Bridges

Interstate 10 in Arizona
The new year officially is here, but before we dive into 2012 we’re going to take a quick look back. ADOT’s Public Information/Media Relations team came up with a great list of the state’s major transportation accomplishments from 2011 and we thought we’d share it here on the blog!
False Work used during bridge construction
Last month, as part of our Building a Freeway series, we told you about the massive underground support substructures that help give bridges strength. Next up in the series is an important -- but temporary -- structure that’s used as crews build a bridge, tunnel or even a box culvert.
Mescal/J-Six Bridge
It’s been just about six months, but today the residents of Mescal and J-Six Ranch got their bridge back and can finally say goodbye to one lengthy detour!
Bridge construction
The recent quake near Washington, D.C. served as a reminder that the earth occasionally moves in U.S. locales outside of California. At ADOT, we know that Arizona is not immune to seismic activity, either.
GoPro installation under bridge
If you’ve been following along in the blog, you know that we’ve been chronicling ADOT’s reconstruction of the Mescal/J-Six bridge in southern Arizona since it was severely damaged when two semi trucks collided underneath it back in March. Completion of the fast-tracked bridge reconstruction is slated for later this month.
Oversize load crossing bridge
Now that you know a little about the ADOT permitting process involved with moving oversize loads, take a look at the latest heavy haul to cross Arizona’s highways. The video above shows just a portion of the journey this 285-ton load took beginning the first week of August.
Bridge demolition
Last week we gave you an update on how the new Mescal/J-Six bridge is coming along... You might also remember that the night the damaged bridge was taken down, the old Marsh Station bridge was also demolished just a few miles away. It was a huge project that required completely shutting down I-10 for the night.
Changing light bulbs in the Deck Park Tunnel on I-10
With roughly 240,000 vehicles driving through it each day, the I-10 Deck Park Tunnel needs the night off every once in a while for a good, thorough scrub! Just about every four months, the tunnel is closed to traffic in order to allow crews the chance to wash the walls, maintain the ventilation systems and check on the tunnel’s 3,700 light fixtures (about 150-200 light bulbs are changed out each quarter!).
Crews put the finishing touches on the shoring that will support the pier cap on the newly  reconstructed columns
The new Mescal Road/J-Six interchange is taking shape! The Cochise County bridge will soon reunite two communities that were unexpectedly disconnected after trucks collided beneath the old overpass in March.
Bridge mid-construction - caption: Construction begins July 2011
Talk about a quick turnaround … it’s been just three months since a fiery crash destroyed the Mescal Road/J-Six Ranch Road bridge in Cochise County and already ADOT has approved a contract to rebuild and reopen the bridge this fall.

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