National Dam Inspection Program. Mill Creek Number 2 Dam (NDI-735), Ohio River Basin, Mill Creek, Cambria County, Pennsylvania. Phase I Inspection Report.

摘要

The dam consists of an earth embankment approximately 520 feet long with a maximum height of 45 feet from the downstream toe. The combined primary and emergency spillway is located on the right abutment (looking downstream). The flow through the spillway is controlled by a broad-crested weir 82.5 feet wide and located at a level three feet nine inches below the dam crest. The spillway chute consists of a rectangular masonry channel which terminates in a stilling basin at the toe of the dam. Mill Creek No. 2 Dam is located approximately two miles above the mouth of Mill Creek, a tertiary tributary of the Conemaugh River, approximately three miles southwest of Johnstown in Yoder Township, Cambria County, Pennsylvania. Downstream from the dam, Mill Creek flows through a steep and narrow valley for about two miles where it joins Bens Creek, which in turn flows to Stoney Creek south of Johnstown. There are approximately 50 mobile homes and 30 homes in the lower one-mile reach of Mill Creek. It is estimated that in the event of failure there would be large loss of life and property damage, both in Mill Creek Valley and Bens Creek Valley and further downstream.