National Program for Inspection of Non-Federal Dams. Chestnut Ridge Reservoir Dam (CT 00075), Housatonic River Basin, Bethel, Connecticut. Phase I Inspection Report.
CORPS OF ENGINEERS WALTHAM MA NEW ENGLAND DIV
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The project, built in 1910, consists of an earthfill dam and a separate earthfill dike with a spillway near its center. The spillway is a 22 foot long concrete sill with stop-planks and masonry training walls. The outlet works consist of a gatehouse with high and low level intakes to a 16 inch water supply main. The gate valve is operable. Based upon the visual inspection and its past performance, the project is judged to be in fair condition. No evidence was observed of instability in any component of the project. There is substantial seepage through the dam the retaining wall at the toe of the dam and the spillway training walls are in a state of disrepair and there is much vegetation on the dike and in the spillway approach and discharge channels. With the stopplanks in place, the spillway capacity is 270 cfs, which is equivalent to 37 of the routed test flood outflow.
- Hydrology, Limnology and Potamology
- Civil Engineering