US Bridges

US 76 over Bay Branch

Fair

Florence County, South Carolina · 3MI SW of Timmonsville · Structure no. 000000000000681

Built
1935
90 years old, rebuilt 1959
Condition
Fair
inspected March 2024
Type
Tee Beam
Concrete
Length
75 ft
3 main spans
Daily traffic
2,300
2023 count
Owner
State
State Highway Agency

About this bridge

US 76 over Bay Branch is a concrete tee beam carrying US 76 over Bay Branch in Florence County, South Carolina. It was built in 1935 and reconstructed in 1959, so it is 90 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 2,300 vehicles a day, roughly 7% of them trucks, projected to reach 1,771 by 2043. The structure is 75 ft (22.9 m) long and 41 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesUS 76
CrossesBay Branch
Location3MI SW of Timmonsville
RouteU.S. Route 76
CountyFlorence County
StateSouth Carolina
Coordinates34.11191, -79.98197
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 inspectionMarch 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation4: Meets minimum tolerable limits to be 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 rating27.1 US tons
Inventory rating16.1 US tons

Structure

Structure typeTee Beam
MaterialConcrete
DeckConcrete, cast-in-place
Main spans3
Design loadH 20
Structure length75 ft (22.9 m)
Longest span25 ft (7.6 m)
Deck width41 ft (12.6 m)
Roadway width36 ft (11 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,300 (2023)
Projected traffic1,771 by 2043
Trucks7%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
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 proposedWidening with deck rehabilitation or replacement
Estimated improvement cost$110,000 (2024 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was US 76 over Bay Branch built?

It was built in 1935, making it 90 years old in 2025. It was reconstructed in 1959.

What condition is US 76 over Bay 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 76 over Bay Branch carry?

About 2,300 vehicles per day (2023 count), of which roughly 7% are trucks.

How long is US 76 over Bay Branch?

The structure is 75 ft (22.9 m) long with a longest span of 25 ft (7.6 m) and a deck 41 ft wide.

Who owns US 76 over Bay Branch?

It is owned by the State Highway Agency.