National Dam Inspection Program. Minersville Dam Number 4 (NDI-PA-00675, DER-54-39), Delaware River Basin, Schuylkill County, Pennsylvania. Phase I Inspection Report.
BERGER ASSOCIATES INC HARRISBURG PA
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The dam, as it now stands, is a rockfill dam with a concrete core wall. This wall is founded on rock. The top of the core wall is at elevation 1432.5 which is 2.5 feet below the crest elevation of the embankment at elevation 1435.0. Note Project datum is 25 feet less than the USGS elevations. Based on the visual inspection, past performance and the available engineering data, the dam and its appurtenant structures appear to be in good condition. The hydrologic and hydraulic calculations indicate that the spillway for this dam has the capacity for passing 47 percent of the Probable Maximum Flood PMF without overtopping the embankment. Although 12 PMF will cause some overtopping, the depth of flow due to the overtopping is less than that judged to cause failure and therefore, the spillway, while inadequate, is not considered seriously inadequate.
- Civil Engineering