Double Lake

On the LakeGrade rubric Double Lake fails the cutoffs — a TSI of 78 and persistent algal pressure put it in the bottom tier. Clarity, phosphorus, and chlorophyll-a all rate similarly, so there is no obvious single lever to pull on watershed management.

The hypereutrophic status — TSI 78 — reflects sustained heavy nutrient loading from the surrounding watershed and frequent algal pressure. 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. Double Lake ranks 5 of 6 in Cottonwood County — at the lower end of the locally monitored distribution.

No invasive species are currently listed at Double Lake — the lake remains off the Minnesota infested-waters roster. The state fisheries records do not list documented species for Double Lake, which usually reflects a lack of formal fisheries survey work rather than an empty lake. A documented public access point at Double Lake makes the lake usable for shore fishing, paddle craft, and trailered boats. The grade is based on limited monitoring — fewer than three independent measurement years contribute, so future updates may shift the letter.