National Dam Inspection Program. Little Youghiogheny River Site Number 3. (NDI I.D. Number 45) Youghioghen River Basin. Wilson Run, Garrett County Maryland. Phase I Inspection Report,
Abstract
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. 3 is considered to be good. Wet zones, observed located at the toe of the downstream embankment, are not considered significant relative to dam stability at the present time. However, these zones should be periodically observed to determine if seepage conditions are developing. A concrete wall, designed to support the pipe outlet at the location of the plunge pool, has moved outward toward the plunge pool approximately three (3) inches. This offset is evidenced by the misalignment of the concrete form break between the keyed pipe cradle and concrete wall bent. An inspection of principal spillway outlet pipe joints is needed to determine if pipe joints have separated and exceed allowable tolerances. Periodic observation of the outlet pipe wall support system is also advised to ascertain future movement. Little Youghiogheny Site No. 3 is classified as a small size, high hazard dam. Soil Conservation Service hydrological/hydraulic design computations indicate spillway capacity is adequate to pass 100% of the PMF. Spillway capacity is therefore in accordance with recommended guideline criteria.
Document Details
- Document Type
- Technical Report
- Publication Date
- May 01, 1979
- Accession Number
- ADA088786
Entities
People
- James David Hainley
- Timothy E. Debes