National Bridge Inventory: Indiana



  • Of the 19,327 bridges in the state, 1,111, or 5.7 percent, are classified as structurally deficient. This means one of the key elements is in poor or worse condition.
  • This is down from 1,464 bridges classified as structurally deficient in 2016.
  • The deck area of structurally deficient bridges accounts for 3.7 percent of total deck area on all structures.
  • 28 of the structurally deficient bridges are on the Interstate Highway System. A total of 95.1 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.
  • 1,955 bridges are posted for load, which may restrict the size and weight of vehicles crossing the structure.
  • The state has identified needed repairs on 3,198 bridges at an estimated cost of $2.3 billion.
  • This compares to 3,964 bridges that needed work in 2016.

County Year Built Daily Crossings Type of Bridge Location
Marion 1974 186,289 Urban Interstate I-65, CD over CSX RR Ohio St
Marion 1974 186,289 Urban Interstate I-65, CD over New York Street
Marion 1974 186,289 Urban Interstate I-65, CD over Vermont Street
Marion 1973 137,908 Urban Interstate I-70 over Meridian Street
Marion 1974 104,550 Urban Interstate I-65 Ramp 5W S over Washington St/Old US 40
Marion 1974 82,883 Urban Interstate I-65 NB, I-70 EB over East Tenth Street
Marion 1967 60,746 Urban Interstate I-465 EB over West 96th Street
Marion 1967 60,746 Urban Interstate I-465 WB over West 96th Street
Marion 1963 46,327 Urban Interstate I-65 NB over Keystone Avenue
Vanderburgh 1956 44,520 Urban freeway/expressway SR 62 over Evansville Western RR
Marion 1958 40,916 Urban other principal arterial 16th Street over Little Eagle Creek
Clark 1960 36,780 Urban local road McCullough Pike over Browns Station Way
Marion 1965 35,374 Urban other principal arterial Emerson Avenue SB over Pogue S Run
Marion 1965 35,374 Urban other principal arterial Emerson Avenue NB over Pogue S Run
Marion 1907 32,203 Urban minor arterial 30th Street over White River
Floyd 1974 26,573 Urban Interstate I-64 EB over SR 62/64 EB/WB
Allen 1986 23,300 Urban minor arterial Bluffton Rd over St Marys River
Lake 1936 22,677 Urban other principal arterial Ridge Road over Kennedy Avenue, Trail
Tippecanoe 1968 22,078 Urban Interstate I-65 SB over Wabash River
Jackson 1960 22,064 Rural Interstate I-65 SB over Conrail RR
Vanderburgh 1940 21,651 Urban freeway/expressway US 41 SB over Pigeon Creek
Marion 1958 21,497 Urban minor arterial Lynhurst Dr over Big Eagle Creek
Marion 1959 20,805 Urban minor arterial Dandy Trail over I-74 EB/WB
Elkhart 1988 20,636 Urban other principal arterial SR 19 over Christiana Creek
Allen 1927 20,025 Urban minor arterial State Blvd over Spy Run Creek
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 904 821,671 13,316,620 11 22,834 170,457
Rural arterial 898 645,247 7,188,796 15 5,231 120,167
Rural minor arterial 739 424,534 4,020,160 21 12,110 117,286
Rural major collector 2,733 1,010,566 5,870,507 126 44,736 233,611
Rural minor collector 2,375 537,831 1,282,335 171 25,853 69,319
Rural local road 7,571 1,164,076 2,010,023 554 66,769 99,905
Urban Interstate 782 1,231,773 34,539,204 17 30,612 1,123,058
Urban freeway/expressway 449 617,405 7,823,299 10 11,077 148,446
Urban other principal arterial 539 679,681 10,250,557 14 28,963 255,503
Urban minor arterial 768 586,836 7,961,930 45 23,142 425,325
Urban collector 679 314,943 4,009,732 44 19,509 182,408
Urban local road 890 227,325 1,398,964 83 16,505 151,341
Total 19,327 8,261,888 99,672,127 1,111 307,342 3,096,826
Type of Work Number of Bridges Cost to Repair
(in millions)
Daily Crossings Area of Bridges
(sq. meters)
Bridge replacement 1,257 $368 1,203,798 158,831
Widening & rehabilitation 40 $41 278,762 21,688
Rehabilitation 1,455 $1,487 8,319,610 829,350
Deck rehabilitation/replacement 140 $160 546,141 89,353
Other structural work 306 $207 1,532,029 125,458
Total 3,198 $2,264 11,880,340 1,224,680

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.

30
Compared to 31 in 2019

in the nation in % of structurally deficient bridges

1. West Virginia 21.2%
29. California 6.0%
30. Indiana 5.7%
31. Connecticut 5.7%

16
Compared to 15 in 2019

in the nation in # of structurally deficient bridges

1. Iowa 4,571
15. Michigan 1,219
16. Indiana 1,111
17. South Dakota 1,038

38
Compared to 37 in 2019

in the nation in % of structurally deficient bridge deck area

1. Rhode Island 21.0%
37. Wisconsin 4.0%
38. Indiana 4.0%
39. Oregon 4.0%
Full State Ranking

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  • 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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