Kohlman Lake

A 84-acre shallow lake that has improved in water quality over the last decade.

Kohlman Lake is the first lake in the Phalen Chain of Lakes and is used for a variety of recreational purposes, including motor-boating, canoeing, fishing, picnicking, wildlife habitat and viewing. There is no direct public boat access to Kohlman Lake, although the lake can be accessed via Gervais Lake. While the drainage area that directly reaches the lake is just over 1,000 acres, the total area connected to the lake through Kohlman and Willow Creeks is about 7,500 acres.

Lake facts

  • Tributary area: 1,009 acres
  • Downstream waterbody: Gervais Lake
  • DNR code: 62‑0006P (click for LakeFinder data)
  • Surface area: 84 acres
  • Average depth: 4 feet
  • Maximum depth: 12 feet
  • MPCA designations: Shallow lake; impaired for excess nutrients and chloride
  • Accountable municipalities: Little Canada, Maplewood, Vadnais Heights, Ramsey County
  • Nutrient water quality classification: Impaired

Water Quality

The following graphs show the growing season average measurements in Kohlman Lake for chlorophyll-a, total phosphorus and secchi transparency. Kohlman Lake is sampled for water quality parameters every two weeks from May through September. It was listed as impaired for excess nutrients in 2002. A study was completed in 2007 that evaluated the water quality of the lake and developed implementation strategies to address the impairment. As you can see in the graphs, water quality has improved since that study was completed and the implementation efforts began.

Past Projects

Kohlman Lake

Kohlman Basin

This wetland system cleans storm water flowing to the Phalen Chain of Lakes.

Kohlman Creek

Iron Enhanced Sand Filter

Sand and steel keep phosphorous out of Kohlman Lake.

Gervais Lake, Keller Lake, Kohlman Lake, Lake Phalen

Lake Phalen Chain Carp Management

The Phalen Chain of Lakes: Groundbreaking carp research and effective management through a partnership with the University of Minnesota

Kohlman Creek

Kohlman Creek Bank Stabilization

This creek stabilization protects Kohlman Basin wetland and Kohlman Lake.