Finberg Lake

On the scoring rubric Finberg Lake grades a D: clarity at 6.0 ft and phosphorus readings still being added keep it in the lower bracket for St. Louis County. The three sub-grades — clarity, phosphorus, and chlorophyll-a — track close together, so no single parameter is dragging the average.

A TSI in the eutrophic range signals a lake doing what nutrient-loaded waters do — supporting an active algal community at the cost of clear water. The lake bottoms out at 18 ft — a moderate depth that supports a warm-water fishery without the year-round cold refuge a deeper basin provides. Finberg Lake covers 139 acres alongside 2.8 miles of shoreline — a mid-sized water that supports a working fishery without being so large that conditions diverge between basins. Finberg Lake ranks 162 of 187 in St. Louis County — at the lower end of the locally monitored distribution.

No invasive species are currently listed at Finberg Lake — the lake remains off the Minnesota infested-waters roster. The state fisheries records do not list documented species for Finberg Lake, which usually reflects a lack of formal fisheries survey work rather than an empty lake. The lake lacks a documented public access point, so visitor use is limited. The grade is based on limited monitoring — fewer than three independent measurement years contribute, so future updates may shift the letter.