National Program for Inspection of Non-Federal Dams. Trading Cove Pond Dam (CT 00237), Lower Thames River Basin, Norwich, Connecticut. Phase I Inspection Report.
CORPS OF ENGINEERS WALTHAM MA NEW ENGLAND DIV
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Trading Cove Dam is an earth embankment dam with vertical masonry walls along the upstream crest. The dam is 230 feet long and 29 feet high as measured above the stream bed. The spillway, which is located near the approximate center of the dam, discharges its flow directly into a culvert which passes through the dam. The outlet works, located near the left abutment of the dam, consists of a square concrete opening from which the grate has been removed. There is no controlling gate mechanisms for this outlet and its discharge point on the downstream slope of the dam has been blocked by riprap. As a result of the visual inspection and hydrologic and hydraulic computations, the dam is considered to be in FAIR condition. To assure the long term performance of this structure, a few items of concern require attention. The erosion of the downstream slope near the spillway walls must be repaired, tree and brush growth on both slopes must be cleared, the upstream wall should be regrouted and a trash rack and gate mechanism should be installed at the outlet structure. The maximum outflow capacity of the spillway before over-topping occurs is 2,300 cfs, which represents approximately 51 percent of the test flood outflow.
- Hydrology, Limnology and Potamology
- Civil Engineering