B&N performed National Bridge Inspection Standards (NBIS) fracture critical, routine and in-depth bridge inspections of 16 major steel structures for the Oregon Department of Transportation (ODOT) between 2012 and 2016. Structures inspected during the four-year contract were located throughout the state and included:
- Astoria-Megler Bridge, 6,505-foot through truss
- Coos Bay Bridge, 5,305-foot through truss
- I-5 Northbound & Southbound Bridges, 3,538-foot through truss
- Marquam Bridge, 1,044-foot through truss
- Mill Creek Bridge, 536-foot deck truss
- Thomas Creek Bridge, 956-foot deck truss
- West Fremont Bridge Ramps, multiple bridges consisting of varying structure types that include concrete and steel box girders, total length of bridges exceeded 10,900 feet
- Yaquina Bay Bridge, 3,260-foot arch
Inspectors used SPRAT compliant industrial rope access and adapted rock climbing techniques to complete the inspections. Additional project features included:
- Non-destructive testing of suspected defects, including magnetic particle testing
- Use of B&N-developed, client-specific iPad database for field data collection and processing to increase productivity and quality
- High resolution photos and detailed measurements of 260 gusset plates for use in load rating
- AASHTO Element Level inspection and quantification of defects
- BrM/PONTIS and ODOT Fracture Critical reports
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