National Dam Inspection Program. Raven Run Dam Number 2 (NDS ID Number PA-663 DER ID Number 54-7) Susquehanna River Basin, Lost Creek, Schuylkill County, Pennsylvania. Phase I Inspection Report,
KIMBALL (L ROBERT) AND ASSOCIATES EBENSBURG PA
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Raven Run Dam No. 2 is an earth and rockfill dam, 462 feet long and 37 feet high. The crest width of the dam is 8 feet. The spillway is located on the right abutment and consists of a rectangular shaped weir formed by stone masonry walls on both sides. The weir is 60 feet long. The spillway exit channel discharges on the right hillside below the toe of dam. The outlet conduit consists of a 24 inch or a 36 inch cast iron pipe under the earth embankment. Upstream of Raven Run Dam No. 2 is Raven Run Dam No. 3. All flows from Raven Run Dam No. 3 discharge into Raven Run No. 2 Reservoir. The spillway and reservoir are capable of controlling the PMF. Based on criteria established by the Corps of Engineers, the spillway is termed adequate. The seepage exiting below the toe of the dam should be monitored at regular intervals. In addition, a subsidence investigation should be conducted to determine the effects of past and present mining beneath the structure.
- Civil Engineering