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 I-70 Tunnel: Eastbound Closure 10/09 |  I-70 Tunnel: Girder Set 10/09 |  I-70 Tunnel Trench Box 9/09 |  I-70 Tunnel Inside Trench Box 9/09 |  I-70 Tunnel: Eastbound Closure 10/09 |  I-70 Tunnel: Eastbound Closure 10/09 |  I-70 Tunnel: Westbound Closure 11/09 |  I-70 Tunnel: Westbound Closure 11/09 |  I-70 Tunnel: Westbound Closure 11/09 |  I-70 Westbound Closure 11/09 |  I-70 Tunnel Walls 06/10 |  I-70 Tunnel 9/11 |  I-70 Tunnel Excavation 08/10 |  I-70 Tunnel Construction 8/10 |  I-70 Tunnel Retaining Walls 10/10 |  I-70 Tunnel Wall Construction 12/10 |  Skeleton Track: I-70 Tunnel 2/11 |  I-70 Tunnel 6/11 |  Union Boulevard Tunnel September 2011 |  Union Boulevard Tunnel August 2011 |  Union Boulevard Tunnel July 2011 |  Union Boulevard Tunnel April 2010 |  Union Boulevard Tunnel July 2011 |  Union Boulevard Tunnel April 2010 |  Union Tunnel 11/11 |  Union Boulevard Tunnel 9/11 |  Union Tunnel Work 9/11 |  Union Tunnel Work 9/11 |  Union Tunnel 2/12 |  Union Tunnel 2/12 |  Union Tunnel 2/12 |  Union/Simms Tunnel 9/11 |  Union Tunnel digout 10/11 |  Union Tunnel 11/11 |  Union Tunnel 11/11 |  Union Tunnel 11/11 |  Union Tunnel 11/11 |  Union Tunnel East 12/11 |  Union Tunnel 1/12 |  Union Tunnel 1/12 |  Union Tunnel 1/12 |  Union Tunnel 3/12 |  Union Tunnel 3/12 |  Union Tunnel 3/12 |  Union Tunnel 3/12 |  Union Tunnel 4/12 |
