US Bridges

S-45-525 over Johnson Swamp Creek

Fair

Williamsburg County, South Carolina · 1.0 MI N Andrews · Structure no. 000000000006020

Built
1971
54 years old, rebuilt 1995
Condition
Fair
inspected October 2024
Type
Slab
Concrete
Length
210 ft
14 main spans
Daily traffic
450
2023 count
Owner
State
State Highway Agency

About this bridge

S-45-525 over Johnson Swamp Creek is a concrete slab carrying S-45-525 over Johnson Swamp Creek in Williamsburg County, South Carolina. It was built in 1971 and reconstructed in 1995, 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 450 vehicles a day, roughly 5% of them trucks, projected to reach 576 by 2043. The structure is 210 ft (64 m) long and 28 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesS-45-525
CrossesJohnson Swamp Creek
Location1.0 MI N Andrews
RouteState Highway 525
Coordinates33.4702, -79.57644
Functional classRural Local

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
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 protection8 Very GoodNo problems noted.
Last inspectionOctober 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourUnknown foundation; not evaluated for scour
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating28.9 US tons
Inventory rating17.2 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, precast panels
Main spans14
Design loadH 10
Structure length210 ft (64 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 traffic450 (2023)
Projected traffic576 by 2043
Trucks5%
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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was S-45-525 over Johnson Swamp Creek built?

It was built in 1971, making it 54 years old in 2025. It was reconstructed in 1995.

What condition is S-45-525 over Johnson Swamp 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 2024.

How much traffic does S-45-525 over Johnson Swamp Creek carry?

About 450 vehicles per day (2023 count), of which roughly 5% are trucks.

How long is S-45-525 over Johnson Swamp Creek?

The structure is 210 ft (64 m) long with a longest span of 15 ft (4.6 m) and a deck 28 ft wide.

Who owns S-45-525 over Johnson Swamp Creek?

It is owned by the State Highway Agency.