US Bridges

Sc 274 over Big Allison Creek

Poor

York County, South Carolina · 4.1 MI N of Newport · Structure no. 000000000006818

Built
1975
50 years old
Condition
Poor
inspected May 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
320 ft
4 main spans
Daily traffic
8,850
2023 count
Owner
State
State Highway Agency

About this bridge

Sc 274 over Big Allison Creek is a steel stringer/multi-beam or girder carrying Sc 274 over Big Allison Creek in York 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 poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

It carries about 8,850 vehicles a day, roughly 7% of them trucks, projected to reach 11,771 by 2043. The structure is 320 ft (97.5 m) long and 47 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

CarriesSc 274
CrossesBig Allison Creek
Location4.1 MI N of Newport
RouteState Highway 274
Coordinates35.04972, -81.09806
Functional classUrban Minor Arterial

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMay 2024
Inspection intervalevery 12 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating56.4 US tons
Inventory rating34 US tons

Structure

MaterialSteel
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length320 ft (97.5 m)
Longest span80 ft (24.4 m)
Deck width47 ft (14.4 m)
Roadway width44 ft (13.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic8,850 (2023)
Projected traffic11,771 by 2043
Trucks7%
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 statusNot eligible for the National Register of Historic Places
Work proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$580,000 (2024 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Sc 274 over Big Allison Creek built?

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

What condition is Sc 274 over Big Allison Creek in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in May 2024.

How much traffic does Sc 274 over Big Allison Creek carry?

About 8,850 vehicles per day (2023 count), of which roughly 7% are trucks.

How long is Sc 274 over Big Allison Creek?

The structure is 320 ft (97.5 m) long with a longest span of 80 ft (24.4 m) and a deck 47 ft wide.

Who owns Sc 274 over Big Allison Creek?

It is owned by the State Highway Agency.