US Bridges

I-26 over S-1110 & RR NS

Fair

Charleston County, South Carolina · In Charleston · Structure no. 000000000004720

Built
1966
59 years old
Condition
Fair
inspected August 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
779 ft
3 main spans
Daily traffic
87,800
2023 count
Owner
State
State Highway Agency

About this bridge

I-26 over S-1110 & RR NS is a steel stringer/multi-beam or girder carrying I-26 over S-1110 & RR NS in Charleston County, South Carolina. It was built in 1966, so it is 59 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 6 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 87,800 vehicles a day, roughly 5% of them trucks, projected to reach 135,212 by 2043. The structure is 779 ft (237.4 m) long and 102 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesI-26
CrossesS-1110 & RR NS
LocationIn Charleston
RouteInterstate 26
CountyCharleston County
StateSouth Carolina
Coordinates32.83515, -79.96005
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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionAugust 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating56.8 US tons
Inventory rating30.3 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans3 (+10 approach)
Design loadH 20
Structure length779 ft (237.4 m)
Longest span89 ft (27.1 m)
Deck width102 ft (31 m)
Roadway width94 ft (28.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic87,800 (2023)
Projected traffic135,212 by 2043
Trucks5%
Lanes on structure6
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway and railroad
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkInterstate STRAHNET route

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNot applicable (no waterway)

Frequently asked questions

When was I-26 over S-1110 & RR NS built?

It was built in 1966, making it 59 years old in 2025.

What condition is I-26 over S-1110 & RR NS 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 August 2024.

How much traffic does I-26 over S-1110 & RR NS carry?

About 87,800 vehicles per day (2023 count), of which roughly 5% are trucks.

How long is I-26 over S-1110 & RR NS?

The structure is 779 ft (237.4 m) long with a longest span of 89 ft (27.1 m) and a deck 102 ft wide.

Who owns I-26 over S-1110 & RR NS?

It is owned by the State Highway Agency.