1992 - Oak Creek Bridge

  • Year ABC Built: 1992
  • State: Arizona
  • Owner: State
  • Location: Rural
  • Spans: One-span
  • Beam Material: Concrete
  • Max Span Length (ft.): 190.00
  • Total Bridge Length (ft.): 190.00
  • Construction Equipment: Lateral Slide
  • State ID #: 2264
  • NBI #: BRS-366(11)P
  • Coordinates:     Latitude: 34.9449997, Longitude: -111.753334
  • Bridge Description

  • Project Summary:
  • Project Location: On US 89A at milepost 381.32 in Coconino County south of the city of Flagstaff
  • Mobility Impact Time: ABC: Weekend closure Conventional: four months of traffic impacts
  • Impact Category: Tier 2 (within 3 days)
  • Primary Drivers:

    Reduced traffic impacts, minimized environmental impacts

  • Dimensions: 190-ft long and 41.17-ft wide single-span post-tensioned concrete box girder bridge slide-in
  • Average Daily Traffic (at time of construction): 0
  • Traffic Management: Traffic management alternative, if constructed conventionally: 80-mile detour
  • Existing Bridge Description: The existing 23.33-ft-wide steel deck truss bridge had two 10-ft-wide lanes. It connected the north and south side of Oak Creek Canyon. Built in 1933, the 20-ft-wide bridge was too narrow to safely accommodate current traffic needs and had to be replaced.
  • Replacement or New Bridge: The two-lane replacement bridge has two 4-ft-wide shoulders and a 5-ft-wide sidewalk. The cross-section consists of two 11-ft-wide post-tensioned concrete box girder cells that vary in depth from 8.5 ft to 16.0 ft, with a 9-inch-thick deck that cantilevers approximately 9.5 ft on each side. It was designed to resemble the old Luten Arch bridge with the use of architectural effects and rock wall facing on the new abutments. In order to avoid closing the highway and forcing motorists on an excessively long detour, ADOT drew on a design from the past and coupled it with an innovative technology from today. The result was a permanent concrete bridge that was built at one location and moved laterally into place.
  • Construction Method: The project was done in three phases. Stage one called for keeping traffic on the old bridge, excavation, removing the existing southwest wing wall and replacing with temporary shoring. Also, new abutments were built about three feet west of the existing bridge and the new box girder superstructure was built along with a new northwest retaining wall. In stage two, traffic was detoured onto the new bridge while the existing southeast retaining wall and wingwall and the old bridge were demolished. All debris was contained and none was allowed to fall into the creek. Sections of the approach slab were also built in stage two. Stage three involved finishing the approaches, demolishing the temporary abutments, and moving the new bridge laterally 26.33 ft into position using bearings coated with Teflon.
  • Stakeholder Feedback: (none)
  • High Performance Material: (none)
  • Project Planning

  • Decision Making Tools: (none)
  • Site Procurement: (none)
  • Project Delivery: Design-bid-build
  • Contracting: Full lane closure
  • Geotechnical Solutions

  • Foundations & Walls: (none)
  • Rapid Embankment: (none)
  • Structural Solutions

  • Prefabricated Bridge Elements: (none)
  • Prefabricated Bridge Systems: FDcBc (full-width concrete-Decked concrete Beam Unit)
  • Miscellaneous Prefabricated: (none)
  • ABC Construction Equipment: Lateral Slide w/pad (skids)
  • Cost & Funding

  • Costs: The cost per square foot of bridge was $148 compared to $42 for conventional construction in this region in 1992.
  • Funding Source: Federal and State
  • Incentive Program: (none)
  • Additional Information

Downloadable Resources

Contract Plans:
Other Related Information:
Photo Credits: Arizona Department of Transportation



Owner: Jean A. Nehme, Ph.D.,
P.E. State Bridge Engineer
Arizona Department of Transportation

Bridge Description Summary Sheet: