US Bridges

S-15-68 over Ireland Creek

Fair

Colleton County, South Carolina · Town of Waltb · Structure no. 000000000007239

Built
1979
46 years old
Condition
Fair
inspected January 2025
Type
Slab
Concrete
Length
90 ft
6 main spans
Daily traffic
1,500
2023 count
Owner
State
State Highway Agency

About this bridge

S-15-68 over Ireland Creek is a concrete slab carrying S-15-68 over Ireland Creek in Colleton County, South Carolina. It was built in 1979, so it is 46 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 1,500 vehicles a day, roughly 3% of them trucks, projected to reach 2,115 by 2043. The structure is 90 ft (27.4 m) long and 55 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesS-15-68
CrossesIreland Creek
LocationTown of Waltb
RouteState Highway 68
Coordinates32.90733, -80.66889
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJanuary 2025
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourUnknown foundation; not evaluated for scour
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating48.6 US tons
Inventory rating28.9 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, precast panels
Main spans6
Design loadH 15
Structure length90 ft (27.4 m)
Longest span15 ft (4.6 m)
Deck width55 ft (16.8 m)
Roadway width53 ft (16.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,500 (2023)
Projected traffic2,115 by 2043
Trucks3%
Lanes on structure4
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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was S-15-68 over Ireland Creek built?

It was built in 1979, making it 46 years old in 2025.

What condition is S-15-68 over Ireland 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-15-68 over Ireland Creek carry?

About 1,500 vehicles per day (2023 count), of which roughly 3% are trucks.

How long is S-15-68 over Ireland Creek?

The structure is 90 ft (27.4 m) long with a longest span of 15 ft (4.6 m) and a deck 55 ft wide.

Who owns S-15-68 over Ireland Creek?

It is owned by the State Highway Agency.