National Dam Inspection Program. Warrington Township Retention Basin (NDS I.D. Number PA 01066, DER I.D. Number 9-176), Delaware River Basin, Bucks County, Pennsylvania. Phase I Inspection Report.
WOODWARD-CLYDE CONSULTANTS PLYMOUTH MEETING PA
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Warrington Township Retention Basin Dam was built to control storm runoff resulting from upstream residential development. Visual inspection and review of design and construction documentation indicate that the dam and appurtenant structures of Warrington Township Retention Basin Dam are in generally good condition. In accordance with criteria established by Federal OCE Guidelines, the spillway design flood for this Small size dam and Significant hazard classification is the 100 Year Flood to one-half the Probable Maximum Flood PMF. Because of the dams low height and small total capacity, the selected spillway design flood is the 100 year event. Hydrologic and hydraulic computations presented in Appendix D indicate that the spillways are capable of passing the 100 year event without overtopping the embankment under design conditions. Under existing conditions, the spillway capacity is estimated to be overtopped by about 0.2 feet. The spillway system of this structure is considered to be Inadequate under assumed existing conditions.
- Civil Engineering