Granite Awarded $45 Million Atlantic Base Refurbishment Project for King County Metro

GVA
October 03, 2025

Granite Construction announced the commencement of the approximately $45 million Atlantic Base Refurbishment (ABR) project in Seattle, Washington. This comprehensive initiative aims to modernize and enhance the infrastructure of King County Metro’s (KCM) six-acre trolley bus parking and maintenance facility.

The project, utilizing the General Contractor/Construction Manager (GC/CM) delivery method, will replace all concrete paving and underground infrastructure, including storm drainage, sanitary sewer, industrial waste, and buried power lines. It also involves rehabilitating underground storage tanks and upgrading the existing overhead catenary system to support KCM’s expanding electric trolley fleet.

The ABR project will be executed in multiple phases to ensure uninterrupted operation of KCM’s Atlantic Base. Construction is expected to begin in January 2025 and is scheduled for completion in March 2027, contributing to Granite's project pipeline.

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