US Bridges

S-3-18 over Miller Creek

Fair

Allendale County, South Carolina · 4MI NE Fairfax · Structure no. 000000000007059

Built
1978
47 years old
Condition
Fair
inspected May 2023
Type
Slab
Concrete
Length
75 ft
5 main spans
Daily traffic
225
2023 count
Owner
State
State Highway Agency

About this bridge

S-3-18 over Miller Creek is a concrete slab carrying S-3-18 over Miller Creek in Allendale County, South Carolina. It was built in 1978, so it is 47 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 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 14% of them trucks, projected to reach 329 by 2043. The structure is 75 ft (22.9 m) long and 33 ft wide. If it were closed, the detour would be 5 mi (8 km).

CarriesS-3-18
CrossesMiller Creek
Location4MI NE Fairfax
RouteState Highway 18
Coordinates32.98408, -81.17928
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection7 GoodSome minor problems.
Last inspectionMay 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry6: Equal to present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating46.7 US tons
Inventory rating27.9 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, precast panels
Main spans5
Design loadH 15
Structure length75 ft (22.9 m)
Longest span15 ft (4.6 m)
Deck width33 ft (10.1 m)
Roadway width31 ft (9.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic225 (2023)
Projected traffic329 by 2043
Trucks14%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed5 mi (8 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—
NavigationNo navigation control on waterway

Frequently asked questions

When was S-3-18 over Miller Creek built?

It was built in 1978, making it 47 years old in 2025.

What condition is S-3-18 over Miller 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 May 2023.

How much traffic does S-3-18 over Miller Creek carry?

About 225 vehicles per day (2023 count), of which roughly 14% are trucks.

How long is S-3-18 over Miller Creek?

The structure is 75 ft (22.9 m) long with a longest span of 15 ft (4.6 m) and a deck 33 ft wide.

Who owns S-3-18 over Miller Creek?

It is owned by the State Highway Agency.