How many bridges are in South Carolina?

South Carolina has 5,396 public highway bridges tracked in the FHWA National Bridge Inventory. View detailed condition data for each bridge on PlainBridges.

What percentage of bridges in South Carolina are in Poor condition?

6.1% of bridge records in South Carolina are in Poor condition, meaning the lowest applicable major-component rating is 4 or below, compared with 7.0% across state inventories.

State profile · Near median Poor share

South Carolina bridge safety

Condition ratings, load ratings, and Poor-condition data for every public highway bridge in South Carolina, based on the FHWA National Bridge Inventory.

Compiled by PlainBridges, Independent data publisher

5,396
Public bridges: 34.8%
Good condition: 6.1%
Poor condition

Data updated May 2026

Total Bridges

5,396

Public highway bridges in South Carolina

Good Condition

34.8%

1,876 bridges rated 7-9

-15.2pp vs 50% benchmark

Poor Condition

6.1%

329 bridges whose lowest applicable component is rated 0-4

-0.9pp vs national avg 7.0%

South Carolina vs national bridge condition

South Carolina - Good condition share 34.8%

National avg

Share of bridges rated 7-9 on the FHWA 0-9 scale (deck, superstructure, substructure all good).

South Carolina - Poor-condition share 20.3%

National avg

Lower is better. Bar maxes at 30% (worst-state ceiling). National average sits at 7.0%.

Condition Distribution

Bridge inventory deck-condition mix - South Carolina (FHWA NBI)

South Carolina vs nearby ranks

Adjacent states by Poor-condition share (lower share = better)

States are ranked by the share of bridges whose lowest applicable component rating is 4 or below. This describes recorded condition; it does not measure funding effectiveness or live crossing safety. States here sit immediately above and below South Carolina on the same metric.

Idaho

5.51% top marginal rate

Structure: Progressive
Burden @ $100K: $1,742

Mississippi

5.92% top marginal rate

Structure: Progressive
Burden @ $100K: $16,823

Selected

South Carolina

6.10% top marginal rate

Structure: Progressive
Burden @ $100K: $5,396

Wisconsin

6.13% top marginal rate

Structure: Progressive
Burden @ $100K: $14,851

North Carolina

6.16% top marginal rate

Structure: Progressive
Burden @ $100K: $18,901

Bridges Needing Most Attention in South Carolina

Six lowest-condition bridges in South Carolina, ranked by the portal's composite display score. Inspection intervals are risk-based under current NBIS rules.

C-20-60

Poor

Over: BR OF MORRIS CR

8.4 MI SW OF WINNSBORO, Fairfield, SC

Built 1960 Load: 0.3 t ADT: 125

S-12-353

Poor

Over: BEAVER DAM CREEK

3MI NW GREAT FALLS, Chester, SC

Built 1974 Load: 0.6 t ADT: 200

C-30-548

Poor

Over: NORTH RABON CREEK

11.5MI NW OF LAURENS, Laurens, SC

Built 1989 Load: 0.6 t ADT: 200

S-34-64

Poor

Over: PITCH POT SWAMP

4MI W MARION, Marion, SC

Built 1967 Load: 1.0 t ADT: 200

S-39-250

Poor

Over: MACHINE CREEK

8.0 MI N EASLEY, Pickens, SC

Built 1963 Load: 1.0 t ADT: 2,400

C-11-288

Poor

Over: BR BROAD RIVER

3.8 MI SW BLACKBURG, Cherokee, SC

Built 1992 Load: 1.3 t ADT: 200

All Bridges in South Carolina

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South Carolina vs national bridge condition

Condition Distribution

Counties (46)

Bridges Needing Most Attention in South Carolina

C-20-60

S-12-353

C-30-548

S-34-64

S-39-250

C-11-288

All Bridges in South Carolina

S-20-101

S-21-461

S-23-33

S-30-340

C-37-726

C-39-2514

S-44-24

S-46-81

US 21

S-12-300

S-14-351

SC 200

S-21-278

C-23-1986

C-23-639

C-23-1728

C-23-355

S-25-69

S-30-54

S-30-40

S-30-108

S-32-54

SC 34

S-36-43

L-40-51

S-45-28

S-46-188

C-4-647

S-7-200

S-15-86

C-23-3952

S-30-260

S-30-116

S-32-301

C-39-598

S-42-2049

S-45-51

SC 28

C-4-570

SC 63

S-15-40

S-15-40

I-95 SB

S-20-32

S-28-700

I-26 WB

S-32-647

S-36-403

C-39-274

S-1-125

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