US Bridges

C-4-1104 over Rocky River

Good

Anderson County, South Carolina · 4.7 MI NE Anderson · Structure no. 000000000002469

Built
2009
16 years old
Condition
Good
inspected October 2023
Type
Truss - Thru
Steel
Length
97 ft
1 main span
Daily traffic
2,300
2023 count
Owner
County
County Highway Agency

About this bridge

C-4-1104 over Rocky River is a steel truss - thru carrying C-4-1104 over Rocky River in Anderson County, South Carolina. It was built in 2009, so it is 16 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 2,300 vehicles a day, roughly 3% of them trucks, projected to reach 4,209 by 2043. The structure is 97 ft (29.7 m) long and 36 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesC-4-1104
CrossesRocky River
Location4.7 MI NE Anderson
RouteCounty Highway 1104
CountyAnderson County
StateSouth Carolina
Coordinates34.54618, -82.58836
Functional classRural Major Collector

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.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionOctober 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 adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating66.5 US tons
Inventory rating39.7 US tons

Structure

Structure typeTruss - Thru
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length97 ft (29.7 m)
Longest span97 ft (29.6 m)
Deck width36 ft (11 m)
Roadway width36 ft (11 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,300 (2023)
Projected traffic4,209 by 2043
Trucks3%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 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-4-1104 over Rocky River built?

It was built in 2009, making it 16 years old in 2025.

What condition is C-4-1104 over Rocky River 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 October 2023.

How much traffic does C-4-1104 over Rocky River carry?

About 2,300 vehicles per day (2023 count), of which roughly 3% are trucks.

How long is C-4-1104 over Rocky River?

The structure is 97 ft (29.7 m) long with a longest span of 97 ft (29.6 m) and a deck 36 ft wide.

Who owns C-4-1104 over Rocky River?

It is owned by the County Highway Agency.