Rush Lake

On the LakeGrade scale Rush Lake grades a B, with clarity readings still being added and 20 µg/L of phosphorus placing it above the Minnesota median. Clarity, phosphorus, and chlorophyll-a all rate similarly, so there is no obvious single lever to pull on watershed management.

A TSI near 47 places Rush Lake in the mesotrophic band — moderate productivity, with seasonal swings between clearer spring water and richer late-summer conditions. 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. Rush Lake sits at rank 53 of 86 in Beltrami County, in the lower half of the local distribution.

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