Keyes Lake

On the LakeGrade rubric, Keyes Lake pulls an A: clarity at 68.9 ft and 11 µg/L of phosphorus put it in the top bracket for Wisconsin. Sub-grades cluster within a single letter of each other, which usually means the lake is in stable trophic balance rather than fighting one specific stressor.

A TSI value of 27 puts Keyes Lake in the oligotrophic range, where biological productivity stays low and the water column remains clear. 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 Florence County's 39 graded waters, Keyes Lake sits at rank 9, near the top of the local distribution.

No invasive species are currently listed at Keyes Lake — the lake remains off the Wisconsin infested-waters roster. The state fisheries records do not list documented species for Keyes Lake, which usually reflects a lack of formal fisheries survey work rather than an empty lake. Monitoring depth is thin here: the LakeGrade rubric is applied to a small number of sample years, and the grade will be revised as more data accumulates.