National Bridge Inventory: Indiana

  • Of the 19,280 bridges in the state, 1,203, or 6.2 percent, are classified as structurally deficient. This means one of the key elements is in poor or worse condition.
  • This is down from 1,796 bridges classified as structurally deficient in 2014.
  • 30 of the structurally deficient bridges are on the Interstate Highway System.
  • 1,653 bridges are posted for load, which may restrict the size and weight of vehicles crossing the structure.
  • The state has identified needed repairs on 3,386 bridges at an estimated cost of $1.6 billion.
  • This compares to 4,720 bridges that needed work in 2014.

County Year Built Daily Crossings Type of Bridge Location
Marion 1974 186,289 Urban Interstate I-65, CD over New York Street
Marion 1974 186,289 Urban Interstate I-65, CD over CSX RR, Ohio St
Marion 1973 137,908 Urban Interstate I-70 over Meridian Street
Lake 1980 68,050 Urban freeway/expressway SR 912 over Guthrie 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
Hamilton 1966 55,765 Rural Interstate I-69 over Thorpe Creek overflow
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
Marion 1957 38,567 Urban other principal arterial Kessler Blvd W. Dr over White River
Allen 1964 36,210 Rural Interstate I-69 over Graham McCullough Dit #4
Marion 1907 32,203 Urban minor arterial 30th Street over White River
Lake 1935 31,898 Urban freeway/expressway US 41 over Gtw RR
Wayne 2000 31,828 Urban other principal arterial US 40 over South 1st Street
Hamilton 1935 28,210 Rural major collector Allisonville Rd over Shoemaker Ditch
Marion 1960 27,310 Urban minor arterial Dandy Trail over Eagle Creek
Floyd 1974 26,573 Rural Interstate I-64 EB over SR 62/64 EB/WB
Clark 1960 24,226 Urban local road McCullough Pike over Browns Station Way
Allen 1986 23,300 Urban minor arterial Bluffton Rd over St Marys River
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 21,929 Urban freeway/expressway US 41 SB over Pigeon Creek
Cass 1930 21,469 Urban other principal arterial Market St over Eel River
St. Joseph 1986 21,347 Urban freeway/expressway SR 331 over St Joseph River
Porter 1956 21,049 Urban minor arterial Cr 6W/Willowcrk over I-90 EB/WB
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 928 843,307 13,488,944 16 10,548 259,207
Rural arterial 915 650,241 7,633,368 26 25,159 203,475
Rural minor arterial 762 448,412 4,267,764 32 15,837 149,389
Rural major collector 2,743 1,017,094 5,900,319 147 48,266 308,654
Rural minor collector 2,384 543,999 1,310,536 173 25,292 74,998
Rural local road 7,569 1,163,161 1,981,031 581 67,658 109,027
Urban Interstate 741 1,189,477 33,936,068 14 25,253 723,573
Urban freeway/expressway 470 628,075 8,051,975 13 15,183 245,112
Urban other principal arterial 498 627,356 9,565,666 16 20,377 275,984
Urban minor arterial 750 576,327 7,894,048 52 34,307 526,070
Urban collector 637 286,807 3,708,621 42 20,078 202,022
Urban local road 883 223,390 1,368,913 91 17,719 131,063
Total 19,280 8,197,646 99,107,253 1,203 325,675 3,208,574
Type of Work Number of Bridges Cost to Repair
(in millions)
Daily Crossings Area of Bridges
(sq. meters)
Bridge replacement 1,309 $521 1,450,349 173,143
Widening & rehabilitation 47 $44 403,088 27,051
Rehabilitation 1,523 $810 8,214,446 817,288
Deck rehabilitation/replacement 142 $117 824,595 108,163
Other structural work 365 $117 2,404,867 168,085
Total 3,386 $1,608 13,297,345 1,293,729

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 29 in 2017

in the nation in % of structurally deficient bridges

1. Rhode Island 23.1%
30. Hawaii 6.9%
31. Indiana 6.2%
32. New Mexico 5.8%

from 14 in 2017

in the nation in # of structurally deficient bridges

1. Iowa 4,675
14. Kansas 1,288
15. Indiana 1,203
16. Michigan 1,196
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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