National Dam Inspection Program. Mountain Shadow Lake Dam (NDI ID Number PA 00244, DER ID Number 19-75), Susquehanna River Basin, Beaver Run, Columbia County, Pennsylvania. Phase I Inspection Report

摘要

The visual inspection and review of available design and construction data indicate that Mountain Shadow Lake Dam is in fair condition. The primary deficiency noted during the inspection was the lack of rock protection for the spillway discharge channel along the downstream toe of the embankment. The hydrologic and hydraulic computation indicate that the combination of reservoir storage and spillway discharge capacity will pass 92% of the PMF prior to overtopping the embankment. Therefore, the spillway for Mountain Shadow Lake Dam is considered to be adequate. Recommended actions to be taken by the owner without delay are listed.