Golden Lake Iron Enhanced Sand Filter - Treating Dissolved Phosphorus
Projects and Practices 2014
The iron enhanced sand filter retrofit will remove 21 pounds of dissolved phosphorus annually.
This project resulted in an estimated 27 lb. reduction of phosphorus per year
LOCAL LEVERAGED FUNDS
This project will install an iron enhanced sand filter (IESF) to restore water quality in Golden Lake. Golden Lake is within a fully developed area of the Twin Cities, surrounded by residential land use, and the focal point of a city park. The IESF will achieve 11% of the phosphorus reduction (21 lbs/yr) required for Golden Lake to meet State water quality standards, as identified in the approved Total Maximum Daily Load (TMDL). In addition, the IESF is the most cost-effective project identified in the Golden Lake Subwatershed Stormwater Retrofit Analysis and will provide treatment of dissolved phosphorus which is otherwise untreated and comprises approximately 44% of the total phosphorus in stormwater runoff to Golden Lake. The regional importance of this project is illustrated by support from the Anoka Conservation District, the City of Blaine, and the Rice Creek Watershed District.