US Bridges

US 301 Con over Mill Creek

Fair

Clarendon County, South Carolina · .25 MI N of Alcolu · Structure no. 000000000000018

Built
1922
103 years old, rebuilt 1968
Condition
Fair
inspected October 2023
Type
Tee Beam
Concrete
Length
44 ft
2 main spans
Daily traffic
200
2023 count
Owner
State
State Highway Agency

About this bridge

US 301 Con over Mill Creek is a concrete tee beam carrying US 301 Con over Mill Creek in Clarendon County, South Carolina. It was built in 1922 and reconstructed in 1968, so it is 103 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 200 vehicles a day, roughly 14% of them trucks, projected to reach 292 by 2043. The structure is 44 ft (13.4 m) long and 40 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesUS 301 Con
CrossesMill Creek
Location.25 MI N of Alcolu
RouteU.S. Route 301
Coordinates33.75188, -80.22082
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.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionOctober 2023
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 geometry7: Better than present minimum criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating30.8 US tons
Inventory rating18.2 US tons

Structure

Structure typeTee Beam
MaterialConcrete
DeckConcrete, cast-in-place
Main spans2
Design loadH 15
Structure length44 ft (13.4 m)
Longest span22 ft (6.7 m)
Deck width40 ft (12.1 m)
Roadway width36 ft (11 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic200 (2023)
Projected traffic292 by 2043
Trucks14%
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 301 Con over Mill Creek built?

It was built in 1922, making it 103 years old in 2025. It was reconstructed in 1968.

What condition is US 301 Con over Mill 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 October 2023.

How much traffic does US 301 Con over Mill Creek carry?

About 200 vehicles per day (2023 count), of which roughly 14% are trucks.

How long is US 301 Con over Mill Creek?

The structure is 44 ft (13.4 m) long with a longest span of 22 ft (6.7 m) and a deck 40 ft wide.

Who owns US 301 Con over Mill Creek?

It is owned by the State Highway Agency.