US Bridges

S-18-18 over Cattle Creek

Fair

Dorchester County, South Carolina · 8.4MI W of ST George · Structure no. 000000000008735

Built
1994
31 years old
Condition
Fair
inspected January 2025
Type
Slab
Concrete Continuous
Length
180 ft
6 main spans
Daily traffic
175
2023 count
Owner
State
State Highway Agency

About this bridge

S-18-18 over Cattle Creek is a concrete continuous slab carrying S-18-18 over Cattle Creek in Dorchester County, South Carolina. It was built in 1994, so it is 31 years old, younger 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 175 vehicles a day, roughly 11% of them trucks, projected to reach 243 by 2043. The structure is 180 ft (54.9 m) long and 33 ft wide. If it were closed, the detour would be 8.1 mi (13 km).

Location

Open in Google Maps
CarriesS-18-18
CrossesCattle Creek
Location8.4MI W of ST George
RouteState Highway 18
CountyDorchester County
StateSouth Carolina
Coordinates33.19858, -80.69263
Functional classRural Minor 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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJanuary 2025
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating57.9 US tons
Inventory rating44.6 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans6
Design loadHS 20
Structure length180 ft (54.9 m)
Longest span30 ft (9.1 m)
Deck width33 ft (10.1 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic175 (2023)
Projected traffic243 by 2043
Trucks11%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed8.1 mi (13 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was S-18-18 over Cattle Creek built?

It was built in 1994, making it 31 years old in 2025.

What condition is S-18-18 over Cattle Creek 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 January 2025.

How much traffic does S-18-18 over Cattle Creek carry?

About 175 vehicles per day (2023 count), of which roughly 11% are trucks.

How long is S-18-18 over Cattle Creek?

The structure is 180 ft (54.9 m) long with a longest span of 30 ft (9.1 m) and a deck 33 ft wide.

Who owns S-18-18 over Cattle Creek?

It is owned by the State Highway Agency.