U.S. Route 89 in Arizona


U.S. Route 89 in the U.S. state of Arizona is a U.S. Highway that begins in Flagstaff and heads north to the Utah border northwest of Page.

Route description

U.S. 89 begins at Flagstaff, Arizona. The highway proceeds north passing near Grand Canyon National Park and through the Navajo Nation. Near the Utah state line the highway splits into U.S. 89 and U.S. Route 89A. The Alternate is the original highway; what is now the main highway was constructed in the 1960s to serve the Glen Canyon Dam. The two highways rejoin in Kanab, Utah.
The main branch passes over the Colorado River just south of the Glen Canyon Dam and Lake Powell near Page then enters Utah. The Alternate branch crosses the Colorado River at Navajo Bridge and proceeds to the North Rim of the Grand Canyon before entering Utah.

History

Prior to 1992, the southern terminus of US 89 was at Nogales, Arizona. US 89 ran concurrently with Interstate 19 until Green Valley. The route was taken through Tucson via 6th Avenue, Congress Street and Granada Avenue. The route was carried out of Tucson via State Route 77. Further north it was carried via the Pinal Pioneer Parkway northwest out of Oracle Junction on SR 79. In Maricopa County, it ran concurrently with existing US 60 along Main Street in Mesa, Apache Boulevard and Mill Avenue in Tempe, then along Van Buren Street in Phoenix to Grand Avenue, then to Wickenburg. Departing Wickenburg, it followed US 93 and SR 89 to Prescott. Departing Prescott, the route followed present-day SR 89 to Ash Fork, then ran east concurrently with I-40 to Flagstaff.
In Flagstaff, US 89 ran along old Route 66, Milton Road and Santa Fe Avenue. The highway crossed the Little Colorado River at Cameron on the Cameron Suspension Bridge until 1959, when the bridge was retired and replaced by a parallel span.
On February 20, 2013, the main alignment of US 89 was closed in both directions approximately south of Page due to a landslide that caused the roadway to buckle and subside. Traffic was re-routed via of secondary and tertiary roads on the Navajo Reservation. Alternate routes through Las Vegas, Nevada, or Hurricane, Utah, and Marble Canyon were also suggested. US 89T opened in August 2013 as a bypass of the closed section, utilizing Navajo Route 20 as an alignment.
U.S. 89 reopened in March 2015 after a $25 million repair project.

Major intersections

U.S. Route 89T

U.S. Route 89T was the designation for Navajo Route 20 , a road running mostly parallel to US 89 in Arizona. Added to the Arizona state highway system in 2013, US 89T served as a temporary detour for a closed section of US 89. The route was long.
The need for US 89T arose in February 2013, when a geological event caused a stretch of US 89 to buckle south of Page. The loss of this stretch of road forced detours for traffic entering the Page area from the south. The Navajo Nation declared a state of emergency. Motorists were rerouted on a detour via US 160 and SR 98 or a detour on N20, which had a unpaved stretch. At the same time, commute times into Page increased, and merchants in Page and the surrounding area lost significant business.
The Arizona Department of Transportation added the road to the state highway system as US 89T and quickly moved to get money and equipment to pave the road. As the Navajo had wanted to pave N20 for decades, and some design and environmental clearances had already been obtained, it took just 79 days to pave N20 in a project that might have otherwise taken more than a year. In addition to pavement, right-of-way and fencing to separate the road from the local livestock population were required. The improved road opened to traffic on August 29, 2013. Plans called for the road to be used for three years before the road reverted to Bureau of Indian Affairs jurisdiction.
Initially, the route lacked proper fencing, cattle guards, and pavement markings to support safe travel at higher speeds. As a result, US 89T was open to local traffic only at night, and posted speed limits as low as.
As of October 15, US 89T restrictions were lifted following the installation of upgraded control features.
With the reopening of mainline US 89 in March 2015, the US 89T designation was retired and ownership of the route returned to the Navajo Nation in April 2015. The route from The Gap to SR 98 is currently designated only as N20.
;Major intersections