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 (2017)

Eutrophic, Lake Grade: C+

Summer avg total phosphorus: 72 μg/L

Summer average Secchi disc: 5.0 ft

Summer chlorophyll-a: 10.9 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.