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National Dam Safety Program. Crescent Dam (Inventory Number NY 171). Mohawk River Basin, Saratoga County, New York. Phase I Inspection Report
Examination of available documents and a visual inspection of the dam did not reveal conditions which constitute an immediate hazard to human life or property. However, additional studies should be undertaken to further evaluate conditions affecting the dam. Additional hydrologic investigations are required to more accurately determine the site specific characteristics of the watershed. Computations establish the spillway capacity at 160,000 cfs. This capacity is 28% of the Probable Maximum Flood and 56% of the 1/2 Probable Maximum Flood. The spillway is inadequate to pass the 1/2 PMF without overtopping the dam. The westerly section, Dam B, is unstable under all of the loading conditions prescribed by the Corps of Engineers' screening criteria. Therefore, the spillway structure is determined to be seriously inadequate according to the Corps of Engineers' screening criteria. The dam break flood wave is adjudged to have a significant impact on the residential structures 1/2 mile downstream. The spillway is, therefore, seriously inadequate and the dam is assessed as unsafe, non-emergency. Additional structural investigations involving borings should be undertaken to determine the affect of uplift pressure on the base of the dam and provide further analysis of the structural stability of the dam.
National Dam Safety Program. Crescent Dam (Inventory Number NY 171). Mohawk River Basin, Saratoga County, New York. Phase I Inspection Report
Examination of available documents and a visual inspection of the dam did not reveal conditions which constitute an immediate hazard to human life or property. However, additional studies should be undertaken to further evaluate conditions affecting the dam. Additional hydrologic investigations are required to more accurately determine the site specific characteristics of the watershed. Computations establish the spillway capacity at 160,000 cfs. This capacity is 28% of the Probable Maximum Flood and 56% of the 1/2 Probable Maximum Flood. The spillway is inadequate to pass the 1/2 PMF without overtopping the dam. The westerly section, Dam B, is unstable under all of the loading conditions prescribed by the Corps of Engineers' screening criteria. Therefore, the spillway structure is determined to be seriously inadequate according to the Corps of Engineers' screening criteria. The dam break flood wave is adjudged to have a significant impact on the residential structures 1/2 mile downstream. The spillway is, therefore, seriously inadequate and the dam is assessed as unsafe, non-emergency. Additional structural investigations involving borings should be undertaken to determine the affect of uplift pressure on the base of the dam and provide further analysis of the structural stability of the dam.
National Dam Safety Program. Crescent Dam (Inventory Number NY 171). Mohawk River Basin, Saratoga County, New York. Phase I Inspection Report
J. B. Stetson (author)
1979
192 pages
Report
No indication
English