National Dam Safety Program. Fredonia Reservoir (Inventory Number NY 749), Lake Erie Basin, Chautauqua County, New York. Phase I Inspection Report.
Abstract
Examination of available documents and a visual inspection of the dam revealed conditions which if not corrected constitute a hazard to human life or property. Using the Corps of Engineers screening criteria for review of spillway adequacy, it has been determined that the dam would be overtopped by all storms exceeding approximately 34 percent of the PMF. The overtopping of the dam could cause erosion in the notched earthen section adjacent and parallel to the concrete Ogee weir resulting in possible undermining and failure of the spillway. Failure of the spillway would result in an increased hazard to the loss of life and property downstream. The spillway is, therefore, judged as 'seriously inadequate' and the dam is assessed as unsafe, non-emergency. The classification of 'unsafe' applied to a dam because of a 'seriously inadequate' spillway is not meant to imply the same degree of emergency as would be associated with an 'unsafe' classification applied for a structural deficiency. It does mean, however, there appears to be a serious deficiency in the spillway capacity and if a severe storm were to occur, overtopping and possible failure of the spillway and dam could take place. Thereby significantly increasing the hazard to loss of life downstream of the dam.
Document Details
- Document Type
- Technical Report
- Publication Date
- Sep 20, 1980
- Accession Number
- ADA090940
Entities
People
- Bent L. Thomsen
- Gary L. Wood
Organizations
- New York State Department of Environmental Conservation