National Bridge Inventory: Kentucky



  • Of the 14,422 bridges in the state, 1,033, or 7.2 percent, are classified as structurally deficient. This means one of the key elements is in poor or worse condition.
  • This is down from 1,059 bridges classified as structurally deficient in 2016.
  • The deck area of structurally deficient bridges accounts for 4.9 percent of total deck area on all structures.
  • 25 of the structurally deficient bridges are on the Interstate Highway System. A total of 96.4 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.
  • 4,569 bridges are posted for load, which may restrict the size and weight of vehicles crossing the structure.
  • The state has identified needed repairs on 3,328 bridges at an estimated cost of $2.7 billion.
  • This compares to 3,502 bridges that needed work in 2016.

County Year Built Daily Crossings Type of Bridge Location
Jefferson 1959 119,880 Urban Interstate I-65 over S Brook, E Kentucky St
Jefferson 1957 119,880 Urban Interstate I-65 over Hill, CSX RR & Burnett
Jefferson 1965 90,900 Urban Interstate I-64 over CSX,1St,Flyd,Prestn,Rvr
Jefferson 1972 89,929 Urban Interstate I-64 over 3rd,5th,Rvr Rd,Belvedere
Jefferson 1974 86,651 Urban Interstate I-264 EB over Ramp(31W NB to 264WB)
Jefferson 1976 72,032 Urban Interstate I-64 over Old P and L RR (7-13 St)
Jefferson 1984 71,930 Urban Interstate I-265 over Avoca-Quarry Rd
Jefferson 1970 67,529 Urban Interstate I-264 over P and L Railway Wye
Jefferson 1969 65,180 Urban Interstate I-64 Ramp over N Western Pkwy (Ky 3064)
Jefferson 1967 41,584 Urban other principal arterial US 42 over I-264
Jefferson 1968 41,276 Urban Interstate I-64 EB over Grinstead Dr
Jefferson 1968 37,300 Urban Interstate I-64 WB over Grinstead Dr
Jefferson 1966 36,217 Urban Interstate I-64 EB over Mid Fk Beargrass Creek
Jefferson 1966 36,217 Urban Interstate I-64 WB over Mid Fk Beargrass Creek
Jefferson 1967 35,348 Urban Interstate I-71 SB over US 42
Kenton 1974 29,085 Urban minor arterial US25/US42/US127 over Ohio River
Jefferson 1956 29,000 Urban other principal arterial Buechel Bp(US 31E) over Norfolk Southern RR
Jefferson 1965 28,333 Urban minor arterial Ky 864 over Br of Greasy Ditch
Franklin 1962 25,659 Rural Interstate I-64 WB over Ky 420, Cedar Run
Franklin 1963 25,659 Rural Interstate I-64 WB over Kentucky River
Franklin 1962 25,659 Rural Interstate I-64 EB over Ky 420, Cedar Run
Franklin 1963 25,659 Rural Interstate I-64 EB over Kentucky River
Fayette 1963 23,523 Urban minor arterial US-25 over I-75
Shelby 1960 22,999 Rural Interstate I-64 WB over Bardstown Trl, Goose Ck
Franklin 1960 22,999 Rural Interstate I-64 WB over Ky 151
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 464 535,113 8,776,191 10 16,100 219,873
Rural arterial 767 1,011,705 4,848,822 7 13,199 63,538
Rural minor arterial 670 471,480 2,823,689 23 19,422 88,243
Rural major collector 1,924 752,530 3,951,816 125 37,175 230,130
Rural minor collector 2,431 578,036 1,636,326 213 40,773 143,559
Rural local road 5,886 832,361 1,273,250 532 56,158 108,073
Urban Interstate 468 937,804 28,846,216 15 82,530 992,621
Urban freeway/expressway 132 141,356 3,081,072 0 0 0
Urban other principal arterial 285 460,000 4,132,803 6 6,010 113,950
Urban minor arterial 507 558,128 5,524,392 23 31,187 254,789
Urban collector 425 227,522 1,780,846 40 17,214 138,377
Urban local road 463 109,667 682,773 39 6,145 41,380
Total 14,422 6,615,702 67,358,196 1,033 325,915 2,394,533
Type of Work Number of Bridges Cost to Repair
(in millions)
Daily Crossings Area of Bridges
(sq. meters)
Bridge replacement 627 $675 1,140,916 286,490
Widening & rehabilitation 2,041 $1,541 20,318,114 1,101,425
Rehabilitation 533 $241 829,610 140,239
Deck rehabilitation/replacement 3 $16 5,712 13,163
Other structural work 124 $205 1,050,109 163,920
Total 3,328 $2,677 23,344,461 1,705,236

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.

24
Compared to 27 in 2019

in the nation in % of structurally deficient bridges

1. West Virginia 21.2%
23. Hawaii 7.3%
24. Kentucky 7.2%
25. Montana 7.2%

18
Compared to 18 in 2019

in the nation in # of structurally deficient bridges

1. Iowa 4,571
17. South Dakota 1,038
18. Kentucky 1,033
19. Wisconsin 979

27
Compared to 29 in 2019

in the nation in % of structurally deficient bridge deck area

1. Rhode Island 21.0%
26. Idaho 5.0%
27. Kentucky 5.0%
28. Nebraska 5.0%
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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