National Dam Inspection Program. Christman Dam (NDS I.D. Number 00721 DER I.D. Number 6-460), Delaware River Basin, Tributary to Maiden Creek, Berks County, Pennsylvania. Phase I Inspection Report,

Christman Dam is owned and maintained by Mr. Carl W. Christman. The dam was built for recreational purpose. Visual inspection and review of design documentation indicate that the spillway is in fair condition, but the overall evaluation of Christman Dam is poor. The dam is classified as a small size structure with a high hazard classification, consistent with its potential in the event of failure, for extensive property damage and loss of life in the downstream town of Virginville. In accordance with criteria established by Federal (OCE) Guidelines, the spillway design flood is 0.5 to 1.0 PMF (Probable Maximum Flood). As the height of this dam is near the lower limit for small size dams, and the existing total capacity is about one-third of the upper limit, the selected spillway design flood is 0.5 PMF. Hydrologic and hydraulic computations presented in Appendix D indicate that, under existing conditions, the spillway can pass about 0.59 PMF without overtopping the embankment. Under design conditions, the spillway can pass about 0.88 PMF without overtopping. Therefore, the spillway system of this structure is considered to be adequate.