US Bridges

S-15-86 over Trib of Black Creek

Good

Colleton County, South Carolina · 6 MI SW Waltb · Structure no. 000000000004088

Built
2017
8 years old
Condition
Good
inspected March 2023
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
40 ft
1 main span
Daily traffic
150
2023 count
Owner
State
State Highway Agency

About this bridge

S-15-86 over Trib of Black Creek is a prestressed concrete box beam or girders - multiple carrying S-15-86 over Trib of Black Creek in Colleton County, South Carolina. It was built in 2017, so it is 8 years old, younger 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 8 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 150 vehicles a day, roughly 5% of them trucks, projected to reach 192 by 2043. The structure is 40 ft (12.2 m) long and 36 ft wide. If it were closed, the detour would be 8.1 mi (13 km).

CarriesS-15-86
CrossesTrib of Black Creek
Location6 MI SW Waltb
RouteState Highway 86
Coordinates32.86197, -80.76264
Functional classRural Local

Condition and inspection

Good

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

ComponentRatingMeaning
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionMarch 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation8: Equal to present desirable criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating87.5 US tons
Inventory rating52.1 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans1
Design loadHL 93
Structure length40 ft (12.2 m)
Longest span40 ft (12.2 m)
Deck width36 ft (11 m)
Roadway width33 ft (10.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic150 (2023)
Projected traffic192 by 2043
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed8.1 mi (13 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-15-86 over Trib of Black Creek built?

It was built in 2017, making it 8 years old in 2025.

What condition is S-15-86 over Trib of Black Creek 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 March 2023.

How much traffic does S-15-86 over Trib of Black Creek carry?

About 150 vehicles per day (2023 count), of which roughly 5% are trucks.

How long is S-15-86 over Trib of Black Creek?

The structure is 40 ft (12.2 m) long with a longest span of 40 ft (12.2 m) and a deck 36 ft wide.

Who owns S-15-86 over Trib of Black Creek?

It is owned by the State Highway Agency.