National Bridge Inventory: South Carolina



  • Of the 9,401 bridges in the state, 795, or 8.5 percent, are classified as structurally deficient. This means one of the key elements is in poor or worse condition.
  • This is down from 877 bridges classified as structurally deficient in 2014.
  • 29 of the structurally deficient bridges are on the Interstate Highway System.
  • 667 bridges are posted for load, which may restrict the size and weight of vehicles crossing the structure.
  • The state has identified needed repairs on 2,160 bridges at an estimated cost of $1.5 billion.
  • This compares to 1,680 bridges that needed work in 2014.

County Year Built Daily Crossings Type of Bridge Location
Richland 1958 124,800 Urban Interstate I-26 over C.N. and L. Railroad
Greenville 1960 109,700 Urban Interstate I-85 over Trib Laurel Crk
Charleston 1963 100,100 Urban Interstate I-26 EB over S.C.L. RR & Southern Rwy
Lexington 1959 97,500 Urban Interstate I-26 over SC 302
Lexington 1958 97,500 Urban Interstate I-26 over Southern Rwy (No. 1)
Lexington 1959 92,700 Urban Interstate I-26 over US 1
Richland 1977 51,300 Urban freeway/expressway SC 277 NB over I-77
Richland 1961 50,200 Urban Interstate I-126 over S.C.L. Railroad
Spartanburg 1953 38,300 Urban freeway/expressway SC 85 over S-2
Spartanburg 1953 38,300 Urban freeway/expressway SC 85 over Southern RR & S-42-995
Greenville 1939 38,000 Urban other principal arterial US 29 over Enoree River
Greenville 1939 38,000 Urban other principal arterial US 29 over Mountain Creek
Greenville 1981 37,900 Urban minor arterial SC 146 over I-385
Richland 1959 37,050 Urban Interstate I-126 WB over Southern Railroad
Lexington 1941 32,000 Urban other principal arterial US 378 over Twelve Mile Creek
Richland 1953 30,500 Urban other principal arterial US 21 over Sou & S C L RR (Blossom)
Jasper 1968 29,150 Rural Interstate I-95 SB over S.C. 46
Beaufort 1956 28,150 Urban other principal arterial US 278 EBL over Mackay Creek
Lexington 1965 27,400 Urban other principal arterial US 1 over I-20
York 1971 27,200 Rural minor arterial SC 49 over Crowders Creek
Sumter 1957 26,000 Urban other principal arterial US 76 Byp over U.S. 15
Orangeburg 1922 25,800 Urban other principal arterial US 301 over North Edisto River
Jasper 1968 25,750 Rural Interstate I-95 SB over Bagshaw Swamp
Greenville 1980 23,100 Urban minor arterial S-23-107 over I-385
Aiken 1966 22,900 Urban Interstate I-20 WB over Abandond RR (No Tracks)
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 349 465,102 8,286,025 17 25,476 325,650
Rural arterial 494 780,371 3,387,489 43 74,308 240,450
Rural minor arterial 743 778,594 3,170,879 97 91,419 371,975
Rural major collector 2,125 837,977 2,675,387 182 64,502 248,123
Rural minor collector 444 115,998 149,605 25 4,630 7,727
Rural local road 2,609 573,102 725,288 226 40,850 54,927
Urban Interstate 393 1,149,299 14,191,550 12 26,472 783,450
Urban freeway/expressway 106 282,421 1,888,689 5 6,749 151,850
Urban other principal arterial 379 885,627 7,457,947 20 32,577 389,700
Urban minor arterial 546 676,309 6,201,404 59 51,039 634,800
Urban collector 591 275,973 2,567,511 55 25,416 241,722
Urban local road 622 165,077 646,252 54 10,894 32,637
Total 9,401 6,985,851 51,348,026 795 454,332 3,483,011
Type of Work Number of Bridges Cost to Repair
(in millions)
Daily Crossings Area of Bridges
(sq. meters)
Bridge replacement 751 $433 2,066,309 306,284
Widening & rehabilitation 1,177 $986 15,877,556 1,293,384
Rehabilitation 222 $48 1,386,216 142,128
Deck rehabilitation/replacement 0 $0 0 0
Other structural work 10 $1 16,875 10,728
Total 2,160 $1,468 19,346,956 1,752,524

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.

21
from 21 in 2017

in the nation in % of structurally deficient bridges

1. Rhode Island 23.1%
20. Illinois 8.5%
21. South Carolina 8.5%
22. Wyoming 8.2%

21
from 21 in 2017

in the nation in # of structurally deficient bridges

1. Iowa 4,675
20. Tennessee 871
21. South Carolina 795
22. Texas 695
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.
  • Privacy & Cookies Policy
Connect With Us

Copyright © 2019 American Road & Transportation Builders Association