Mi47 Lake

Mi47 Lake earns an A — water clarity, phosphorus, and chlorophyll-a all rate among the best monitored waters in Door County. Clarity, phosphorus, and chlorophyll-a all rate similarly, so there is no obvious single lever to pull on watershed management.

The lake's low TSI puts it in oligotrophic territory — the cleanest of the four trophic classes, but also the most vulnerable to nutrient-driven shifts. 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. Among the 11 graded lakes in Door County, Mi47 Lake sits at rank 5, above the county median.

No invasive species are currently listed at Mi47 Lake — the lake remains off the Wisconsin infested-waters roster. The state fisheries records do not list documented species for Mi47 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.