US Bridges

S-45-26 over Mt. Hope Swamp

Fair

Williamsburg County, South Carolina · 2.7 MI W Greeleyville · Structure no. 000000000009810

Built
1961
64 years old
Condition
Fair
inspected August 2023
Type
Slab
Concrete
Length
60 ft
4 main spans
Daily traffic
275
2023 count
Owner
State
State Highway Agency

About this bridge

S-45-26 over Mt. Hope Swamp is a concrete slab carrying S-45-26 over Mt. Hope Swamp in Williamsburg 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 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 275 vehicles a day, roughly 5% of them trucks, projected to reach 352 by 2043. The structure is 60 ft (18.3 m) long and 28 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesS-45-26
CrossesMt. Hope Swamp
Location2.7 MI W Greeleyville
RouteState Highway 26
CountyWilliamsburg County
StateSouth Carolina
Coordinates33.59043, -80.03716
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.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection7 GoodSome minor problems.
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 adequacy5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment6: Equal to present minimum criteria
Operating rating30 US tons
Inventory rating17.9 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, precast panels
Main spans4
Design loadH 10
Structure length60 ft (18.3 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 traffic275 (2023)
Projected traffic352 by 2043
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 km)
TollOn a free road
National Highway SystemNo

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 S-45-26 over Mt. Hope Swamp built?

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

What condition is S-45-26 over Mt. Hope 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-45-26 over Mt. Hope Swamp carry?

About 275 vehicles per day (2023 count), of which roughly 5% are trucks.

How long is S-45-26 over Mt. Hope Swamp?

The structure is 60 ft (18.3 m) long with a longest span of 15 ft (4.6 m) and a deck 28 ft wide.

Who owns S-45-26 over Mt. Hope Swamp?

It is owned by the State Highway Agency.