National Bridge Inventory: Arizona



  • Of the 8,428 bridges in the state, 132, or 1.6 percent, are classified as structurally deficient. This means one of the key elements is in poor or worse condition.
  • This is down from 181 bridges classified as structurally deficient in 2016.
  • The deck area of structurally deficient bridges accounts for 1.6 percent of total deck area on all structures.
  • 15 of the structurally deficient bridges are on the Interstate Highway System. A total of 82.6 percent of the structurally deficient bridges are not on the National Highway System, which includes the Interstate and other key roads linking major airports, ports, rail and truck terminals.
  • 202 bridges are posted for load, which may restrict the size and weight of vehicles crossing the structure.
  • The state has identified needed repairs on 1,716 bridges at an estimated cost of $3.3 billion.
  • This compares to 2,365 bridges that needed work in 2016.

County Year Built Daily Crossings Type of Bridge Location
Cochise 1960 78,972 Rural minor arterial SR 80 over San Pedro River
Pima 1965 62,396 Urban Interstate I 10; EB over Ruthrauff Rd
Maricopa 1976 48,700 Urban other principal arterial Shea Blvd over Indian Bend Wash
Pima 1965 44,724 Urban Interstate I 10; EB over Ajo Way
Pima 1965 40,885 Urban Interstate I 10; WB over Ajo Way; FAU 8173
Coconino 1934 39,561 Urban other principal arterial SB 40 over Rio De Flag
Pima 1966 34,572 Urban Interstate I 10; EB over Country Club Road
Pima 1965 34,572 Urban Interstate I 10; EB over Palo Verde Road
Pima 1966 34,225 Urban minor arterial 22nd Street over SPRR; Aviation Hwy
Mohave 1964 27,997 Rural Interstate I 15 over Virgin River
Mohave 1967 20,518 Rural Interstate I 15 over Virgin River
Maricopa 1991 15,896 Urban freeway/expressway E 202 to N 143 Rmp over Sl 202 and SR 143
Navajo 1969 12,709 Rural Interstate I-40 WB over SB 40
Mohave 1972 10,400 Rural Interstate I 15; NB over Virgin River
Apache 1964 9,700 Rural Interstate IRR I 40; WB over Window Rock Rd
Mohave 1973 9,100 Rural Interstate I 15; SB over Virgin River
Pima 1953 8,633 Rural major collector Nogales Hwy over Santa Cruz River
Yuma 1978 8,350 Urban Interstate I 8 EB over Colo R Pentntry Av Sptco
Pinal 1929 8,250 Rural arterial US 60 over Waterfall Canyon
Pinal 1949 7,925 Rural arterial US 60 over Queen Creek
Gila 1949 7,925 Rural arterial US 60 over Pinto Creek
Mohave 1974 7,226 Rural Interstate I-40 WB over Griffith Wash
Yuma 1955 5,722 Rural Interstate I-8 EB over San Cristobal Wash
Gila 1920 5,500 Urban minor arterial Jesse Hayes Rd over Pinal Creek
Maricopa 1957 5,088 Rural Interstate I-8 EB over Gillespie Canal
Type of Bridge Number of Bridges Area of All Bridges
(sq. meters)
Daily Crossings on All Bridges Number of Structurally Deficient Bridges Area of Structurally Deficient Bridges
(sq. meters)
Daily Crossings on Structurally Deficient Bridges
Rural Interstate 1,234 592,543 19,686,685 9 13,416 108,460
Rural arterial 928 589,853 7,597,352 5 4,938 33,452
Rural minor arterial 709 270,172 2,959,598 13 8,534 91,814
Rural major collector 1,085 462,815 2,558,153 20 11,586 37,478
Rural minor collector 331 104,154 431,072 15 5,558 6,354
Rural local road 822 242,240 696,142 45 10,101 10,596
Urban Interstate 320 637,030 17,216,509 6 15,530 225,499
Urban freeway/expressway 409 1,042,424 25,182,818 1 1,972 15,896
Urban other principal arterial 748 799,655 16,442,727 2 2,490 88,261
Urban minor arterial 665 712,589 10,083,203 3 10,381 43,275
Urban collector 435 319,109 2,807,467 3 2,352 6,000
Urban local road 742 261,046 1,861,059 10 2,599 9,758
Total 8,428 6,033,628 107,522,785 132 89,457 676,843
Type of Work Number of Bridges Cost to Repair
(in millions)
Daily Crossings Area of Bridges
(sq. meters)
Bridge replacement 1,294 $2,619 21,950,362 756,973
Widening & rehabilitation 200 $185 4,127,695 79,258
Rehabilitation 91 $308 895,880 122,933
Deck rehabilitation/replacement 15 $24 146,920 12,349
Other structural work 116 $131 3,785,682 61,681
Total 1,716 $3,267 30,906,539 1,033,195

About the data:

Data is from the Federal Highway Administration (FHWA) National Bridge Inventory (NBI), downloaded on March 11, 2021. Note that specific conditions on bridges may have changed as a result of recent work or updated inspections. Cost estimates were downloaded by ARTBA on March 11, 2021.

Effective January 1, 2018, FHWA changed the definition of structurally deficient as part of the final rule on highway and bridge performance measures, published May 20, 2017 pursuant to the 2012 federal aid highway bill Moving Ahead for Progress in the 21st Century Act (MAP-21). Two measures that were previously used to classify bridges as structurally deficient are no longer used. This includes bridges where the overall structural evaluation was rated in poor or worse condition, or where the adequacy of waterway openings was insufficient.

The new definition limits the classification to bridges where one of the key structural elements—the deck, superstructure, substructure or culverts, are rated in poor or worse condition. During inspection, the conditions of a variety of bridge elements are rated on a scale of 0 (failed condition) to 9 (excellent condition). A rating of 4 is considered “poor” condition.

Cost estimates have been derived by ARTBA, based on 2019 average bridge replacement costs for structures on and off the National Highway System, published by FHWA. Bridge rehabilitation costs are estimated to be 68 percent of replacement costs. A bridge is considered to need repair if the structure has identified repairs as part of the NBI, a repair cost estimate is supplied by the bridge owner or the bridge is classified as structurally deficient. Please note that for a few states, the number of bridges needing to be repaired can vary significantly from year to year, and reflects the data entered by the state.

Bridges are classified by FHWA into types based on the functional classification of the roadway on the bridge. Interstates comprise routes officially designated by the Secretary of Transportation. Other principal arterials serve major centers of urban areas or provide mobility through rural areas. Freeways and expressways have directional lanes generally separated by a physical barrier, and access/egress points generally limited to on- and off-ramps. Minor arterials serve smaller areas and are used for trips of moderate length. Collectors funnel traffic from local roads to the arterial network; major collectors have higher speed limits and traffic volumes and are longer in length and spaced at greater intervals, while minor collectors are shorter and provide service to smaller communities. Local roads do not carry through traffic and are intended for short distance travel.

50
Compared to 50 in 2019

in the nation in % of structurally deficient bridges

1. West Virginia 21.2%
49. Utah 2.0%
50. Arizona 1.6%
51. Texas 1.5%

46
Compared to 46 in 2019

in the nation in # of structurally deficient bridges

1. Iowa 4,571
45. Alaska 141
46. Arizona 132
47. Hawaii 84

48
Compared to 48 in 2019

in the nation in % of structurally deficient bridge deck area

1. Rhode Island 21.0%
47. Georgia 2.0%
48. Arizona 2.0%
49. Texas 1.0%
Full State Ranking

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  • Source: Data is from the Federal Highway Administration (FHWA) National Bridge Inventory (NBI), downloaded on March 11, 2021. Note that specific conditions on bridges may have changed as a result of recent work or updated inspections.

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