US Bridges

US 521 over US 521 Bus

Good

Georgetown County, South Carolina · 4 MI S of Andrews · Structure no. 000000000010032

Built
2006
19 years old
Condition
Good
inspected May 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
219 ft
1 main span
Daily traffic
2,500
2023 count
Owner
State
State Highway Agency

About this bridge

US 521 over US 521 Bus is a steel stringer/multi-beam or girder carrying US 521 over US 521 Bus in Georgetown County, South Carolina. It was built in 2006, so it is 19 years old, younger than the South Carolina average of 48 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 2,500 vehicles a day, roughly 19% of them trucks, projected to reach 4,350 by 2043. The structure is 219 ft (66.9 m) long and 57 ft wide. If it were closed, the detour would be 5 mi (8 km).

CarriesUS 521
CrossesUS 521 Bus
Location4 MI S of Andrews
RouteU.S. Route 521
Coordinates33.43367, -79.5318
Functional classRural Principal Arterial - Other

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Last inspectionMay 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation8: Equal to present desirable criteria
Deck geometry9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating52.1 US tons
Inventory rating40 US tons

Structure

MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHS 25 or greater
Structure length219 ft (66.9 m)
Longest span210 ft (63.9 m)
Deck width57 ft (17.5 m)
Roadway width54 ft (16.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,500 (2023)
Projected traffic4,350 by 2043
Trucks19%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed5 mi (8 km)
TollOn a free road
National Highway SystemYes

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—
NavigationNot applicable (no waterway)

Frequently asked questions

When was US 521 over US 521 Bus built?

It was built in 2006, making it 19 years old in 2025.

What condition is US 521 over US 521 Bus in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in May 2024.

How much traffic does US 521 over US 521 Bus carry?

About 2,500 vehicles per day (2023 count), of which roughly 19% are trucks.

How long is US 521 over US 521 Bus?

The structure is 219 ft (66.9 m) long with a longest span of 210 ft (63.9 m) and a deck 57 ft wide.

Who owns US 521 over US 521 Bus?

It is owned by the State Highway Agency.