US Bridges

US 601 over Mill Creek

Fair

Calhoun County, South Carolina · In Town of ST Matthews · Structure no. 000000000000643

Built
1934
91 years old, rebuilt 1961
Condition
Fair
inspected July 2024
Type
Culvert
Concrete
Length
21 ft
2 main spans
Daily traffic
3,100
2023 count
Owner
State
State Highway Agency

About this bridge

US 601 over Mill Creek is a concrete culvert carrying US 601 over Mill Creek in Calhoun County, South Carolina. It was built in 1934 and reconstructed in 1961, so it is 91 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 3,100 vehicles a day, roughly 20% of them trucks, projected to reach 5,394 by 2043. The structure is 21 ft (6.3 m) long and 86 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesUS 601
CrossesMill Creek
LocationIn Town of ST Matthews
RouteU.S. Route 601
Coordinates33.67079, -80.77149
Functional classRural Principal Arterial - Other

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Channel and channel protection7 GoodSome minor problems.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJuly 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating42.9 US tons
Inventory rating25.7 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans2
Design loadH 15
Structure length21 ft (6.3 m)
Longest span10 ft (3 m)
Deck width86 ft (26.2 m)
Roadway width32 ft (9.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,100 (2023)
Projected traffic5,394 by 2043
Trucks20%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was US 601 over Mill Creek built?

It was built in 1934, making it 91 years old in 2025. It was reconstructed in 1961.

What condition is US 601 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 July 2024.

How much traffic does US 601 over Mill Creek carry?

About 3,100 vehicles per day (2023 count), of which roughly 20% are trucks.

How long is US 601 over Mill Creek?

The structure is 21 ft (6.3 m) long with a longest span of 10 ft (3 m) and a deck 86 ft wide.

Who owns US 601 over Mill Creek?

It is owned by the State Highway Agency.