US Bridges

S-21-150 over Trib to Lynches Rv

Fair

Florence County, South Carolina · 4MI NW Prospect · Structure no. 000000000002952

Built
1959
66 years old, rebuilt 2002
Condition
Fair
inspected April 2023
Type
Slab
Concrete
Length
30 ft
2 main spans
Daily traffic
250
2023 count
Owner
State
State Highway Agency

About this bridge

S-21-150 over Trib to Lynches Rv is a concrete slab carrying S-21-150 over Trib to Lynches Rv in Florence County, South Carolina. It was built in 1959 and reconstructed in 2002, so it is 66 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 250 vehicles a day, roughly 5% of them trucks, projected to reach 320 by 2043. The structure is 30 ft (9.1 m) long and 28 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

CarriesS-21-150
CrossesTrib to Lynches Rv
Location4MI NW Prospect
RouteState Highway 150
Coordinates33.86771, -79.61637
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 protection8 Very GoodNo problems noted.
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 adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating34 US tons
Inventory rating20.4 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, precast panels
Main spans2
Design loadH 10
Structure length30 ft (9.1 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 traffic250 (2023)
Projected traffic320 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-21-150 over Trib to Lynches Rv built?

It was built in 1959, making it 66 years old in 2025. It was reconstructed in 2002.

What condition is S-21-150 over Trib to Lynches Rv 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-21-150 over Trib to Lynches Rv carry?

About 250 vehicles per day (2023 count), of which roughly 5% are trucks.

How long is S-21-150 over Trib to Lynches Rv?

The structure is 30 ft (9.1 m) long with a longest span of 15 ft (4.6 m) and a deck 28 ft wide.

Who owns S-21-150 over Trib to Lynches Rv?

It is owned by the State Highway Agency.