National Dam Inspection Program. Rickards Dam (NDI I.D. Number PA-00405, PennDER I.D. Number 52-82), Delaware River Basin, Branch of Hornbecks Creek. Pike County, Pennsylvania. Phase I Inspection Report,
GAI CONSULTANTS INC MONROEVILLE PA
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Based on a visual inspection, construction history, and available engineering data, the dam is considered to be in poor condition. The size classification of the facility is small and its hazard classification is considered to be high. In accordance with the recommended guidelines, the Spillway Design Flood SDF for the facility ranges between the 12 PMF Probable Maximum Flood and the PMF. Since the facility is classified near the lower bounds of the small category, the SDF is considered to be the 12 PMF. Results of the hydrologic and hydraulic analysis indicate the facility will pass andor store only about 29 percent of the PMF prior to embankment overtopping at the low area in the main embankment crest. Breach analysis indicates that failure under less than 12 PMF conditions could lead to increased downstream damage and potential for loss of life. Thus, based on screening criteria provided in the recommended guidelines, the spillway is considered to be seriously inadequate and the facility unsafe, non-emergency. Structural deficiencies observed by the inspection team included excessive settlement of both the main embankment and dike structures, general deterioration of the spillway and outlet works, and a general lack of routine maintenance . Historical correspondences also strongly questions the construction quality of the facility.
- Hydrology, Limnology and Potamology
- Civil Engineering