Home > All By Location regional map > Glenshaw > Etna Tunnel Search pghbridges.com Search WWW View north (downstream right) with extended retaining wall to northeast Main information page Northern portal Northern portal, including 1903 date stone and "ETNA" in brick Safety bay Southern portal, including 1903 date stone at top of arch Pine Creek at Undercliff Submit info or inquiry - share some facts or ask a question. Introduction -- Nearby Structures Page created: Last modified: 21-Apr-2003 View Larger Map copyright: © Bruce S. Cridlebaugh 1999-2008 All Rights Reserved