Why doesn the City dredge Lake Michie and remove the accumulated sediment to make room to store more water when it rains?
The City has evaluated this option and determined it is not economically feasible. Estimates are that approximately 15 percent of the storage capacity may have been lost to sedimentation, requiring the excavation of about 3 million cubic yards. At a rate of about $25 per cubic yard to dig and dispose of the sediment, that would cost about $75 million. The City would recover only about 600 million gallons of storage capacity for that $75 million. Adding Teer Quarry provides 1.32 billion gallons of storage capacity for $15 million. Also, the sediment has been evaluated in the past and is not considered suitable for use as topsoil. View more water conservation tips.
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