National Dam Inspection Program. Elmcrest Dam (NDI ID Number PA-00347, DER ID Number 35-142), Susquehanna River Basin, Tributary to Roaring Brook, Lackawanna County, Pennsylvania. Phase I Inspection Report
GANNETT FLEMING CORDDRY AND CARPENTER INC HARRISBURG PA
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Based on the criteria established for these studies, Elmcrest Dam is judged to be in fair condition. The recommended Spillway Design Flood SDF for the size and hazard classification of the dam varies between the 100-year flood and 12 of the Probable Maximum flood PMF. The selected SDF is the 12 PMF. The existing spillway will pass only about 40 percent of the PMF before overtopping of the dam occurs. The spillway capacity is rated as inadequate. The computed spillway capacity is, at best, a rough approximation. It is judged that there is a severe potential for collection of debris at the spillway which could reduce the spillway capacity considerably. The outlet works is only capable of discharging when the reservoir is above normal pool elevation. Access to the outlet works valve is judged to be unsuitable. No conditions of immediate concern were observed at the embankment.
- Hydrology, Limnology and Potamology
- Civil Engineering