US Bridges

S-15-34 over Trib to Allen Creek

Fair

Colleton County, South Carolina · 7.2 MI NE Waltb · Structure no. 000000000005002

Built
1967
58 years old
Condition
Fair
inspected February 2025
Type
Slab
Concrete
Length
45 ft
3 main spans
Daily traffic
1,000
2023 count
Owner
State
State Highway Agency

About this bridge

S-15-34 over Trib to Allen Creek is a concrete slab carrying S-15-34 over Trib to Allen Creek in Colleton County, South Carolina. It was built in 1967, so it is 58 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 1,000 vehicles a day, roughly 10% of them trucks, projected to reach 1,460 by 2043. The structure is 45 ft (13.7 m) long and 28 ft wide. If it were closed, the detour would be 8.1 mi (13 km).

Location

Open in Google Maps
CarriesS-15-34
CrossesTrib to Allen Creek
Location7.2 MI NE Waltb
RouteState Highway 34
CountyColleton County
StateSouth Carolina
Coordinates33.00116, -80.63461
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.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionFebruary 2025
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourUnknown foundation; not evaluated for scour
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating47.5 US tons
Inventory rating28.2 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, precast panels
Main spans3
Design loadH 15
Structure length45 ft (13.7 m)
Longest span15 ft (4.6 m)
Deck width28 ft (8.4 m)
Roadway width26 ft (7.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,000 (2023)
Projected traffic1,460 by 2043
Trucks10%
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 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-15-34 over Trib to Allen Creek built?

It was built in 1967, making it 58 years old in 2025.

What condition is S-15-34 over Trib to Allen 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 February 2025.

How much traffic does S-15-34 over Trib to Allen Creek carry?

About 1,000 vehicles per day (2023 count), of which roughly 10% are trucks.

How long is S-15-34 over Trib to Allen Creek?

The structure is 45 ft (13.7 m) long with a longest span of 15 ft (4.6 m) and a deck 28 ft wide.

Who owns S-15-34 over Trib to Allen Creek?

It is owned by the State Highway Agency.