National Dam Inspection Program. Cherry Valley Dam (NDI-PA-508, DER-63-56), Ohio River Basin, Racoon Creek, Washington County, Pennsylvania. Phase I Inspection Report.

摘要

The Cherry Valley Dam consists of an earth embankment approximately 475 feet long, with a maximum height of 33 feet from the downstream toe, and a crest width of 10 feet. The flood discharge facilities for the dam consist of a combined primary and emergency spillway located on the right abutment (looking downstream). The spillway structures consist of an approach channel, a concrete overflow section, a spillway discharge channel, and stilling basin. The overflow structure of the spillway is a 130-foot-long concrete ogee section located at an elevation approximately 7.5 feet below the dam crest. The flow from the overflow section discharges into a trapezoidal concrete discharge channel which terminates at a plunge pool at the toe level of the dam near the right abutment. The outlet works consist of a concrete intake tower and two 24-inch cast-iron pipes through the embankment located at the center of the dam. The pipes are encased in concrete through the embankment and are equipped with concrete cutoff collars. The pipes receive flow from the wet intake tower and discharge into the outlet works discharge channel near the downstream toe of the dam. Flow through the pipes is controlled by gate valves located in a concrete valve chamber at the downstream end. This outlet system constitutes the emergency drawdown facility for the dam.