National Program for Inspection of Non-Federal Dams. West Hill Pond Dam (CT 00377), Connecticut River Basin, Barkhamsted, Connecticut. Phase I Inspection report.
CORPS OF ENGINEERS WALTHAM MA NEW ENGLAND DIV
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West Hill Pond Dam is an earth embankment about 200 ft. long and 10 ft. high, with a crest about 30 ft. wide carrying a local road. A combined drop inlet spillway and outlet tower structure in ashlar masonry near the upstream slope is connected to a 3 ft. by 1 ft. 6 in. box culvert under the dam, which carries outflows from both the spillway and an outlet controlled by a slide gate. The spillway is about 3 ft. wide, but the size of the outlet gate is not known. West Hill Pond is about 6,500 ft. long and has a surface at normal storage of 246 acres. The drainage area is about 742 acres or 1.16 square miles, and the normal storage is 1,640 acre-ft. Maximum storage at top of dam is 2,525 acre-ft. the size classification is thus intermediate. The dam appears to be in a generally good condition. Riprap on the upstream slope in the vicinity of the left abutement has been displaced, causing fairly extensive erosion. There are mature trees growing on both slopes of the embankment and the downstream channel is also considerably overgrown. In the vicinity of the outlet to the culvert under the dam, the channel is clogged with boulders and rocks. Spillway capacity is too small to handle any flood inflows floods are accommodated almost entirely by surcharge, which is sufficient to handle 75 of the full PMF test flood volume, is surcharge above spillway level is not encroached upon. The test flood would overtop the dam by about one ft.
- Hydrology, Limnology and Potamology
- Civil Engineering