Problem: In connection with its design of bridge openings the cooperator requires information regarding the hydrologic and hydraulic characteristics of specific reaches of streams.

Objective: To collect flood information at various sites in Virginia for use in flood frequency determinations and to document flood data for future bridge sites.

Relevance and Benefits: An important part of the Virginia Department of Transportation's missions is the safe maintenance, design, and constructions of bridges that cross-waterways and wetlands in the State. The data collected by USGS in conjunction with this project is a vital element of the overall task and mission of the Virginia Department of Transportation.

Approach: Operate crest-stage gages at 44 sites. Make indirect measurements of peak flow as unusual floods occur. Publish peak-flow data in the annual data report and enter into the Peak Flow File of the NWIS System. Prepare special reports as required for unusual flood events.