National Dam Safety Program. Lower Tumbling Run Dam (National I.D. Number PA-00688), Schuylkill River Basin, Schuylkill County, Pennsylvania. Phase I Inspection Report.
WOODWARD-CLYDE CONSULTANTS PLYMOUTH MEETING PA
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Lower Tumbling Run Dam, owned by the Schuylkill Haven Borough, is used as a water supply structure for the town of Schuylkill Haven and surrounding areas. Limited records indicate that the dam was constructed in 1832 and completed in 1833. The dam failed in 1850 and again in 1869. The facility is judged to be in fair condition although the embankment slopes are considered to be steep. Hydrologic and hydraulic calculations indicate that overtopping of the dam will occur at approximately 30 of the probable maximum flood. Therefore, the spillway is considered to be Seriously Inadequate. The dam is classified as an Intermediate structure by virtue of its forty-nine foot height, and as a High hazard dam consistent with a potential at failure for extensive property damage and loss of life at the water treatment plant and further downstream at Mount Carbon, Pennsylvania. There is insufficient engineering and construction data to adequately evaluate the stability of the dam and condition of the outlet works.
- Civil Engineering