BNSF Bridge 66.4 over Little Salmon River 

by fourcegroup | Jun 3, 2026

BNSF Bridge 66.4 over Little Salmon River  Client Advanced American Construction  Owner BNSF Railroad  Location Carson, WA  about Analysis of new 336ft long truss for construction loading and design of added braces Analysis of truss transfer from fabrication facility...

Wind River Truss Replacement

by fourcegroup | Jun 3, 2026

Wind River Truss Replacement Client Advanced American Construction Owner Burlington Northern Santa Fe Railroad Location Carson, WA  about Prime Contractor – Hamilton Construction On-Water Specialist Sub-Contractor – Advanced American Construction (AAC)  Heavy Lift...

CSX Bridge 64 over the Potomac River

by fourcegroup | Jun 3, 2026

CSX Bridge 64 over the Potomac River Client OCCI Owner CSX Railroad  Location Cumberland, Maryland  about Engineered short-duration bridge replacement using lateral slide method Falsework design Girder Erection engineering Services Provided Completion 2015...

Fore River Lift Bridge

by fourcegroup | Jun 3, 2026

Fore River Lift Bridge Client J.F. White Contracting Company Owner Massachusetts Department of Transportation Location Quincy, MA about Demolition Demolition Analysis of existing Acrow Bridge spans Stability checks and structure strengthening of barge for Manitowoc...

Burlington Approach Span Demolition

by fourcegroup | Jun 3, 2026

Burlington Approach Span Demolition Client Walsh Construction  Owner Burlington Northern Sante Fe Railroad Location Burlington, Iowa about Demolition sequencing of the six existing approach truss spans Stability analysis for truss surgical deconstruction on barges...