US Bridges

S-27-87 over Coosawhatchie River

Good

Jasper County, South Carolina · 14.8MI N Ridgeland · Structure no. 000000000006712

Built
1975
50 years old
Condition
Good
inspected January 2025
Type
Slab
Concrete
Length
570 ft
19 main spans
Daily traffic
500
2023 count
Owner
State
State Highway Agency

About this bridge

S-27-87 over Coosawhatchie River is a concrete slab carrying S-27-87 over Coosawhatchie River in Jasper County, South Carolina. It was built in 1975, so it is 50 years old, older than the South Carolina average of 48 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 500 vehicles a day, roughly 12% of them trucks, projected to reach 730 by 2043. The structure is 570 ft (173.7 m) long and 33 ft wide. If it were closed, the detour would be 9.9 mi (16 km).

CarriesS-27-87
CrossesCoosawhatchie River
Location14.8MI N Ridgeland
RouteState Highway 87
Coordinates32.69753, -80.96583
Functional classRural Major Collector

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJanuary 2025
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating38.9 US tons
Inventory rating30 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans19
Design loadHS 15
Structure length570 ft (173.7 m)
Longest span30 ft (9.1 m)
Deck width33 ft (10.1 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic500 (2023)
Projected traffic730 by 2043
Trucks12%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed9.9 mi (16 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-27-87 over Coosawhatchie River built?

It was built in 1975, making it 50 years old in 2025.

What condition is S-27-87 over Coosawhatchie River in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in January 2025.

How much traffic does S-27-87 over Coosawhatchie River carry?

About 500 vehicles per day (2023 count), of which roughly 12% are trucks.

How long is S-27-87 over Coosawhatchie River?

The structure is 570 ft (173.7 m) long with a longest span of 30 ft (9.1 m) and a deck 33 ft wide.

Who owns S-27-87 over Coosawhatchie River?

It is owned by the State Highway Agency.