National Dam Inspection Program. Elm Lake Dam, NDI-PA-00397, PA-DER-52-164, Delaware River Basin, York Creek, Pike County, Pennsylvania. Phase I Inspection Report.
Abstract
Elm Lake Dam (formerly York Lake Dam) is an earth embankment, approximately 1,500 feet in length with a maximum height of 28 feet. The dam impounds a reservoir with a surface area of 28 acres and a storage capacity of 215 acre-feet at normal pool. The top of the dam is 16 feet wide and the side slopes are 2.5 horizontal to 1 vertical (2.5H:1V). The embankment is composed of an impervious central core with an outer shell of rock and semipervious material. The central core is 10 feet wide at the top of the dam and has side slopes of 1.5H:V. A key trench of impervious material connects the base of the central core to underlying bedrock or impervious material. The centerline of the key trench is 10 feet upstream of the dam centerline. The key trench has a bottom width of 10 feet and sides slope 1H:1V to original ground. An 18-inch thick layer of riprap overlying a 6-inch base of crushed stone is placed on the upstream face for erosion control between elevations 1407 and 1413 (normal water surface is at elevation 1410). From the right abutment (looking downstream) to a point approximately 570 feet from the right abutment, a four-foot deep toe drain lies beneath a 3-foot thick sand filter at the base of the downstream shell. The toe drain, as designed, consists of a 6-inch porous concrete pipe surrounded by graded gravel or crushed stone with a top filter of sand and gravel and a bottom filter of graded sand.
Document Details
- Document Type
- Technical Report
- Publication Date
- Feb 01, 1979
- Accession Number
- ADA072228
Entities
Organizations
- O'Brien & Gere