US Bridges

C-39-1635 over Trib to Twelve Mile Crk

Good

Pickens County, South Carolina · 3 MI N of Pickens · Structure no. 000000000010798

Built
2022
3 years old
Condition
Good
inspected March 2024
Type
Slab
Prestressed Concrete
Length
45 ft
1 main span
Daily traffic
200
2023 count
Owner
County
County Highway Agency

About this bridge

C-39-1635 over Trib to Twelve Mile Crk is a prestressed concrete slab carrying C-39-1635 over Trib to Twelve Mile Crk in Pickens County, South Carolina. It was built in 2022, so it is 3 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 200 vehicles a day, roughly 5% of them trucks, projected to reach 256 by 2043. The structure is 45 ft (13.7 m) long and 27 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesC-39-1635
CrossesTrib to Twelve Mile Crk
Location3 MI N of Pickens
RouteCounty Highway 1635
Coordinates34.92579, -82.72205
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 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourUnknown foundation; not evaluated for scour
Structural evaluation8: Equal to present desirable criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating72.1 US tons
Inventory rating55.7 US tons

Structure

Structure typeSlab
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans1
Design loadHS 25 or greater
Structure length45 ft (13.7 m)
Longest span45 ft (13.7 m)
Deck width27 ft (8.2 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic200 (2023)
Projected traffic256 by 2043
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$272,000 (2024 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was C-39-1635 over Trib to Twelve Mile Crk built?

It was built in 2022, making it 3 years old in 2025.

What condition is C-39-1635 over Trib to Twelve Mile Crk 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 2024.

How much traffic does C-39-1635 over Trib to Twelve Mile Crk carry?

About 200 vehicles per day (2023 count), of which roughly 5% are trucks.

How long is C-39-1635 over Trib to Twelve Mile Crk?

The structure is 45 ft (13.7 m) long with a longest span of 45 ft (13.7 m) and a deck 27 ft wide.

Who owns C-39-1635 over Trib to Twelve Mile Crk?

It is owned by the County Highway Agency.