National Dam Safety Program. Martindale Dam (NDI Number PA-00444, PennDER Number 11-17), Ohio River Basin, Trout Run, Cambria County, Pennsylvania. Phase I Inspection Report.
Abstract
Martindale Dam, owned and operated by the Borough of Portage Water Authority, is classified as a 'Small' size - 'High' hazard dam. 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 dam, reservoir, and spillway will pass 16 percent of the Probable Maximum Flood (PMF) before overtopping of the dam occurs. A spillway design flood (SDF) in the range of the 1/2 Probable Maximum Flood (1/2 PMF) to the PMF is required for Martindale Dam. The 1/2 PMF was chosen as the SDF because the dam is on the low end of the 'Small' size category in terms of its storage and height. During the 1/2 PMF, the maximum depth and total duration of overtopping are 0.83 feet and 8.5 hours, respectively. Due to the relatively narrow crest width of the dam and the long duration of overtopping, it was judged that failure of the dam is likely during the 1/2 PMF. To assess the increase in damages downstream from the non-failure cases, the 1/2 PMF was routed through the dam and downstream for both conditions. It was determined that there would be a significant increase in economic damages and possible loss of life if the dam failed. The spillway is therefore categorized as being 'seriously inadequate.'
Document Details
- Document Type
- Technical Report
- Publication Date
- Aug 01, 1980
- Accession Number
- ADA091699