US Bridges

C-26-1645 over Brunson Swamp

Good

Horry County, South Carolina · 4.0 MI SE of Aynor · Structure no. 000000000008879

Built
2017
8 years old
Condition
Good
inspected November 2023
Type
Culvert
Concrete
Length
28 ft
2 main spans
Daily traffic
250
2023 count
Owner
County
County Highway Agency

About this bridge

C-26-1645 over Brunson Swamp is a concrete culvert carrying C-26-1645 over Brunson Swamp in Horry 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 250 vehicles a day, roughly 5% of them trucks, projected to reach 320 by 2043. The structure is 28 ft (8.5 m) long and 37 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

CarriesC-26-1645
CrossesBrunson Swamp
Location4.0 MI SE of Aynor
RouteCounty Highway 1645
Coordinates33.95583, -79.15722
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
Channel and channel protection8 Very GoodNo problems noted.
Culvert8 Very GoodNo problems noted.
Last inspectionNovember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation8: Equal to present desirable criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating46.7 US tons
Inventory rating36 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans2
Design loadH 10
Structure length28 ft (8.5 m)
Longest span12 ft (3.7 m)
Deck width37 ft (11.3 m)
Roadway width29 ft (8.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic250 (2023)
Projected traffic320 by 2043
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty 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 C-26-1645 over Brunson Swamp built?

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

What condition is C-26-1645 over Brunson Swamp 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 November 2023.

How much traffic does C-26-1645 over Brunson Swamp carry?

About 250 vehicles per day (2023 count), of which roughly 5% are trucks.

How long is C-26-1645 over Brunson Swamp?

The structure is 28 ft (8.5 m) long with a longest span of 12 ft (3.7 m) and a deck 37 ft wide.

Who owns C-26-1645 over Brunson Swamp?

It is owned by the County Highway Agency.