National Dam Inspection Program. Craft Pond Dam (NDI ID Number PA-01103, DER ID Number 64-27), Delaware River Basin, Branch of Lakeville Creek, Wayne County, Pennsylvania. Phase I Inspection Report

Abstract

Abstract : Based on available records, visual inspection, calculations, and past operational performance, Craft Pond Dam is judged to be unsafe, nonemergency, because the spillway capacity is rated as seriously inadequate. The recommended Spillway Design Flood (SDF) for the size and hazard classification of the dam varies between 1/2 of the Probable Maximum Flood (PMF) and the PMF. The selected SDF is the 1/2 PMF. The existing spillway will pass only about 23 percent of the Probable Maximum Flood (PMF) before overtopping of the dam occurs. It is judged that the dam could not withstand the depth and duration of overtopping that would occur for the 1/2 PMF. Failure of the dam would cause an increased hazard for loss of life downstream. Overall, the dam is in good condition. The maintenance of the dam is considered to be good; only a few minor maintenance deficiencies were observed. The other deficiencies observed were low spillway walls and an inoperable outlet works.