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)

Robbins Single Shield Lake Ontario (Robbins Press release photo)