US Bridges

US 15 over RR to Willamette

Fair

Marlboro County, South Carolina · 4.5MI SW Bennetsville · Structure no. 000000000008285

Built
1989
36 years old
Condition
Fair
inspected March 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
200 ft
3 main spans
Daily traffic
4,300
2023 count
Owner
State
State Highway Agency

About this bridge

US 15 over RR to Willamette is a steel continuous stringer/multi-beam or girder carrying US 15 over RR to Willamette in Marlboro County, South Carolina. It was built in 1989, so it is 36 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 4,300 vehicles a day, roughly 17% of them trucks, projected to reach 6,837 by 2043. The structure is 200 ft (61 m) long and 47 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesUS 15
CrossesRR to Willamette
Location4.5MI SW Bennetsville
RouteU.S. Route 15
CountyMarlboro County
StateSouth Carolina
Coordinates34.58668, -79.75458
Functional classRural 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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Last inspectionMarch 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating50.4 US tons
Inventory rating38.9 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length200 ft (61 m)
Longest span76 ft (23.2 m)
Deck width47 ft (14.3 m)
Roadway width44 ft (13.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,300 (2023)
Projected traffic6,837 by 2043
Trucks17%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesRailroad
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 statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNot applicable (no waterway)

Frequently asked questions

When was US 15 over RR to Willamette built?

It was built in 1989, making it 36 years old in 2025.

What condition is US 15 over RR to Willamette 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 US 15 over RR to Willamette carry?

About 4,300 vehicles per day (2023 count), of which roughly 17% are trucks.

How long is US 15 over RR to Willamette?

The structure is 200 ft (61 m) long with a longest span of 76 ft (23.2 m) and a deck 47 ft wide.

Who owns US 15 over RR to Willamette?

It is owned by the State Highway Agency.