Bridget Lake

On the LakeGrade rubric, Bridget Lake pulls an A: clarity at 16.4 ft and phosphorus readings still being added put it in the top bracket for Wisconsin. The three sub-grades — clarity, phosphorus, and chlorophyll-a — track close together, so no single parameter is dragging the average.

The lake's low TSI puts it in oligotrophic territory — the cleanest of the four trophic classes, but also the most vulnerable to nutrient-driven shifts. The lake's maximum depth is not yet documented in state morphometric records — context for its physical structure remains limited. The lake's surface area is not consistently recorded across state datasets — physical context remains partial. Among the 77 graded lakes in Polk County, Bridget Lake ranks 18 — in the top quartile locally.

No invasive species are currently listed at Bridget Lake — the lake remains off the Wisconsin infested-waters roster. The state fisheries records do not list documented species for Bridget Lake, which usually reflects a lack of formal fisheries survey work rather than an empty lake. The grade is based on limited monitoring — fewer than three independent measurement years contribute, so future updates may shift the letter.