US Bridges

L-18-337 over I-26

Fair

Dorchester County, South Carolina · 8.6 MI N ST George · Structure no. 000000000003640

Built
1961
64 years old
Condition
Fair
inspected May 2023
Type
Tee Beam
Concrete
Length
262 ft
5 main spans
Daily traffic
225
2023 count
Owner
County
County Highway Agency

About this bridge

L-18-337 over I-26 is a concrete tee beam carrying L-18-337 over I-26 in Dorchester County, South Carolina. It was built in 1961, so it is 64 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 225 vehicles a day, roughly 5% of them trucks, projected to reach 288 by 2043. The structure is 262 ft (79.9 m) long and 23 ft wide.

Location

Open in Google Maps
CarriesL-18-337
CrossesI-26
Location8.6 MI N ST George
RouteCounty Highway 337
CountyDorchester County
StateSouth Carolina
Coordinates33.30445, -80.53441
Functional classRural Local

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.
Substructure7 GoodSome minor problems.
Last inspectionMay 2023
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 geometry4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating38.6 US tons
Inventory rating27.4 US tons

Structure

Structure typeTee Beam
MaterialConcrete
DeckConcrete, cast-in-place
Main spans5
Design loadHS 15
Structure length262 ft (79.9 m)
Longest span54 ft (16.5 m)
Deck width23 ft (7.1 m)
Roadway width20 ft (6.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic225 (2023)
Projected traffic288 by 2043
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed—
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedWidening with deck rehabilitation or replacement
Estimated improvement cost$617,000 (2024 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was L-18-337 over I-26 built?

It was built in 1961, making it 64 years old in 2025.

What condition is L-18-337 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 May 2023.

How much traffic does L-18-337 over I-26 carry?

About 225 vehicles per day (2023 count), of which roughly 5% are trucks.

How long is L-18-337 over I-26?

The structure is 262 ft (79.9 m) long with a longest span of 54 ft (16.5 m) and a deck 23 ft wide.

Who owns L-18-337 over I-26?

It is owned by the County Highway Agency.