US Bridges

S-3-39 over Jackson Branch

Fair

Allendale County, South Carolina · 3MI N Allendale · Structure no. 000000000005879

Built
1971
54 years old
Condition
Fair
inspected May 2023
Type
Slab
Concrete
Length
30 ft
2 main spans
Daily traffic
100
2023 count
Owner
State
State Highway Agency

About this bridge

S-3-39 over Jackson Branch is a concrete slab carrying S-3-39 over Jackson Branch in Allendale County, South Carolina. It was built in 1971, so it is 54 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 100 vehicles a day, roughly 19% of them trucks, projected to reach 146 by 2043. The structure is 30 ft (9.1 m) long and 28 ft wide. If it were closed, the detour would be 6.8 mi (11 km).

CarriesS-3-39
CrossesJackson Branch
Location3MI N Allendale
RouteState Highway 39
Coordinates33.05371, -81.30872
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 above top of footing
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 alignment8: Equal to present desirable criteria
Operating rating34 US tons
Inventory rating20.4 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, precast panels
Main spans2
Design loadH 10
Structure length30 ft (9.1 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 traffic100 (2023)
Projected traffic146 by 2043
Trucks19%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.8 mi (11 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-3-39 over Jackson Branch built?

It was built in 1971, making it 54 years old in 2025.

What condition is S-3-39 over Jackson Branch 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-3-39 over Jackson Branch carry?

About 100 vehicles per day (2023 count), of which roughly 19% are trucks.

How long is S-3-39 over Jackson Branch?

The structure is 30 ft (9.1 m) long with a longest span of 15 ft (4.6 m) and a deck 28 ft wide.

Who owns S-3-39 over Jackson Branch?

It is owned by the State Highway Agency.