Morgan Lake

On the LakeGrade scale Morgan Lake grades a B, with clarity at 8.6 ft and 13 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.

A TSI near 44 places Morgan Lake in the mesotrophic band — moderate productivity, with seasonal swings between clearer spring water and richer late-summer conditions. At only 10 ft deep, Morgan Lake is shallow — wind keeps the water column mixed and sediment resuspension drives phosphorus levels harder to manage. Morgan Lake is small — 44 acres alongside partial shoreline records — which makes it sensitive to even modest changes in watershed runoff or recreational pressure. Morgan Lake ranks 18 of 39 in Florence County — solidly in the upper half of the local distribution.

No invasive species are currently listed at Morgan Lake — the lake remains off the Wisconsin infested-waters roster. Bass fishing is part of the appeal: the species list runs to 1, anchored by largemouth and/or smallmouth bass. 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.