National Dam Inspection Program. Shangri-La Dam (NDI-PA-00248, PA-DER-15-295), Delaware River Basin, Broad Run, Chester County, Pennsylvania. Phase I Inspection Report,
Abstract
Shangri-La Dam is a homogeneous, impervious, earth embankment with a downstream layer of random fill. The dam is approximately 800 feet long with a maximum height of 32 feet and is provided with a vertical sand drain in the downstream section. The level of the reservoir is controlled by means of a rectangular, reinforced concrete, drop inlet spillway (service spillway) located near the right abutment(looking downstream). A 150-foot wide, grass covered spillway(emergency spillway) provides additional discharge capacity and is also located in the right abutment area. The dam was constructed to impound a reservior for recreational purposes. Examination of the results of the hydrologic and hydraulic analyses indicates that the spillway system (service and emergency spillway) is capable of passing the entire Probable Maximum Flood(PMF) without the dam being overtopped. The selected Spillway Design Flood for this Small size, High hazard structure is the PMF. Therefore, the spillway system is classified as Adequate. Based on visual observations (June 12, 1979), discussions with the Owner's representative, and review of the information obtained from the Pennsylvania Dept. of Environmental Resources, Shangri-La Dam appears to be in good condition. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Aug 01, 1979
- Accession Number
- ADA078886
Entities
People
- John J. Williams
Organizations
- O'Brien & Gere