National Dam Inspection Program. Spring Brook Intake Dam (NDI ID Number PA-00450, DER ID Number 35-40), Susquehanna River Basin, Spring Brook, Lackawanna County, Pennsylvania. Phase I Inspection Report,
Abstract
Based on visual inspection, available records, calculations, past operational performance, and according to criteria established for these studies, Spring Brook Intake Dam is judged to be in good condition. Based on the size and hazard classification of the dam, the recommended Spillway Design Flood (SDF) varies between 1/2 the Probable Maximum Flood (PMF) and the PMF. Based on the criteria and the downstream conditions, the selected Spillway Design Flood (SDF) at the dam is the Probable Maximum Flood (PMF). The existing spillway will pass about 53 percent of the PMF without overtopping of the dam. The spillway capacity is rated as inadequate. If the low area on the top of the dam were filled to the design elevation, the spillway would pass about 56 percent of the PMF, and it would still be rated as inadequate. The only stability problem evident at the dam is a bulge on the upstream slope of the embankment. The main and auxiliary spillway weirs have no significant deviations from the OCE guidelines for stability of gravity structures. There are two emergency drawdown facilities at the dam. One of these facilities is operational, but because of its small size, its ability to draw down the pool is marginal. The ability of the other facility to function is uncertain.
Document Details
- Document Type
- Technical Report
- Publication Date
- Apr 01, 1980
- Accession Number
- ADA085271
Entities
People
- Frederick Futchko