National Dam Inspection Program. Dyers Run Number 3 Dam (NDI Number PA 00676 DER Number 54-038), Delaware River Basin, Schuykill County, Pennsylvania. Phase I Inspection Report,
Abstract
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 high. These classifications indicate that the Spillway Design Flood (SDF) should be in the range of one-half the Probable Maximum Flood (PMF) to the full PMF. The recommended SDF for this structure is one-half the PMF. The spillway capacity is adequate for passing only 8 percent of the PMF peak inflow without overtopping the dam. Possible failure of the structure will, however, not significantly increase the hazard downstream. The spillway is considered to be inadequate, but not seriously inadequate. Some recommendations presented for immediate action by the owner are: (1) that measures shall be taken to provide an adequate spillway capacity, (2) that the left forebay wall be repaired or replaced, (3) that the valves on the blow-off pipes be maintained and operated on a regular basis, and (4) that a formal surveillance and downstream warning system be developed for use during periods of high or prolonged rainfall.
Document Details
- Document Type
- Technical Report
- Publication Date
- Feb 01, 1981
- Accession Number
- ADA097343
Entities
People
- Hendrik Jongsma