National Steel Bridge Alliance

Manning Crevice Bridge

National Award -- Long Span

 

Project Team

  • Steel fabricator: Rule Steel, Caldwell, Idaho *AISC Member* *AISC Certified*

  • Steel erectors:

    • Donahue McNamara Steel, Hailey, Idaho *AISC Certified*

  • Steel detailer: abs Structural, Melbourne, Fla. *AISC MEMBER*

  • Engineers:

    • Atkins, Denver (structural design and project management)

    • Horrocks Engineers, Meridian, Idaho (CM/GC advisor and roadway design)

    • Shannon & Wilson, Denver (geotechnical design)

  • General contractor and construction manager: RSCI Group, Boise, Idaho 

  • Owners: 

    • U.S. Department of Transportation Federal Highway Administration, Vancouver, Wash.

    • Idaho Transportation Department, Boise, Idaho

    • Idaho County, Grangeville, Idaho

Prize Bridge Information

  • Year Awarded: 2020
  • Year Completed: 2018
  • Location: Riggins, ID
  • Award Class: Long Span

Structure Information

  • Structure Type: Suspension
  • Coating System: Weathering Steel
  • Span Length (ft): 300
  • Structure Length (ft): 300
  • Average Deck Width (ft): 20.1
  • Steel Weight/Deck Area (lb/ft²): 0.031
  • Amount of Steel (tons): 188