US Bridges

S-21-45 over I-95

Fair

Florence County, South Carolina · 3 MI E Timmonsville · Structure no. 000000000005054

Built
1967
58 years old
Condition
Fair
inspected April 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
302 ft
5 main spans
Daily traffic
1,500
2023 count
Owner
State
State Highway Agency

About this bridge

S-21-45 over I-95 is a prestressed concrete stringer/multi-beam or girder carrying S-21-45 over I-95 in Florence County, South Carolina. It was built in 1967, so it is 58 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 1,500 vehicles a day, roughly 10% of them trucks, projected to reach 1,890 by 2043. The structure is 302 ft (92 m) long and 30 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesS-21-45
CrossesI-95
Location3 MI E Timmonsville
RouteState Highway 45
CountyFlorence County
StateSouth Carolina
Coordinates34.12389, -79.89714
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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionApril 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating57.1 US tons
Inventory rating33.6 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans5
Design loadHS 15
Structure length302 ft (92 m)
Longest span66 ft (20.1 m)
Deck width30 ft (9.2 m)
Roadway width26 ft (7.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,500 (2023)
Projected traffic1,890 by 2043
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
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—
NavigationNot applicable (no waterway)

Frequently asked questions

When was S-21-45 over I-95 built?

It was built in 1967, making it 58 years old in 2025.

What condition is S-21-45 over I-95 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-21-45 over I-95 carry?

About 1,500 vehicles per day (2023 count), of which roughly 10% are trucks.

How long is S-21-45 over I-95?

The structure is 302 ft (92 m) long with a longest span of 66 ft (20.1 m) and a deck 30 ft wide.

Who owns S-21-45 over I-95?

It is owned by the State Highway Agency.