US Bridges

US 15 over I-26

Fair

Dorchester County, South Carolina · 8.5 MI N of ST George · Structure no. 000000000003857

Built
1962
63 years old
Condition
Fair
inspected December 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
294 ft
5 main spans
Daily traffic
2,400
2023 count
Owner
State
State Highway Agency

About this bridge

US 15 over I-26 is a prestressed concrete stringer/multi-beam or girder carrying US 15 over I-26 in Dorchester 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 2,400 vehicles a day, roughly 15% of them trucks, projected to reach 3,504 by 2043. The structure is 294 ft (89.6 m) long and 62 ft wide. If it were closed, the detour would be 11.8 mi (19 km).

Location

Open in Google Maps
CarriesUS 15
CrossesI-26
Location8.5 MI N of ST George
RouteU.S. Route 15
CountyDorchester County
StateSouth Carolina
Coordinates33.28689, -80.51336
Functional classRural Major Collector

Condition and inspection

Fair

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

ComponentRatingMeaning
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionDecember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating70.3 US tons
Inventory rating38.3 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans5
Design loadHS 20
Structure length294 ft (89.6 m)
Longest span60 ft (18.3 m)
Deck width62 ft (19 m)
Roadway width54 ft (16.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,400 (2023)
Projected traffic3,504 by 2043
Trucks15%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesOverpass structure at an interchange
CrossesHighway
Detour if closed11.8 mi (19 km)
TollOn a free road
National Highway SystemNo

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 US 15 over I-26 built?

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

What condition is US 15 over I-26 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 US 15 over I-26 carry?

About 2,400 vehicles per day (2023 count), of which roughly 15% are trucks.

How long is US 15 over I-26?

The structure is 294 ft (89.6 m) long with a longest span of 60 ft (18.3 m) and a deck 62 ft wide.

Who owns US 15 over I-26?

It is owned by the State Highway Agency.