Bridges

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.
Munds Park underpass at I-17, aged 53 years
The bridges over Pinewood Boulevard in Munds Park have been carrying Interstate-17 traffic for the past 53 years and now it’s time for some well-deserved reconstruction! ADOT has already begun the project that will rebuild the bridges and ramps on I-17 at Munds Park , an area just south of Flagstaff . Work started last month and is scheduled to wrap up by fall 2012.
Tearing down two bridges over I-10
In just 10 hours this past weekend, two bridges in southern Arizona were demolished in order to make way for something new. All it took was some good planning, plenty of patience from motorists, a few enormous machines, and a ton of work by crews on the sites.

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