Accession Number:

ADA106050

Title:

National Dam Safety Program. Genegantslet Lake Dam (Inventory Number N.Y. 846), Susquehanna River Basin, Chenango County, New York. Phase I Inspection Report,

Descriptive Note:

Corporate Author:

NEW YORK STATE DEPT OF ENVIRONMENTAL CONSERVATION ALBANY

Personal Author(s):

Report Date:

1981-03-31

Pagination or Media Count:

74.0

Abstract:

This report provides information and analysis on the physical condition of the dam as of the report date. Information and analysis are based on visual inspection of the dam by the performing organization. Examination of available documents and a visual inspection of the dam did not reveal conditions which constitute an immediate hazard to human life or property. However, the dam has some deficiencies which need to be evaluated and remedied. Using the Corps of Engineers Screening Criteria for initial review of spillway adequacy, it has been determined that the dam would be overtopped by all storms exceeding 5 of the Probable Maximum Flood PMF inflows. While this dam has withstood overtopping in the past, it cannot be assured that overtopping will not eventually cause the dam to fail. Since failure of the dam would increase the hazard to downstream residents, the spillway capacity is adjudged 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 connote the same degree of emergency as would be associated with an unsafe classification applied for a structural deficiency. It does mean that there appears to be a serious deficiency in spillway capacity and if a severe storm were to occur, overtopping and failure of the dam could take place, significantly increasing the hazard to loss of downstream of the dam. Inspection of the dam also revealed that there was a seepage problem on this structure. Seepage was exiting on the downstream slope and at the toe in the embankment section at the right end of the dam.

Subject Categories:

  • Hydrology, Limnology and Potamology
  • Civil Engineering

Distribution Statement:

APPROVED FOR PUBLIC RELEASE