Understanding Mississagagon Lake Dam
Mississagagon Lake is a head water lake and is located on Swamp Creek, a small tributary of Buckshot Creek that connects with the Mississippi River at Mud Lake. Mississagagon Lake is located in the Township of North Frontenac, and has the least impact on the overall system of the lakes in this area due to its very small drainage area and relatively small storage volume.
Mississagagon Lake Dam is a water control structure that is located at the outlet of Mississagagon Lake. The dam is a concrete capped rock filled timber crib weir, with a single sluice in the centre of the dam containing six 0.15 m x 0.15 m x 1.33 m stoplogs. Due to their size, the stoplogs are bolted together in two sets, one of 4 and one of 2. The dam is owned and operated by MVCA. The Mississagagon Lake Dam has a total drainage area of 22 sq km and a total storage volume of 490 ha m.
Seasonal Management Strategies
The stoplogs are replaced early in the spring to ensure summer target levels can be reached.
Water levels can not drop for six weeks once walleye spawning has begun.
Lake levels are targeted between 268.10 m and 268.30 m throughout the summer months, with virtually no flow being passed through the dam.
Fall / Winter
The fall drawdown on this lake begins after the Thanksgiving weekend, with all the stoplogs removed from the dam.
The drawdown is usually complete in two weeks with the lake normally reaching its minimum level of 267.60 m by early November.