US Bridges

S-299/OLD Bell RD over Trib to Polk Swamp

Fair

Dorchester County, South Carolina · 4.4 MI S of ST George · Structure no. 000000000003639

Built
1961
64 years old
Condition
Fair
inspected May 2023
Type
Slab
Concrete
Length
45 ft
3 main spans
Daily traffic
250
2023 count
Owner
State
State Highway Agency

About this bridge

S-299/OLD Bell RD over Trib to Polk Swamp is a concrete slab carrying S-299/OLD Bell RD over Trib to Polk Swamp in Dorchester County, South Carolina. It was built in 1961, so it is 64 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 6 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 250 vehicles a day, roughly 13% of them trucks, projected to reach 365 by 2043. The structure is 45 ft (13.7 m) long and 28 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

CarriesS-299/OLD Bell RD
CrossesTrib to Polk Swamp
Location4.4 MI S of ST George
RouteState Highway 299
Coordinates33.12349, -80.57988
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.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionMay 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourUnknown foundation; not evaluated for scour
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating47.5 US tons
Inventory rating28.5 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, precast panels
Main spans3
Design loadH 15
Structure length45 ft (13.7 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 traffic250 (2023)
Projected traffic365 by 2043
Trucks13%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 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-299/OLD Bell RD over Trib to Polk Swamp built?

It was built in 1961, making it 64 years old in 2025.

What condition is S-299/OLD Bell RD over Trib to Polk Swamp 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-299/OLD Bell RD over Trib to Polk Swamp carry?

About 250 vehicles per day (2023 count), of which roughly 13% are trucks.

How long is S-299/OLD Bell RD over Trib to Polk Swamp?

The structure is 45 ft (13.7 m) long with a longest span of 15 ft (4.6 m) and a deck 28 ft wide.

Who owns S-299/OLD Bell RD over Trib to Polk Swamp?

It is owned by the State Highway Agency.