National Dam Inspection Program. Claysville Number 1 Dam. NDI Number PA-00491, PennDER Number 63-35. Ohio River Basin, Branch of Dutch Fork, Washington County, Commonwealth of Pennsylvania. Phase I Inspection Report,
Abstract
Claysville No. 1 Dam is classified as a 'High' hazard - 'Small' size dam. The dam and reservoir, owned by the Claysville-Donegal Municipal Water Authority, are used for water supply. The dam was found to be in fair overall condition at the time of 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 35 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 Claysville No. 1 Dam. The PMF was chosen because an elementary school is located within the floodplain 900 feet downstream from the dam. Because the duration and depth of overtopping under the 1.2 PMF (2.83 hours and 0.59 foot, respectively) did not meet the 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
- Mar 01, 1980
- Accession Number
- ADA085226
Entities
People
- John A. Dziubek