National Bridge Inventory: Utah

  • Of the 3,056 bridges in the state, 63, 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 81 bridges classified as structurally deficient in 2017.
  • The deck area of structurally deficient bridges accounts for 0.9 percent of total deck area on all structures.
  • 6 of the structurally deficient bridges are on the Interstate Highway System. A total of 88.9 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.
  • 210 bridges are posted for load, which may restrict the size and weight of vehicles crossing the structure.
  • The state has identified needed repairs on 128 bridges at an estimated cost of $87.2 million.
  • This compares to 140 bridges that needed work in 2017.

County Year Built Daily Crossings Type of Bridge Location
Davis 1966 130,000 Urban Interstate I-15 (SR-15) SBL over SR-193,7 So.Clearfield
Weber 1966 115,000 Urban Interstate I-15 (SR-15) NBL over SR-97, 56 So. Roy
Iron 1965 29,000 Urban Interstate I-15 (SR-15) NBL over Nichols Canyon Road
Iron 1965 29,000 Urban Interstate I-15 (SR-15) SBL over Nichols Canyon Road
Salt Lake 1979 26,000 Urban minor arterial 106 So over East Jordan Canal
Salt Lake 1936 20,000 Urban minor arterial Highland Drive over Big Cottonwood Creek
Salt Lake 1980 16,000 Urban collector 3 East Street over Mill Creek
Salt Lake 1965 16,000 Urban minor arterial 650 North Street over Jordan River
Davis 1966 16,000 Urban minor arterial SR-109,Gentile St. over I-15 (SR-15) NBL & S
Summit 1968 14,685 Rural Interstate Int.X-Rd.To I-80EB over I-80(SR-80) EBL & WB
Washington 1998 13,000 Urban collector Foremaster Drive over Rim Rock Wash
Utah 1968 12,000 Urban other principal arterial SR-75 over Union Pacific Railroad
Salt Lake 1935 9,800 Urban minor arterial 134 South Street over Utah & Salt Lake Canal
Salt Lake 1940 7,100 Urban minor arterial 56 South Street over Jordan Salt Lake Canal
Salt Lake 1964 5,800 Urban collector 17 East Street over I-80 (SR-80) EBL & W
Millard 1966 5,800 Rural Interstate I-70 (SR-70) EBL over I-15 (SR-15) NBL and SBl
Salt Lake 1960 2,293 Urban local road 5 South Street over Jordan River
Salt Lake 1972 2,200 Urban collector 3 West Street over I-215 (SR-215) EBL &
Morgan 1961 2,100 Rural major collector County Road over Union Pacific RR
Weber 1972 2,000 Rural major collector County Road over North Fork Ogden River
Summit 1955 1,700 Rural minor arterial SR-32 over Weber River
Summit 1971 1,600 Rural major collector SR-65,Int. X-Road over I-84 (SR-84) EB and WB
Utah 1975 1,260 Urban local road 4 East Street over American Fork Creek
Millard 1966 1,200 Rural major collector SR-161,Int.X-Rd over I-15 (SR-15) NBL & ; S
Salt Lake 1970 1,197 Urban local road Dutch Draw Drive over North Jordan 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 414 272,537 7,905,383 2 1,428 20,485
Rural arterial 176 102,694 1,348,915 0 0 0
Rural minor arterial 145 51,530 323,902 1 273 1,700
Rural major collector 299 89,940 369,053 8 2,473 8,540
Rural minor collector 149 32,176 149,609 5 591 1,210
Rural local road 525 89,829 169,509 27 2,579 2,613
Urban Interstate 468 633,597 49,021,736 4 3,128 303,000
Urban freeway/expressway 61 72,752 2,004,004 0 0 0
Urban other principal arterial 257 313,848 6,755,696 1 586 12,000
Urban minor arterial 165 164,938 1,953,533 6 3,197 94,900
Urban collector 202 92,522 941,094 4 2,330 37,000
Urban local road 195 56,758 467,928 5 1,307 5,506
Total 3,056 1,973,121 71,410,362 63 17,891 486,954
Type of Work Number of Bridges Cost to Repair
(in millions)
Daily Crossings Area of Bridges
(sq. meters)
Bridge replacement 27 $45 636,311 15,498
Widening & rehabilitation 1 $0 3,000 263
Rehabilitation 81 $39 516,083 23,631
Deck rehabilitation/replacement 1 $0 150 33
Other structural work 18 $3 1,224 2,177
Total 128 $87 1,156,768 41,602

About the data:

Data is from the Federal Highway Administration (FHWA) National Bridge Inventory (NBI), downloaded on January 3, 2022. 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 January 3, 2022.

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 2020 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 49 in 2020

in the nation in % of structurally deficient bridges

1. West Virginia 20.4%
47. Georgia 2.1%
48. Utah 2.1%
49. Delaware 1.9%

Compared to 48 in 2020

in the nation in # of structurally deficient bridges

1. Iowa 4,504
48. Vermont 68
49. Utah 63
50. Nevada 29

Compared to 52 in 2020

in the nation in % of structurally deficient bridge deck area

1. Rhode Island 19.5%
51. Georgia 1.1%
52. Utah 0.9%
Full State Ranking


  • Source: Data is from the Federal Highway Administration (FHWA) National Bridge Inventory (NBI), downloaded on January 3, 2022. Note that specific conditions on bridges may have changed as a result of recent work or updated inspections.

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