Potomac River Tunnel

Potomac River Tunnel TBM Fully Assembled
TBM Staff
September 9, 2026
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News
TBM Launched for Potomac River Tunnel
April 10, 2026
News
DC Water Hosts Ceremonial Launch of Potomac River Tunnel TBM
November 5, 2025
News
DC Water to Hold Ceremonial Blessing for Potomac River Tunnel TBM
October 30, 2025
News
Potomac River Tunnel Begins Controlled Underground Blasting
June 4, 2025
News
Potomac Tunnel Project Underway: CBNA, Halmar, COWI & Hatch Join...

CBNA, Halmar, COWI and Hatch announced a partnership aimed at providing unparalleled expertise in tunnel construction an...

February 16, 2024
News
National Park Service Approves DC Water’s Potomac River Tunnel

The National Park Service (NPS) has completed an Environmental Assessment (EA) and approved DC Water’s proposal to...

April 16, 2020