U.S. Route 89 in Arizona

U.S. Route 89
Route information
Maintained by ADOT, City of Flagstaff
Length:	136.49 mi[1] (219.66 km)
Major junctions
South end:	I-40 BL / US 180 in Flagstaff
	SR 64 in Cameron US 160 near Tuba City US 89A near Bitter Springs
North end:	US-89 northwest of Page
Highway system
United States Numbered Highway System List Special Divided Replaced Arizona Highways Interstate U.S. State Unconstructed Former ← SR 88 SR 89 →

U.S. 89 crossing Glen Canyon

U.S. 89 near Flagstaff

In the U.S. state of Arizona, U.S. Route 89 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

Directional colored shields found on US 89 during the 1950s.

Prior to 1992,^[2] the southern terminus of US 89 was at Nogales, Arizona. US 89 ran concurrently with Interstate 19 (I-19) until Green Valley. The route was taken (in a northerly direction) through Tucson via 6th Avenue, Congress Street and Granada Avenue. The route was carried out of Tucson via State Route 77 (SR 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,^[3] 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.^[4]

On February 20, 2013,^[5] the main alignment of US 89 was closed in both directions approximately 25 miles (40 km) south of Page due to a landslide that caused the roadway to buckle and subside. Traffic was re-routed via 45 miles (72 km) of secondary and tertiary roads on the Navajo Reservation. Alternate routes through Las Vegas, Nevada, or Hurricane, Utah, and Marble Canyon (US 89A) were also suggested.^[6] US 89T (see below) 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.^[5]

Junction list

The entire route is in Coconino County.

Location	mi[1]	km	Destinations	Notes
Flagstaff	0.00	0.00	I-40 BL / US 180 to I-40 / I-17 – Flagstaff, Phoenix, Albuquerque	National southern terminus
​	46.76	75.25	SR 64 – Grand Canyon
​	62.32	100.29	US 160 – Tuba City, Kayenta
​	105.13	169.19	US 89A north – Jacob Lake, Fredonia
Page	127.13	204.60	SR 98 east to US 160 – Kayenta
​	137.77	221.72	US-89	Utah state line
1.000 mi = 1.609 km; 1.000 km = 0.621 mi

US 89T

U.S. Route 89T (US 89T) was the designation for Navajo Route 20 (N20), a 44-mile (71 km) road running mostly parallel to U.S. 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 need for US 89T arose in February 2013, when a geological event caused a 150-foot (46 m)^[7] stretch of US 89 25 miles (40 km) south of Page to buckle. 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.^[8] Motorists were rerouted on a 115-mile (185 km) detour via US 160 and SR 98 or a 90-mile detour on N20, which had a 28-mile (45 km) 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 (ADOT) added the road to the state highway system as US 89T and quickly moved to get money ($35 million from the Federal Highway Administration's emergency relief project fund) 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.^[9][10] In addition to pavement, right-of-way and fencing to separate the road from the local livestock population were required.^[11] The improved road opened to traffic on August 29, 2013. Plans call for the road to be used for three years before the road reverts to Bureau of Indian Affairs jurisdiction.^[12]

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 25 miles per hour (40 km/h).^[9] As of October 15, US-89T restrictions were lifted following the installation of upgraded control features.^[13]

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 Reservation in April 2015.^[14]

See also

• U.S. Route 89A
• Arizona State Route 89
• Arizona State Route 89A

References

External links

• US 89 Landslide at ADOT

U.S. Route 89
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