National Bridge Inventory: Wyoming



  • The state has identified needed repairs on 1,186 bridges.
  • This compares to 1,216 bridges that needed work in 2021.
  • Over the life of the IIJA, Wyoming will receive a total of $225.0 million in bridge formula funds, which will help make needed repairs.
  • Wyoming currently has access to $180.0 million of that total, and has committed $43.2 million towards 53 projects as of June 2025.
  • Of the 3,138 bridges in the state, 224, or 7.1 percent, are classified as structurally deficient. This means one of the key elements is in poor or worse condition.
  • This is down from 230 bridges classified as structurally deficient in 2021.
  • The deck area of structurally deficient bridges accounts for 8.3 percent of total deck area on all structures.

Top Most Traveled Structurally Deficient Bridges in Wyoming

County Year Built Daily Crossings Type of Bridge Location
Teton 1938 15,780 Urban other principal arterial US 89 over Flat Creek
Laramie 1976 13,625 Urban other principal arterial Wyo 212 over Crow Creek
Laramie 1977 13,143 Urban other principal arterial Wyo 212 over I-80
Laramie 1963 11,096 Urban Interstate I-25 NBL over I-80
Laramie 1963 11,014 Urban Interstate I-25 SBL over UPRR / US 30
Laramie 1965 10,938 Urban Interstate I-80 EBL over Cr 123-1 (Southwest Dr)
Laramie 1966 10,938 Urban Interstate I-80 EBL over South Greeley Highway
Laramie 1963 10,761 Urban Interstate I-25 NBL over UPRR / US 30
Laramie 1966 10,689 Urban Interstate I-80 WBL over South Greeley Highway
Teton 1949 10,222 Rural minor arterial Wyo 22 over Fish Creek
Laramie 1964 10,141 Rural Interstate I-25 SBL over Wyo 223 (Terry Ranch Rd)
Sweetwater 1994 9,974 Urban other principal arterial Wyo 530 NBL over UPRR / I-80 Bus
Sweetwater 1978 9,974 Urban other principal arterial Wyo 530 SBL over UPRR / I-80 Bus
Sweetwater 1982 9,814 Urban other principal arterial Wyo 530 SBL over Green River
Laramie 1982 9,739 Urban Interstate I-180 NBL over Uprr
Laramie 1992 9,573 Urban minor arterial Converse Avenue over Dry Creek
Sheridan 1968 9,363 Urban minor arterial 5th Street over Big Goose Creek
Uinta 1967 8,996 Urban Interstate I-80 WBL over Yellow Creek Road
Sweetwater 1966 7,912 Urban Interstate I-80 EBL over SW Cr 53 (White Mtn Rd)
Sweetwater 1967 7,357 Rural Interstate I-80 EBL over Wyo 374
Laramie 1959 7,331 Rural Interstate I-80 WBL over Warren Road
Laramie 1958 7,107 Rural Interstate I-80 WBL over Uprr
Laramie 1958 7,004 Rural Interstate I-80 EBL over Uprr
Sweetwater 1964 6,916 Rural Interstate I-80 EBL over Wyo 377
Uinta 1968 6,672 Rural Interstate I-80 WBL over Blacks Fork River

Bridge Inventory: Wyoming

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 801 376,778 3,448,475 31 18,351 151,351
Rural arterial 367 218,128 1,037,626 8 3,924 20,872
Rural minor arterial 208 94,350 389,082 9 5,428 24,718
Rural major collector 384 153,491 329,156 17 7,187 14,854
Rural minor collector 389 108,660 182,678 49 11,767 13,225
Rural local road 671 119,093 94,236 80 16,836 15,025
Urban Interstate 116 111,033 1,027,862 11 18,635 101,355
Urban freeway/expressway 0 0 0 0 0 0
Urban other principal arterial 63 70,359 807,686 6 13,792 72,310
Urban minor arterial 59 58,550 350,180 6 13,459 32,304
Urban collector 50 27,019 135,836 3 1,243 7,066
Urban local road 30 6,353 26,022 4 834 4,050
Total 3,138 1,343,814 7,828,839 224 111,458 457,130

Proposed Bridge Work

Type of Work Number of Bridges Cost to Repair
(in millions)
Daily Crossings Area of Bridges
(sq. meters)
Bridge replacement 128 $128 122,734 40,950
Widening & rehabilitation 14 $13 18,575 5,916
Rehabilitation 132 $199 470,025 94,980
Deck rehabilitation/replacement 29 $29 106,273 14,031
Other structural work 883 $588 1,235,671 277,787
Total 1,186 $956 1,953,278 433,664

About the data:

Data and cost estimates are from the Federal Highway Administration (FHWA) National Bridge Inventory (NBI), downloaded on June 24, 2025. 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 2023 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.

22
Compared to 24 in 2024

in the nation in % of structurally deficient bridges

1. Iowa 19.0%
21. North Carolina 7.0%
22. Wyoming 7.0%
23. Wisconsin 7.0%

40
Compared to 41 in 2024

in the nation in # of structurally deficient bridges

1. Iowa 4,424
39. Maryland 240
40. Wyoming 224
41. Connecticut 209

10
Compared to 10 in 2024

in the nation in % of structurally deficient bridge deck area

1. West Virginia 13.0%
9. Washington 8.0%
10. Wyoming 8.0%
11. Missouri 8.0%
Full State Ranking

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  • Source: Data is from the Federal Highway Administration (FHWA) National Bridge Inventory (NBI), downloaded on June 24, 2025. Note that specific conditions on bridges may have changed as a result of recent work or updated inspections.

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