National Bridge Inventory: Utah

  • Of the 3,080 bridges in the state, 64, or 2.1 percent, are classified as structurally deficient. This means one of the key elements is in poor or worse condition.
  • This is down from 66 bridges classified as structurally deficient in 2018.
  • The deck area of structurally deficient bridges accounts for 0.8 percent of total deck area on all structures.
  • 2 of the structurally deficient bridges are on the Interstate Highway System. A total of 96.9 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.
  • 213 bridges are posted for load, which may restrict the size and weight of vehicles crossing the structure.
  • The state has identified needed repairs on 130 bridges at an estimated cost of $86.9 million.
  • This compares to 127 bridges that needed work in 2018.

County Year Built Daily Crossings Type of Bridge Location
Iron 1965 30,431 Urban Interstate I-15 (SR-15) SBL over Nichols Canyon Road
Salt Lake 1979 23,677 Urban minor arterial 106 So over East Jordan Canal
Weber 1967 18,512 Urban Interstate I-84 (SR-84) WBL over 44 South Street
Salt Lake 1936 18,276 Urban minor arterial Highland Drive over Big Cottonwood Creek
Salt Lake 1965 14,993 Urban minor arterial 650 North Street over Jordan River
Salt Lake 1980 14,979 Urban collector 3 East Street over Mill Creek
Washington 1998 13,851 Urban collector Foremaster Drive over Rim Rock Wash
Salt Lake 1935 8,988 Urban minor arterial 134 South Street over Utah & Salt Lake Canal
Weber 1966 8,922 Urban collector 44 South Street over I-15 (SR-15) NBL and SBl
Tooele 1970 7,905 Rural local road Knoll S Int.X-Rd. over I-80 (SR-80) EBl
Salt Lake 1940 6,523 Urban minor arterial 56 South Street over Jordan Salt Lake Canal
Salt Lake 1964 5,280 Urban collector 17 East Street over I-80 (SR-80) EBL & W
Davis 1974 3,715 Urban collector 5 E.St.-So.Weber over I-84 (SR-84) EBL & W
Salt Lake 1960 2,293 Urban local road 5 South Street over Jordan River
Morgan 1961 2,239 Rural major collector County Road over Union Pacific RR
Weber 1972 2,067 Rural major collector County Road over North Fork Ogden River
Salt Lake 1972 1,994 Urban collector 3 West Street over I-215 (SR-215) EBL &
Summit 1955 1,805 Rural minor arterial SR-32 over Weber River
Utah 1975 1,260 Urban local road 4 East Street over American Fork Creek
Millard 1966 1,241 Rural major collector SR-161,Int.X-Rd over I-15 (SR-15) NBL & ; S
Salt Lake 1990 1,200 Urban local road Sierra Dr.(2930 W) over Utah and Salt Lake Canal
Salt Lake 1970 1,197 Urban local road Dutch Draw Drive over North Jordan Canal
Box Elder 1945 1,100 Rural local road County Road over West Canal
Summit 1996 1,089 Rural major collector County Road over Smith and Morehouse Cr
Box Elder 1941 630 Rural major collector Town Str.-Fa. #526 over Deep Creek
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 411 270,704 5,740,875 0 0 0
Rural arterial 180 110,805 1,482,768 0 0 0
Rural minor arterial 145 51,624 336,036 2 623 2,336
Rural major collector 299 89,568 391,022 8 1,824 8,121
Rural minor collector 148 32,506 149,540 6 740 1,138
Rural local road 530 90,741 221,932 28 2,659 10,513
Urban Interstate 468 632,655 39,746,357 2 832 48,943
Urban freeway/expressway 61 72,752 1,748,218 0 0 0
Urban other principal arterial 271 322,405 6,068,773 0 0 0
Urban minor arterial 166 166,912 1,896,987 5 1,437 72,457
Urban collector 205 93,253 915,443 7 5,893 49,241
Urban local road 196 58,104 463,347 6 1,452 6,706
Total 3,080 1,992,028 59,161,298 64 15,461 199,455
Type of Work Number of Bridges Cost to Repair
(in millions)
Daily Crossings Area of Bridges
(sq. meters)
Bridge replacement 27 $50 619,955 15,498
Widening & rehabilitation 1 $0 3,000 263
Rehabilitation 83 $33 238,407 21,986
Deck rehabilitation/replacement 1 $0 150 33
Other structural work 18 $3 1,224 2,177
Total 130 $87 862,736 39,957

About the data:

Data and cost estimates are from the Federal Highway Administration (FHWA) National Bridge Inventory (NBI), downloaded on February 1, 2023. Note that specific conditions on bridges may have changed as a result of recent work or updated inspections.

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 2021 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.

Compared to 48 in 2021

in the nation in % of structurally deficient bridges

1. West Virginia 20.0%
45. Vermont 3.0%
46. Utah 2.0%
47. Georgia 2.0%

Compared to 49 in 2021

in the nation in # of structurally deficient bridges

1. Iowa 4,604
48. Vermont 71
49. Utah 64
50. Nevada 29

Compared to 52 in 2021

in the nation in % of structurally deficient bridge deck area

1. Rhode Island 17.0%
51. Georgia 1.0%
52. Utah 1.0%
Full State Ranking


  • Source: Data is from the Federal Highway Administration (FHWA) National Bridge Inventory (NBI), downloaded on February 1, 2023. Note that specific conditions on bridges may have changed as a result of recent work or updated inspections.

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