National Dam Inspection Program. Waynesburg Water Company Dam (NDI ID Number PA-195), Ohio River Basin, Wisecarver Run, Green County, Pennsylvania. Phase I Inspection Report.
D'APPOLONIA CONSULTING ENGINEERS INC PITTSBURGH PA
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The Waynesburg Water Company Dam consists of an earth embankment approximately 260 feet long with a maximum height of 33 feet from the downstream toe and a crest width of 17 feet. The flood discharge facilities for the dam consist of a combined primary and emergency spillway located on the left abutment looking downstream. The overflow structure of the spillway is a 55-foot-long concrete ogee section located at an elevation approximately 6 feet below the dam crest. The flow from the overflow section discharges into a rectangular concrete discharge channel which terminates at a plunge pool at the toe level of the dam near the left abutment. The outlet works consist of a 16-inch cast-iron combined blow-off and supply pipe located near the left abutment. Based on the evaluation of the conditions as they existed on the dates of inspection and as revealed by visual observations, the condition of the Waynesburg Water Company Dam is assessed to be good. According to the recommended criteria, the spillway capacity 30 percent PMF is classified as seriously inadequate because it will not pass the recommended spillway design flood of half to full probable maximum flood PMF without overtopping, and it was judged that failure of the dam resulting from overtopping would significantly increase the downstream hazard of loss of life compared to the hazard which would exist just before failure.
- Civil Engineering