Accession Number:

ADA063151

Title:

National Dam Inspection Program. Tubmill Dam (ID Number PA 488), Ohio River Basin, Tubmill Creek, Westmoreland County, Pennsylvania. Phase I Inspection Report.

Descriptive Note:

Corporate Author:

D'APPOLONIA CONSULTING ENGINEERS PITTSBURGH PA

Personal Author(s):

Report Date:

1978-06-01

Pagination or Media Count:

68.0

Abstract:

The Tubmill Dam is a masonry-gravity structure approximately 1100 feet long with a maximum height of 40 feet from the downstream toe. The single spillway is a 200-foot section of the dam which is two feet below the dam crest. Based on the evaluation of the conditions as they existed on the dates of inspection April 25 and May 4, 1978 and as revealed by visual observations, the condition of Tubmill Dam is assessed to be good. The spillway does not have the recommended capacity to pass the probable maximum flood without overtopping. However, the dam is a masonry structure, and overtopping by the probable maximum flood would not significantly affect the stability of the dam. Therefore, the spillway capacity is considered to be adequate. However, during unusually heavy runoff when overtopping might occur, an around-the-clock surveillance plan shold be implemented to detect possible problems, such as rapid erosion of the abutments. It is recommended that the owner develop a formal warning system to alert downstream residents in the event of emergencies.

Subject Categories:

  • Civil Engineering
  • Safety Engineering

Distribution Statement:

APPROVED FOR PUBLIC RELEASE