Pioneer Street Rail Overpass
Ridgefield, WA
At Ridgefield's downtown waterfront, the 500-foot Pioneer Street Rail Overpass carries vehicles, bicyclists, and pedestrians over the BNSF rail corridor. Pacific Foundation installed the large-diameter drilled-shaft foundations for Tapani, Inc.
Highlights
- 500-foot, five-span overpass connecting downtown Ridgefield with the waterfront
- Three precast-concrete-girder spans and two cast-in-place spans form the turn toward the marina
- Six 8-foot-diameter drilled shafts installed to approximately 70 feet
- Uninterrupted route for motorists, bicyclists, and pedestrians opened in September 2021
Scope of Work
Pacific Foundation's scope for Tapani, Inc. was the drilled-shaft foundation package. Crews used a Bauer BG 40 to install six 8-foot-diameter shafts to depths of approximately 70 feet. The work required coordinated handling of large-diameter casing, drilling, and concrete placement on the rail-adjacent bridge site. The completed shafts formed deep foundation support for the new overpass substructure.
Methods and Site Conditions
Methods
Site Constraints
Large-diameter shaft installation took place beside the BNSF rail corridor on a compact downtown bridge site, requiring coordinated casing handling, drilling, and concrete placement.
This condition affects access, sequencing, and field coordination for the project scope. Pacific Foundation accounts for these constraints when planning equipment movement, crew access, work-area controls, and coordination with adjacent construction activity.
Quantities and Dimensions
- Pacific scope: 6 drilled shafts
- Shaft diameter: 8 ft
- Approximate shaft depth: 70 ft
- Overpass length: 500 ft
- Overpass configuration: 5 spans
Services and equipment
Send Us Your Plans
Send the drawings, specifications, geotechnical report, pile or shaft schedule, and site constraints. Pacific Foundation can review the foundation scope and next steps.