Plan Legion Pond Watershed Management Plan Barr Engineering Company Page 5.27-1 P:\Mpls\23 MN\82\2382174\WorkFiles\2015 VBWD Plan\Final\Section 5.27 - Legion Pond.doc

5.27 Legion Pond Watershed Management Plan

5.27.1 General Information

Legion Pond is located south of 30th

Street North and east of Lake Elmo

Avenue North (CSAH 17), in the City

of Lake Elmo. Legion Pond is

landlocked and its water level has

fluctuated greatly over the years,

causing flooding to adjacent

properties.

The entire 224-acre watershed

tributary to Legion Pond lies within

the City of Lake Elmo (see Figure

5.27-1). Within the watershed,

approximately 8 acres is platted into

0.4-acre lots on the northeast side of

Legion Pond. In addition, the

residential lots (0.5 to 1.0 acre) along

the south side of 30th Street North

are within the Legion Pond drainage

area. Some agricultural land use is

located at the south end of the

watershed, while the north end

includes some undeveloped area.

The Metropolitan Council future

(2030) estimated land use assumes

that the remaining agricultural and

undeveloped land will be developed

as rural, large-lot, or single family

residential land use. Current (2010)

and estimated future (2030) use of

the Legion Pond watershed is shown

on Figure 5.27-2.

Use of Legion Pond is limited to

aesthetic viewing by area residents,

and detaining and treating stormwater

runoff. There is no public access to

the pond.

Legion Pond Watershed Information

Tributary Area (acres) 224

MDNR-Designated Basins within Watershed

82-0460W, 82-0462W (Legion Pond)

Downstream Watershed Landlocked

Legion Pond Information

MDNR Designation 82-0462W

Surface Area (acres) 16.2 at El. 883.0

Mean Depth (feet) Not determined

Maximum Depth (feet) Not determined

Volume Below Discharge Elevation (acre-feet)

Not determined

Discharge Elevation 906.2

Outlet Type Landlocked/ Overland

MDNR Ordinary High Water Level (OHW)

None Established

100-Year Flood Level1 888.7

VBWD “Allowable Fill”

(cubic yards/lineal foot of shoreline)

(See Section 4.7.)

1.0

VBWD Water Quality Priority Category

Low

1 Elevation in NAVD88 vertical datum


5.27.2 Water Quality Management Plan

The VBWD classified and will manage Legion Pond as a Low Priority waterbody (see Section 4.1 –

Water Quality) based on the lack of public access and likelihood of being classified as a wetland by

the Minnesota Pollution Control Agency (MPCA). This classification is below the Medium Priority

assigned to Legion Pond in the 2005 Plan and similar to the classification in the VBWD 1995 Plan,

Legion Pond was classified as a Level V (wetland) waterbody.

The water quality of Legion Pond is generally poor. The VBWD has a non-degradation water quality

policy which sets “action triggers” for all of its major waterbodies. Section 4.1 – Water Quality

discusses the action triggers in more detail. Action triggers for VBWD lakes consider the following

water quality parameters (summer average) relative to MPCA water quality standards and prior water

quality data (i.e., trend analysis):

Secchi disc depth

Total phosphorus

Chlorophyll a

Specific water quality implementation tasks for Legion Pond include the following:

1. The VBWD will cooperate with other entities to monitor the water quality of Legion Pond at

the interval(s) specified in Section 4.1 – Water Quality for Low Priority waterbodies. As for

all Low Priority waterbodies, the VBWD will perform additional monitoring or other actions

on a case-by-case (see Table 4.1-6).

The VBWD will evaluate the average summertime water quality (total phosphorus,

chlorophyll a, and Secchi disc transparency) and compare it to water quality standards (if

applicable) and applicable action triggers (described in Section 4.1.7.5).

2. The VBWD will cooperate with other entities in support of macrophyte management efforts.

VBWD efforts may include:

point-intercept surveys of aquatic vegetation

preparation of lake vegetation management plans (LVMP)

completion of Invasive Aquatic Plant Management (IAPM) Permit applications

design of herbicide treatment programs

participation in meetings with MDNR staff

other technical analysis


3. The VBWD will continue to implement its Rules and Regulations (2013, as amended) in the

Legion Pond watershed. The VBWD Rules address water quality performance standards for

development and redevelopment projects, as well as required vegetated buffers around

VBWD lakes, streams, and wetlands. The VBWD Rules and Regulations are included in this

Plan as Appendix A-4.5.

5.27.2.1 Water Chemistry

Water quality sampling has been conducted on Legion Pond as far back as 1986. The VBWD

conducted water quality sampling in 2003, 2005, 2006, 2008, and 2009. Water quality samples are

typically analyzed for total phosphorus and chlorophyll a, while Secchi disc transparency is

measured in the field at the time of sampling (see Appendix A-4.1 – Water Quality Background

Information).

The most recent 10-year average summer water quality data is presented in Table 5.27-1. Available

water quality data is presented graphically in Figure 5.27-3.

Table 5.27-1 Summary of Legion Pond summer average water quality

Parameter Units

10-year

Average

(2004-2013)

Trend in

Average

MPCA

Standard1

Total Phosphorus ug/L 105 None NA

Chlorophyll a ug/L 45.7 None NA

Secchi Disc Depth m 0.68 None NA

1 MPCA eutrophication water quality standards are not applicable to wetlands

While water quality in Legion Pond fluctuates annually, Secchi disc transparency generally worsened

during the period from 2003 through 2009. During that period, summer average chlorophyll a

generally increased (see Figure 5.27-3). The minimum (i.e., worst) Secchi disc transparency observed

(0.3 meters in 2009) actually occurred the same season as the lowest (i.e., best) summer average total

phosphorus concentration (about 40 ug/L).

The most recent 10-years of data identify no statistically significant trends in total phosphorus,

chlorophyll a, or Secchi disc transparency.

5.27.2.2 Biological Data

Various types of biological data have been compiled and evaluated for Legion Pond, in addition to

physical and chemical parameters. Macrophyte (large aquatic plant), phytoplankton (non-rooted

floating plants – algae), zooplankton (microscopic aquatic animals), and fisheries data provide

insight into the ecological quality of a waterbody. Section 4.2 (Water Quality Background

Information) provides more information about the importance of fisheries and other biological data.

2015 Valley Branch Watershed District Watershed Management Plan Legion Pond Watershed Management Plan Barr Engineering Company .27-4 P:\Mpls\23 MN\82\2382174\WorkFiles\2015 VBWD Plan\Final\Section 5.27 - Legion Pond.doc

The Legion Pond fishery is not currently managed by the MDNR and no stocking or fishery surveys

have been performed. The pond does not have a fisheries-use classification and no fish consumption

advisories are currently in effect. The MDNR’s Lakefinder website includes the most current data on

Legion Pond and is available at: http://www.dnr.state.mn.us/lakefind/lake.html?id=82046200

The VBWD conducted macrophyte (large aquatic plant) surveys of Legion Pond on June 13, 2003,

August 20, 2003, May 28, 2007, June 4, 2009, and June 13, 2013. Appendix A-5.27 includes the

2003, 2007, 2009, and 2013 macrophyte survey information. The VBWD collects macrophyte data to

identify the conditions of plant growth throughout the lake. Macrophytes are the primary producers

in the aquatic food chain, converting the basic chemical nutrients in water and soil into plant matter

through photosynthesis, which becomes food for all other aquatic life. While macrophytes can

negatively impact the recreational use of a water body, they are critical to the ecosystem as fish and

wildlife habitat.

In all four survey years, a healthy, diverse plant community was found throughout the pond. Among

the thirteen to fourteen species observed in the 2003 survey was a clean water species that is

eliminated by degraded conditions. Whitestem pondweed (Potamogeton praelongus), which requires

fairly good water clarity, was observed on the west side of the pond during both 2003 surveys. This

species was not observed in 2007, 2009, or 2013, suggesting that water quality has deteriorated over

this period. Plants found in Legion Pond are common to Minnesota lakes and ponds and provide

good habitat for the fish and aquatic animals living within the pond. No non-native exotic species

were noted in the any of the surveys.

Phytoplankton (microscopic plants), and zooplankton (microscopic animals) data have not been

collected from Legion Pond.

5.27.3 Water Quantity Management Plan

As of the writing of this Plan, the VBWD has no plans to manage water levels on Legion Pond. If

flooding issues occur in the Legion Pond watershed in the future (see Section 5.27.3.1), the VBWD

will consider working with the City of Lake Elmo in implementing a solution to reduce flood risk.

Water level monitoring was performed on Legion Pond from 2008 to 2010 (see Figure 5.27-4). The

VBWD will continue to monitor water levels on Legion Pond as volunteer or staff time and access

allow.

5.27.3.1 Water Quantity Issues and History

High water levels at Legion Pond in the past have caused flooding concerns . In June 1980, the City

of Lake Elmo prepared a feasibility report on temporary pumping from Legion Pond to Lake Elmo in

response to a petition from Legion Pond area residents. No homes were in danger of flooding at that

time, but five septic systems were believed to be inoperable. Although the City of Lake Elmo applied

for a MDNR permit, no pumping occurred. As a result of the high water levels, residents adjacent to

the pond placed fill on their properties. The fill created a short dike between the pond and their

homes. Because the cumulative effect of the filling activity raised the 100-year flood level of Legion


Pond by approximately 0.1 foot, no additional filling around the pond is likely to be permitted by the

VBWD.

High water levels during the period 1985 through 1987 caused residents to request assistance from

both the VBWD and the City of Lake Elmo. In the fall of 1985, the VBWD granted a permit to the

City of Lake Elmo to pump approximately 40 acre-feet of water from Legion Pond to Lake Elmo. As

a result of the City’s pumping, the pond dropped 1.5 feet. In April, 1987, the City of Lake Elmo

petitioned the VBWD for a project to reduce high water levels on Legion Pond. Since the petition

was not in conformance with the previous VBWD water management plan, the petition could not be

acted on until the water management plan was amended. Legion Pond residents rejected two City of

Lake Elmo pumping proposals because of the high cost and because the proposed pumping was not a

permanent solution to their high water problems. In June 1987, the City of Lake Elmo ordered a

pumping project to lower water levels in Legion Pond. The pumping project was not undertaken; it is

assumed that the 1987-1988 drought relieved the flooding situation on Legion Pond.

According to the City of Lake Elmo’s 1976 Flood Damage Report, the lowest home on Legion Pond

is at Elevation 886.1. Table 5.27-2 lists the low home and septic tank elevations based on the 1976

report. Based on Washington County’s 2000 two-foot topography, the low point of the short dike

between the pond and the homes is between Elevation 886 and Elevation 888.The lowest septic tanks

are at approximately Elevation 882. Since the control elevation of Lake Elmo is at Elevation 884.1, it

would be possible to install a gravity outlet from Legion Pond to Lake Elmo, protecting the low

homes on Legion Pond.

Table 5.27-2 Low Structures around Legion Pond (from 1976 Flood Damage Report)

Address Owner

Elevation of

House Walk Out

Elevation of Top of

Septic Tank

2832 Legion Avenue Borgegne 886.1 881.9

2790 Legion Avenue Deck 886.5 C.N.L.

2814 Legion Avenue Collyard 886.8 884.2

2778 Legion Avenue Peterson 887.2 884.2

2764 Legion Avenue Toft 888.4 Less than 882.2

2866 Legion Avenue Zetterlund 888.9 886.2

C.N.L. = Could not locate

*Information taken from 1976 Flood Damage Report prepared by Bonestroo, Rosene, Anderlik & Associates, Inc.

There appear to be three feasible solutions to the Legion Pond high water problem. Each of the

following solutions would require an analysis of the water quality impacts of a Legion Pond

discharge on Lake Elmo:


1. Construct a pumped outlet from Legion Pond to Lake Elmo. As a result, the Legion Pond

water level could be lowered below the low home elevation and below the elevation of the

septic systems. Water could also be pumped from Legion Pond when the Lake Elmo water

level is higher than the Legion Pond water level, assuming there is not an appreciable rise in

the Lake Elmo water level as a result. However, if pumping does not begin until the septic

systems are flooded, or if water levels rise above the elevation of the septic systems during

pumping, untreated or poorly treated sewage could enter Lake Elmo. In addition, there will

be annual expenses for operation and maintenance costs.

2. Construct a gravity outlet from Legion Pond to Lake Elmo. This option will prevent the

flooding of low homes around Legion Pond, but only when the Lake Elmo water level is

lower than Elevation 886. A gate or a valve would be required to prevent backflow of water

into Legion Pond when the Lake Elmo water level is higher than the Legion Pond water

level. This option will not prevent flooding of the septic systems around Legion Pond since

the outlet elevation of Lake Elmo is at 884.1.

3. Provide only emergency pumping relief. In this case, it is very likely that septic systems

would be flooded before pumping would be initiated. As a result, the water quality impacts of

such a pumping project would have to be investigated.

If detrimental water quality impacts would result from a Legion Pond discharge to Lake Elmo, other

options would be to discharge the water to the Horseshoe Lake outlet structure, to the Horseshoe

Lake drainage area, or to the Downs Lake watershed. Water quality (and quantity) impacts to these

water bodies would also need to be investigated prior to the initiation of any project.

The primary concern expressed by area residents and the City of Lake Elmo is the probability of high

water levels in subsequent years. Area residents and the City of Lake Elmo would like Legion Pond’s

water level maintained at a level which would avoid flooding problems for area residents.

Because of water quality concerns, it is unlikely that an outlet to Lake Elmo will be feasible unless a

communal drainfield system is constructed. Then any of the three solutions presented above might be

feasible. Another potentially feasible solution is to floodproof the homes, including re-locating their

septic systems. If flooding recurs in the Legion Pond area, the VBWD will consider assisting the City

of Lake Elmo to correct the situation. It is anticipated that the City of Lake Elmo will address this

problem when the City prepares its water management plan.

In 2003, Washington County contracted with the VBWD to develop a 100-year flood level for

Legion Pond that would be approved by the Federal Emergency Management Agency (FEMA). The

VBWD used a hydrologic and hydraulic model (XP-SWMM) to run a 50-year simulation of the water

levels of Legion Pond. A statistical analysis performed on the resulting annual high water levels to

determine the 1% probability flood level (i.e., 100-year flood level). The study determined 100-year

flood level of Elevation 888.7 (NAVD88 datum). The FEMA-established 100-year flood level for

Legion Pond is Elevation 889 (NAVD88 datum) and the floodplain is mapped on the Washington

County Flood Insurance Rate Map (FIRM) which became effective in 2010. Prior to this detailed


study, the VBWD used its 100-year annual runoff method to establish a 100-year flood level of

Legion Pond at Elevation 890.0 (see Section 4.7).

In 2013, the National Oceanographic and Atmospheric Administration (NOAA) published Atlas 14,

Volume 8 (see Section 4.7.6). Atlas 14 contains updated precipitation data for Minnesota and

supersedes data sources used to establish the VBWD and FEMA 100-year flood elevations within the

Legion Pond subwatershed. Over the next several years, the VBWD will update its hydrologic -

hydraulic modeling of major subwatersheds, including Legion Pond. Updated modeling will

incorporate the most recent precipitation data (see Section 4.7.7) which may increase 100-year flood

levels relative to the existing levels.

5.27.4 References

Barr Engineering Company. September 1995. Water Management Plan, Valley Branch Watershed

District.

Barr Engineering Company. December 2005. Valley Branch Watershed District Watershed

Management Plan.

Bonestroo, Rosene, Anderlik & Associates, Inc. 1976. Report on Potential Flood Damage for City of

Lake Elmo, Minnesota.

National Oceanographic and Atmospheric Administration (NOAA). 2013. Atlas 14 Precipitation-

Frequency Atlas of the United States – Volume 8.

!.!.

Lake Elmo

SunfishLake

LakeElmo

LegionPond

DownsLake

Baytown Township

West Lakeland Township

Lake

Elm

o Ave

N

Mann

ing A

ve N

30th St N

Lake ElmoAirport

FL-100 = 899NL = 892.5AF = 413OHW = 898.4

FL-100 = 891NL = 884(883)AF = 2700OHW = 886

FL-100 = 894NL = 880AF = 116

FL-100 = 888.7NL = 883.5AF = 175

FL-100 = 893NL = 887.6AF = 640OHW = 889.1

FL-100 = 917NL = 899AF = 230

Stillwater Blvd

SNF-1

FL-100 = 921

FL-100 = 893NL = 887.6AF = 640OHW = 889

DWN-5

EdenParkPond

Durand'sPond

HRS-18HRS-18 DWN-32 DWN-33 DWN-34

DWN-16

WLS-24

HRS-4

FL-100 = 901

DWN-8

456715

456717

456717

"5

82-106 P

82-107 P

82-110 W

82-461 W82-462 W

82-414 W

82-463 W

82-460 W

82-416 W

ELM-1

DWN-6

DWN-28

DWN-1

ELM-4

DWN-17

LEG-2

EPL-6

DWN-19

LEG-1

DWN-14

ELM-3

DWN-10

DWN-4

DWN-7

DWN-27

DWN-13

DWN-11

DWN-20

HRS-5

DWN-24

DWN-3

DWN-23DWN-22

ELM-7

DWN-12

DWN-31

SNF-3

DWN-25

DWN-36

SNF-2

DWN-21LEG-3

DWN-31

DWN-29

DWN-2

HRS-18 HRS-20

DWN-26DWN-28

24

13

23

14

19

18

2526 30Barr Footer: Date: 12/1/2005 5:12:33 PM File: I:\Client\Vbwd\District\Project\WtrshdPlan\Watershed_maps\27-LegionPond_Watershed.mxd User: lkp

Figure 5.27-1LEGION POND WATERSHED

Valley Branch Watershed District

1,000 0 1,000 2,000500

Scale in Feet

I

LEGEND

Project 1007Catch BasinManhole CoverOpen ChannelPipeMN-DOT Pipe

Overflow Path from Semi-Landlocked Watershed

Subwatershed Contributing RunoffOverflow Path from Landlocked Watershed(Non-Contributing Subwatershed)

Major Watershed DivideSubwatershed Divide

Lakes, Ponds, Wetlands,Approximate Normal Water Surface Level

VBWD Legal Boundary

LEG-1 Subwatershed Designation82-642W DNR Protected Waters Designation

Municipal Boundary

100 Year Flood LevelNL Normal LevelAF Acre Feet of Storage at 100 Year Flood Level

DNR Established Ordinary High Water ElevationOHW

Lakes, Ponds Wetlands, Approximate 100 Year Flood Surface Level

Legion Pond Watershed

Landlocked: Basin does not overflow using VBWD simplified method for calculating its 100-year flood level or using a more detailed analysis, such as the 1% probability flood level.

Semi-Landlocked: Basin does not overflow in the 100-year 24-hour rainfall total or the 100-year 10-day snowmelt event, but does overflow when calulating its 100-year flood level based on the VBWD simplified method or the 1% probablility flood level.

Section Lines

&-

!.

FL-100

5

456717

456715

456717

Mann

ing Av

e NLake

Elm

o Ave

N

33rd St N

32nd St N

24th S

t N30th St N

Stillwater Blvd N

Lisbon Ct

28th St NLe

gion L

a NLis

bon A

ve N

Legio

n Ave

N

31st St NLa

verne

Ave N

27th St N

Klond

ike Av

e N

Manning

Tr N

Upper 33rd St N34th St N

Lampert Ave NLangly Ct N

25th St N

35th St N

Lave

rne C

t N

30th

Stree

t Cir

Lisbon Ave N

33rd St N32nd St N

Legio

n Ave

N

1,000 0 1,000 2,000Feet

Figure 5.27-2LEGION POND WATERSHED

CURRENT (2010) AND FUTURE (2030) LANDUSE2015-2025 Watershed Management Plan


Barr Footer: ArcGIS 10.1, 2014-12-01 13:55 File: I:\Client\VBWD\District\Work_Orders\2015_Watershed_Mgmt_Plan\Maps\Reports\Draft_2015_Plan\Section05\Fig051_02_Silver Lake LandUse.mxd User: sgw

ICurrent (2010) Land Use

FarmsteadSeasonal/VacationSingle Family DetachedManufactured Housing ParkSingle Family AttachedMultifamilyRetail and Other Commercial

OfficeMixed Use ResidentialMixed Use IndustrialMixed Use Commercial and OtherIndustrial and UtilityExtractiveInstitutionalPark, Recreational or Preserve

Golf CourseMajor HighwayRailwayAirportAgriculturalUndevelopedWater

Legion Pond SubwatershedMajor Subwatershed BoundaryVBWD Legal Boundary

Source: Metropolitan Council 2010

5

456717

456715

456717

Mann

ing Av

e NLake

Elm

o Ave

N

33rd St N

32nd St N

24th S

t N

30th St N

Stillwater Blvd N

Lisbon Ct

28th St N

Legio

n La N

Lisbo

n Ave

N

Legio

n Ave

N

31st St N

Lave

rne Av

e N

27th St N

Klond

ike Av

e N

Manning

Tr N

Upper 33rd St N34th St N

Lampert Ave NLangly Ct N

25th St N

35th St N

Lave

rne C

t N

30th

Stree

t Cir

Lisbon Ave N

33rd St N32nd St N

Legio

n Ave

N

1 inch = 1,000 feet

Future (2030) Land UseAgriculturalRural or Large-Lot ResidentialSingle Family ResidentialMultifamily ResidentialCommercial

IndustrialInstitutionalMixed UseMulti-Optional DevelopmentPark and RecreationOpen Space or Restrictive Use

Rights-of-Way (i.e., Roads)Railway (inc. LRT)AirportVacant or UnknownOpen Water

Legion Pond SubwatershedMajor Subwatershed BoundaryVBWD Legal Boundary

Current (2010) Land Use Future (2030) Land Use

0.0

0.2

0.4

0.6

0.8

1.0

1.2

1.4

2000 2002 2004 2006 2008 2010 2012 2014

June‐Sept. Average

Secchi D

isk

Tran

sparency (m)

Legion Pond June‐Sept. Secchi Disk Transparency

MPCA D L k St d d

MPCA Shallow Lake Standard

0

10

20

30

40

50

60

70

80

2000 2002 2004 2006 2008 2010 2012 2014


Chlorophyll a (ug/L)

Legion Pond June‐Sept. Average Chlorophyll a


0

20

40

60

80

100

120

140

160

180

2000 2002 2004 2006 2008 2010 2012 2014


Total Phosphorus

(ug/L)

Legion Pond June‐Sept. Average Total Phosphorus


Figure 5.27‐3

Legion Pond Water Quality2015 ‐ 2025 Watershed Management Plan


876

878

880

882

884

886

888

8901

/1/2

00

8

1/1

/20

09

1/1

/20

10

1/1

/20

11

Ele

va

tio

n (

ft,

MS

L)

Date

Water Level 100-Year Flood Level

Figure 5.27-4

LEGION POND WATER LEVELS 2015 - 2025 Watershed Management Plan


Observed elevations in NGVD29 datum 100-year flood level in NAVD88 datum Water Surface Below Gage: 6/1/2009 and 6/15/2009 Pond is landlocked

Appendix A-5.27 Additional Macrophyte Information

N

LEGION POND

MACROPHYTE SURVEY

JUNE 13, 2003

NOT TO SCALE

WaterQuality

MonitoringLocation

P:2

3\8

2\2

07

\LA

KE

MA

CR

OP

HY

TE

MA

PS

\LE

GIO

NP

ON

D\2

00

3\J

UN

E2

00

3.C

DR

RL

G 0

3-2

5-0

4

Nuphar variegata

Sagittaria spp.

Typha spp.

Typha spp.

Nuphar microphyllum

Sagittaria spp.

Typha spp.

Nuphar microphyllum

Nuphar variegata

Typha spp.

Potamogeton praelongus 1-2

Potamogeton

amplifolius

Brasenia schreberi

Nuphar variegata

Sagittaria spp.

Nuphar microphyllum

Typha spp.

Typha spp.

Nitella spp. 3

Elodea canadensis 1

Ceratophyllum demersum 3

Nitella spp. 1

Ceratophyllum demersum 1-3

Utricularia spp. 1

Elodea canadensis 2-3

Typha spp.

Polygonum amphibiumSubmerged Aquatic Plants:

Common Name Scientific Name

Floating Leaf:

Emergent:

No Aquatic Vegetation Found:

Macrophytes Found Throughout Entire Water BodyMacrophyte Densities Estimated as Follows: 1 = Light; 2 = Moderate; 3 = HeavyNuphar Microphyllum Sporadic Along Entire Pond Edge, Heavier in Areas Marked on Map

Potamogeton praelongus

Potamogeton amplifolius

Ceratophyllum demersum

Elodea canadensis

Nitella spp.

Utricularia spp.

Najas spp.

Nuphar variegata

Nuphar microphyllum

Brasenia schreberi

Whitestem pondweed

Large-leaf pondweed

Coontail

Elodea

Stonewort

Bladderwort

Bushy pondweed and naiad

Yellow water lily

Little yellow water lily

Watershield

Tree stumps

Polygonum amphibium

Typha spp.

Sagittaria spp.

Eleocharis spp.

Water smartweed

Cattail

Arrowhead

Spikerush

Eleocharis spp. 1

Eleocharis spp. 1

Eleocharis spp. 1

N

LEGION POND

MACROPHYTE SURVEY

AUGUST 20, 2003

NOT TO SCALE

WaterQuality

MonitoringLocation

P:2

3\8

2\2

07

\LA

KE

MA

CR

OP

HY

TE

MA

PS

\LE

GIO

NP

ON

D\2

00

3\A

UG

US

T2

00

3.C

DR

RL

G 0

3-2

5-0

4

Nuphar variegata

Sagittaria spp.

Typha spp.

Typha spp.

Nuphar microphyllum

Sagittaria spp.

Typha spp.

Nuphar microphyllum

Nuphar variegata

Potamogeton praelongus 1-2

Potamogeton

amplifolius

Nuphar variegata

Sagittaria spp.

Nuphar microphyllum

Typha spp.

Typha spp.

Najas spp. 1

Nitella spp. 2-3

Elodea canadensis 1

Ceratophyllum demersum 3

Nitella spp. 1

Ceratophyllum demersum 2-3

Utricularia spp. 1

Elodea canadensis 2-3

Typha spp.

Polygonum amphibium

Sagittaria spp.

Submerged Aquatic Plants:


Floating Leaf:

Emergent:

No Aquatic Vegetation Found:

Macrophytes Found Throughout Entire Water BodyMacrophyte Densities Estimated as Follows: 1 = Light; 2 = Moderate; 3 = HeavyNuphar Microphyllum Sporadic Along Entire Pond Edge, Heavier in Areas Marked on Map

Potamogeton praelongus


Ceratophyllum demersum

Elodea canadensis

Nitella spp.

Utricularia spp.

Najas spp.

Nuphar variegata

Nuphar microphyllum

Brasenia schreberi

Whitestem pondweed

Large-leaf pondweed

Coontail

Elodea

Stonewort

Bladderwort

Bushy pondweed and naiad

Yellow water lily

Little yellow water lily

Watershield

Tree stumps

Polygonum amphibium

Typha spp.

Sagittaria spp.

Eleocharis spp.

Water smartweed

Cattail

Arrowhead

Spikerush

Eleocharis spp. 1

Eleocharis spp. 1

Eleocharis spp. 1

Eleocharis spp. 1

Typha spp.

Brasenia schreberi

Brasenia schreberi

Typha spp.

Utricularia spp. 1

Typha sp.

Typha sp.

Typha sp.

Typha sp.

Typha sp.

Nitella sp. - 3

Sagittaria sp.

Sagittaria sp.

Nuphar variegata

Nuphar variegata

Nuphar variegata

Nuphar variegata

Brasenia schreberi(sporadic)

Nuphar microphyllum

Nuphar microphyllum

Nuphar microphyllum

Brasenia schreberi - 3

Brasenia schreberi

Nuphar microphyllum


Sagittaria sp.Typha sp.

Polygonum sp.Scirpus fluviatilis

Elodea canadensis - 1-2Eleocharis sp. - 1Utricularia sp. - 1Ceratophyllum demersum - 1-3Nitella sp. - 1

Polygonum amphibium

Elodea canadensis - 1-2Nitella sp. - 3Utricularia sp. - 1

Eleocharis sp. - 1Ceratophyllum demersum - 1-2Elodea canadensis - 3Nitella sp. - 3

Typha sp.

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Imagery Source: 2006 AE

LEGION POND MACROPHYTESURVEY RESULTS

May 28, 2007Valley Branch Watershed District

FIELD NOTES:- Macrophyte densities estimated as follows: 1=light; 2=moderate; 3=heavy- Densities generally not noted for emergent and floating leaf plants- Macrophytes found throughout entire waterbody- Nuphar microphyllum sporadic along entire pond edge, heavier in areas marked on map

LegendEmergent PlantsFloating Leaf PlantsSubmerged Aquatic PlantsNo Aquatic Vegetation


Canada waterweed Elodea canadensisbladderwort Utricularia sp.coontail Ceratophyllum demersumlargeleaf pondweed Potamogeton amplifoliussmartweed Polygonum sp.stonewort Nitella sp.


little yellow pondlily Nuphar microphyllumspatterdock Nuphar variegatawatershield Brasenia schreberi


arrowhead Sagittaria sp.cattail Typha sp.river bulrush Scirpus fluviatilisspikerush Eleocharis sp.water knotweed Polygonum amphibium

Submerged Aquatic Plants

Floating Leaf Plants

Emergent Plants

Typha sp.

Typha sp.

Typha sp.

Typha sp.

Typha sp.

Nitella sp. - 3

Sagittaria sp.

Sagittaria sp.

Nuphar variegata

Nuphar variegata

Brasenia schreberi(sporadic)

Nuphar microphyllum

Nuphar microphyllum

Brasenia schreberi


Sagittaria sp.Typha sp.

Potamogeton amplifoliusScirpus fluviatilis

Eleocharis sp. - 1

Polygonum amphibium

Eleocharis sp. - 1-2Ceratophyllum demersum - 1-3Elodea canadensis - 2-3Nitella sp. - 1-2

Typha sp.

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June 4, 2009Valley Branch Watershed District

FIELD NOTES:- Macrophyte densities estimated as follows: 1=light; 2=moderate; 3=heavy- Densities generally not noted for emergent and floating leaf plants- Macrophytes found throughout entire waterbody- Nuphar microphyllum sporadic along entire pond edge, heavier in areas marked on map- Very low water level- Ranunculus repens found along shoreline (sporadic to dense in dry areas)

LegendDryEmergent PlantsFloating Leaf PlantsSubmerged Aquatic PlantsNo Aquatic Vegetation

1.5' Depth


Canada waterweed Elodea canadensislargeleaf pondweed Potamogeton amplifoliuscoontail Ceratophyllum demersumsmartweed Polygonum sp.stonewort (algae) Nitella sp.


little yellow pondlily Nuphar microphyllumspatterdock Nuphar variegatawatershield Brasenia schreberi


arrowhead Sagittaria sp.cattail Typha sp.Creeping buttercup Ranunculus repensspikerush Eleocharis sp.river bulrush Scirpus fluviatiliswater knotweed Polygonum amphibium



Emergent Plants

Typha sp.

Typha sp.

Typha sp.

Typha sp.

Typha sp.

Nitella sp. - 3

Sagittaria sp.

Sagittaria sp.

Nuphar variegata

Brasenia schreberi

(light densities)

Nuphar microphyllum

Utricularia macrorhiza


Sagittaria sp.

Typha sp.

Polygonum sp.

Scirpus fluviatilis

Carex comosa

Polygonum sp. - 2-3

Scirpus fluviatilis

Polygonum amphibium

Typha sp.

Nuphar variegata

Schoenoplectus acutus

Ceratophyllum demersum - 3

Utricularia macrorhiza - 1

Nitella sp. - 1

Nuphar variegata

Typha sp.

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June 13, 2013Valley Branch Watershed District

FIELD NOTES:- Macrophyte densities estimated as follows: 1=light; 2=moderate; 3=heavy- Densities generally not noted for emergent and floating leaf plants- Macrophytes found throughout entire waterbody- Nuphar microphyllum sporadic along entire pond edge, heavier in areas marked on map- Spirodela polyrhiza, Carex comosa, Scirpus fluviatilis was foundalong entire perimeter sporadically

Emergent Plants



No Aquatic Vegetation

3.5' Depth


Coontail Ceratophyllum demersum

Canada waterweed Elodea canadensis

Smartweed Polygonum sp.

Stonewort Nitella sp.

Largeleaf pondweed Potamogeton amplifolius

Common bladderwort Utricularia macrorhiza


Little yellow pondlily Nuphar microphyllum

Large duckweed Spirodela polyrhiza

Spatterdock Nuphar variegata

WatershieldBrasenia schreberi (very

light density)


Arrowhead Sagittaria sp.

Cattail Typha sp.

Hardstem bulrush Schoenoplectus acutus

Bristly sedge Carex comosa

River bulrush Scirpus fluviatilis

Water knotweed Polygonum amphib ium



Emergent Plants

list of tables list of figures - vbwd...list of appendices appendix a-5.27 additional macrophyte...

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