National Bridge Inventory: Kentucky

  • Of the 14,368 bridges in the state, 1,016, 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 1,066 bridges classified as structurally deficient in 2014.
  • 27 of the structurally deficient bridges are on the Interstate Highway System.
  • 3,231 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 $1.9 billion.
  • This compares to 3,473 bridges that needed work in 2014.

County Year Built Daily Crossings Type of Bridge Location
Jefferson 1957 123,194 Urban Interstate I-65 over Brandeis Ave
Jefferson 1957 123,194 Urban Interstate I-65 over CSX RR, Burnett, Hill St
Jefferson 1965 90,900 Urban Interstate I-64 over CSX,1St,Flyd,Prestn,Rvr
Jefferson 1963 84,001 Urban Interstate I-65 over Brook St, Muhammad Ali
Jefferson 1960 75,342 Urban collector Champions Trace Ln over S Fk Beargrass Creek
Jefferson 1972 75,109 Urban Interstate I-64 over 3rd,5th,Rvr Rd,Belvedere
Jefferson 1984 70,626 Urban Interstate I-265 over Avoca-Quarry Rd
Jefferson 1970 67,529 Urban Interstate I-264 over P and L Railway Wye
Jefferson 1970 65,739 Urban Interstate I-64 EB On Ramp over Mid Fk Beargrass Creek
Jefferson 1976 61,823 Urban Interstate I-64 over Old P and L RR (7-13 St)
Jefferson 1963 45,957 Urban Interstate I-64 EB over Tucker Station Rd
Jefferson 1967 40,034 Urban other principal arterial Brownsboro Rd over I-264
Jefferson 1968 37,300 Urban Interstate I-64 WB over Grinstead Dr
Jefferson 1967 37,239 Urban Interstate I-71 SB over US 42
Jefferson 1968 35,700 Urban Interstate I-64 EB over Grinstead Dr
Jefferson 1966 32,870 Urban Interstate I-64 EB over Mid Fk Beargrass Creek
Jefferson 1966 32,870 Urban Interstate I-64 WB over Mid Fk Beargrass Creek
Jefferson 1965 30,387 Urban minor arterial Ky 864 over Br of Greasy Ditch
Jefferson 1956 29,000 Urban other principal arterial US 31E over Norfolk Southern RR
Laurel 1969 24,871 Rural Interstate I-75 over Laurel River
Franklin 1963 23,459 Rural Interstate I-64 WB over Kentucky River
Franklin 1963 23,459 Rural Interstate I-64 EB over Kentucky River
Fayette 1963 21,873 Urban minor arterial US-25 over I-75
Franklin 1960 21,361 Rural Interstate I-64 WB over Ky 151
Franklin 1960 21,361 Rural Interstate I-64 EB over Benson 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 385 484,497 8,180,218 11 12,484 236,045
Rural arterial 829 993,770 5,183,885 7 16,002 64,190
Rural minor arterial 675 474,926 2,777,298 30 25,509 118,026
Rural major collector 1,911 736,009 3,894,856 114 26,589 201,294
Rural minor collector 2,435 575,991 1,641,327 203 37,529 145,755
Rural local road 5,852 814,609 1,237,785 523 55,845 121,214
Urban Interstate 462 930,252 28,954,895 16 82,362 1,004,006
Urban freeway/expressway 141 150,634 3,041,588 0 0 0
Urban other principal arterial 283 455,645 4,139,983 7 6,976 136,819
Urban minor arterial 507 557,419 5,444,732 17 19,338 204,360
Urban collector 426 227,369 1,831,483 48 21,817 228,315
Urban local road 462 108,682 693,490 40 6,227 45,773
Total 14,368 6,509,802 67,021,540 1,016 310,678 2,505,797
Type of Work Number of Bridges Cost to Repair
(in millions)
Daily Crossings Area of Bridges
(sq. meters)
Bridge replacement 668 $564 1,165,559 299,719
Widening & rehabilitation 2,087 $1,042 20,367,874 1,111,068
Rehabilitation 509 $73 920,843 140,842
Deck rehabilitation/replacement 3 $15 5,357 13,163
Other structural work 119 $188 969,225 163,051
Total 3,386 $1,883 23,428,858 1,727,842

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 28 in 2017

in the nation in % of structurally deficient bridges

1. Rhode Island 23.1%
26. Connecticut 7.2%
27. Kentucky 7.1%
28. California 7.0%

from 18 in 2017

in the nation in # of structurally deficient bridges

1. Iowa 4,675
17. Wisconsin 1,054
18. Kentucky 1,016
19. South Dakota 973
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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