National Dam Inspection Program. Lake Lehigh Dam (NDI ID Number Pa-00151 DER ID Number 64-51) Delaware River Basin, Lehigh River, Wayne and Lackawanna Counties, Pennsylvania. Phase I Inspection Report

摘要

The purpose of the inspection is to determine if the dam constitutes a hazard to human life or property. Lake Lehigh Dam is located on the headwaters of the Lehigh River in Lehigh Township, Wayne and Lackawanna Counties, approximately one-half mile northwest of Gouldsboro, pennsylvania. The overall condition of the dam is poor. Noteworthy deficiencies observed are described in the following paragraphs. The crest, upstream slope, and downstream toe of the dam are partially overgrown with brush and small trees ranging in size up to six inches in diameter. Low areas were observed on the crest of the dam adjacent to and at both ends of the principal spillway. Each low area is approximately 80 to 100 square feet in size and 12 to 18 inches lower than the remainder of the embankment. Concentrated seepage was observed at the toe of the dam at both locations. A slight drawdown of the water surface was observed at the upstream side of the dam to the right of the spillway where the seepage entered the embankment. The flow could be heard rushing through the embankment at both ends of the spillway. It is possible that this seepage is causing internal erosion of the dam which could be responsible for the low areas. The low areas may also have been caused by overtopping of the dam during high pool levels.