US Bridges

S-29-28 over Unnamed

Fair

Lancaster County, South Carolina · 11.5MI NE Lancaster · Structure no. 000000000000191

Built
1925
100 years old
Condition
Fair
inspected July 2024
Type
Tee Beam
Concrete
Length
41 ft
1 main span
Daily traffic
800
2023 count
Owner
State
State Highway Agency

About this bridge

S-29-28 over Unnamed is a concrete tee beam carrying S-29-28 over Unnamed 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 800 vehicles a day, roughly 11% of them trucks, projected to reach 1,168 by 2024. The structure is 41 ft (12.5 m) long and 21 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

Open in Google Maps
CarriesS-29-28
CrossesUnnamed
Location11.5MI NE Lancaster
RouteState Highway 28
CountyLancaster County
StateSouth Carolina
Coordinates34.79556, -80.59333
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.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJuly 2024
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 adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating66.8 US tons
Inventory rating40 US tons

Structure

Structure typeTee Beam
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadH 10
Structure length41 ft (12.5 m)
Longest span41 ft (12.5 m)
Deck width21 ft (6.4 m)
Roadway width18 ft (5.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic800 (2023)
Projected traffic1,168 by 2024
Trucks11%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed5 mi (8 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$179,000 (2024 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was S-29-28 over Unnamed built?

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

What condition is S-29-28 over Unnamed 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 2024.

How much traffic does S-29-28 over Unnamed carry?

About 800 vehicles per day (2023 count), of which roughly 11% are trucks.

How long is S-29-28 over Unnamed?

The structure is 41 ft (12.5 m) long with a longest span of 41 ft (12.5 m) and a deck 21 ft wide.

Who owns S-29-28 over Unnamed?

It is owned by the State Highway Agency.