Lake Rebecca Water Quality Improvement Project

2010 Fiscal Year Funding Amount:
Outdoor Heritage Fund
Three Rivers Park District
Recipient Type: 
Non-Profit Business/Entity
Start Date: 
July 2009
End Date: 
June 2011
Activity Type: 
Counties Affected: 
Project Details:
2010 Fiscal Year
Legal Citation / Subdivision: 
ML 2009, Ch. 172, Art. 1, Sec. 2, Subdivision 5(e)
Appropriation Language 

$450,000 in fiscal year 2010 is to the commissioner of natural resources for an agreement with the Three Rivers Park District to improve the water quality in Lake Rebecca in Lake Rebecca Park Reserve in Hennepin County. A description of the activities to enhance fish habitat in Lake Rebecca must be provided as part of the required accomplishment plan.

Fiscal Year Funding Amount: 
Other Funds Leveraged: 
Direct expenses: 
Measurable Outcome(s) 

Restored 1 shallow lake

Project Overview

This project improved the water quality of Lake Rebecca in Lake Rebecca Park Reserve, and improved the fish habitat in the premier muskellunge brood stock lake in Minnesota. Water quality improvements were achieved through a combination of implementing manure management activities in the watershed to reduce phosphorus inflow to Lake Rebecca, control of the invasive species curly-leaf pondweed, and application of alum (aluminum sulfate) to reduce internal phosphorus loading. The in-lake phosphorus concentration, as of June 2011 was reduced to less than 40 ppb and the lake water clarity was improved to over three meters Secchi disk visibility. Visibility for game fish such as muskellunge, is significantly improved. Fewer than 70 acres of Curly-leaf pondweed were present in the lake in spring 2011 after three years of treatment. The habitat availability resulting form the decrease in the exotic curly-leaf pondweed population is being utilized by native aquatic macrophytes which are increasing in distribution and density.

Project Details

Final Accomplishment Plan Report:

Project Manager

Three Rivers Park District
12615 County Road 9