Accession Number:

ADA099074

Title:

National Dam Inspection Program. Cokeburg Water Supply Dam (NDI ID Number PA-1094 DER ID Number 63-30) Borough of Cokeburg, Ohio River Basin, Tributary South Branch Pigeon Creek, Washington County, Pennsylvania. Phase I Inspection Report.

Descriptive Note:

Corporate Author:

KIMBALL (L ROBERT) AND ASSOCIATES EBENSBURG PA

Personal Author(s):

Report Date:

1981-04-01

Pagination or Media Count:

75.0

Abstract:

The inspection and review of data of the Cokeburg Water Supply Dam revealed that further investigations of the magnitude of a Phase II are required. The inspection did not reveal any problems which require immediate emergency action. The dam appears to be in poor condition and poorly maintained. The structure is classified an unsafe, non-emergency. The stability of the structure is questionable due to the existence of coke ovens in the downstream slope of the embankment and failure of the discharge culvert outlet. Considerable erosion andor settlement has occurred near the outlet of the spillway discharge culvert. The interior walls of the culvert, at the outlet are caving in and debris partially blocks the outlet. Portions of the reservoir slopes may contain coal refuse, which could lead to potential landslides affecting the storage and volume of the reservoir. During periods of heavy precipitation a potential landslide could occur, increasing the possibility for overtopping of the structure. The Cokeburg Water Supply Dam is a high hazard-small size dam. The Spillway Design Flood SDF for a dam of this size and classification is in the range of 12 PMF to the PMF. The PMF has been selected as the spillway design flood based on the downstream potential for loss of life and property damage.

Subject Categories:

  • Hydrology, Limnology and Potamology
  • Civil Engineering

Distribution Statement:

APPROVED FOR PUBLIC RELEASE