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.
The Contractor is scheduled to begin work in earnest for this water quality project within Rice Marsh Lake Park. The new water filtration structures will arrive and be installed later this week and early the following week. The arrival of the primary structures has been set for Thursday. A crane will be utilized to off-load and set the structures. This will impact Dakota Lane specifically near the area where the trail intersects with the street. The contractor is planning to utilize flaggers to maintain traffic flow when the street is impacted. Utility work within the park is also planned for next week.
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|Tentative Construction Start||November, 2021|
|Tentative Construction End||December 2021, Vegetation Restoration Spring 2022|