Rice Marsh Lake Water Quality Treatment Project
The City of Chanhassen is partnering with the Riley Purgatory Bluff Creek Watershed District to install a stormwater Best Management Practice (BMP) within Rice Marsh Lake Park. The BMP is called a Kraken Filter, and would be installed underground. Stormwater from the downtown Chanhassen area that drains to the lake would now pass through the system, which contains a series of chambers and various filters which would remove up to 63% of Total Phosphorus and 85% of Total Suspended Solids, both of which are pollutants which negatively impact the water quality within Rice Marsh Lake.
This project is a result of the Watershed District’s 2016 Use Attainability Analysis which identified the need for a water quality improvement project within the Rice Marsh Lake and Lake Riley. Many BMPs were analyzed and considered, such as an iron-enhanced sand filtration basin, a subsurface gravel bed wetland, and a modular wetland system.
December 22, 2021
Work has been completed for the season with the vast majority of the required effort being done. Traffic control will be picked up early next week. The construction fence will be left in place at the segment of trail coming off Dakota Lane, down into the park. The trail will be temporarily restored with gravel, until next spring, when it will be paved. Restoration and remaining punch list work will also take place in the spring.
December 8, 2021
The installation of the water filtration structures has been completed and work on the storm sewer is currently ongoing. Utility work is planned for the next two weeks in this area. The trail going through the park is currently closed to the east and west of the project where the trail is adjacent to the project limits. Please proceed with caution, look for signs, and avoid this area from 7:00 a.m. to 6:00 p.m. on weekdays and from 9:00 a.m. to 5:00 p.m. on Saturdays. During these hours if construction is ongoing there may be limited to no access on the trail and pedestrian traffic may not be able to travel through the park inside of the project limits.
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|Construction Start||November, 2021|
|Construction End||December, 2021|
|Vegetation Restoration|| Spring, 2022|