US Bridges

Sc 9 NB over Catawba River

Fair

Lancaster County, South Carolina · Chester CO Line · Structure no. 000000000006717

Built
1975
50 years old
Condition
Fair
inspected August 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
1,425 ft
5 main spans
Daily traffic
6,250
2023 count
Owner
State
State Highway Agency

About this bridge

Sc 9 NB over Catawba River is a steel continuous stringer/multi-beam or girder carrying Sc 9 NB over Catawba River in Lancaster County, South Carolina. It was built in 1975, so it is 50 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 6,250 vehicles a day, roughly 11% of them trucks, projected to reach 10,875 by 2043. The structure is 1,425 ft (434.2 m) long and 43 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesSc 9 NB
CrossesCatawba River
LocationChester CO Line
RouteState Highway 9
CountyLancaster County
StateSouth Carolina
Coordinates34.70889, -80.86636
Functional classRural Principal Arterial - Other

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.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionAugust 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourUnknown foundation; not evaluated for scour
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating45.3 US tons
Inventory rating29.7 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans5 (+9 approach)
Design loadHS 20
Structure length1,425 ft (434.2 m)
Longest span170 ft (51.8 m)
Deck width43 ft (13.1 m)
Roadway width39 ft (12 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic6,250 (2023)
Projected traffic10,875 by 2043
Trucks11%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemYes

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 9 NB over Catawba River built?

It was built in 1975, making it 50 years old in 2025.

What condition is Sc 9 NB over Catawba 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 August 2024.

How much traffic does Sc 9 NB over Catawba River carry?

About 6,250 vehicles per day (2023 count), of which roughly 11% are trucks.

How long is Sc 9 NB over Catawba River?

The structure is 1,425 ft (434.2 m) long with a longest span of 170 ft (51.8 m) and a deck 43 ft wide.

Who owns Sc 9 NB over Catawba River?

It is owned by the State Highway Agency.