National Program for Inspection of Non-Federal Dams. Greenville Dam (CT 00206), Thames River Basin, Norwich, Connecticut. Phase I Inspection Report.
CORPS OF ENGINEERS WALTHAM MA NEW ENGLAND DIV
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The Greenville Dam is a long stone-filled timber crib spillway structure with two earth embankments with vertical stone masonry facing forming the spillway abutments. The total length of the dam is 664 feet including the 400 feet timber crib spillway. The outlet works for the dam is a series of 6-10 ft. W x 10 ft. H gates leading to a downstream canal used for generating power at a downstream facility. This dam has a maximum height of 29.0 feet and was originally build in the year 1982. The dam was judged to be in FAIR condition. However, because the river stage at the time of the visual inspection was high, the assessment of the dam is based only on those visible portions that could be readily inspected. Those components were the abutment embankments and the outlet structure. The spillway could not be evaluated. Several items require attention to insure the long term performance of the dam. They include seepage at the left embankment, erosion at the toe of the left embankment, brush growth of the upstream face of the right embankment. Construction work at the left embankment has resulted in the temporary creation of a low area in that embankment crest. The routed Test Flood outflow for this dam is equal to the Probable Maximum Flood PMF or approximately 140,000 CFS and would overtop the dam by 6.2 feet. The maximum spillway discharge of 84,480 CFS represents 60 percent of the test flood outflow.
- Hydrology, Limnology and Potamology
- Civil Engineering