PROFILBARU.COM

U.S. Route 466
U.S. Route 466
Location	Hoover Dam to Kingman
Length	72.59 mi (116.82 km)
Existed	1935–1971

Future Interstate 11
Future Interstate 11
Location	Nogales – Arizona–Nevada state line

U.S. Route 93
U.S. Route 93
	US 93 highlighted in red; SR 93X and US 93 Spur in blue
Route information
	Maintained by ADOT
Length	199.38 mi (320.87 km) Includes I-40 overlap of 22.83 miles (36.74 km)
Existed	June 17, 1935–present
History	1935: extended to Kingman with US 466; 1965: Extended to US 89 at Congress Junction; 1992: Extended to Wickenburg;
Tourist; routes	Joshua Forest Scenic Road
Major junctions
South end	US 60 in Wickenburg
	I-40 in Kingman
North end	I-11 / US 93 at Nevada state line
Location
Country	United States
State	Arizona
Counties	Maricopa, Yavapai, Mohave
Highway system
	United States Numbered Highway System; List; Special; Divided; Arizona State Highway System; Interstate; US; State; Proposed; Former;

U.S. Route 93 (US 93) is a United States Numbered Highway in the state of Arizona that begins in Wickenburg and heads north to the Nevada state line at the Mike O'Callaghan–Pat Tillman Memorial Bridge. The total length of US 93 in Arizona is 199.38 miles (320.87 kilometres). Between Wickenburg and Interstate 40 (I-40), part of US 93 is designated as the Joshua Forest Scenic Byway. While most of US 93 is a four-lane divided highway, sections of the highway between Wickenburg and I-40 are still narrow two-lane roads, gradually being upgraded to match the rest of the route. As part of a proposal by municipal leaders in Nevada and Arizona, the highway could be replaced by Interstate 11 (I-11).

Most of US 93 from Hoover Dam to Kingman was originally designated as State Route 69 (SR 69) and was later re-designated as the easternmost part of US 466 in 1935. US 93 was extended into Arizona along US 466 to Kingman the same year. Until 1965, the route from US 89 (now SR 89) in Wickenburg to Kingman was designated as SR 93. The remainder of the route to US 60 Wickenburg was part of US 89 until the designation was truncated to Flagstaff, Arizona 1992. US 93 was extended over the former route of US 89, to its current terminus at US 60.

Route description

The southern terminus of US 93 is located at a junction (rebuilt and relocated between February 2008 and February 2010) with US 60 in Wickenburg, a small town about 50 miles (80 km) northwest of Phoenix. It heads towards the northwest from this junction to an intersection with SR 89 (former US 89) across the Maricopa – Yavapai county line just northwest of town. SR 89 heads northeast to Prescott while US 93 continues its northwesterly heading, as a mainly two-lane highway with passing lanes every few miles. US 93 continues to the northwest to a junction with SR 71 at a diamond interchange southwest of Congress. As it continues to the northwest through this scenic but remote rural area, the highway is known as the Joshua Forest Parkway of Arizona.

The highway widens to four lanes at the Santa Maria River and continues towards the northwest past a junction with SR 97 on its way to the town of Wikieup. Before reaching that town, it passes the tiny settlement of Nothing (just across the Yavapai – Mohave county line) and crosses Burro Creek over dual steel arch bridges, which are located about 400 feet (120 metres) above the intermittent waterway.

After passing through Wikieup, US 93 curves north to follow the western edge of the Big Sandy River and one of its tributaries, Knight Creek, on its way toward Interstate 40 (I-40).

At I-40's exit 71, US 93 merges with the Interstate freeway and shares the same alignment heading west until they reach Kingman. The two split in Kingman with I-40 heading towards the south to skirt the southern end of the Black Mountains before curving west and into California and US 93 heading northwest towards Las Vegas. A project is currently underway to design and build a free-flowing connection between I-40 and US 93 in the western section of Kingman, to avoid the current diamond interchange (exit 48) at Beale Street and the approximately one-mile section of congested, undivided roadway that US 93 motorists must navigate before the road widens back into a four-lane divided facility.

Northwest of Kingman and just over Coyote Pass, US 93 has an interchange with SR 68 (exit 67). This junction incorporates a large Commercial Vehicle Inspection Station (CVIS), which ADOT calls a "Port of Entry" (POE), for southbound and eastbound commercial traffic. Highway 68 heads west over the Black Mountains to Davis Dam, Laughlin, and Bullhead City (the latter via SR 95), while US 93 continues as a four-lane divided route towards the northwest. Running through the long Detrital Valley, with the Black Mountains to the west and the Cerbat Mountains and then the White Hills to the east, US 93 passes several small settlements in this most remote area. As it nears the Nevada state line, it enters the Lake Mead National Recreation Area and climbs over Householder Pass, before crossing into Nevada via the Mike O'Callaghan–Pat Tillman Memorial Bridge over the Black Canyon just downstream of the Colorado River from Hoover Dam.

US 93 continues into Nevada to the cities of Boulder City, Henderson and Las Vegas as part of Interstate 11 (I-11).^[2]^[3]

History

The route between Kingman and Hoover Dam first became part of the state highway system on June 18, 1934, when it was designated as SR 69.^[5] At the time, Hoover Dam was still under construction and the highway did not link to Nevada. The dam was completed the following year in 1935 enabling traffic to cross over the top of the dam.^[6] In that year, U.S. Route 466 (US 466) was designated over SR 69 from Kingman to Hoover Dam. US 93 was extended south from (then) US 91 at Glendale, Nevada later the same year.^[7] Although the US 466 designation had been approved by the American Association of State Highway Officials (AASHO) from Glendale to Kingman on October 9, 1933, the Arizona State Highway Department had waited until May 16, 1935, before retiring SR 69 and re-designating it as US 466.^[8]^[9] US 466 was joined by US 93 on June 17, 1935, after AASHO approved an extension of the latter route from US 91 north of Las Vegas, Nevada to Kingman.^[10]

Directional colored shields found on US 93 during the 1950s.

In 1935, Arizona proposed an extension of US 93 from Kingman to Ash Fork, overlapping US 66, and then south to Phoenix. This proposal was protested by the towns of Aguila and Wickenburg that argued that US 93 should pass through their towns rather than the proposed alignment to the east. The town of Wickenburg contested that a direct routing between Phoenix and Kingman would be 100 miles (161 km) shorter than the routing through Ash Fork and that it would provide a necessary connection between Phoenix, the state capital and the northwestern part of the state. Until 1937, the originally proposed extension overlapping US 66 stayed in planning as US 93T. Another route, US 193, was also planned, traveling from Phoenix through Sacaton and Casa Grande before terminating in Picacho. US 193 was briefly reworked under the designation US 93A before the proposal was abandoned in 1937.^[7]

On March 23, 1946, what would become the southern leg of US 93 past Kingman was added to the State Highway System as State Route 93.^[11] Between 1942 and 1958, the highway was rebuilt and reworked into a suitable highway for an eventual extension of US 93.^[12]^[7] Though the state wanted US 93 to be extended over all of SR 93 through Phoenix, Casa Grande and Tucson to the Mexico border in Nogales, a southern extension was only accepted by the AASHTO to US 89 north of Wickenburg in 1965.^[7] The rest of SR 93 kept its state route designation until 1984.^[13] On December 3, 1971, the entirety of US 466 was decommissioned, upon request by the states of Arizona and Nevada. This left US 93 as the sole designation between Kingman and Las Vegas.^[14]

Until 1992, US 93 ended a short distance north of Wickenburg, Arizona at a junction with U.S. Route 89. When US 89 was decommissioned in the area, the US 93 designation was carried on into Wickenburg.

Between 2006 and 2012, several widening projects were completed on the section between Wickenburg and Interstate 40.

New bypass bridge

US 93 (with US 60 to the southeast of Wickenburg) is the shortest route between the fast-growing cities of Las Vegas and Phoenix, two of the largest cities in the Southwest (and is an officially designated portion of the CANAMEX Corridor). Upgrades of US 60 and US 93 to four-lane freeway status are scheduled between Las Vegas and Phoenix; as of 2019, most sections north of the Santa Maria River are already at four-lane expressway status (with some of the newest portions presumably built to Interstate standards) with construction ongoing. This routing is part of Interstate 11 (I-11) which is connected with Interstate 215 (I-215), Interstate 515 (I-515), U.S. Route 95 (US 95) and State Route 564 (former SR 146) at the Henderson Spaghetti Bowl (also known as the "Hender-Bender") interchange in Henderson, Nevada and will connect Interstate 10 in Tonopah.

A segment of this new highway consists of a new route across the Colorado River called the Hoover Dam Bypass. The new crossing is the Mike O'Callaghan–Pat Tillman Memorial Bridge, the first so-called concrete-steel composite arch bridge built in the United States. The bridge is 1,900 feet (579 m) with a 1,080-foot (329 m) main span. The roadway is 840 feet (256 m) above the Colorado River.

The bypass replaced the old section of US 93 that approached and crossed directly over Hoover Dam, which was inadequate by modern standards because there was one narrow lane in each direction, including several hairpin turns, many dangerous curves, and poor sight distances. Also, in the wake of the September 11, 2001 attacks, truck traffic over the Hoover Dam had been diverted south to a river crossing near Laughlin, Nevada via State Route 68, State Route 163 in Nevada and US 95, to safeguard the dam from hazardous spills or explosions.

Junction list

Mileposts start at the Nevada state line, and are based on the mileposts of former US 466.

County	Location	mi^[2]	km	Exit	Destinations	Notes
Maricopa	Wickenburg	199.38	320.87		US 60 (Wickenburg Way) – Phoenix, Wickenburg, Los Angeles	National southern terminus; roundabout; former US 89 / SR 93 south
Yavapai		193.36	311.18		SR 89 north / Matthie Ranch Road – Congress, Prescott	Former US 89 north; southern terminus of SR 89
		182.66	293.96		SR 71 – Prescott, Los Angeles	Interchange
		155.01	249.46		SR 97 north – Bagdad, Hillside	Southern terminus of SR 97
Mohave		92.72– 92.44	149.22– 148.77		I-40 east – Flagstaff	Southern end of I-40 concurrency; I-40 exit 71
	US 93 travels concurrently with I-40
	Kingman	69.85– 69.77	112.41– 112.28		I-40 west / Beale Street (US 93 Spur) – Los Angeles	Northern end of I-40 concurrency; US 93 Spur is former US 466 east; I-40 exit 48; to be replaced by semi-directional T interchange 1⁄2 mile (800 m) north of current interchange (northbound left exit and southbound left entrance)^[15]
	Kingman			69^[15]	Beale Street to I-40 west – Los Angeles	Future interchange; to be southbound exit and northbound entrance^[15]
	Golden Valley	65.79	105.88	67	SR 68 west – Bullhead City, Laughlin	Interchange; all southbound commercial vehicles must use exit ramp to access inspection station; eastern terminus of SR 68
		0.66	1.06	2	Kingman Wash Access Road (SR 93X)	Former US 93 north/US 466 west; south end of freeway
Colorado River		0.00	0.00	Mike O'Callaghan–Pat Tillman Memorial Bridge
Colorado River		0.00	0.00		I-11 north / US 93 north	Continuation into Nevada
1.000 mi = 1.609 km; 1.000 km = 0.621 mi Concurrency terminus Unopened

Special routes

US 93 has two special/bannered routes within the state of Arizona.^[2]

Hoover Dam temporary route

State Route 93T

Location	Hoover Dam
Length	2.13 mi^[2]^: 569 (3.43 km)
Existed	2011–present

State Route 93 Temporary (SR 93T or SR 93X) is an unsigned 2.13-mile (3.43 km) long state highway near the Hoover Dam in Mohave County.^[2] The route was originally part of the US 93 segment that travelled over Hoover Dam. It was redesignated as SR 93X on January 1, 2011, following the completion of the Hoover Dam Bypass. Unlike most unrelinquished sections of U.S. Highways in Arizona, the old Hoover Dam route was given a state route designation instead of a U.S. Highway one.^[16] SR 93X is not related in any way to SR 93, which was the original designation of US 93 between Kingman and Wickenburg, as well as a failed extension of US 93 from Wickenburg to Nogales.^[7] The route begins at the Nevada state line on the Hoover Dam, heading southeast, before switch-backing up a hillside at the southeastern end of the dam.^[17] ADOT ownership of SR 93X begins exactly 1-mile (1.6 km) southeast of the Hoover Dam on Kingman Wash Access Road near the Arizona side Hoover Dam Lookout.^[2] The route proceeds southeasterly along Kingman Wash Access Road, crossing under US 93 less than a mile from the lookout. Approximately 2.13 miles (3.43 km) from its western terminus, SR 93 arrives at a freeway interchange with US 93, which also serves as its eastern terminus. Currently, the majority of SR 93X is gated off to public traffic. The western first 1.01 miles (1.63 km) of the route and Arizona side of the Hoover Dam are still accessible to public traffic, but can only be reached via US 93, SR 172 and Hoover Dam Access Road through Nevada. There is currently no open road for motorists to leave the Arizona side of the Dam, whilst remaining in the state.^[18]

Major intersections

The entire route is in Mohave County.

Location	mi^[2]^: 569	km	Destinations	Notes
Colorado River	0.00	0.00	Hoover Dam Access Road to SR 172 west	Continuation into Nevada; former US 93 north/US 466 west
Colorado River	0.00	0.00	Hoover Dam
	1.01	1.63	Beginning of ADOT ownership
	2.05– 2.13	3.30– 3.43	US 93 – Hoover Dam, Las Vegas, Kingman	Eastern terminus; US 93 exit 2; future I-11; former US 466 east
1.000 mi = 1.609 km; 1.000 km = 0.621 mi Route transition

Kingman spur route

U.S. Route 93 Spur

Location	Kingman
Length	0.38 mi^[2]^: 660 (610 m)
Existed	2009–present

U.S. Route 93 Spur (US 93 Spur) is a 0.38-mile (0.61 km) long unsigned spur route of US 93 in Kingman.^[2] Originally a small section of US 66, it became part of the Kingman I-40 Business Loop (I-40 BL) on October 26, 1984, upon the decommissioning of the former highway in Arizona.^[19] The majority of I-40 BL was retired to the city of Kingman in 2002, with two sections, each less than a mile long, remaining under ADOT ownership at I-40 exits 48 and 53 respectively.^[20] On September 18, 2009, the I-40 BL designation was decommissioned. The two remaining segments owned by ADOT became a minor southwestern extension of SR 66 and a new route designated US 93 Spur.^[21] US 93 Spur begins at an intersection with I-40 and US 93 at Beale Street and I-40 exit 48. The unsigned spur route continues west on Beale Street, ending about three blocks east of I-40 and US 93 at an intersection with "Route 66", Grandview Avenue and Beale Street in front of Locomotive Park.^[22]

Major intersections

The entire route is in Kingman, Mohave County.

mi^[2]^: 660	km	Destinations	Notes
71.04– 71.13	114.33– 114.47	I-40 / US 93 (Beale Street) – Los Angeles, Flagstaff, Phoenix, Las Vegas	Western terminus; I-40 exit 48; former US 466 west
71.33	114.79	Grandview Avenue / Beale Street / Route 66 to Historic US 66	Eastern terminus; former I-40 BL east and US 466 east
1.000 mi = 1.609 km; 1.000 km = 0.621 mi

References

^ Arizona Department of Transportation (2014). "Arizona Parkways, Historic and Scenic Roads" (PDF). Phoenix: Arizona Department of Transportation. Retrieved September 11, 2018.
^ ^a ^b ^c ^d ^e ^f ^g ^h ⁱ ^j ^k Roadway Inventory Management Section, Multimodal Planning Division (December 31, 2013). "2013 State Highway System Log" (PDF). Arizona Department of Transportation. Retrieved October 8, 2019.
^ "Overview map of US 93 in Arizona" (Map). Google Maps. Retrieved May 1, 2008.
^ Planning Survey Division (July 1, 1965). "1965-1966 Arizona Highway Sufficiency Rating; Route Log Showing Sufficiency Ratings For Each Section" (PDF). Arizona State Highway Department. Retrieved June 20, 2023 – via Arizona Memory Project.
^ "History of the Arizona State Highway Department" (PDF). Arizona State Highway Department and United States Public Roads Administration. June 1939. Retrieved May 18, 2023 – via Arizona Memory Project.
^ Bureau of Reclamation. "Hoover Dam Chronology". Archived from the original on September 28, 2010. Retrieved May 1, 2008.
^ ^a ^b ^c ^d ^e Weingroff, Richard. "U.S. 93 Reaching For The Border". Federal Highway Administration. Retrieved May 1, 2008.
^ U.S. Route Numbering Committee (1933). [Report of the U.S. Route Numbering Committee to the Executive Committee] (PDF) (Report). Washington, DC: American Association of State Highway Officials. p. 34. Retrieved June 20, 2023 – via Wikimedia Commons. ARIZONA-NEVADA-CALIFORNIA. U.S. No. 466. ARIZONA, beginning at Kingman, via State Route 69 to Boulder Dam. NEVADA, beginning at Boulder Dam via State Route 26 west to a junction with U.S. Route 91 in Las Vegas, then via U.S. 91 to the California state line. CALIFORNIA, from the California state line on U.S. 91 thence over U.S. 91 to Barstow, thence via Mojave, Tehachapi, Bakersfield, Famosa, Wasco, Atascadero to Morro.
^ Arizona State Highway Department (May 16, 1935). "ADOT Right-of-Way Resolution 1935-P-216". Retrieved June 21, 2023 – via Arizona Highway Data. ESTABLISH ROUTE OF HWY FROM LAS VEGAS TO BOULDER, NEVADA, S ON S.R.69 TO U.S. 66 AT KINGMAN
^ U.S. Route Numbering Committee (1935). [Report of the U.S. Route Numbering Committee to the Executive Committee] (PDF) (Report). Washington, DC: American Association of State Highway Officials. p. 39. Retrieved June 20, 2023 – via Wikimedia Commons. U.S. Route 93, Arizona. Paragraph 39 should be changed to read as follows: The request for an extension of U.S. 93 to Kingman, Arizona, was approved – it being the understanding that this route would be developed southeastward at the earliest opportunity. (Agenda to the Minutes of Executive Committee; June 17, 1935)
^ Arizona State Highway Department (March 23, 1946). "ADOT Right-of-Way Resolution 1946-P-273". Retrieved June 4, 2015 – via Arizona Highway Data.
^ Arizona State Highway Department (August 21, 1942). "ADOT Right-of-Way Resolution 1942-P-009". Retrieved June 5, 2015 – via Arizona Highway Data.
^ Arizona Department of Transportation (December 17, 1984). "ADOT Right-of-Way Resolution 1984-12-A-084". Retrieved June 15, 2018 – via Arizona Highway Data.
^ U.S. Route Numbering Subcommittee (December 3, 1971). "U.S. Route Numbering Subcommittee Agenda" (Report). Washington, DC: American Association of State Highway Officials. p. 419. Retrieved June 20, 2023 – via Wikisource. Eliminate the U.S. 466 designation between the intersection of US 66 in Kingman, Arizona to the intersection of I-15 in Baker, California.
^ ^a ^b ^c "US 93, I-40 West Kingman Traffic Interchange Project". Arizona Department of Transportation. Retrieved August 30, 2020.
^ Arizona Department of Transportation (January 21, 2011). "ADOT Right-of-Way Resolution 2011-01-A-003". Retrieved October 15, 2019 – via Arizona Highway Data. Authorize the re-designation of a portion of U.S. 93 as S.R. 93X due to completion of the Hoover Dam Bypass. PR. Resolution dated 05/23, 05/24, & 05/25/34, page 624; Resolution dated 06/18/34, page 695; Resolution 05/16/35, page 216; Resolution dated 12/15/44, page 32. S-3,10 & 11; T-30N; R-23W.
^ Arizona Department of Transportation, Multimodal Planning Division (2015). "State Highway System (ArcGIS)". Arizona Department of Transportation. Retrieved August 1, 2018.
^ "Hoover Dam Area Map" (Map). Google Maps. Retrieved October 8, 2019.
^ Staff (October 26, 1984). "ADOT Right-of-Way Resolution 1984-10-A-064". Arizona Department of Transportation. Retrieved May 6, 2015. Delete U.S. 66 route designation, renumbering existing portions. See also 84-10-A-63, 65, 66 & 67.
^ Multimodal Planning Division, Data Bureau Staff (December 31, 2008). "2008 State Highway System Log" (PDF). Arizona Department of Transportation. Retrieved October 8, 2019.
^ Staff (September 18, 2009). "ADOT Right-of-Way Resolution 2009-09-A-055". Arizona Department of Transportation. Retrieved May 6, 2015. Redesignate and renumber portions of State Route 40B to U.S. Route 93 and State Route 66: PR: 09/09/27, p26; 84-10-A-063; and various Resolutions thereafter.
^ "Map of Kingman, Arizona" (Map). Google Maps. Retrieved October 8, 2019.