Lake Riley and Rice Marsh Lake Subwatershed Assessment
The Riley-Purgatory-Bluff-Creek Watershed District and the City of Eden Prairie are working together to implement projects to remove Lake Riley and Rice Marsh Lake from the impaired waters list. One key emerging issue is to evaluate potential internal phosphorous loading within stormwater ponds in the lakes? subwatersheds. This project will also use updated pond data from the city?s intensive pond inspection program to identify other phosphorus reduction opportunities. The proposed assessment will quantify formerly undocumented P loading to Rice Marsh Lake and Lake Riley.
The Riley-Purgatory-Bluff-Creek Watershed District (RPBCWD) and the City of Eden Prairie (City) are working together to implement projects to remove Lake Riley and Rice Marsh Lake from the impaired waters list. A primary objective in the RPBCWD's plan is to identify opportunity projects based on emerging science and additional assessment. One key emerging issue is to evaluate potential internal phosphorous loading within stormwater ponds in the lakes' subwatersheds. The adaptive management strategy proposed in this application will target opportunity projects to assess the contribution of internal loading in storm water ponds, an emerging issue in urban stormwater systems. This project will also use updated pond data from the City's intensive pond inspection program to identify other phosphorus reduction opportunities. The proposed assessment will quantify formerly undocumented P loading to Rice Marsh Lake and Lake Riley with the goal of protecting a previously completed in-lake sediment inactivation treatment and bolster an improving water quality history which has positioned Lake Riley on the verge of being delisted from the MPCA 303d list.
Annie Felix-Gerth
(c) $3,325,000 the first year and $4,275,000 the second year are for accelerated implementation, including local resource protection and enhancement grants and statewide program enhancements of supplements for technical assistance, citizen and community outreach, compliance, and training and certification.
Achieve an estimate 277 lb/yr of phosphorous in surface water through identification effective treatment of internal P loading within the subwatershed.
The grant funds funded the final subwatershed assessment to be completed for Lake Riley and Rice Marsh Lakes. The feasibility includes a list of possible practices as well as locations in order to achieve a 277 lb/yr reduction of total phosphorus for both lakes.
LOCAL LEVERAGED FUNDS