Spring Lake

On the LakeGrade scale Spring Lake grades a B, with clarity at 8.0 ft and 20 µg/L of phosphorus placing it above the Wisconsin median. The lake's weakest score is on Secchi depth — the water looks more turbid than its phosphorus number alone would predict.

The lake sits in the mesotrophic zone — the band where most well-managed Wisconsin lakes fall. A maximum depth of 23 ft puts Spring Lake in the middle of Wisconsin's depth distribution. At 9 acres, Spring Lake sits below the Wisconsin median: a small water where shoreline activity has an outsized effect on water quality. Spring Lake ranks 5 of 19 in Manitowoc County — solidly in the upper half of the local distribution.

Eurasian watermilfoil is established at Spring Lake, which can dampen recreational access and pressure the native plant community. The fishery is bass-led, with 4 documented species across the lake's records. A documented public access point at Spring Lake makes the lake usable for shore fishing, paddle craft, and trailered boats. 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.