Improving and Protecting Local Water Quality

165th Street Stormwater Improvementlegacy_logo_rgb

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.

Find out more about the Clean Water Fund Amendment.

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 will add a new wide stream buffer, rate control ponds and volume control practices to improve water quality.

Location map

Middle Creek location map

South Creek Restoration


In 2018, a project restored a tributary of South Creek, a DNR-designated trout stream, separating it from a City stormwater pond. The project benefits included improved water quality, habitat enhancement and fisheries protection.

Fact Sheet
In 2019, the City restored a channelized 1,400 linear feet of the stream. In addition, the project converted six acres of previously cropped land to native vegetation to act as a stream buffer and provide pollinator habitat.

Fact Sheet

Lake Monitoring and Studies


The 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.

Fact Sheets

Prevention and Control of Aquatic Invasive Species


The City combats the spread of aquatic invasive species (AIS) through:
  • Watercraft inspections at Lake Marion and Orchard Lake
  • Treatment of curlyleaf pondweed and Eurasian watermilfoil
  • Monthly targeted AIS searches
Fact Sheets

Rough Fish Management in East Lake


In 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.

In 2019, the City continued common carp monitoring efforts, and determined that fish were able to freely migrate into North Creek, a tributary of the Vermillion River. Goldfish, which also negatively impact water quality, were also found within the lake.

Fact Sheet