US Bridges

US 15 over Mcintosh Mill Stream

Fair

Darlington County, South Carolina · 5MI NE of Hartsville · Structure no. 000000000000519

Built
1931
94 years old, rebuilt 1962
Condition
Fair
inspected January 2024
Type
Tee Beam
Concrete
Length
100 ft
4 main spans
Daily traffic
3,000
2023 count
Owner
State
State Highway Agency

About this bridge

US 15 over Mcintosh Mill Stream is a concrete tee beam carrying US 15 over Mcintosh Mill Stream in Darlington County, South Carolina. It was built in 1931 and reconstructed in 1962, so it is 94 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 3,000 vehicles a day, roughly 17% of them trucks, projected to reach 4,770 by 2043. The structure is 100 ft (30.5 m) long and 40 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesUS 15
CrossesMcintosh Mill Stream
Location5MI NE of Hartsville
RouteU.S. Route 15
CountyDarlington County
StateSouth Carolina
Coordinates34.41378, -79.98909
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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJanuary 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating50.7 US tons
Inventory rating30.3 US tons

Structure

Structure typeTee Beam
MaterialConcrete
DeckConcrete, cast-in-place
Main spans4
Design loadH 15
Structure length100 ft (30.5 m)
Longest span25 ft (7.6 m)
Deck width40 ft (12.2 m)
Roadway width36 ft (11 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,000 (2023)
Projected traffic4,770 by 2043
Trucks17%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 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 US 15 over Mcintosh Mill Stream built?

It was built in 1931, making it 94 years old in 2025. It was reconstructed in 1962.

What condition is US 15 over Mcintosh Mill Stream 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 January 2024.

How much traffic does US 15 over Mcintosh Mill Stream carry?

About 3,000 vehicles per day (2023 count), of which roughly 17% are trucks.

How long is US 15 over Mcintosh Mill Stream?

The structure is 100 ft (30.5 m) long with a longest span of 25 ft (7.6 m) and a deck 40 ft wide.

Who owns US 15 over Mcintosh Mill Stream?

It is owned by the State Highway Agency.