Utah Airport Viaduct Demolition

The Challenge:

An initial phase of the extensive Airport TRAX Line construction in Salt Lake City included demolition of the North Temple viaduct. The complicated demolition and removal of this heavily-trafficked bridge required precision and expertise as it ran 1800’ in length over the UTA (Utah Transit Authority) tracks, UPRR (Union Pacific Railroad) tracks, and the entire length of the City Creek Culvert structure throughout downtown Salt Lake City. These challenging obstacles required that every action be meticulously planned so as not to disturb or damage them, as well as to keep the vibration of the surrounding structures to an absolute minimum during the project. Furthermore, the demolition and removal was to be completed within a 60 day period.

The Implementation:

Penhall Company won the project bid and used several different techniques to complete the bridge demolition and removal. Some of the methods used included sawing and lifting of concrete deck panels, utilization of 1 and 2 crane girder lifts, and pulverizing of deck concrete to ensure no damage was made to the tracks or culvert below. Penhall Company also successfully coordinated with public events on the surrounding properties and streets to guarantee a smooth working schedule, and protected all utilities during the entirety of the project.

The Result:

Penhall Company demolished the entire bridge within 51 days, including a 2 week delay due to right-of-way access, with zero accidents and within budget. Penhall also recycled 100% of the concrete from the bridge and 99% of the structural steel and rebar. Their success in completing the project on time and on budget, in addition to their environmental responsibility and societal awareness, proves once again that Penhall Company is the expert in concrete demolition and removal projects.

Bridge Details:

1800' X 80'
9200 CY
1900 TN Structural Steel
1000 TN Reinforcing Steel

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