US Bridges

S-11-31 over Irene Creek

Fair

Cherokee County, South Carolina · City of Gaffney · Structure no. 000000000002003

Built
1954
71 years old
Condition
Fair
inspected October 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
54 ft
2 main spans
Daily traffic
4,000
2023 count
Owner
State
State Highway Agency

About this bridge

S-11-31 over Irene Creek is a steel continuous stringer/multi-beam or girder carrying S-11-31 over Irene Creek in Cherokee County, South Carolina. It was built in 1954, so it is 71 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 4,000 vehicles a day, roughly 3% of them trucks, projected to reach 5,640 by 2043. The structure is 54 ft (16.5 m) long and 26 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesS-11-31
CrossesIrene Creek
LocationCity of Gaffney
RouteState Highway 31
Coordinates35.07889, -81.66833
Functional classUrban 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.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionOctober 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating35.7 US tons
Inventory rating21.4 US tons

Structure

MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadH 10
Structure length54 ft (16.5 m)
Longest span28 ft (8.5 m)
Deck width26 ft (7.8 m)
Roadway width25 ft (7.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,000 (2023)
Projected traffic5,640 by 2043
Trucks3%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 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 proposedWidening with deck rehabilitation or replacement
Estimated improvement cost$203,000 (2024 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was S-11-31 over Irene Creek built?

It was built in 1954, making it 71 years old in 2025.

What condition is S-11-31 over Irene 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 October 2023.

How much traffic does S-11-31 over Irene Creek carry?

About 4,000 vehicles per day (2023 count), of which roughly 3% are trucks.

How long is S-11-31 over Irene Creek?

The structure is 54 ft (16.5 m) long with a longest span of 28 ft (8.5 m) and a deck 26 ft wide.

Who owns S-11-31 over Irene Creek?

It is owned by the State Highway Agency.