National Dam Inspection Program. Broadford Run Dam. Little Youghiogheny River Site Number 6. (NDI I.D. Number MD-361) Ohio River Basin. Broadford Run. Garrett County, Maryland. Phase I Inspection Report,
ACKENHEIL AND ASSOCIATES INC BALTIMORE MD
Pagination or Media Count:
Based on the evaluation of available design information and visual observations of conditions as they existed on the dates of the field reconnaissances, the general condition of Little Youghiogheny Site No. 6 is considered to be fair. This fair condition classification is specifically based on the visual observation of a seepage zone located at the toe of the dam at the left east side of the exit stream channel. The cause and origin of the seepage is not known with certainty. It is believed the seepage condition may represent a potential hazard to the dam. Since this wet area left of the stream channel initially developed with the filling of the reservoir it is believed to be caused by seepage through the embankment of foundation. The observed silt material contained in the seepage zone indicates piping may be in progress. Therefore, further investigation is considered necessary to ascertain the significance of the seepage to dam stability. Little Youghiogheny Site No. 6 is classified as an intermediate size, high hazard dam according to guideline criteria. Based on Soil Conservation Service hydrologicalhydraulic design computations, spillway capacity is adequate to pass 100 percent of the PMF. Therefore, spillway capacity is in accordance with recommended criteria.
- Civil Engineering