US Bridges

C-39-1929 over Trib N Fork 12 Mile Ck

GoodPosted for load

Pickens County, South Carolina · 3 MI NW of Pickens · Structure no. 000000000003456

Built
1960
65 years old
Condition
Good
inspected March 2024
Type
Channel Beam
Prestressed Concrete
Length
30 ft
1 main span
Daily traffic
200
2023 count
Owner
County
County Highway Agency

About this bridge

C-39-1929 over Trib N Fork 12 Mile Ck is a prestressed concrete channel beam carrying C-39-1929 over Trib N Fork 12 Mile Ck in Pickens County, South Carolina. It was built in 1960, so it is 65 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. Its operating status is: posted for load restriction.

It carries about 200 vehicles a day, roughly 5% of them trucks, projected to reach 256 by 2043. The structure is 30 ft (9.1 m) long and 23 ft wide.

CarriesC-39-1929
CrossesTrib N Fork 12 Mile Ck
Location3 MI NW of Pickens
RouteCounty Highway 1929
Coordinates34.91747, -82.71732
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
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure8 Very GoodNo problems noted.
Channel and channel protection7 GoodSome minor problems.
Last inspectionMarch 2024
Inspection intervalevery 12 months
Operating statusPosted for load restriction
ScourFoundations stable; scour above top of footing
Structural evaluation2: Basically intolerable, requiring high priority of replacement
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating16.4 US tons
Inventory rating6.4 US tons

Structure

Structure typeChannel Beam
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans1
Design loadH 10
Structure length30 ft (9.1 m)
Longest span30 ft (9.1 m)
Deck width23 ft (7.1 m)
Roadway width22 ft (6.6 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 closed—
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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$206,000 (2024 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was C-39-1929 over Trib N Fork 12 Mile Ck built?

It was built in 1960, making it 65 years old in 2025.

What condition is C-39-1929 over Trib N Fork 12 Mile Ck 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-39-1929 over Trib N Fork 12 Mile Ck carry?

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

How long is C-39-1929 over Trib N Fork 12 Mile Ck?

The structure is 30 ft (9.1 m) long with a longest span of 30 ft (9.1 m) and a deck 23 ft wide.

Who owns C-39-1929 over Trib N Fork 12 Mile Ck?

It is owned by the County Highway Agency.