Housatonic River Basin, Waterbury, Connecticut. East Mountain Reservoir Dam CT 00032. Phase I Inspection Report. National Dam Inspection Program.
CORPS OF ENGINEERS WALTHAM MA NEW ENGLAND DIV
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The dam, built in the late 1800s, consists of an earthfill embankment with a concrete corewall and two gate houses. The dam is 400 or - feet long and 12 feet wide at the top. The upstream slope is riprapped to the top of the dam and the downstream slope is covered with grass and has two 12 foot wide berms at elevations 683.8 and 673.8. The top of the dam has a crushed stone cover and at elevation 694.3 is 35 feet above the streambed of East Mountain Brook. A concrete corewall extends 375 feet along the axis of the dam with the top of the corewall 2.5 feet below the dam crest or at elevation 691.8. There are two gate houses, the service gate house at the right upstream end of the dam and the drain gate house at the downstream toe of the dam. The drain gate house contains the valves for the low-level drain outlet and the service gate house contains the facilities for an abandoned water supply line. There is no spillway or any other operational outlet facility other than the low-level outlet. The overall condition of the project appears to be good, however there are areas requiring maintenance and monitoring. No evidence of instability was observed in the dam or appurtenant structures. Based upon the visual inspection at the site, past performance and the lack of a spillway at the dam, the project is judged to be in fair condition. The low-level outlet has a capacity of 28 cfs with the reservoir level to the top of the dam, which is 3 of the routed test flood outflow.
- Civil Engineering