Deep Hole Lake

On the LakeGrade rubric, Deep Hole Lake pulls an A: clarity at 16.4 ft and phosphorus readings still being added put it in the top bracket for Wisconsin. Clarity, phosphorus, and chlorophyll-a all rate similarly, so there is no obvious single lever to pull on watershed management.

A TSI value of 37 puts Deep Hole Lake in the oligotrophic range, where biological productivity stays low and the water column remains clear. At only 10 ft deep, Deep Hole Lake is shallow — wind keeps the water column mixed and sediment resuspension drives phosphorus levels harder to manage. At 8 acres, Deep Hole Lake sits below the Wisconsin median: a small water where shoreline activity has an outsized effect on water quality. Deep Hole Lake ranks 3 of 32 in Langlade County, putting it in the upper tier of locally monitored lakes.

An invasive species record — Rusty Crayfish — has been logged at Deep Hole Lake; Wisconsin DNR maintains the official infested-waters list. 1 fish species are documented at Deep Hole Lake, a mixed warm-water community typical for Wisconsin lakes of this size. 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.