Home > All By Location regional map > Pittsburgh West > Greentree Road Tunnel Search pghbridges.com Search WWW Western portal Main information page Western portal at Old Washington Pike: Cut stone below spring line and on portal face, brick ceiling lining, and evidence of 18 ft extension Eastern portal: Cut stone below spring line and on portal face, brick ceiling lining Submit info or inquiry - share some facts or ask a question. Introduction -- Nearby Structures Page created: Last modified: 17-Jun-2002 View Larger Map copyright: © Bruce S. Cridlebaugh 1999-2008 All Rights Reserved