US Bridges

S-26-608 over Big Cypress Swamp

Fair

Horry County, South Carolina · 8MI SW Conway · Structure no. 000000000004817

Built
1966
59 years old
Condition
Fair
inspected August 2023
Type
Slab
Concrete
Length
45 ft
3 main spans
Daily traffic
300
2023 count
Owner
State
State Highway Agency

About this bridge

S-26-608 over Big Cypress Swamp is a concrete slab carrying S-26-608 over Big Cypress Swamp in Horry County, South Carolina. It was built in 1966, so it is 59 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 300 vehicles a day, roughly 10% of them trucks, projected to reach 438 by 2043. The structure is 45 ft (13.7 m) long and 28 ft wide.

CarriesS-26-608
CrossesBig Cypress Swamp
Location8MI SW Conway
RouteState Highway 608
Coordinates33.78789, -79.16637
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 inspectionAugust 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourUnknown foundation; not evaluated for scour
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating30 US tons
Inventory rating17.9 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, precast panels
Main spans3
Design loadH 10
Structure length45 ft (13.7 m)
Longest span15 ft (4.6 m)
Deck width28 ft (8.6 m)
Roadway width26 ft (7.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic300 (2023)
Projected traffic438 by 2043
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed—
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-26-608 over Big Cypress Swamp built?

It was built in 1966, making it 59 years old in 2025.

What condition is S-26-608 over Big Cypress 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 August 2023.

How much traffic does S-26-608 over Big Cypress Swamp carry?

About 300 vehicles per day (2023 count), of which roughly 10% are trucks.

How long is S-26-608 over Big Cypress 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-26-608 over Big Cypress Swamp?

It is owned by the State Highway Agency.