US Bridges

S-45-186 over Browns Branch

Good

Williamsburg County, South Carolina · NE of Kingstree · Structure no. 000000000009475

Built
1999
26 years old
Condition
Good
inspected September 2023
Type
Slab
Concrete Continuous
Length
60 ft
2 main spans
Daily traffic
4,800
2023 count
Owner
State
State Highway Agency

About this bridge

S-45-186 over Browns Branch is a concrete continuous slab carrying S-45-186 over Browns Branch in Williamsburg County, South Carolina. It was built in 1999, so it is 26 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 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 4,800 vehicles a day, roughly 6% of them trucks, projected to reach 6,768 by 2043. The structure is 60 ft (18.3 m) long and 41 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesS-45-186
CrossesBrowns Branch
LocationNE of Kingstree
RouteState Highway 186
CountyWilliamsburg County
StateSouth Carolina
Coordinates33.68183, -79.81486
Functional classUrban 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.
Substructure8 Very GoodNo problems noted.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
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 rating49.6 US tons
Inventory rating38.3 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, precast panels
Main spans2
Design loadHS 25 or greater
Structure length60 ft (18.3 m)
Longest span30 ft (9.1 m)
Deck width41 ft (12.6 m)
Roadway width34 ft (10.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,800 (2023)
Projected traffic6,768 by 2043
Trucks6%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed1.2 mi (2 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-45-186 over Browns Branch built?

It was built in 1999, making it 26 years old in 2025.

What condition is S-45-186 over Browns Branch 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 September 2023.

How much traffic does S-45-186 over Browns Branch carry?

About 4,800 vehicles per day (2023 count), of which roughly 6% are trucks.

How long is S-45-186 over Browns Branch?

The structure is 60 ft (18.3 m) long with a longest span of 30 ft (9.1 m) and a deck 41 ft wide.

Who owns S-45-186 over Browns Branch?

It is owned by the State Highway Agency.