most 53-year-olds, the Herbert C. Bonner Bridge over Oregon Inlet
requires an annual checkup to ensure its continued health. That checkup
will occur Tuesday, June 13, at 9 a.m., when the N.C. Department of
Transportation will conduct a routine mobile scan of the 2.7-mile
Road crews will halt traffic on both ends of the Bonner Bridge for no
more than 30 minutes while staff conducts the scan. The bridge will
reopen to traffic at 9:30 a.m.
It is normal for a bridge to move, expand, and contract with weather.
By performing this scan once a year, as well as after hurricanes and
other severe weather, the department's safety experts are 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 slowly travels along
the bridge, turns around and travels back. While the truck is traveling
on the bridge, the reader pinpoints the exact location of each data
point. This information will then be compared to data gathered last
year to determine if there has been any abnormal movement of the bridge.
In addition to the 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
A project to replace the Bonner Bridge is nearly half-complete. The new
bridge is scheduled to open to traffic in the fall of 2018.