Transportation

Annual scan of Bonner Bridge scheduled for Thursday morning

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The Herbert C. Bonner Bridge in Dare County. Photo by C. Leinbach

Aug. 4, 2015

Raleigh- Weather permitting, the N.C. Department of Transportation will halt traffic on both ends of the Herbert C. Bonner Bridge over the Oregon Inlet on N.C. 12 at 9 a.m. Thursday, Aug. 6, for no longer than 30 minutes in order to do a safety scan of the bridge.

This will allow crews from NCDOT’s Location and Surveys Unit to perform a routine annual scan of the bridge deck. The bridge will reopen to traffic at 9:30 a.m. immediately following the scan.

It is normal for a bridge to move, expand and contract with weather. By performing this scan once a year, as well as following hurricanes and other severe weather events, NCDOT is able to monitor and evaluate any abnormal movement of the bridge.

The Bonner Bridge has a series of GPS data points placed along the deck. During the scan, a truck with a GPS reader will slowly travel along the bridge, turn around and travel back. While the truck is traveling on the bridge, the reader will gather location data of each of the data points.

This data will then be compared to previous data gathered last year to determine if there has been any abnormal movement of the bridge.

In addition to routine annual deck scans, NCDOT also performs monthly underwater sonar scans to monitor the bridge’s support structure for signs of scour, where sand has drifted away from the pilings.

For real-time travel information at any time, call 511, visit the Traveler Services section of the NCDOT website or follow NCDOT on Twitter. You can also access NCDOT Mobile, a version of the NCDOT website especially for mobile devices. Visit m.ncdot.gov from your mobile browser.

Categories: Transportation