US Bridges

S-21-738 over Br-Lynches Lake

Fair

Florence County, South Carolina · 2MI S Johnsonville · Structure no. 000000000006666

Built
1975
50 years old, rebuilt 1997
Condition
Fair
inspected April 2023
Type
Slab
Concrete
Length
75 ft
5 main spans
Daily traffic
450
2023 count
Owner
State
State Highway Agency

About this bridge

S-21-738 over Br-Lynches Lake is a concrete slab carrying S-21-738 over Br-Lynches Lake in Florence County, South Carolina. It was built in 1975 and reconstructed in 1997, so it is 50 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 450 vehicles a day, roughly 5% of them trucks, projected to reach 576 by 2043. The structure is 75 ft (22.9 m) long and 28 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesS-21-738
CrossesBr-Lynches Lake
Location2MI S Johnsonville
RouteState Highway 738
CountyFlorence County
StateSouth Carolina
Coordinates33.78808, -79.46036
Functional classRural Local

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.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionApril 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourUnknown foundation; not evaluated for scour
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 alignment6: Equal to present minimum criteria
Operating rating30.8 US tons
Inventory rating18.2 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, precast panels
Main spans5
Design loadH 10
Structure length75 ft (22.9 m)
Longest span15 ft (4.6 m)
Deck width28 ft (8.4 m)
Roadway width26 ft (7.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic450 (2023)
Projected traffic576 by 2043
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 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 S-21-738 over Br-Lynches Lake built?

It was built in 1975, making it 50 years old in 2025. It was reconstructed in 1997.

What condition is S-21-738 over Br-Lynches Lake 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 April 2023.

How much traffic does S-21-738 over Br-Lynches Lake carry?

About 450 vehicles per day (2023 count), of which roughly 5% are trucks.

How long is S-21-738 over Br-Lynches Lake?

The structure is 75 ft (22.9 m) long with a longest span of 15 ft (4.6 m) and a deck 28 ft wide.

Who owns S-21-738 over Br-Lynches Lake?

It is owned by the State Highway Agency.