Northwest District Projects

State Route 89: Hell Canyon Bridge

Hell Canyon bridge replacement construction is underway north of Paulden

ADOT to construct wider bridge while limiting SR 89 traffic impacts during construction

SR 89 Hell Canyon Bridge Replacement Flyer

While the Arizona Department of Transportation completed interim repairs to the Hell Canyon Bridge in 2013, the agency moved forward with plans to design a new bridge along State Route 89 in Yavapai County that would ultimately replace the aging and narrow bridge that does not meet today’s design standards. ADOT began construction in July 2015 on a modernized bridge that will replace the current bridge when completed.

The existing nearly 600-foot-long bridge, which was built in 1954, is located 18 miles north of Chino Valley at milepost 346 and serves as a key connection linking Prescott and northern Arizona (Interstate 40 in Ash Fork).

The $14.4 million improvement project includes construction a new four-span steel-plate girder bridge to the east of the existing bridge and removing the existing three-span steel deck truss bridge, which has been classified as structurally deficient by bridge inspectors. The current bridge is safe; however, some needed repairs or improvements have been identified during bridge inspections.

The new 665-foot-long two-lane bridge will feature wider travel lanes and will be approximately 47 feet wide, more than 17 feet wider than the current bridge. The bridge will also accommodate heavier loads, ensuring commercial trucks can conveniently carry goods and produce to their final destinations, particularly when I-40 traffic is diverted onto SR 89 during serious crashes.

There will be limited traffic impacts to motorists during construction because traffic will remain on the existing bridge, while work progresses on constructing the new bridge east of the current bridge. 

After the new bridge is completed, traffic will be switched to the new bridge. The existing Hell Canyon Bridge will then be dismantled and removed, which is expected to take up to three months. Additional road construction/realignment will be necessary to the north and south of the new bridge. 

View the old Hell Canyon Bridge implosion video

View the project animation.


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Civil RightsTitle VI of the Civil Rights Act of 1964, and the Americans with Disabilities Act (ADA)

Pursuant to Title VI of the Civil Rights Act of 1964, and the Americans with Disabilities Act (ADA), ADOT does not discriminate on the basis of race, color, national origin, age, sex or disability. Persons that require a reasonable accommodation based on language or disability should contact ADOT’s Civil Rights Office at Requests should be made as early as possible to ensure the State has an opportunity to address the accommodation.

De acuerdo con el título VI de la Ley de Derechos Civiles de 1964 y la Ley de Estadounidenses con Discapacidades (ADA por sus siglas en inglés), el Departamento de Transporte de Arizona (ADOT por sus siglas en inglés) no discrimina por raza, color, nacionalidad, edad, género o discapacidad.  Personas que requieren asistencia (dentro de lo razonable) ya sea por el idioma o por discapacidad deben ponerse en contacto con la Oficina de Derechos Civiles en Las solicitudes deben hacerse lo más pronto posible para asegurar que el equipo encargado del proyecto tenga la oportunidad de hacer los arreglos necesarios.