US Bridges

US 301 over Cypress Branch

Fair

Florence County, South Carolina · Town of Olanta · Structure no. 000000000000182

Built
1925
100 years old, rebuilt 1952
Condition
Fair
inspected March 2024
Type
Culvert
Concrete
Length
34 ft
3 main spans
Daily traffic
2,000
2023 count
Owner
State
State Highway Agency

About this bridge

US 301 over Cypress Branch is a concrete culvert carrying US 301 over Cypress Branch in Florence County, South Carolina. It was built in 1925 and reconstructed in 1952, so it is 100 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 2,000 vehicles a day, roughly 12% of them trucks, projected to reach 2,920 by 2043. The structure is 34 ft (10.4 m) long and 54 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

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CarriesUS 301
CrossesCypress Branch
LocationTown of Olanta
RouteU.S. Route 301
CountyFlorence County
StateSouth Carolina
Coordinates33.93531, -79.93673
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
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMarch 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating47.2 US tons
Inventory rating28.2 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans3
Design loadH 15
Structure length34 ft (10.4 m)
Longest span10 ft (3 m)
Deck width54 ft (16.5 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,000 (2023)
Projected traffic2,920 by 2043
Trucks12%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed3.7 mi (6 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$39,000 (2024 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was US 301 over Cypress Branch built?

It was built in 1925, making it 100 years old in 2025. It was reconstructed in 1952.

What condition is US 301 over Cypress Branch 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 301 over Cypress Branch carry?

About 2,000 vehicles per day (2023 count), of which roughly 12% are trucks.

How long is US 301 over Cypress Branch?

The structure is 34 ft (10.4 m) long with a longest span of 10 ft (3 m) and a deck 54 ft wide.

Who owns US 301 over Cypress Branch?

It is owned by the State Highway Agency.