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National Program for Inspection of Non-Federal Dams. American Can Company Dam (CT 00047), Southwestern Coastal Basin, Greenwich, Connecticut. Phase 1 Inspection Report.
CORPS OF ENGINEERS WALTHAM MA NEW ENGLAND DIV
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The dam at the American Can Company building in Greenwich, Connecticut, consists of the north wall of a parking garage which retains earth and the adjacent created pond North Lake to a depth of five levels below grade. The height of this wall is 53 feet. There are no visible signs of physical distress and for reasons of fire protection, the water level is monitored very closely. Based on the visual inspection and a review of the technical data available, this dam is judged to be in good condition. This dam is classified as intermediate in size and a high hazard structure in accordance with the recommended guidelines established by the Corps of Engineers. The test flood for this dam is equal to the Probable Maximum Flood PMF and has an overflow discharge equal to 83 cfs. The maximum outflow capacity of the overflow weir under a stillwater condition at the top of the weir opening is equal to 500 cfs, which represents more than 100 percent of the test flood. Rebuilding the headwall at the 48 inch outfall pipe is recommended within a 2 year period so that sedimentation buildup at this location can be monitored and clogging prevented.
APPROVED FOR PUBLIC RELEASE