Crooked Lake Comprehensive Management Plan

Summary 3/23/09

Table of Contents1. Executive Summary

2. Introduction

3. Watershed & Hydrological Description

4. Lake Description

5. Public Participation

6. Organizations, Roles & Goals

7. Rules, Regulations, & Standards

8. Lake Issues

9. Management Activities

10. Implementation Plans

Plan Approach

Management factors

Social factorsPhysical factors

Plan

Design Strategy

Implement

Monitor

Evaluate

Assess Progress

AdaptiveManagement

Crooked Lake Status

Shallow & Urban

Water Quality = Good

∴Management = prevention of

turbid state

Issues

from March 2008 Public Workshop

1. Invasive Species

shallow lake qualities= good habitat

Eurasian water milfoil &

Curly leaf pondweed

1. Invasive Species $$

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

DNR

50,00010,00010,00010,00010,00010,000

Plant Restoration

18,5466,3666,1806,00020% Treatment

9,1364,6364,500Chemical Treatment

CLAA1

2,494661641605587WQ Monitor

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

CCWD

Total20132012201120102009

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.

2. Water Clarity 0.0

6.0

1976 86 92 96 2000 2003 2006Year

Sec

chi

Dep

th (

ft)

81

2. Water Clarity $$

1,019270262247240Monitor

Total20132012201120102009

3. Muck

Andover excavated Boat channel 2008

Nature of shallow lake

core sample February 2008

No cost to CCWD

3. Muck Implementation

Permit Review

Finance

Lead

Dredge Channel

LeadLake Cores

DNRAndoverCCWDCLAAMethod

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

4. Nonpoint Source Pollution $$

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

0Stencil Storm-drains

CLAA

Total20132012201120102009

5. Water Levels

dry 1969

dry 2008

wet 1974

5. Water Levels $$

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

637135131127124120Lake Level Monitor

250250Dam Inspect

CCWD

Total20132012201120102009

6. Trash & Garbage

Andover & CLAA

No cost to CCWD

Coon Creek Watershed District

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

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

1,019270262247240MonitorWater Quality

2,494661641605587WQ Monitor

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

Invasive Spp.

637135131127124120MonitorWater Levels

250250Inspect Dam

Total20132012201120102009

Crooked Lake Area Association

77,68216,36613,68011,0005,6366,000Total

25,00010,0007,5005,0001,0001,500Aquatic Plant Restoration

18,5466,3666,1806,00020% Treatment

9,1364,6364,500Chemical Treatment

EWM

18,000-30,000

4,500-7,000

4,500-7,000

4,500-7,000

4,500-7,000

Buffer Strips

(grants + Home-owner)

Storm

water

Total20132012201120102009

Andover

10,0005,0005,000Enforcement blitz

15,0005,0005,0005,000Rain GardensStorm Water

9,2733,1833,0903,00020% Treatment

4,5682,3182,250Chemical Treatment

Invasive Species

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

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

200200Garbage cans and signage

Trash

Total20132012201120102009

Coon Rapids

10,0005,0005,000Enforcement 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

Total20132012201120102009

Summary

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

Total20132012201120102009