National Dam Inspection Program. Gilkerson Dam (NDI Number PA-01122 PennDER Number 65-8), Ohio River Basin, Unnamed Tributary to Beaver Run, Westmoreland County, Pennsylvania.
Abstract
Gilkerson Dam is classified as a 'Small' size - 'High' hazard dam. The dam was found to be in very poor overall condition at the time of the inspection. Hydraulic/hydrologic evaluations, performed in accordance with procedures established by the Baltimore District, Corps of Engineers, for Phase I Inspection Reports, revealed that the spillway will pass approximately 40 percent of the Probable Maximum Flood (PMF) before overtopping will occur. A spillway design flood (SDF) in the range of the 1/2 Probable Maximum Flood (1/2 PMF) to the PMF is required for Gilkerson Dam. The 1/2 PMF was chosen because the dam is on the low and end of the 'Small' size category. Because the total duration and maximum depth of overtopping during the 1/2 PMF (1.5 hours and 0.21 foot, respectively) did not meet the estimated limiting criteria for failure of the dam (2 hours and 1.0 foot), the spillway is assessed as 'inadequate' but not 'seriously inadequate'. It is recommended that the owner immediately initiate an engineering study to develop recommendations for remedial measures to reduce the overtopping potential of the dam.
Document Details
- Document Type
- Technical Report
- Publication Date
- May 01, 1980
- Accession Number
- ADA085240