One South Church (UniSource Energy Tower)
1 S. Church Avenue
Tucson, Pima County, Arizona, 85701
One South Church Street is the tallest building in Tucson and 13th tallest in Arizona. The building is 330 feet tall (100.584 meters) and 25 floors. It was designed by Fentress Bradburn Architects Ltd. in 1988.
UniSource Energy no longer occupies most of the floors of the building, this compared to the 10 the company did when the tower was built. Starting in early 2012, UniSource Energy moved to its new headquarters in the UniSource Energy Building.
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