Crooked Lake Comprehensive Management PlanSummary 2/24/09

Report Outline1. Executive Summary

2. Introduction

3. Watershed & Hydrologic Characteristics

4. Lake Characteristics

5. Public Participation & Perceptions

6. Organizations Roles & Goals

7. Rules, Regulations, & Standards affecting Lake Management

8. Issue Management Plans

9. Management Activity Summary Sheets

10. Agency Implementation Plans

Plan and Assessment Approach

Management Efforts & Constraints

Social Perceptions & DemandsPhysical Factors

Plan

Design Strategy

Implement

Monitor

Evaluate

Assess Progress

AdaptiveManagement

Full Plan Availability

www.cooncreekwd.org >Headlines > Draft Crooked Lake

Comprehensive Management Plan

Turbid and Clearwater States

Lathrop, WDNR

Shallow Lake 'Switches'Clear scientific understanding of forward

switch into turbid state

Unclear understanding of reverse switch back to healthy water quality

In-Lake Process Maintaining Turbid Water

Release phosphorus,Use O2 , sodecline in DO

Algae growth & Rough fishfavored

Plants die off &Decompose

Increased turbidity= Decreased light penetration

Identified Issues on 3/25/08Milfoil, weeds, invasive spp.

Water Clarity

Muck

Water Quality/Nonpoint pollution

Water Level

Garbage & Trash

Invasive Species Eurasian watermilfoil & Curly leaf pondweed

Habitat

Lake Characteristics

Invasive Species

Plants crowd surface

Navigation & recreation generally hindered

Nuisance Level

Invasive Species

Biomass >50 g dry wt/m2

Estimated Total Phosphorus load >1.7 lbs/acre

Nuisance Measures

Invasive Species Cost

20,9185,4645,3055,1505,000Plant Survey

DNR

50,00010,00010,00010,00010,00010,000Plant Restoration

18,5466,3666,1806,00020% Treatment

9,1364,6364,500Chemical Treatment

CLAA1

2,494661641605587WQ Monitor

12,5513,2783,1833,0903,000Plant Survey

CCWD

Total20132012201120102009ActivityAgency

1 CLAA funding for annual chemical treatment has been received in equal portions from the cities of Andover and Coon Rapids. The same funding strategy is envisioned for the 20% treatment.

Water Clarity Second most cited “improvement” needed One of three most important issues facing lake

0.0

1.0

2.0

3.0

4.0

5.0

6.0

7.0

8.0

9.0

10.0

75 77 79 81 83 85 87 89 91 93 95 97 99 2001 2003 2005

Year

Se

cch

i D

ep

th (

ft)

Water Clarity Cost

$1,019$270$262$247$240MonitorCCWD

Total20132012201120102009ActivityAgency

#3 Muck Third most cited issueSixth in issues to be addressed

Nature of shallow lake

Boat channel excavated 2008

core sample - Feb. 2008

MuckImplementation Strategy

Permit Review

Finance

Lead

Dredge Channel

LeadLake Cores

DNRCRAndoverCCWDCLAAACDMethod

#4 Nonpoint Source Pollution/Stormwater Management

8.5 mg/L daily avg5 mg/L daily avg

4 mg/L daily min

Dissolved Oxygen (DO)

< 11 – 2 Buffer strips established each year

Treatment of 32% of direct discharge

5.3 ft > 6 ftSecchi Disk Transparency

11.6 ug/L<15 ug/LChlorophyll-a

30 ug/L40 ug/LTotal Phosphorus (TP)

Current

1990-2006 Avg

GoalObjective

Nonpoint Source Pollution Costs

15,0005,0005,0005,000Rain Gardens

Andover

250250InspectCCWD

18,000-30,000

4,500-7,000

4,500-7,000

4,500-7,000

4,500-7,000

Buffer Strips

0-Stencil Storm-drains

CLAA

Total20132012201120102009ActivityAgency

#5 Water Levels

19692008

1974

Water Levels Lake Characteristics

Water Levels Costs

7,8751,5751,5751,5751,5751,575Ground Water Monitor

637135131127124120Lake Level Monitor

250250Dam Inspect

CCWD

Total20132012201120102009ActivityAgency

#6 Trash

& Garbage

Trash Costs

10,0005,0005,000Enforcement blitz

4,0001,0001,5001,500Increased frequency of garbage pick up

200200Install garbage cans and signage

Andover

Total20132012201120102009ActivityAgency

Partner Costs

52,80016,40013,70011,0005,7006,000Crooked Lake Area Assoc

148,70828,68525,67233,79238,88736,672Total

24,8265,9195,7924,7925,5512,772Coon Creek WD

28,0413,1833,0904,0008,8188,950Coon Rapids

43,0413,1833,0909,00013,81813,950Andover

Total20132012201120102009Agency

Coon Creek Watershed District

No new money until 2010

New commitment for mapping plant survey

Coon Creek Watershed District

24,8265,9195,7924,7925,5512,772Total

7,8751,5751,5751,5751,5751,575GroundWater

1,019270262247240MonitorWater Quality

2,494661641605587WQ Monitor

12,5513,2783,1833,0903,000GPS Plant Survey

Invasive Spp.

637135131127124120Lake Monitor

Water Levels

250250Inspect Dam

Total20132012201120102009ActivityIssue

Andover & Coon Rapids

No new money until 2011 for increased EWM treatment

Andover: Potential addition of curb cut rain garden project in Northwest quadrant of lake

Andover

10,0005,0005,000Enforce-ment blitz

15,0005,0005,0005,000Rain Gardens

Storm Water

9,2003,2003,0003,00020% Treatment

5,0002,5002,500Chemical Treatment

Invasive Species

43,4003,2003,0009,00014,00014,200Total

4,0001,0001,5001,500Increased garbage pick up

200200Garbage cans and signage

Trash

Total20132012201120102009ActivityIssue

Coon Rapids

10,0005,0005,000Enforce-ment blitz

9,2733,1833,0903,00020% Treatment

4,5682,3182,250Chemical Treatment

Invasive Species

28,0413,1833,0904,0008,8188,950Total

4,0001,0001,5001,500Increased garbage pick up

200200Garbage cans and signage

Trash

Total20132012201120102009ActivityIssue

Questions?

Thank you.

Coon Creek Watershed District

12301 Central Avenue NE, Suite 100

Blaine, MN 55434

763.755.0975

www.cooncreekwd.org