National Program for Inspection of Non-Federal Dams. Shenipsit Lake Dam (CT 00209), Hockanum River Basin, Vernon, Connecticut. Phase I Inspection Program.
CORPS OF ENGINEERS WALTHAM MA NEW ENGLAND DIV
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The Shenipsit Lake Dam is a granite stone masonry structure 70 feet long and 27 feet high. It has an emergency spillway, diversion conduit and an adjacent earth fill dike. Based on visual inspection, records available at the site and past operational performance, the dam is judged to be in fair condition. However, a review of the limited engineering data available reveals that there are areas of concern which must be corrected in order to assume the safety of the dam. The earth dike embankment as well as the masonry spillway have questionable structural capacity. The seepage of water into the Roosevelt Mills parking lot is of concern as a result, we feel this condition needs to be studied further. Based on selected size and hazard classifications, the Probable Maximum Flood PMF was selected to test the hydraulic adequacy of the spillway. It was determined that the spillway would pass only 16.5 percent of the peak discharge of such an event before overtopping of the dam would occur.
- Hydrology, Limnology and Potamology
- Civil Engineering