National Dam Safety Program. Congers Lake Dam (Inventory Number NY 972), Passaic River Basin, Lower Hudson River Area, Rockland County, New York. Phase I Inspection Report,
Abstract
Examination of available documents and a visual inspection of the dam and appurtenant structures did not reveal conditions which constitute an immediate hazard to human life or property. It has been determined that the dam would be overtopped for all storms exceeding approximately 23 percent of the Probable Maximum Flood (PMF). Therefore, the spillway is adjudged 'seriously inadequate', and the dam is assessed as unsafe, non-emergency. It is recommended that, within three months of owner notification, detailed hydrologic and hydraulic investigations of the structure should be undertaken to more accurately determine the site-specific characteristics of the watershed and their effects upon the overtopping potential of the dam. The results of this investigation and analyses will determine the appropriate remedial measures required to achieve a spillway capacity adequate to discharge the outflow from at least the 1/2 PMF. In the interim, a detailed emergency action plan must be developed and implemented during periods of unusually heavy precipitation. Also, around-the-clock surveillance must be provided during these periods.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jun 30, 1981
- Accession Number
- ADA105852
Entities
People
- Granville Kester Jr