National Dam Inspection Program. Bear Rock Number 1 Dam (NDI I.D. Number PA-00439, DER I.D. Number 11-2), Ohio River Basin, Bear Rock Run, Cambria County, Pennsylvania. Phase I Inspection Report,
D'APPOLONIA CONSULTING ENGINEERS INC PITTSBURGH PA
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Bear Rock No. 1 Dam consists of an earth embankment approximately 560 feet long with a maximum height of about 26 feet from the downstream toe and a crest width of about 8 feet. The upstream and downstream faces and crest of the dam are covered with riprap. The flood discharge facilities of the dam consist of a stone masonry structure with a flow width of 58 feet. The discharge from the spillway flows into an unprotected discharge channel which follows the left side of the valley. A dike is provided along the right side of the spillway discharge channel to prevent flows towards the toe of the dam. The outlet facilities consist of a 16-inch cast-iron blow-off pipe and 10- and 12-inch cast-iron supply pipes. Based on the evaluation of the existing conditions, the condition of Bear Rock No. 1 Dam is considered to be unsafenonemergency due to the seriously inadequate spillway capacity 30 of PMF. The condition of the embankment is considered to be fair.
- Civil Engineering