Since 2008, B&N has performed National Bridge Inspection Standards (NBIS) inspections of On- and Off-System bridges for the Oklahoma Department of Transportation (ODOT). This includes more than 25 contracts with ODOT to perform: fracture critical, in-depth, routine and other special inspections; load ratings; and bridge assessment studies. This has resulted in more than 1,300 inspections and 300 load ratings completed in 62 counties throughout the state. Conceptual repair details also were developed to address critical findings on many off-system bridges.
Additional project features include:
- Bridge assessments to study rehabilitation vs. replacement options
- Development of final design plans for replacement of multiple concrete box girder hinges
- Load ratings performed with BAR7, BrR, CONBOX, MIDAS, Enercalc, and in-house developed analysis tools
- Inspections performed at arm’s length with industrial rope and climbing techniques
Notable structures inspected include:
- Bridgeport Bridge, a historic 3,900-foot-long multi-truss structure carrying old Route 66 in Central Oklahoma
- I-40 over the Arkansas River, 1,989-foot-long bridge including fracture critical twin girder main spans
- Roosevelt Bridge, a 4,943-foot-long bridge over Lake Texoma, including fracture critical truss and girder spans
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