US Bridges

S-29-71 over Trib to Bear Creek

Fair

Lancaster County, South Carolina · 5.2MI SE Lancaster · Structure no. 000000000000198

Built
1925
100 years old
Condition
Fair
inspected July 2023
Type
Tee Beam
Concrete
Length
43 ft
1 main span
Daily traffic
500
2023 count
Owner
State
State Highway Agency

About this bridge

S-29-71 over Trib to Bear Creek is a concrete tee beam carrying S-29-71 over Trib to Bear Creek in Lancaster County, South Carolina. It was built in 1925, 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 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 500 vehicles a day, roughly 9% of them trucks, projected to reach 730 by 2043. The structure is 43 ft (13.1 m) long and 21 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesS-29-71
CrossesTrib to Bear Creek
Location5.2MI SE Lancaster
RouteState Highway 71
CountyLancaster County
StateSouth Carolina
Coordinates34.66344, -80.70371
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.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJuly 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating39.2 US tons
Inventory rating30.3 US tons

Structure

Structure typeTee Beam
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadH 15
Structure length43 ft (13.1 m)
Longest span43 ft (13.1 m)
Deck width21 ft (6.5 m)
Roadway width18 ft (5.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic500 (2023)
Projected traffic730 by 2043
Trucks9%
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 proposedWidening with deck rehabilitation or replacement
Estimated improvement cost$186,000 (2024 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was S-29-71 over Trib to Bear Creek built?

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

What condition is S-29-71 over Trib to Bear Creek 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 July 2023.

How much traffic does S-29-71 over Trib to Bear Creek carry?

About 500 vehicles per day (2023 count), of which roughly 9% are trucks.

How long is S-29-71 over Trib to Bear Creek?

The structure is 43 ft (13.1 m) long with a longest span of 43 ft (13.1 m) and a deck 21 ft wide.

Who owns S-29-71 over Trib to Bear Creek?

It is owned by the State Highway Agency.