We Engineer Projects That Last
Whether you are a public, non-profit or a private client, our dedicated team of professionals are ready to work with you on your most important projects.
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Jorgensen's long-standing success is attributable to its emphasis on seeking environmentally responsible, innovative solutions to address community needs. Our goal is to provide services of the highest quality and deliver more value to our clients that earn their respect and loyalty.
Astoria Bridge
Hoback, WY
The Astoria Bridge is a two-lane structure spanning the Snake River in Hoback, Wyoming, providing a critical connection for homes and businesses in the area. The project presented unique geotechnical challenges including significant variation in the depth to bedrock between the two riverbanks and the presence of geothermal activity. Piers on both sides of the river are supported using drilled shaft foundations.
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Jorgensen played a key role in supporting the design and construction of the bridge, with staff performing topographic-surveying, civil-engineering, and geotechnical-engineering services. Survey crews collected topographic data of the river bottom using a drift boat. Civil engineers coordinated with many stakeholders - including Army Corps of Engineers, Forest Service, Teton County, and Wyoming DOT - to design the grading and approaches to the bridge. The geotechnical-engineering team explored subsurface conditions using several drilling techniques and a helicopter-access rig. During construction, geotechnical engineers observed the installation and testing of H-piles for the abutments and of drilled shafts for the piers. Drilling the shafts proved to be particularly demanding, requiring creative troubleshooting from the entire team. Additionally, winter conditions added complexity to the construction timeline, requiring careful coordination and adaptability on-site.
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Despite these challenges, the project was successfully completed on a very short duration, ensuring a resilient and reliable crossing over the Snake River. Jorgensen’s expertise in surveying, engineering, and construction oversight contributed to the bridge’s long-term stability and functionality, reinforcing our commitment to delivering innovative and dependable infrastructure solutions.
