Beam material: Concrete
Max Span Length (ft.): 160
Total Bridge Length (ft.): 160
Construction Equipment Category: Conventional
ABC Construction Equipment: Conventional
State ID Number: 21252
NBI Number: 21252
Latitude: 44.3785591 | Longitude: -100
Bridge DescriptionProject Summary:
The 160-ft-long and 30.67-ft-wide single-span precast prestressed bulb-tee girder replacement bridge cross-section consists of four 7.5-ft-deep pretensioned bulb-tee (ODOT BT90) girders spaced at 7.33 ft with 8.5-inch-thick full-width 8,000 psi precast high-performance concrete (HPC) deck panels and ultra-high-performance concrete (UHPC) transverse closure joints. This bridge replacement was a precast deck experimental Highways for LIFE demonstration project.
US 30 (Huntington Highway #449) at Milepost 2.75 over Burnt River and Union Pacific Railroad in Baker County, Oregon
Tier 6 (longer but reduced by months/years)
Mobility Impact Time:
8 months ABC vs. additional 2-3 weeks for conventional deck
- reduced onsite construction time
- improved work-zone safety
- improved site constructability
- improved material quality and product durability
- minimized environmental impacts
- reduced life-cycle cost
160-ft-long and 30.67-ft-wide single-span precast prestressed bulb-tee girder bridge; 25 deg. skew
Average Daily Traffic (at time of construction):
If constructed conventionally: extended use of 7.5-mile detour
Existing Bridge Description:
The existing three-span bridge consisted of a steel through-truss main span and reinforced concrete girder and cross beam approach spans. The bridge was 204-ft long and 20.5-ft wide with concrete substructure. It had two 9.75-ft-wide traffic lanes and no shoulders. Built in 1922, the weight-restricted bridge was deteriorated and required replacement.
Replacement or New Bridge:
The replacement bridge has two 10-ft-wide traffic lanes and two 4-ft-wide shoulders. The cross-section consists of four 7.5-ft-deep pretensioned bulb-tee (ODOT BT90) girders spaced at 7.33 ft with 8.5-inch-thick full-width 8,000 psi precast high-performance concrete (HPC) deck panels and ultra-high-performance concrete (UHPC) transverse closure joints. The abutments consist of a mechanically-stabilized earth (MSE) wall and cast-in-place concrete pile cap over HP 14×89 steel piles at one end and a cast-in-place abutment and spread footing on rock at the other end.
This bridge replacement was a precast deck experimental Highways for LIFE demonstration project.
ODOT’s goal was to use this project, the first of its kind for ODOT, to learn and as an evaluation tool. Therefore, ODOT chose a project site with low traffic volume and minimal anticipated impact to traffic. While no cost savings were obtained from ABC on this project, lessons and methods learned will help savings on projects with high traffic volumes and a need for ABC. User cost savings to UPRR crews, utility crews, and two residential properties were not calculated.
High Performance Material:
High-performance concrete (HPC) precast deck panels; Ultra-high-performance concrete (UHPC) transverse deck closure joints
Project PlanningDecision Making Tools: State process
Project Delivery: Design-bid-build
Contracting: Full lane closure
Geotechnical SolutionsFoundations & Walls:
Structural SolutionsPrefabricated Bridge Elements: Full-depth precast deck panel w/o PT; MSE walls
Prefabricated Bridge Systems:
Miscellaneous Prefabricated: CIP reinforced concrete closure joints; Grouted blockout w/shear connectors; UHPC closure joints
Costs & FundingCosts:
The engineer’s estimate for the project was $2,378,775. The low bid was $2,345,845. There were 16 bidders. The cost per square foot of bridge was $248 compared to $137.00 for conventional construction in this region in 2012.
Federal and State
HfL (Highways for LIFE): $500,000
ODOT’s ABC Guidelines including Decision-Making Framework are located in Section 3.24 of the Bridge Design and Drafting Manual.
Downloadable ResourcesContract Plans:
Other Related Information:
Other Related URLs:
Oregon Department of Transportation; Knife River Prestress
Bruce V. Johnson, P.E.
State Bridge Engineer
Mary Lou Ralls P.E.
Ralls Newman, LLC