US Bridges

S-44-481 over Isaacs Creek

Fair

Union County, South Carolina · 7.8 MI SW Union · Structure no. 000000000007412

Built
1980
45 years old
Condition
Fair
inspected June 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
120 ft
4 main spans
Daily traffic
275
2023 count
Owner
State
State Highway Agency

About this bridge

S-44-481 over Isaacs Creek is a prestressed concrete stringer/multi-beam or girder carrying S-44-481 over Isaacs Creek in Union County, South Carolina. It was built in 1980, so it is 45 years old, younger 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.

It carries about 275 vehicles a day, roughly 3% of them trucks, projected to reach 352 by 2043. The structure is 120 ft (36.6 m) long and 35 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesS-44-481
CrossesIsaacs Creek
Location7.8 MI SW Union
RouteState Highway 481
CountyUnion County
StateSouth Carolina
Coordinates34.65017, -81.73758
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 protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJune 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation6: Equal to present minimum criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating61.8 US tons
Inventory rating31.1 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans4
Design loadH 15
Structure length120 ft (36.6 m)
Longest span30 ft (9.1 m)
Deck width35 ft (10.7 m)
Roadway width32 ft (9.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic275 (2023)
Projected traffic352 by 2043
Trucks3%
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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was S-44-481 over Isaacs Creek built?

It was built in 1980, making it 45 years old in 2025.

What condition is S-44-481 over Isaacs Creek 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 June 2023.

How much traffic does S-44-481 over Isaacs Creek carry?

About 275 vehicles per day (2023 count), of which roughly 3% are trucks.

How long is S-44-481 over Isaacs Creek?

The structure is 120 ft (36.6 m) long with a longest span of 30 ft (9.1 m) and a deck 35 ft wide.

Who owns S-44-481 over Isaacs Creek?

It is owned by the State Highway Agency.