National Dam Inspection Program. Lower Hemlock Dam (NDI-ID Number PA-00756, DER-ID Number 52-117) Delaware River Basin, Pike County, Pennsylvania. Phase I Inspection Report.
Abstract
Lower Hemlock Dam is a 420 foot long earthfill structure with a maximum embankment height of 15 feet. Plate IV, Appendix E, indicates a concrete core wall along the centerline of dam. The top of the dam is used as a public roadway and has a bituminous surface. The spillway is located near the left abutment of the embankment. A fish guard-screen is attached to the upstream side of the concrete ogee section. The roadway crosses the spillway discharge channel immediately downstream from the weir (Photograph 7, Appendix C). The bridge is a concrete slab deck structure supported on two piers and two abutment walls. The outlet control structure is constructed differently from that shown on Plate IV, Appendix E. It actually consists of a valve chamber with the valve located on the inside of the upstream wall. Water is discharged directly into the valve chamber and flows from there through a 24inch diameter outlet pipe under the embankment to the downstream toe. The valve chamber is covered with a large overhanging concrete slab and is accessible by a footbridge from the crest of the dam. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Jun 01, 1980
- Accession Number
- ADA087908