US Bridges

Sc 11 over Keowee River

Fair

Oconee County, South Carolina · 11.8 MI NE Walhalla · Structure no. 000000000005589

Built
1969
56 years old
Condition
Fair
inspected May 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
991 ft
8 main spans
Daily traffic
4,800
2023 count
Owner
State
State Highway Agency

About this bridge

Sc 11 over Keowee River is a steel continuous stringer/multi-beam or girder carrying Sc 11 over Keowee River in Oconee County, South Carolina. It was built in 1969, so it is 56 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 5 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 4,800 vehicles a day, roughly 12% of them trucks, projected to reach 7,632 by 2043. The structure is 991 ft (302.1 m) long and 36 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesSc 11
CrossesKeowee River
Location11.8 MI NE Walhalla
RouteState Highway 11
CountyOconee County
StateSouth Carolina
Coordinates34.91893, -82.90831
Functional classRural Minor Arterial

Condition and inspection

Fair

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

ComponentRatingMeaning
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure7 GoodSome minor problems.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionMay 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating41.1 US tons
Inventory rating31.7 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans8
Design loadHS 20 + Mod
Structure length991 ft (302.1 m)
Longest span137 ft (41.8 m)
Deck width36 ft (11.1 m)
Roadway width33 ft (10.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,800 (2023)
Projected traffic7,632 by 2043
Trucks12%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.7 mi (6 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState 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 Sc 11 over Keowee River built?

It was built in 1969, making it 56 years old in 2025.

What condition is Sc 11 over Keowee River 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 May 2024.

How much traffic does Sc 11 over Keowee River carry?

About 4,800 vehicles per day (2023 count), of which roughly 12% are trucks.

How long is Sc 11 over Keowee River?

The structure is 991 ft (302.1 m) long with a longest span of 137 ft (41.8 m) and a deck 36 ft wide.

Who owns Sc 11 over Keowee River?

It is owned by the State Highway Agency.