Beasley Lake

On the LakeGrade rubric, Beasley Lake pulls an A: clarity at 65.6 ft and 15 µg/L of phosphorus put it in the top bracket for Wisconsin. Clarity, phosphorus, and chlorophyll-a all rate similarly, so there is no obvious single lever to pull on watershed management.

A TSI value of 30 puts Beasley Lake in the oligotrophic range, where biological productivity stays low and the water column remains clear. Beasley Lake reaches 47 ft at its deepest point — typical for Wisconsin mid-sized lakes, with seasonal stratification but limited cold-water refuge. Beasley Lake is small — 12 acres alongside partial shoreline records — which makes it sensitive to even modest changes in watershed runoff or recreational pressure. Among the 27 graded lakes in Waupaca County, Beasley Lake sits at rank 9, above the county median.

Beasley Lake is on the Wisconsin infested-waters list for zebra mussels — boaters should follow clean-drain-dry protocols when moving gear to or from the lake. Walleye are documented at Beasley Lake, one of 6 fish species on record for the lake. The grade is based on limited monitoring — fewer than three independent measurement years contribute, so future updates may shift the letter.