National Bridge Inventory: Utah

  • Of the 3,062 bridges in the state, 62, or 2.0 percent, are classified as structurally deficient. This means one of the key elements is in poor or worse condition.
  • This is down from 88 bridges classified as structurally deficient in 2016.
  • 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 88.7 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.
  • 221 bridges are posted for load, which may restrict the size and weight of vehicles crossing the structure.
  • The state has identified needed repairs on 125 bridges at an estimated cost of $72.2 million.
  • This compares to 151 bridges that needed work in 2016.

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
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
Millard 1966 5,800 Rural Interstate I-70 (SR-70) EBL over I-15 (SR-15) NBL and SBl
Salt Lake 1964 5,800 Urban collector 17 East Street over I-80 (SR-80) EBL & W
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
San Juan 1953 2,000 Rural major collector SR-163 over San Juan River
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
Box Elder 1945 1,100 Rural local road County Road over West Canal
Summit 1996 850 Rural major collector County Road over Smith and Morehouse Cr
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 415 274,930 7,932,978 2 1,428 20,485
Rural arterial 176 102,694 1,348,915 0 0 0
Rural minor arterial 145 51,530 323,902 0 0 0
Rural major collector 301 93,297 402,491 9 2,331 9,310
Rural minor collector 150 32,216 151,785 3 443 990
Rural local road 533 90,312 170,228 29 2,617 2,739
Urban Interstate 464 624,082 48,520,131 4 3,128 303,000
Urban freeway/expressway 61 72,752 2,004,004 0 0 0
Urban other principal arterial 255 310,795 6,710,196 1 586 12,000
Urban minor arterial 165 164,938 1,953,533 5 2,503 78,900
Urban collector 203 92,710 941,514 4 2,330 37,000
Urban local road 194 56,346 465,328 5 1,307 5,506
Total 3,062 1,966,602 70,925,005 62 16,672 469,930
Type of Work Number of Bridges Cost to Repair
(in millions)
Daily Crossings Area of Bridges
(sq. meters)
Bridge replacement 27 $34 636,311 15,498
Widening & rehabilitation 1 $0 3,000 263
Rehabilitation 78 $33 498,809 22,254
Deck rehabilitation/replacement 1 $0 150 33
Other structural work 18 $5 186,024 3,230
Total 125 $72 1,324,294 41,279

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.

Compared to 49 in 2019

in the nation in % of structurally deficient bridges

1. West Virginia 21.2%
48. Delaware 2.2%
49. Utah 2.0%
50. Arizona 1.6%

Compared to 48 in 2019

in the nation in # of structurally deficient bridges

1. Iowa 4,571
48. Vermont 66
49. Utah 62
50. Nevada 28

Compared to 52 in 2019

in the nation in % of structurally deficient bridge deck area

1. Rhode Island 21.0%
51. Nevada 1.0%
52. Utah 1.0%
Full State Ranking


  • 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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