US Bridges

US 521 SB over CSX Railroad

Good

Georgetown County, South Carolina · Andrews · Structure no. 000000000010034

Built
2006
19 years old
Condition
Good
inspected May 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
113 ft
1 main span
Daily traffic
1,250
2023 count
Owner
State
State Highway Agency

About this bridge

US 521 SB over CSX Railroad is a prestressed concrete stringer/multi-beam or girder carrying US 521 SB over CSX Railroad 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 8 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 1,250 vehicles a day, roughly 19% of them trucks, projected to reach 2,175 by 2043. The structure is 113 ft (34.4 m) long and 47 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesUS 521 SB
CrossesCSX Railroad
LocationAndrews
RouteU.S. Route 521
Coordinates33.43167, -79.5675
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
Deck8 Very GoodNo problems noted.
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 rating78.6 US tons
Inventory rating53.9 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 25 or greater
Structure length113 ft (34.4 m)
Longest span113 ft (34.4 m)
Deck width47 ft (14.3 m)
Roadway width44 ft (13.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,250 (2023)
Projected traffic2,175 by 2043
Trucks19%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesRailroad
Detour if closed1.2 mi (2 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 SB over CSX Railroad built?

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

What condition is US 521 SB over CSX Railroad 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 SB over CSX Railroad carry?

About 1,250 vehicles per day (2023 count), of which roughly 19% are trucks.

How long is US 521 SB over CSX Railroad?

The structure is 113 ft (34.4 m) long with a longest span of 113 ft (34.4 m) and a deck 47 ft wide.

Who owns US 521 SB over CSX Railroad?

It is owned by the State Highway Agency.