National Program for Inspection of Non-Federal Dams. Peat Swamp Reservoir Dam (CT 00088), Lower Housatonic River Basin, Seymour, Connecticut. Phase I Inspection Report.
CORPS OF ENGINEERS WALTHAM MA NEW ENGLAND DIV
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The dam consists of two types of embankments. The right portion, 202 feet in length, consists of a concrete core wall with up and downstream berms. The crest is 20 feet in width and side slopes are 2 horizontal to 1 vertical both up and downstream. The left portion, 318 feet in length, consists of concrete and rubble masonry core with up and downstream berms. The crest is 10 feet in width and side slopes are 2 horizontal to 1 vertical both up and downstream. The concrete ogee weir is 19 feet in length and is located adjacent to the left abutment. The spilling channel curves right and water flows into a culvert drop inlet for approximately 100 feet and exits into an aeration pond. In addition to normal runoff, from the forested undeveloped drainage area, there are four diversions from nearby brooks, which feed the reservoir. There is one 8 inch low level intake which exists directly into the drop inlet and one 12 inch feed to the aeration pond. There are two more reservoirs downstream in the two miles between Peat Swamp Reservoir and the City of Ansonia. Based upon the visual inspection at the site, review of available informaition and the past performance of the dam, the dam is judged to be in good condition. But the inspection did reveal numerous areas requiring minor maintenance. The spillway capacity is 600 cubic feet per second, which is in excess of 90 of the Test Flood. Peak inflow to the reservoir is 1600 cubic feet per second. Peak outflow test flood is 640 cubic feet per second with the dam being overtopped 0.10 feet. The spillway will pass nearly 90 of the Test Flood.
- Hydrology, Limnology and Potamology
- Civil Engineering