Bull Mountain Design-Build


Ames Construction // Alternative Delivery // Bull Mountain Design-Build

Project Location: Yellowstone and Musselshell Counties, Montana

Client: Global Rail Group, LLC

Synopsis of work:

Ames Construction was the design-build general contractor for this 36-mile long railroad spur that included construction of 5 bridges. Under a very aggressive schedule for this alternative delivery project, Ames crews moved 9.6 million cubic yards of earthwork in 9 months. The bridges are all 3-span structures utilizing precast concrete girders and cast-in-place footings, piers, abutments and decks. The new rail spur ties into existing BNSF Railway mainline tracks near Broadview, Montana.

The design team was provided a relatively narrow corridor, railroad grade restrictions, railroad curve restrictions, and a large number of county road and private road crossings that had to be maintained and/or improved. The project worked seven days a week around the clock during an unusually cold Montana winter in order to keep the fills live so that they were not exposed to freezing temperatures for extended periods. Three million cubic yards of rock required blasting. One rock cut was 14,000 feet long and up to 70 feet deep. The project scope included massive earthwork, aggregate processing and placement and grading.

Click to enlarge any of the photos below:

Design-build of 36-mile long rail spur included construction of five bridges
Crews moved nearly 10 million CY of earthwork in nine months
Project was performed in a narrow corridor with railroad grade and curve restrictions