Duck Lake

The LakeGrade rubric puts Duck Lake at a C: clarity at 6.2 ft, 34 µg/L of phosphorus, and a TSI of 53 signal an intermediate trophic state. The three sub-grades — clarity, phosphorus, and chlorophyll-a — track close together, so no single parameter is dragging the average.

Eutrophic conditions are the baseline here: clarity drops noticeably in late summer, and dissolved oxygen near the bottom can become a concern. 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. Duck Lake ranks 31 of 95 in Hennepin County — solidly in the upper half of the local distribution.

Duck Lake carries an invasive watermilfoil record — boat-launch decontamination and shoreline care matter more here than at uninfested lakes. The state fisheries records do not list documented species for Duck Lake, which usually reflects a lack of formal fisheries survey work rather than an empty lake. No formal public access is documented at Duck Lake — most use is by shoreline residents and their guests. The grade is based on limited monitoring — fewer than three independent measurement years contribute, so future updates may shift the letter.