US Bridges

C-4-710 over 3 & 20 CR

FairPosted for load

Anderson County, South Carolina · 9.6 MI NW of Anderson · Structure no. 000000000002655

Built
1958
67 years old
Condition
Fair
inspected October 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
93 ft
2 main spans
Daily traffic
125
2023 count
Owner
County
County Highway Agency

About this bridge

C-4-710 over 3 & 20 CR is a steel stringer/multi-beam or girder carrying C-4-710 over 3 & 20 CR in Anderson County, South Carolina. It was built in 1958, so it is 67 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. Its operating status is: posted for load restriction.

It carries about 125 vehicles a day, roughly 5% of them trucks, projected to reach 160 by 2043. The structure is 93 ft (28.3 m) long and 30 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

Open in Google Maps
CarriesC-4-710
Crosses3 & 20 CR
Location9.6 MI NW of Anderson
RouteCounty Highway 710
CountyAnderson County
StateSouth Carolina
Coordinates34.59028, -82.78222
Functional classRural 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 protection7 GoodSome minor problems.
Last inspectionOctober 2023
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourUnknown foundation; not evaluated for scour
Structural evaluation2: Basically intolerable, requiring high priority of replacement
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment4: Meets minimum tolerable limits to be left in place as is
Operating rating10 US tons
Inventory rating6.1 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans2
Design loadH 15
Structure length93 ft (28.3 m)
Longest span47 ft (14.3 m)
Deck width30 ft (9.2 m)
Roadway width26 ft (8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic125 (2023)
Projected traffic160 by 2043
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed5 mi (8 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$438,000 (2024 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was C-4-710 over 3 & 20 CR built?

It was built in 1958, making it 67 years old in 2025.

What condition is C-4-710 over 3 & 20 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 October 2023.

How much traffic does C-4-710 over 3 & 20 CR carry?

About 125 vehicles per day (2023 count), of which roughly 5% are trucks.

How long is C-4-710 over 3 & 20 CR?

The structure is 93 ft (28.3 m) long with a longest span of 47 ft (14.3 m) and a deck 30 ft wide.

Who owns C-4-710 over 3 & 20 CR?

It is owned by the County Highway Agency.