Jacks Lake

On the LakeGrade rubric, Jacks Lake pulls an A: clarity at 26.2 ft and phosphorus readings still being added 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 30 puts Jacks Lake in the oligotrophic range, where biological productivity stays low and the water column remains clear. The lake's 55 ft maximum depth is in the upper tier for Wisconsin — deep enough for cold-water fish to find refuge in summer. The lake is compact at 19 acres, with partial shoreline records and little volume to buffer nutrient inputs. Among the 16 graded lakes in Chippewa County, Jacks Lake sits at rank 7, above the county median.

Jacks Lake has no invasive species recorded in Wisconsin state databases as of 2024, though prevention practices still apply at all access points. The fishery is bass-led, with 2 documented species across the lake's records. 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.