District Waterbodies

Forest Lake

Comfort Lake

Little Comfort Lake

Bone Lake

Moody Lake

Birch Lake

School Lake

Sylvan Lake

Shields Lake

 

 

Birch Lake Quick Facts

 

Lake Size: 33 acres

Watershed Drainage Area: 1,890 acres; land cover includes wetland, forest, cropland and grassland.

Maximum Depth: 8 ft.

Outlet Elevation: 894.5 ft.

Low Water Level: N/A

High Water Level: N/A

Impairments: Not listed as impaired (does not qualify as a lake)

Invasive Species (2015): curly-leaf pondweed

Water Quality (2007)

Eutrophic, Lake Grade: C

Summer average total phosphorus: 60 μg/L

Summer average Secchi disc: 1.71 meters

Summer chlorophyll-a: 21 μg/L

 

Resource Goals

Short Term Goals - Year 2020

  • Maintain a water quality rating of C.
  • Achieve a five-year mean summer phosphorus concentration at or below 60 μg/L ± 4%.
  • Maintain a mean summer secchi depth no less than 3.3 ft.

Long Range Goals - Year 2030

  • Maintain a water quality rating of C.
  • Achieve a five-year mean summer phosphorus concentration at or below 60 μg/L ± 4%.
  • Maintain a mean summer secchi depth no less than 3.3 ft

Long Range Goals - Year 2040

  • Maintain a water quality rating of C.
  • Achieve a five-year mean summer phosphorus concentration at or below 60 μg/L ± 4%.
  • Maintain a mean summer secchi depth no less than 3.3 ft.

 

Birch Lake

Birch Lake has a surface area of 32 acres and is two miles downstream of Bone Lake. Nielsen Lake's landlocked watershed discharges groundwater flow towards Birch Lake. Birch Lake is considered a shallow lake or wetland with 100% littoral area shallow enough to support emergent and submerged aquatic plants. Birch Lake is identified in name as a lake but was determined by the State to be a wetland due to its physical characteristics. Therefore it is not listed for a water quality impairment. The lake has been identified by CLFLWD to be a key factor influencing the water quality of School Lake and Little Comfort Lake. A survey in 2008 identified a diverse plant population in Birch Lake with little curly-leaf pondweed present.