National Dam Inspection Program. Mammoth Lake Dam (NDI ID Number PA-466, DER ID Number 65-130), Ohio River Basin, Sewickley Creek, Westmoreland County, Pennsylvania. Phase I Inspection Report,
Abstract
Based on the evaluation of the conditions existing April 9 and May 25, 1979, the condition of Mammoth Lake Dam is considered to be good. The only two conditions noted which would require attention at this time are the filling of the erosion ditches on each side of the spillway structure and cleaning the debris from the outlet works discharge structure. The flood discharge capacity of Mammoth Lake Dam was found to be within the recommended capacity range of the 100-year flood to one-half of the probable maximum flood (PMF) relative to its size and hazard classification. Considering the 15-foot height of the dam is within the middle one-third of the zero to 25-foot height size classification range, the spillway capacity of 4770 cfs is rated to be adequate.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jun 01, 1979
- Accession Number
- ADA078969
Entities
People
- Lawrence D. Andersen