• Location: Oregon Statewide

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