Flowage Lake

Flowage Lake earns a D — measurements through 2024 show persistent nutrient pressure that limits clarity through the summer. The lake's weakest score is on Secchi depth — the water looks more turbid than its phosphorus number alone would predict.

At a TSI of 64, Flowage Lake reads as eutrophic — nutrient-rich enough that summer algal growth and reduced clarity are expected, not unusual. 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. Flowage Lake ranks 45 of 53 in Aitkin County — at the lower end of the locally monitored distribution.

No invasive species are currently listed at Flowage Lake — the lake remains off the Minnesota infested-waters roster. The state fisheries records do not list documented species for Flowage Lake, which usually reflects a lack of formal fisheries survey work rather than an empty lake. A documented public access point at Flowage 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.