Alaska’s Record-Breaking Juneau Creek Bridge
The record-breaking Juneau Creek Bridge spans a deep canyon near Cooper Landing as part of the Sterling Highway bypass project. The 928-foot bridge is a major engineering milestone, but the full highway isn’t expected to open to traffic until 2032. Photo courtesy of KWH Constructors.
The Juneau Creek Bridge is a major engineering milestone for Cooper Landing. The nearly $1 billion highway project still has years of work ahead.
Alaska’s record-setting Juneau Creek Bridge has crossed a steep canyon near Cooper Landing, marking a major milestone in the Sterling Highway MP 45–60 project. But drivers will have to wait years before they can use the new highway bypass.
The 928-foot steel-girder bridge rises approximately 291 feet above Juneau Creek. In June 2026, construction crews used four hydraulic rams to push the massive structure across the canyon in an eight-day operation.
Rather than build temporary supports inside the protected canyon, engineers assembled the bridge beside it and launched it across the gap. The steel was fabricated and test-assembled in Arizona, then transported by truck and barge to Alaska.
The result is an extraordinary engineering achievement in a landscape where construction presents serious logistical and environmental challenges.
Why Build a Bypass?
The existing Sterling Highway winds through Cooper Landing alongside the Kenai River. Limited sight distances, narrow shoulders and heavy summer traffic create safety concerns for residents, commercial drivers and visitors.
The bypass project includes approximately 10 miles of new highway and reconstruction of five miles of existing road. Planned improvements include wildlife crossings, better passing opportunities and trail access.
Moving through-traffic away from the river corridor is also intended to reduce the risk of highway incidents affecting the Kenai River, a major resource for fishing, recreation and tourism.
But the new route could change business for Cooper Landing, too. Some business owners worry that fewer passing motorists could mean fewer customers stopping for fuel, food and lodging.
A Nearly $1 Billion Price Tag
The overall project estimate has risen substantially from early projections. Alaska Business Magazine reported in September 2026 that the project had reached nearly $1 billion in estimated costs.
The Juneau Creek Bridge contract alone was awarded for $151 million. The larger project includes the bridge, highway approaches, road reconstruction and other infrastructure.
When Can Drivers Use It?
Construction continues across multiple project stages. The current official planning schedule points to 2032 for the full highway opening, although funding and construction schedules could change.
Alaska DOT&PF has documented the bridge’s progress in a construction video, showing how the structure is being built into Alaska’s rugged landscape.
👉🏿 Watch Alaska DOT&PF’s Juneau Creek Bridge construction video
The bridge has crossed the canyon. Now comes the rest of the road.
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Sources
- Alaska DOT&PF: Sterling Highway MP 45–60 project
- Alaska Business Magazine: Cooper Landing bypass project, September 2026
- Alaska DOT&PF: Juneau Creek Bridge construction video
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