US Bridges

I-26 EB over S.C.642

Fair

Charleston County, South Carolina · N Charleston · Structure no. 000000000003606

Built
1962
63 years old
Condition
Fair
inspected December 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
224 ft
4 main spans
Daily traffic
93,200
2023 count
Owner
State
State Highway Agency

About this bridge

I-26 EB over S.C.642 is a steel stringer/multi-beam or girder carrying I-26 EB over S.C.642 in Charleston County, South Carolina. It was built in 1962, so it is 63 years old, older than the South Carolina average of 48 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 5 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

It carries about 93,200 vehicles a day, roughly 4% of them trucks, projected to reach 143,528 by 2043. The structure is 224 ft (68.3 m) long and 95 ft wide.

Location

Open in Google Maps
CarriesI-26 EB
CrossesS.C.642
LocationN Charleston
RouteInterstate 26
CountyCharleston County
StateSouth Carolina
Coordinates32.85309, -79.98772
Functional classUrban Principal Arterial - Interstate

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionDecember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating53.6 US tons
Inventory rating41.1 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length224 ft (68.3 m)
Longest span56 ft (17.1 m)
Deck width95 ft (29.1 m)
Roadway width90 ft (27.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic93,200 (2023)
Projected traffic143,528 by 2043
Trucks4%
Lanes on structure6
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed—
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkNon-Interstate STRAHNET route

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedWidening with deck rehabilitation or replacement
Estimated improvement cost$585,000 (2024 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was I-26 EB over S.C.642 built?

It was built in 1962, making it 63 years old in 2025.

What condition is I-26 EB over S.C.642 in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in December 2024.

How much traffic does I-26 EB over S.C.642 carry?

About 93,200 vehicles per day (2023 count), of which roughly 4% are trucks.

How long is I-26 EB over S.C.642?

The structure is 224 ft (68.3 m) long with a longest span of 56 ft (17.1 m) and a deck 95 ft wide.

Who owns I-26 EB over S.C.642?

It is owned by the State Highway Agency.