US Bridges

S-46-54 over Br of Big Allison CR

Fair

York County, South Carolina · 6.7 MI E York · Structure no. 000000000009381

Built
1960
65 years old, rebuilt 1998
Condition
Fair
inspected March 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
58 ft
1 main span
Daily traffic
4,900
2023 count
Owner
State
State Highway Agency

About this bridge

S-46-54 over Br of Big Allison CR is a prestressed concrete stringer/multi-beam or girder carrying S-46-54 over Br of Big Allison CR in York County, South Carolina. It was built in 1960 and reconstructed in 1998, so it is 65 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 4,900 vehicles a day, roughly 4% of them trucks, projected to reach 5,684 by 2043. The structure is 58 ft (17.7 m) long and 26 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

CarriesS-46-54
CrossesBr of Big Allison CR
Location6.7 MI E York
RouteState Highway 54
Coordinates35.05306, -81.14861
Functional classUrban 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.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionMarch 2024
Inspection intervalevery 12 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating36.4 US tons
Inventory rating21.8 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans1 (+2 approach)
Design loadH 10
Structure length58 ft (17.7 m)
Longest span30 ft (9.1 m)
Deck width26 ft (7.8 m)
Roadway width24 ft (7.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,900 (2023)
Projected traffic5,684 by 2043
Trucks4%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$410,000 (2024 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was S-46-54 over Br of Big Allison CR built?

It was built in 1960, making it 65 years old in 2025. It was reconstructed in 1998.

What condition is S-46-54 over Br of Big Allison 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 March 2024.

How much traffic does S-46-54 over Br of Big Allison CR carry?

About 4,900 vehicles per day (2023 count), of which roughly 4% are trucks.

How long is S-46-54 over Br of Big Allison CR?

The structure is 58 ft (17.7 m) long with a longest span of 30 ft (9.1 m) and a deck 26 ft wide.

Who owns S-46-54 over Br of Big Allison CR?

It is owned by the State Highway Agency.