National Bridge Inventory: Utah

  • Of the 3,061 bridges in the state, 66, or 2.2 percent, are classified as structurally deficient. This means one of the key elements is in poor or worse condition.
  • This is down from 92 bridges classified as structurally deficient in 2014.
  • 4 of the structurally deficient bridges are on the Interstate Highway System.
  • 244 bridges are posted for load, which may restrict the size and weight of vehicles crossing the structure.
  • The state has identified needed repairs on 127 bridges at an estimated cost of $51.0 million.
  • This compares to 159 bridges that needed work in 2014.

County Year Built Daily Crossings Type of Bridge Location
Utah 1964 123,670 Urban Interstate I-15 (SR-15) SBL over Union Pacific Railroad
Salt Lake 1979 37,101 Urban minor arterial 106 So over East Jordan Canal
Iron 1965 24,335 Urban Interstate I-15 (SR-15) SBL over Nichols Canyon Road
Iron 1965 24,335 Urban Interstate I-15 (SR-15) NBL over Nichols Canyon Road
Salt Lake 1950 22,982 Urban local road 64 South Street over Jordan and Salt Lake C
Salt Lake 1980 15,015 Urban collector 3 East Street over Mill Creek
Davis 1966 13,280 Urban minor arterial SR-109,Gentile St. over I-15 (SR-15) NBL & S
Washington 1998 12,600 Urban collector Foremaster Drive over Rim Rock Wash
Salt Lake 1967 11,490 Urban Interstate I-15Ramp to SR-270 over 2 W. & ; West Temple
Utah 1968 10,430 Urban other principal arterial SR-75 over Union Pacific Railroad
Salt Lake 1940 8,240 Urban minor arterial 56 South Street over Jordan Salt Lake Canal
Salt Lake 1980 5,166 Urban collector 35 South Street over Utah and Salt Lake Can
Salt Lake 1984 5,166 Urban collector 92 West Street over Utah and Salt Lake Canal
Summit 1924 3,938 Rural major collector County Road over Echo Creek
Weber 1938 1,890 Rural major collector County Road over Middle Fork Ogden River
Morgan 1961 1,298 Rural major collector County Road over Union Pacific RR
Salt Lake 1970 1,197 Urban local road Dutch Draw Drive over North Jordan Canal
Cache 1920 1,008 Urban collector 47 South Street over Little Bear River
Weber 1972 1,000 Rural major collector County Road over North Fork Ogden River
Salt Lake 1935 882 Urban minor arterial 134 South Street over Utah and Salt Lake Canal
San Juan 1953 875 Rural major collector SR-163 over San Juan River
Box Elder 1941 630 Rural major collector Town Str.-Fa. #526 over Deep Creek
Salt Lake 1995 378 Urban local road Willow Green Cir. over Little Cottonwood Creek
Salt Lake 1995 378 Urban local road Cobble Canyon Ln. over Little Cottonwood Creek
Box Elder 1935 360 Rural major collector SR-102 over West 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 418 285,692 7,733,253 0 0 0
Rural arterial 176 102,452 1,203,203 0 0 0
Rural minor arterial 146 50,469 277,279 0 0 0
Rural major collector 302 91,711 340,375 8 1,846 10,338
Rural minor collector 152 32,198 56,559 7 838 860
Rural local road 530 89,499 124,200 32 2,261 1,613
Urban Interstate 462 611,850 42,905,908 4 4,850 183,830
Urban freeway/expressway 54 60,135 1,489,699 0 0 0
Urban other principal arterial 257 313,088 5,923,081 1 585 10,430
Urban minor arterial 164 161,408 2,118,650 4 2,198 59,503
Urban collector 205 92,861 883,781 5 823 38,955
Urban local road 195 56,642 489,929 5 819 24,960
Total 3,061 1,948,005 63,545,917 66 14,222 330,489
Type of Work Number of Bridges Cost to Repair
(in millions)
Daily Crossings Area of Bridges
(sq. meters)
Bridge replacement 26 $37 639,940 15,447
Widening & rehabilitation 1 $0 3,000 263
Rehabilitation 82 $12 343,262 18,180
Deck rehabilitation/replacement 1 $0 10 34
Other structural work 17 $2 124,211 2,715
Total 127 $51 1,110,423 36,639

About the data:

Data from the Federal Highway Administration (FHWA) National Bridge Inventory (NBI), released March 15, 2019. 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 2017 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 cost estimate is supplied by the bridge owner or the bridge is classified as structurally deficient.

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.

from 48 in 2017

in the nation in % of structurally deficient bridges

1. Rhode Island 23.1%
48. Vermont 2.4%
49. Utah 2.2%
50. Arizona 1.8%

from 47 in 2017

in the nation in # of structurally deficient bridges

1. Iowa 4,675
48. Vermont 66
49. Utah 66
50. Delaware 34
Full State Ranking

  • Source: Bridge data is from the 2018 National Bridge Inventory ASCII files, released by the Federal Highway Administration on March 14, 2019. Note that specific conditions on bridges may have changed as a result of recent work. ARTBA is a non-partisan federation whose primary goal is to aggressively grow and protect transportation infrastructure investment to meet the public and business demand for safe and efficient travel.
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