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If inflow to the reservoir exceeds the gate's capacity, an artificial channel called an auxiliary or emergency spillway will convey water. Often, that is intentionally blocked by a fuse plug . If present, the fuse plug is designed to wash out in case of a large flood greater than the discharge capacity of the spillway gates.
The south end of the Red Mill Pond dam in Tecumseh is pictured Thursday. The Lenawee County Drain Commissioner's Office is preparing a repair and realignment project for the dam's auxiliary spillway.
An emergency spillway with fuse plug (bottom) and an auxiliary ogee spillway (top) at New Waddell Dam. A fuse plug is a collapsible dam installed on spillways in dams to increase the dam's capacity. The principle behind the fuse plug is that the majority of water that overflows a dam's spillway can be safely dammed except in high flood conditions.
Open channel spillways are dam spillways that utilize the principles of open-channel flow to convey impounded water in order to prevent dam failure. They can function as principal spillways, emergency spillways, or both.
The lower levels will allow crews to complete repair work for a concrete spillway for the Old Mill Pond, which has undergone years of repair work after a 2015 dam failure emptied the once notable ...
A secondary dam was also overtaken by flood waters. “This dam was deliberately built so that when water rises it activates an emergency ‘fuse plug’ spillway and follows an emergency path ...