VDOT goes high-tech to check for dangers under water
Date: Wed, September 14, 2011
Source: wvec.com Norfolk, VA

NORFOLK – VDOT, the state agency overseeing Virginia’s roadways, is now using new technology to check work under water.

Side-scan sonar lets engineers gather data at around 300 feet, not only straight down but from side-to-side. It produces 3-D color contour maps, sonar images and show elevations of the river bottom.

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