Factory Testing Complete on DC Water’s first tunnel boring machine for the Potomac River Tunnel https://www.dcwater.com/about-dc-water/media/news/factory-testing-complete-dc-waters-first-tunnel-boring-machine-potomac

Hudson River Tunnel HRGS Project source: Gateway Development Commission press release https://www.gatewayprogram.org/wp-content/uploads/2024/08/GDC-August-1-Board-Meeting-Release-for-Website.pdf

Hudson River Tunnel, rendering of the fist tunnel Palisades from Gateway Development Commission press release: https://www.gatewayprogram.org/wp-content/uploads/2024/08/GDC-August-1-Board-Meeting-Release-for-Website.pdf

Amtrak Awards Construction Contract for East River Tunnel Rehabilitation source: Amtrak press release https://media.amtrak.com/2024/07/amtrak-awards-contract-for-east-river-tunnel-rehabilitation/

Frederick-Douglass-Tunnel-with-Electrified-Trains Amtrak media release https://media.amtrak.com/2024/02/amtrak-awards-contract-to-build-new-frederick-douglass-tunnel-in-baltimore/

Potomac River Tunnel Corridor Map is from DC Water https://www.dcwater.com/projects/potomac-river-tunnel-project

curtesy of Amtrak https://media.amtrak.com/2023/05/bp-tunnel-replacement-program-renderings/

VTA BART Phase II extension planning (VTA release)

BART Phase II Project Alignment Map (Valley Transportation Authority)

Robbins Single Shield TBM Lake Ontario (Robbins press release)