A platform for research: civil engineering, architecture and urbanism
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National Dam Inspection Program. Sheppard Dam (NDI Number PA-00333, DER Number 1-71), Susquehanna River Basin, Adams County, Pennsylvania. Phase I Inspection Report
Based on the visual inspection, past performance and the available engineering data, the dam and its appurtenant structures appear to be in good condition. In accordance with the Corps of Engineers' evaluation guidelines, the size classification of this dam is small and the hazard classification is significant. These classifications indicate that the Spillway Design Flood (SDF) should be in the range of the 100 year flood to one-half the Probable Maximum Flood (PMF). The recommended SDF for this structure is the 100 year flood. The spillway capacity is adequate for passing the SDF peak inflow without overtopping the dam. The spillway, therefore, is considered to be adequate. Some recommendations presented for immediate action by the owner are: (1) that the tree trunk in the forebay area be removed; (2) that the sliding gate in the intake tower be maintained and operated on a regular basis to ensure its functioning in time of an emergency; (3) that the weed growth on the upstream slope and in the spillway outlet channel be removed on at least an annual basis; and (4) that a formal surveillance and downstream warning system be developed for use during periods of high or prolonged rainfall.
National Dam Inspection Program. Sheppard Dam (NDI Number PA-00333, DER Number 1-71), Susquehanna River Basin, Adams County, Pennsylvania. Phase I Inspection Report
Based on the visual inspection, past performance and the available engineering data, the dam and its appurtenant structures appear to be in good condition. In accordance with the Corps of Engineers' evaluation guidelines, the size classification of this dam is small and the hazard classification is significant. These classifications indicate that the Spillway Design Flood (SDF) should be in the range of the 100 year flood to one-half the Probable Maximum Flood (PMF). The recommended SDF for this structure is the 100 year flood. The spillway capacity is adequate for passing the SDF peak inflow without overtopping the dam. The spillway, therefore, is considered to be adequate. Some recommendations presented for immediate action by the owner are: (1) that the tree trunk in the forebay area be removed; (2) that the sliding gate in the intake tower be maintained and operated on a regular basis to ensure its functioning in time of an emergency; (3) that the weed growth on the upstream slope and in the spillway outlet channel be removed on at least an annual basis; and (4) that a formal surveillance and downstream warning system be developed for use during periods of high or prolonged rainfall.
National Dam Inspection Program. Sheppard Dam (NDI Number PA-00333, DER Number 1-71), Susquehanna River Basin, Adams County, Pennsylvania. Phase I Inspection Report
H. Jongsma (author)
1981
70 pages
Report
No indication
English