National Dam Inspection Program. Sharpe's Pond Dam (NDI I.D. PA-0888 DER I.D. 066-009) Susquehanna River Basin, Little Mehoopany Creek, Wyoming County, Pennsylvania. Phase I Inspection Report.
D'APPOLONIA CONSULTING ENGINEERS INC PITTSBURGH PA
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Based on the evaluation of the existing conditions, the condition of Sharpes Pond Dam is considered to be fair. No conditions were noted that would significantly affect the structural stability of the dam. The formal spillway facility, which consists of a three-foot-diameter drop inlet pipe, is considered to be vulnerable to blockage by debris during a flood and is, therefore, considered inadequate. Although a low area exists over the left abutment which may function as an emergency spillway, a need exists for the installation of a formal emergency spillway facility. Flood discharge capacity of the dam, including the flow over the left abutment, was evaluated according to the recommended procedure and was found to be approximately 10 percent of the Probable Maximum Flood PMF without overtopping the low spot on the main embankment. This capacity is less than the recommended one-half of the PMF, according to the size and hazard classification for the dam. Although the spillway capacity is less than 50 percent of the PMF, overtopping of the dam is not considered to constitute a major breach potential. Therefore, the spillway is classified to be inadequate, but not seriously inadequate.
- Hydrology, Limnology and Potamology
- Civil Engineering