Browse Items (14 total) Tags: construction Browse All Browse by Tag Search Items Browse Map Sort by: Title Creator Date Added / 2 pages Batch plant Unknown Chuck Binna stands at the Bailey entrance to Keystone Bridge 1995 Clyde Johnson outside Roberts Tunnel 1962 1962-11 Drilling in Roberts Tunnel 1957 1957-02-20 Group outside of East portal of Olympus Tunnel 1950 1950 Keystone Bridge frame and girders shown at construction site with men in the background Simmons, W. P. 1985 Laying track in Roberts Tunnel 1957 1957-12-05 Roberts Tunnel 1959-07-30 Roberts Tunnel surge chamber 1960 1960 Roberts Tunnel surge chamber 1960 1960 Sort by: Title Creator Date Added / 2 pages Output Formats atom, dc-rdf, dcmes-xml, json, omeka-xml, rss2