Morrison Lake

On the LakeGrade rubric, Morrison Lake pulls an A: clarity at 12.0 ft and 13 µg/L of phosphorus put it in the top bracket for Minnesota. With clarity and phosphorus scored, the sub-grades cluster within a letter of each other, pointing to stable conditions rather than one specific stressor.

Mesotrophic conditions dominate at Morrison Lake: enough nutrients for a healthy fishery, not so much that algal blooms become a chronic problem. 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 40 graded lakes in Clearwater County, Morrison Lake sits at rank 14, above the county median.

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