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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
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