Truesdale lake lake management plan
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Truesdale Lake Lake Management Plan. Truesdale Lake Association South Salem, NY. Truesdale Lake Evaluation. Introduction to Land-Tech Consultants, Inc. Project overview Summary of findings Questions. Project Objectives. Conduct bathymetry study Collect sediment for analysis

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Truesdale Lake Lake Management Plan

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Truesdale lake lake management plan

Truesdale LakeLake Management Plan

Truesdale Lake AssociationSouth Salem, NY


Truesdale lake evaluation

Truesdale Lake Evaluation

  • Introduction to

    Land-Tech Consultants, Inc.

  • Project overview

  • Summary of findings

  • Questions


Project objectives

Project Objectives

  • Conduct bathymetry study

  • Collect sediment for analysis

  • Review Citizens Statewide Lake Assessment Program (CSLAP) Findings (monitoring since 1999)

  • Evaluate data and provide management recommendations


Watershed

Watershed

  • 83 Acre lakeCreated in 1927

  • Receives water from surface runoff and primary streams

  • Discharges to 200 ft wide dam with spillway

  • 2,380 Acre Watershed


Sediment

Sediment

  • 11+ feet deep

  • 0-1.5 ft sediment accumulated since 1956

  • Sediment

    68% Gray Sand

    29% Silt

    3% Gravel


Water quality

Water Quality

  • Class B water (recreation, fishing)

  • High phosphorous (0.018-0.084 mg/l)

  • High chlorophyll a (37.1 ug/l)

  • Secchi disk - average= 1.15 m

  • Eutrophic

  • High sediment phosphorous


Weed control

Weed Control

  • Curly-leaf pondweed (Potmogeton crispus)

  • Leafy pondweed (P. foliosus)

  • Filamentous algae

  • Nitella found in southern cove

  • Aquathol K and copper sulfate treatments

  • Effective control

  • Long use of copper sulfate (45 years) – concern

  • Recommend copper and fish monitoring


Summary of existing conditions

Summary Of Existing Conditions

  • High landscape, scenic and recreational values

  • Managed system

  • Sedimentation concerns

  • High phosphorous and chlorophyll a levels

  • Effective weed and algal control program


Recommendations

Recommendations

A -Shoreline Buffer

  • Install adequate shoreline vegetative buffers of native shrubs and grasses

  • 15-25 foot wide buffer

  • Slow down overland runoff

  • Uptake of nutrients – compete for nutrients


Vegetative buffer

Vegetative Buffer


Dense buffer

Dense buffer


Recommendations1

Recommendations

B – Aquatic buffer

  • Introduce rooted emergents along shoreline

    • Take up and compete for nutrients

    • Increase aesthetics

    • Create escape cover for fish


Typical plants

Typical Plants

  • Pickerel weed (Pontederia cordata)

  • Bur-reed (Sparganium sp.)

  • Three-square rush (Scirpus pugens)

  • Common arrowhead (Sagittaria latifolia)

  • Sweet flag (Acorus calamus)

  • Blue flag (Iris versicolor)

  • Soft rush (Juncus effusus)


Recommendations2

Recommendations

C – Fertilizer Use

  • Test soil for nutrient content

  • Apply minimal fertilizer based on nutrient needs

  • Water soluble – minimize use near open water and prior to heavy rain

  • Apply only needed amounts of phosphorous

  • Mulch grass clippings

  • Use organic slow release fertilizer

  • Apply annually


Recommendations3

Recommendations

D – Control Phosphorous Sources

  • Maintain septic systems

  • Discourage Canada geese use on lawns


Recommendations4

Recommendations

E – Address “Hot Spots”

  • #1 South end of lake – 18” discharge pipe

  • #2 Catch basin at Truesdale Lake Drive and Lakeshore Drive

  • #3 Beach along eastern shoreline

  • #4 Channel under Boway Road

  • #5 Inlet watercourse

  • #6 Discharge channel at western shoreline


Area 1

Area #1

  • Relocate end of pipe further from lake

  • Create plunge pool

  • Create semi-circular forebay in lake

  • Introduce aquatic vegetation

  • Provide routine maintenance (sediment removal)


Area 2

Area #2

  • Remove section of pipe and replace with vegetated channel

  • Construct a small sediment basin and install rip rap channel to lake

  • Routine maintenance (sediment removal, erosion repair)


Rip rap swale

Rip Rap Swale


Sediment basin

Sediment Basin


Area 3

Area #3

  • Clean out & vegetate southern channel

  • Construct settling basin and forebays

  • Remove un-used pipes

  • Riprap northern channel, add forebay

  • Introduce aquatic emergent vegetation

  • Repair eroded areas

  • Routine maintenance


Area 4

Area #4

  • Remove sand bars

  • Construct multiple sediment basins where accessible

  • Reconstruct channel – improve flow, protect from erosion, enhance appearance

  • Routine maintenance


Area 5

Area #5

  • Open up mouth

  • Construct crescent- shaped forebay

  • Deepen brook

  • Introduce aquatic emergents

  • Routine maintenance


Area 6

Area #6

  • Construct rip rap channel from pipe over steep slopes

  • Construct sediment basin in level area

  • Construct forebay in lake

  • Routine maintenance


Stone filter if needed

Stone Filter – if needed


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