US Bridges

C-4-617 over Trib to Rocky CR

Fair

Anderson County, South Carolina · 3.2 MI NE of Anderson · Structure no. 000000000003813

Built
1962
63 years old
Condition
Fair
inspected December 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
23 ft
1 main span
Daily traffic
175
2023 count
Owner
County
County Highway Agency

About this bridge

C-4-617 over Trib to Rocky CR is a steel stringer/multi-beam or girder carrying C-4-617 over Trib to Rocky CR in Anderson County, South Carolina. It was built in 1962, so it is 63 years old, older than the South Carolina average of 48 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 6 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

It carries about 175 vehicles a day, roughly 5% of them trucks, projected to reach 224 by 2043. The structure is 23 ft (7 m) long and 29 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesC-4-617
CrossesTrib to Rocky CR
Location3.2 MI NE of Anderson
RouteCounty Highway 617
CountyAnderson County
StateSouth Carolina
Coordinates34.54417, -82.62222
Functional classUrban Local

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionDecember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum 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 alignment5: Somewhat better than minimum adequacy to tolerate being left in place as is
Operating rating51.5 US tons
Inventory rating30.8 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadH 10
Structure length23 ft (7 m)
Longest span23 ft (7 m)
Deck width29 ft (8.7 m)
Roadway width27 ft (8.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic175 (2023)
Projected traffic224 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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was C-4-617 over Trib to Rocky CR built?

It was built in 1962, making it 63 years old in 2025.

What condition is C-4-617 over Trib to Rocky CR in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in December 2024.

How much traffic does C-4-617 over Trib to Rocky CR carry?

About 175 vehicles per day (2023 count), of which roughly 5% are trucks.

How long is C-4-617 over Trib to Rocky CR?

The structure is 23 ft (7 m) long with a longest span of 23 ft (7 m) and a deck 29 ft wide.

Who owns C-4-617 over Trib to Rocky CR?

It is owned by the County Highway Agency.