National Dam Safety Program. Fawn Lake Dam (Inventory Number VA 17709), York River Basin. Spotsylvania County Virginia. Phase I Inspection Report.
SCHNABEL ENGINEERING ASSOCIATES RICHMOND VA
Pagination or Media Count:
The Dam is a homogeneous earthfill structure about 2230 ft long and 63 ft high. The principal spillway consists of a rectangular reinforced concrete riser 9 ft x 3 ft and 240 ft of 36 inch diameter concrete discharge pipe. A 200 ft wide earthen emergency spillway is located at the left abutment, 3.5 ft above the principal spillway. The dam is an intermediate size structure and is assigned a significant hazard classification. The spillway will pass 45 percent of the Probable Maximum Flood PMF or 90 percent of the SDF without overtopping. The spillway is judged inadequate, but not seriously inadequate. The visual inspection did not reveal any problems which would require immediate attention., A better vegetative cover should be established in the emergency spillway. Several eroded areas existing on the downstream slope should be examined during normal maintenance. Seepage areas described along the left and right downstream toe of the embankment should be monitored quarterly. An emergency operation and warning plan should be developed. The upstream slope does not meet the guidelines recommended for earthfill dams subject to rapid drawdown.
- Hydrology, Limnology and Potamology
- Civil Engineering