Perhaps ironically in this year of drought, the Flint’s Pond dam will be getting some rehab work this winter to make sure it can withstand a 50-year flood.
A hydraulic evaluation required by the Office of Dam Safety indicated that the dam would overtop during a 50-year flood because the current spillway is undersized, said Water Department Superintendent Greg Woods. When water overflows a dam beyond its spillway capacity, it erodes soil and other material whose weight holds the dam in place, putting it in danger of failure.
Construction signs on Sandy Pond Road and Baker Bridge Road will alert motorists to the fact that trucks and equipment will be entering and exiting via a temporary easement being constructed at 67 Sandy Pond Road to access the dam site, which is at the southeast corner of Flint’s Pond. Work could begin as soon as December, and while the contract calls for the work to be completed in 75 days, the contractor will probably have to return in the spring to finish work on the ground cover, Woods said.
The town’s water supply and water quality will not be affected by the work, mainly because the water level is so low, although engineering plans were developed under the assumption that Flint’s Pond was at normal capacity. The cost to the town will be $125,000.
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