National Dam Inspection Program. Lynchwood Lake Dam (NDI-ID Number PA-00773, DER-ID Number 45-38), Delaware River Basin, Clear Run, Monroe County, Pennsylvania. Phase I Inspection Report.
Abstract
Lynchwood Lake Dam is 1,685 feet long and 20 feet high at its maximum section. The dam has an irregular alignment and consists of a rock-filled, timber crib dam about 1,275 feet in length, flanked on each end with reaches of embankment. A dry, stone masonry wall is located along the downstream side of the timber crib section, and there is an earthfill section upstream from the timber crib. The main spillway is located in the timber crib section of the dam near the original stream bed location. It is a broad crested weir with three concrete steps. The auxiliary spillway consists of a reach of earthen embankment lined with concrete on its downstream side and with riprap on its upstream side. The crest is protected by vegetation. Based on visual inspection, available records, calculations, past operational performance, and according to criteria established for these studies, Lynchwood Lake Dam is judged to be unsafe, non-emergency, because the spillway capacity is rated as seriously inadequate. The existing spillways can pass only 14 percent of the Probable Maximum Flood (PMF) before general overtopping of the dam occurs.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jan 01, 1980
- Accession Number
- ADA082247