Completed intersection at North 7th Avenue and Griffin Drive with upgraded lanes and lighting.

North 7th Ave. and Griffin Drive

Sanbell (formerly Sanderson Stewart) led improvements to the North 7th Avenue and Griffin Drive intersection in Bozeman, Montana. This Montana Department of Transportation (MDT) project focused on improving traffic flow, safety, and infrastructure. The upgrades included a new traffic signal, expanded turn lanes, better lighting, and modern storm drainage. Dual westbound left-turn lanes eased heavy […]

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Aerial view of the II-90 Yellowstone River Project highway widening in Billings, Montana

I-90 Yellowstone River Road

Sanbell – Rocky Mountain (formerly Sanderson Stewart) supported HDR on the I-90 Yellowstone River Project in Billings, Montana. This Montana Department of Transportation (MDT) project upgrades a critical stretch of Interstate 90 to improve safety, traffic flow, and long-term infrastructure resilience. The project will finish in 2024. It widens the interstate inward to add an […]

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Aerial view of the Central Avenue and Roundabout at Central Avenue and 56th Street in Billings, Montana after construction.

Central Avenue and 56th Street Roundabout

Sanbell played a key role in completing the Roundabout Central & 56th project (UPN 8611000) in Billings, Montana. Construction finished in 2022. The project included designing and building a roundabout as part of two safety initiatives. It also involved major irrigation, access, and drainage improvements. Sanbell handled road design, topographic surveying, cadastral Certificate of Survey […]

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Welcome to Sanbell — The Core Design team is now part of Sanbell, bringing together talented professionals, expanded capabilities, and a shared commitment to serving our clients and communities. You’ll continue working with the same trusted team, now backed by the strength and resources of Sanbell.

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