Tiedman Pond

On the LakeGrade rubric Tiedman Pond fails the cutoffs — a TSI of 96 and persistent algal pressure put it in the bottom tier.

Hypereutrophic conditions mean the lake is operating at the upper end of the productivity scale, with all the bloom risk that implies. The lake's maximum depth is not yet documented in state morphometric records — context for its physical structure remains limited. At 9 acres, Tiedman Pond sits below the Wisconsin median: a small water where shoreline activity has an outsized effect on water quality. Within Dane County's 21 graded lakes, Tiedman Pond ranks 13 — below the local median, though not at the bottom.

No invasive species are currently listed at Tiedman Pond — the lake remains off the Wisconsin infested-waters roster. The state fisheries records do not list documented species for Tiedman Pond, 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.