US Bridges

S-40-57 over Harmon Creek

Fair

Richland County, South Carolina · 10MI NW Columbia · Structure no. 000000000002828

Built
1958
67 years old
Condition
Fair
inspected December 2024
Type
Slab
Concrete
Length
75 ft
5 main spans
Daily traffic
425
2023 count
Owner
State
State Highway Agency

About this bridge

S-40-57 over Harmon Creek is a concrete slab carrying S-40-57 over Harmon Creek in Richland County, South Carolina. It was built in 1958, so it is 67 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 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 425 vehicles a day, roughly 8% of them trucks, projected to reach 825 by 2043. The structure is 75 ft (22.9 m) long and 28 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesS-40-57
CrossesHarmon Creek
Location10MI NW Columbia
RouteState Highway 57
CountyRichland County
StateSouth Carolina
Coordinates34.166, -81.10158
Functional classRural Major Collector

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 inspectionDecember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation4: Meets minimum tolerable limits to be 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 rating29.7 US tons
Inventory rating17.5 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, precast panels
Main spans5
Design loadH 10
Structure length75 ft (22.9 m)
Longest span15 ft (4.6 m)
Deck width28 ft (8.4 m)
Roadway width26 ft (7.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic425 (2023)
Projected traffic825 by 2043
Trucks8%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 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 proposedWidening with deck rehabilitation or replacement
Estimated improvement cost$237,000 (2024 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was S-40-57 over Harmon Creek built?

It was built in 1958, making it 67 years old in 2025.

What condition is S-40-57 over Harmon 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 December 2024.

How much traffic does S-40-57 over Harmon Creek carry?

About 425 vehicles per day (2023 count), of which roughly 8% are trucks.

How long is S-40-57 over Harmon Creek?

The structure is 75 ft (22.9 m) long with a longest span of 15 ft (4.6 m) and a deck 28 ft wide.

Who owns S-40-57 over Harmon Creek?

It is owned by the State Highway Agency.