Thompson Oaks Targeted Stormwater Management and Wetland Restoration Project
Dakota County is partnering with the City of West St. Paul and the Lower Mississippi River Watershed Management Organization to implement a targeted comprehensive water quality improvement project within a diverse and underserved community within the south metro. The Thompson Oaks Municipal Golf Course (now closed) receives the largest volume of untreated stormwater flow and pollutant load within the City of West St. Paul. To be completed in conjunction with construction of the Dakota County River to River Regional Greenway trail, the proposed project converts 10 acres of the former municipal golf course to a regional stormwater treatment system and restores a former wetland and creek complex which was destroyed via filling of construction waste and other debris in the 1980s. The proposed stormwater treatment system features three hydrodynamic separators placed on trunk storm sewer lines that drain into the site, 8 acres of enhanced treatment wetlands, a native prairie stormwater infiltration area and stormwater reuse system, and the daylighting of 700 linear feet of a historical creek section buried in storm sewer for several decades. The project infiltrates an estimated 4.5 acre feet/year of treated stormwater from upstream legacy impervious surfaces created prior to the adoption of stormwater treatment standards, and reduces sediment and phosphorus loading to the lower Mississippi River and Lake Pepin by 94 tons and 228 pounds per year, respectively. The proposed project combines stormwater treatment, drinking water protection, and contaminated soil remediation with economic redevelopment, recreational opportunities, and shared green space amenities while fostering community education and public engagement on surface water and groundwater quality issues and solutions. The project will treat approximately 25% of the total impervious land area within the City and treats stormwater beyond what is required for proposed greenway trail and surrounding redevelopment.
[Projects and Practices 2020] (b) $16,000,000 the first year and $16,000,000 the second year are for grants to local government units to protect and restore surface water and drinking water; to keep water on the land; to protect, enhance, and restore water quality in lakes, rivers, and streams; and to protect groundwater and drinking water, including feedlot water quality and subsurface sewage treatment system projects and stream bank, stream channel, shoreline restoration, and ravine stabilization projects. The projects must use practices demonstrated to be effective, be of long-lasting public benefit, include a match, and be consistent with total maximum daily load (TMDL) implementation plans, watershed restoration and protection strategies (WRAPS), or local water management plans or their equivalents. A portion of this money may be used to seek administrative efficiencies through shared resources by multiple local governmental units. Up to 20 percent of this appropriation is available for land-treatment projects and practices that benefit drinking water.
Remove 94 tons of sediment/yr and 228 pounds of phosphorus/yr entering the lower Mississippi River and Lake Pepin, infiltrate and recharge aquifers by 4.5 acre feet annually, restore a former wetland complex, and daylight a historical creek.
LOCAL LEVERAGED FUNDS