US Bridges

L-240/GREEN Bay RD over King Swamp

Fair

Berkeley County, South Carolina · 5.8 MI SE Huger · Structure no. 000000000008137

Built
1988
37 years old
Condition
Fair
inspected October 2024
Type
Channel Beam
Prestressed Concrete
Length
30 ft
1 main span
Daily traffic
250
2023 count
Owner
County
County Highway Agency

About this bridge

L-240/GREEN Bay RD over King Swamp is a prestressed concrete channel beam carrying L-240/GREEN Bay RD over King Swamp in Berkeley County, South Carolina. It was built in 1988, so it is 37 years old, younger 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 5% of them trucks, projected to reach 320 by 2043. The structure is 30 ft (9.1 m) long and 25 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

Location

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CarriesL-240/GREEN Bay RD
CrossesKing Swamp
Location5.8 MI SE Huger
RouteCounty Highway 240
CountyBerkeley County
StateSouth Carolina
Coordinates33.02493, -79.75479
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
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 inspectionOctober 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating85.3 US tons
Inventory rating45 US tons

Structure

Structure typeChannel Beam
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans1
Design loadH 15
Structure length30 ft (9.1 m)
Longest span30 ft (9.1 m)
Deck width25 ft (7.5 m)
Roadway width23 ft (7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic250 (2023)
Projected traffic320 by 2043
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.2 mi (10 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was L-240/GREEN Bay RD over King Swamp built?

It was built in 1988, making it 37 years old in 2025.

What condition is L-240/GREEN Bay RD over King 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 October 2024.

How much traffic does L-240/GREEN Bay RD over King Swamp carry?

About 250 vehicles per day (2023 count), of which roughly 5% are trucks.

How long is L-240/GREEN Bay RD over King Swamp?

The structure is 30 ft (9.1 m) long with a longest span of 30 ft (9.1 m) and a deck 25 ft wide.

Who owns L-240/GREEN Bay RD over King Swamp?

It is owned by the County Highway Agency.