National Dam Safety Program. Cage Dam (Inventory Number VA 08335) Staunton River Basin. Halifax County, Virginia. Phase I Inspection Report.
ARMY ENGINEER DISTRICT NORFOLK VA
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Cage Dam is an earthfill structure about 400 feet long and 26.3 feet high with a 13-foot crest. Based on criteria established by the Department of the Army, Office of the Chief of Engineers OCE, the Spillway Design Flood SDF is the 12 PMF Probable Maximum Flood. The spillway will pass 12 percent of the PMF or 24 percent of the SDF without overtopping the crest of the dam. The SDF will overtop the dam by 0.9 feet for 3.0 hours and attain a critical velocity of 4.4 feet per second. Overtopping velocities are not considered detrimental to the structure. The spillway is adjudged as inadequate, but not seriously inadequate. The visual inspection revealed no problems in need of immediate attention. Maintenance is performed by the owner. However, there is no regular maintenance operations program or warning system. It is recommended that a regular maintenance and operations program be instituted with provisions for records of all maintenance performed. It is also recommended that warning system be established and that the maintenance items listed in Section 7.2 be accomplished as part of the regular maintenance program within the next 12 months.
- Hydrology, Limnology and Potamology
- Civil Engineering