US Bridges

S-4-158 over Mountain Creek

Fair

Anderson County, South Carolina · 8.3 MI SW Anderson · Structure no. 000000000008319

Built
1990
35 years old
Condition
Fair
inspected January 2025
Type
Slab
Prestressed Concrete
Length
60 ft
2 main spans
Daily traffic
650
2023 count
Owner
State
State Highway Agency

About this bridge

S-4-158 over Mountain Creek is a prestressed concrete slab carrying S-4-158 over Mountain Creek in Anderson County, South Carolina. It was built in 1990, so it is 35 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 650 vehicles a day, roughly 8% of them trucks, projected to reach 1,190 by 2043. The structure is 60 ft (18.3 m) long and 38 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

Location

Open in Google Maps
CarriesS-4-158
CrossesMountain Creek
Location8.3 MI SW Anderson
RouteState Highway 158
CountyAnderson County
StateSouth Carolina
Coordinates34.41268, -82.75103
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
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
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 adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating96.1 US tons
Inventory rating51.5 US tons

Structure

Structure typeSlab
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans2
Design loadHS 20
Structure length60 ft (18.3 m)
Longest span30 ft (9.1 m)
Deck width38 ft (11.7 m)
Roadway width34 ft (10.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic650 (2023)
Projected traffic1,190 by 2043
Trucks8%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.2 mi (10 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-4-158 over Mountain Creek built?

It was built in 1990, making it 35 years old in 2025.

What condition is S-4-158 over Mountain 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-4-158 over Mountain Creek carry?

About 650 vehicles per day (2023 count), of which roughly 8% are trucks.

How long is S-4-158 over Mountain Creek?

The structure is 60 ft (18.3 m) long with a longest span of 30 ft (9.1 m) and a deck 38 ft wide.

Who owns S-4-158 over Mountain Creek?

It is owned by the State Highway Agency.