Allie Lake

Allie Lake earns an F: 232 µg/L of phosphorus and clarity at 2.0 ft signal heavy nutrient loading from the surrounding watershed. Sub-grades cluster within a single letter of each other, which usually means the lake is in stable trophic balance rather than fighting one specific stressor.

Hypereutrophic conditions mean the lake is operating at the upper end of the productivity scale, with all the bloom risk that implies. At only 12 ft deep, Allie Lake is shallow — wind keeps the water column mixed and sediment resuspension drives phosphorus levels harder to manage. Allie Lake covers 509 acres alongside 4.6 miles of shoreline — a mid-sized water that supports a working fishery without being so large that conditions diverge between basins. Within the 2 graded lakes of Renville County, Allie Lake sits at rank 2, near the bottom of the county list.

No invasive species are currently listed at Allie Lake — the lake remains off the Minnesota infested-waters roster. The fishery includes walleye alongside the lake's other 13 documented species — a notable draw for Minnesota anglers. Public access is available — the lake is on the Minnesota PCA public-access list. The lake has a partial ice record — 10 observed ice-outs, centered near Mar 31. The grade is supported by multiple sampling years from Minnesota PCA volunteers and partner agencies, giving the letter a reasonably stable foundation.