Minnesota Lake

Hennepin Lake


Hubbard County

From the Minnesota DNR:

Hennepin Lake is located one mile southeast of Becida in northern Hubbard County. Hennepin is a shallow lake with a surface area of 407 acres and a maximum depth of 14 feet. Except for one narrow hole, most of the lake is less than 5 feet in depth. There is a state-owned public access with an earthen ramp located on the west shore of the lake. Development on Hennepin is limited to the northern portion of the lake with the shoreline on the southern half of the lake undeveloped tax-forfeited land. Due to the shallow depth, Hennepin Lake is subject to periodic "winterkill". Winterkill usually happens during long winters with heavy snowfall. Oxygen production through photosynthesis is limited due to snow and ice blocking sunlight from penetrating the water column. At the same time decaying aquatic vegetation on the lake bottom uses oxygen, causing oxygen levels in the lake to drop. Shallow lakes with heavy aquatic vegetation growth are more likely to winterkill than are deep-water lakes. Gamefish such as largemouth bass, bluegill, and walleye are less tolerant of low oxygen levels than are bullheads and northern pike. Winterkills can be severe or just a partial kill depending on the severity of the oxygen depletion. Fish species and abundance in Hennepin has fluctuated with these winterkill events. Lakes that suffer from periodic winterkills often produce a "boom and bust" fishery. Fishing is generally poor for a few years after a winterkill, but if a lake such as Hennepin can go several years without a winterkill there can be exceptional fishing.



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