The Liberty Tunnels Ventilation System in Pittsburgh has been recognized as a National Historic Civil Engineering Landmark by the American Society of Civil Engineers. Pennsylvania Department of ...

This is an archived article and the information in the article may be outdated. Please look at the time stamp on the story to see when it was last updated. MANHATTAN, N.Y. (PIX11) — Smoke was seen ...

Unfortunately, this book can't be printed from the OpenBook. If you need to print pages from this book, we recommend downloading it as a PDF. Visit NAP.edu/10766 to get more information about this ...

WASHINGTON — Drug tunnels are not a new problem at the Southwestern border, but authorities say the number of sophisticated tunnels may be. Since November 2010, authorities have seized four complete ...

Kolkata: The work for modernisation of the air-conditioning and installation of tunnel ventilation system across the Blue Line's 15 underground stations was launched on Wednesday. This was the first ...

SEATTLE — The SR 99 tunnel is back open after a power outage shut down both directions, according to the Washington State Department of Transportation (WSDOT). WSDOT said the hourslong closure was ...