National Dam Safety Program. Windsor Lake Dam (Inventory Number VA 77001), Roanoke River Basin, City of Roanoke, Virginia. Phase I Inspection Report.
Abstract
The Windsor Lake Dam is an earthfill structure approximately 380 feet long and 30.3 feet high. The dam is owned and maintained by the Windsor Lake Corporation. The dam is classified as a small size dam with a significant hazard classification. The principal spillway is a 16-inch cast iron pipe drop inlet that connects to an 8-inch cast iron pipe that passes through the dam at low level. The emergency spillway is an open channel V-shaped earthen spillway located on the left abutment. The reservoir is used for recreation. Based on criteria established by the Department of the Army, Office of the Chief of Engineers (OCE), the Spillway Design Flood (SDF) is the 1/2 PMF. The emergency spillway will pass 18 percent of the PMF or 36 percent of the SDF without overtopping the dam. The SDF will overtop the dam by a maximum of 0.41 feet, reach an average critical velocity of 3.0 feet per second and flow over the dam for 2.5 hours. Flows overtopping the dam during the SDF are not considered detrimental to the embankment. The spillway is adjudged inadequate, but not seriously inadequate. The visual inspection revealed no apparent problems and there are no immediate needs for remedial measures. Maintenance is performed by the owners. However, there is no regular maintenance operations program or warning system.
Document Details
- Document Type
- Technical Report
- Publication Date
- Nov 01, 1980
- Accession Number
- ADA103506
Entities
People
- James A. Walsh
Organizations
- Norfolk District, U.S. Army Corps of Engineers