US Bridges

US 521 over Grannies Quarter Creek

Fair

Kershaw County, South Carolina · 11 MI N of Camden · Structure no. 000000000000426

Built
1930
95 years old, rebuilt 1958
Condition
Fair
inspected October 2023
Type
Tee Beam
Concrete
Length
100 ft
4 main spans
Daily traffic
3,400
2023 count
Owner
State
State Highway Agency

About this bridge

US 521 over Grannies Quarter Creek is a concrete tee beam carrying US 521 over Grannies Quarter Creek in Kershaw County, South Carolina. It was built in 1930 and reconstructed in 1958, so it is 95 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 3,400 vehicles a day, roughly 21% of them trucks, projected to reach 5,916 by 2043. The structure is 100 ft (30.5 m) long and 35 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesUS 521
CrossesGrannies Quarter Creek
Location11 MI N of Camden
RouteU.S. Route 521
CountyKershaw County
StateSouth Carolina
Coordinates34.4108, -80.59914
Functional classRural Principal Arterial - Other

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 protection8 Very GoodNo problems noted.
Last inspectionOctober 2023
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 geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating32.8 US tons
Inventory rating19.6 US tons

Structure

Structure typeTee Beam
MaterialConcrete
DeckConcrete, cast-in-place
Main spans4
Design loadHS 15
Structure length100 ft (30.5 m)
Longest span25 ft (7.6 m)
Deck width35 ft (10.8 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,400 (2023)
Projected traffic5,916 by 2043
Trucks21%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 km)
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was US 521 over Grannies Quarter Creek built?

It was built in 1930, making it 95 years old in 2025. It was reconstructed in 1958.

What condition is US 521 over Grannies Quarter 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 2023.

How much traffic does US 521 over Grannies Quarter Creek carry?

About 3,400 vehicles per day (2023 count), of which roughly 21% are trucks.

How long is US 521 over Grannies Quarter Creek?

The structure is 100 ft (30.5 m) long with a longest span of 25 ft (7.6 m) and a deck 35 ft wide.

Who owns US 521 over Grannies Quarter Creek?

It is owned by the State Highway Agency.