National Dam Inspection Program. Big Boulder Dam (NDS ID Number PA 00615, DER ID Number 13-93), Delaware River Basin, Carbon County, Pennsylvania. Phase I Inspection Report,
Abstract
Big Boulder Dam is owned by the Big Boulder Corporation and serves as a recreation lake and water supply for snow making at the lodge. The dam was built in the summer of 1957, and is classified as an 'Intermediate' size dam by virtue of its 1,971 acre-foot maximum storage capacity. Big Boulder Lake is formed by Dam A across Grass Lake Creek and Dam B, a saddle dam on the watershed divide. In the event that Dam B fails, extreme property damage and a possibility for the loss of life exists downstream along Swamp Run, thus classifying the structure as a 'High' hazard dam. The hydrologic and hydraulic calculations presented indicate that the spillway system for this structure is rated as 'Adequate' as it will pass the PMF. On the basis of the visual inspection on 11 May 1979, and review of available construction and design documentation, the dam and appurtenances of Big Boulder Reservoir appear to be functioning satisfactorily with the exception of undesirable seepage at the downstream toe of Dam A. The resident engineer's reports leave some question as to the quality of foundation preparation.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jul 01, 1979
- Accession Number
- ADA078878
Entities
People
- John Boschuk Jr.