National Bridge Inventory: Indiana



  • The state has identified needed repairs on 2,736 bridges.
  • This compares to 3,041 bridges that needed work in 2021.
  • Over the life of the IIJA, Indiana will receive a total of $372.7 million in bridge formula funds, which will help make needed repairs.
  • Indiana currently has access to $298.2 million of that total, and has committed $273.2 million towards 369 projects as of June 2025.
  • Of the 19,542 bridges in the state, 1,043, or 5.3 percent, are classified as structurally deficient. This means one of the key elements is in poor or worse condition.
  • This is down from 1,082 bridges classified as structurally deficient in 2021.
  • The deck area of structurally deficient bridges accounts for 3.8 percent of total deck area on all structures.

Top Most Traveled Structurally Deficient Bridges in Indiana

County Year Built Daily Crossings Type of Bridge Location
Marion 1966 129,314 Urban Interstate I-465 over Crooked Creek
Marion 1966 129,314 Urban Interstate I-465 over Delaware Creek
Vanderburgh 1956 44,520 Urban freeway/expressway SR 62 over Evansville Western RR
Porter 1969 40,435 Urban Interstate I-94 WB over US 20 EB/WB
Dearborn 1976 40,222 Rural Interstate I-275 over Ohio River, CSX RR, Cr
Marion 1970 38,589 Urban other principal arterial 10th Street over Big Eagle Creek
St. Joseph 1991 38,231 Urban freeway/expressway US 20 over Clover Road
Marion 1907 35,555 Urban minor arterial 30th Street over White River
Marion 1988 28,240 Urban other principal arterial 10th Street over Little Eagle Creek
Marion 1935 25,206 Urban other principal arterial 16th Strmlk Jr over Indpls Water Co Canal
Marion 1965 25,044 Urban local road 42nd Street over Mitthoefer Ditch
Lake 1934 24,762 Urban other principal arterial Ridge Road over Elgin Joliet Eastern RR.
Lake 1955 24,318 Urban minor arterial Kennedy Avenue over Little Calumet River
LaPorte 1958 23,875 Urban other principal arterial E Michigan Blvd over Trail Creek
Allen 1986 23,300 Urban minor arterial Bluffton Rd over St Marys River
Madison 1962 23,226 Rural Interstate I-69 SB over Abandoned RR
Lake 1941 22,439 Urban freeway/expressway US 6 over Deep River
Lake 1941 22,439 Urban freeway/expressway US 6 over Muck Pocket
Lake 1964 22,124 Rural Interstate I-65 SB over Brown Ditch
Marion 1941 22,060 Urban other principal arterial 82nd Street EB over White River
Allen 1948 20,000 Urban minor arterial Clinton St over Beckett Run
Wayne 1965 19,818 Rural Interstate I-70 WB over Whitewater River
Marion 1973 19,770 Urban other principal arterial Raymond Street over Bean Creek, Conrail RR
Madison 1962 19,634 Rural Interstate I-69 NB over Abandoned RR
Elkhart 1965 18,719 Urban other principal arterial Cr 6 over Christiana Creek

Bridge Inventory: Indiana

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 894 827,152 14,951,435 13 47,943 230,589
Rural arterial 925 658,842 8,187,220 6 3,498 58,136
Rural minor arterial 764 434,491 3,787,858 10 7,761 56,633
Rural major collector 2,737 1,018,178 5,697,477 106 38,711 135,020
Rural minor collector 2,372 543,444 1,406,873 152 23,786 75,375
Rural local road 7,539 1,161,704 2,121,128 544 71,437 111,128
Urban Interstate 814 1,247,891 34,104,446 7 7,748 369,756
Urban freeway/expressway 459 679,655 8,013,153 5 8,318 131,885
Urban other principal arterial 543 683,979 9,425,962 21 57,032 335,819
Urban minor arterial 796 611,485 8,164,756 45 23,587 407,229
Urban collector 723 342,189 4,495,441 46 16,530 208,022
Urban local road 976 246,056 1,592,815 88 15,147 120,367
Total 19,542 8,455,066 101,948,564 1,043 321,499 2,239,959

Proposed Bridge Work

Type of Work Number of Bridges Cost to Repair
(in millions)
Daily Crossings Area of Bridges
(sq. meters)
Bridge replacement 1,227 $390 1,162,918 153,044
Widening & rehabilitation 13 $8 76,838 4,453
Rehabilitation 986 $861 3,748,755 493,634
Deck rehabilitation/replacement 79 $77 177,399 44,183
Other structural work 431 $291 1,042,511 167,686
Total 2,736 $1,628 6,208,421 862,999

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.

31
Compared to 32 in 2024

in the nation in % of structurally deficient bridges

1. Iowa 19.0%
30. Arkansas 5.0%
31. Indiana 5.0%
32. Kansas 5.0%

16
Compared to 16 in 2024

in the nation in # of structurally deficient bridges

1. Iowa 4,424
15. Kentucky 1,088
16. Indiana 1,043
17. Wisconsin 976

32
Compared to 41 in 2024

in the nation in % of structurally deficient bridge deck area

1. West Virginia 13.0%
31. Wisconsin 4.0%
32. Indiana 4.0%
33. Ohio 4.0%
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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