National Program for Inspection of Non-Federal Dams. Clam Lake Dam (MA 01052), Connecticut River Basin, Sandisfield, Massachusetts. Phase I Inspection Report.
CORPS OF ENGINEERS WALTHAM MA NEW ENGLAND DIV
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The dam is an earthfill embankment about 950 feet in length, and 94 feet in height, has a reinforced concrete principal spillway which is designed to maintain the recreation pool level and control the release of stored floodwater, and a 385 foot wide earth fill and earth excavated emergency spillway channel around the left abutment. No water is presently impounded by the dam because of serious deficiencies related to the soundness of the principal spillway structure and emergency spillway side slopes. The dam and appurtenances were found to be in POOR condition. The visual inspection indicated that the emergency spillway slopes are unstable, the downstream emergency spillway slopes have eroded, the principal spillway structure is failing at the transition, the pond drain intake structure is defective and the upstream and downstream slopes of the dam show erosion. Routing the test flood through the reservoir, with the initial pool level at the normal recreation stage, resulted in test outflow of 14,960 CFS which does not exceed the capacity of the spillways.
- Hydrology, Limnology and Potamology
- Civil Engineering