Improving and Protecting Local Water Quality
Lakeville Environmental Resources partners with local entities to implement water quality protection and enhancement projects within the City including stream restorations, stormwater improvements, lake health monitoring and aquatic invasive species prevention. Funding for projects comes from sources including (but not limited to): Clean Water Fund grants administered by the Board of Water and Soil Resources, Conservation Partners Legacy grants administered by the Department of Natural Resources, and Aquatic Invasive Species grants administered by Dakota County. Below are examples of keystone projects implemented since 2018, as well as additional annual water quality protection and enhancement efforts.
North Creek Restoration
Significant channel erosion in North Creek has resulted in an abrupt step in the channel’s profile east of Highview Avenue, threatening to undermine the road and recreational trail. In winter of 2022, the City will begin restoration of 1.1 miles of North Creek from Highview Avenue to Cedar Avenue. This partnership project with the Vermillion River Watershed will improve the stream by stabilizing eroded channel banks, reconnecting the channel to its adjacent floodplain and wetlands, and improving water quality through nutrient load reduction.
165th Street Stormwater Improvement
In 2021, the City was awarded $250,000 for water quality retrofits to an existing City stormwater pond located south of 165th Street between Kenrick and Kentucky Avenues. Funds are being directed from the Board of Water and Soil Resources’ Watershed Based Implementation Funding (as part of the Clean Water Legacy Amendment). The project will result in reduced sediment and phosphorus load to area waters and will help slow the flow of water during 10-year and larger storm events.
Middle Creek Restoration
In 2020, the City began restoration of 1 mile of stream near the intersection of Dodd and Highview within the Pinnacle Reserve development. This stretch of Middle Creek has historically been characterized by eroding banks and defined channel incision. Coupling the restoration with new development has added a new wide stream buffer, rate control ponds and volume control practices to improve water quality. The restoration was completed in 2021.
South Creek Restoration
Lake Monitoring and StudiesThe City conducts annual lake studies on Lake Marion, Lee Lake, Kingsley Lake, Orchard Lake, East Lake and Valley Lake. These studies help to develop innovative water quality enhancements, develop an ongoing database for long-term monitoring and helps to initiate rapid response for aquatic invasive species.
Prevention and Control of Aquatic Invasive SpeciesApproximately 8% of Minnesota waters are infested by aquatic invasive species. The City combats the spread of AIS through:
- Watercraft inspections at Lake Marion and Orchard Lake
- Treatment of curlyleaf pondweed and Eurasian watermilfoil
- Monthly targeted AIS searches
Rough Fish Management in East LakeIn 2018, the City of Lakeville estimated the biomass of common carp in East Lake. Carp abundance was found to be above 100 kg/ha, which is the threshold at which negative water quality impacts are observed. In addition, tracking devices were installed to determine if carp were able to freely travel outside of the lake. In 2020, the City sponsored a feasibility study to evaluate design alternatives for physical and electrical carp barriers. The study found that the most cost-effective option was a low-voltage electric barrier.