Spring Lake

The LakeGrade rubric puts Spring Lake at a C: clarity at 3.1 ft, 7 µg/L of phosphorus, and a TSI of 47 signal an intermediate trophic state. The lake's weakest score is on Secchi depth — the water looks more turbid than its phosphorus number alone would predict.

A TSI near 47 places Spring Lake in the mesotrophic band — moderate productivity, with seasonal swings between clearer spring water and richer late-summer conditions. 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. Within Hennepin County's 95 graded waters, Spring Lake sits at rank 19, near the top of the local distribution.

No invasive species are currently listed at Spring Lake — the lake remains off the Minnesota infested-waters roster. The state fisheries records do not list documented species for Spring Lake, which usually reflects a lack of formal fisheries survey work rather than an empty lake. No formal public access is documented at Spring Lake — most use is by shoreline residents and their guests. Ice-out has been recorded 6 times at Spring Lake, with a median around Mar 30. The grade is based on limited monitoring — fewer than three independent measurement years contribute, so future updates may shift the letter.