National Dam Inspection Program. Pond Number 4 Dam (NDI Number PA 00851, Penn DER Number 32-81), Ohio River Basin, Yellow Creek, Indiana County, Pennsylvania. Phase I Inspection Report
Abstract
Pond No. 4 Dam is classified as a 'small' size, 'significant' hazard dam, with a recommended 1/2 PMF (Probable Maximum Flood) spillway design flood. Based on the review and evaluation of available design information and visual observations of conditions as they existed on the dates of the field reconnaissances, the general condition of Pond No. 4 Dam is assessed poor. This evaluation is specifically based on a steep upstream embankment slope, sparse vegetation cover on the crest and upstream slope, and minor slope distress and tree and woody shrub growth on the downstream embankment. Seeps located along the downstream embankment toe also represent a potential hazard and warrant periodic observation by the dam owner. In addition, the unprotected spillway channel bottom and sideslopes may also present hazard to the dam during large spillway discharges. Analysis using the HEC-1 Dam Safety version computer program indicated the spillway channel section can pass the recommended 1/2 PMF spillway design flood without overtopping the embankment crest. Spillway discharge capacity is therefore considered adequate. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Jul 01, 1981
- Accession Number
- ADA109157
Entities
People
- James D. Hainley
- Timothy E. Debes