Accession Number:

ADA109782

Title:

National Dam Safety Program. Alexander Lake Dam (Inventory Number N.Y. 936), Susquehanna River Basin, Tioga County, New York. Phase I Inspection Report,

Descriptive Note:

Corporate Author:

D'APPOLONIA CONSULTING ENGINEERS INC PITTSBURGH PA

Personal Author(s):

Report Date:

1981-07-01

Pagination or Media Count:

61.0

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. Based on the evaluation of the existing conditions, the condition of Alexander Lake Dam is considered to be fair. A minor seepage area and some wet areas are located along the downstream toe. The vertical and horizontal alignment of the dam crest is irregular. However, the observed conditions are not consistent to significantly affect the overall performance of the dam at this time. The owners representative reported that the low level outlet pipe for the embankment was plugged by concrete prior to the filling of the dam, as required by the design drawings. Therefore, the dam has no functional low level outlet facilities that could draw down the reservoir in the event of an emergency. The spillway capacity was evaluated according to the recommended procedure and was found to pass 80 percent of the Probable Maximum Flood PMF without overtopping the dam and full PMF with a minor overtopping of the embankment. The spillway capacity of the dam is rated to be inadequate because the spillway cannot pass the recommended spillway design flood of full PMF without overtopping the dam. Author

Subject Categories:

  • Hydrology, Limnology and Potamology
  • Civil Engineering

Distribution Statement:

APPROVED FOR PUBLIC RELEASE