National Program for Inspection of Non-Federal Dams. Bristol Reservoir Number 4 Dam (CT 00364) Farmington River Basin, Harwinton, Connecticut. Phase I Inspection Report.
CORPS OF ENGINEERS WALTHAM MA NEW ENGLAND DIV
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Bristol reservoir No. 4 Dam is a storage reservoir for public water supply owned by the Bristol Water Department. The dam consists of an earth embankment structure with a maximum height of 40 feet, a top width of 8 feet and a total length of 970 feet including a 29.7 foot long concrete overflow spillway. The outlet works consist of a 20-inch cast iron pipe through the dam with an upstream gatehouse. Based on the visual inspection, the dam is judged to be in fair condition. Features that could affect the future integrity of the dam are the downstream seepage, trees growing adjacent to the downstream toe and in the auxiliary spillway channel, continued undermining of the spillway apron and continued deterioration of the outlet works endwall. The Test Flood inflow of 1,840 cfs results in a routed outflow of 1,410 cfs that would overtop the dam by 0.2 feet. The spillway capacity without flashboards in place is 760 cfs or 54 percent of the Test Flood routed outflow.
- Hydrology, Limnology and Potamology
- Civil Engineering