US Bridges

S-40-1122 over Trib to Smith Branch

Good

Richland County, South Carolina · 3 MI NE of Columbia · Structure no. 000000000008095

Built
1987
38 years old
Condition
Good
inspected December 2024
Type
Slab
Prestressed Concrete
Length
30 ft
1 main span
Daily traffic
225
2023 count
Owner
State
State Highway Agency

About this bridge

S-40-1122 over Trib to Smith Branch is a prestressed concrete slab carrying S-40-1122 over Trib to Smith Branch in Richland County, South Carolina. It was built in 1987, so it is 38 years old, younger than the South Carolina average of 48 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 225 vehicles a day, roughly 5% of them trucks, projected to reach 288 by 2043. The structure is 30 ft (9.1 m) long and 37 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesS-40-1122
CrossesTrib to Smith Branch
Location3 MI NE of Columbia
RouteState Highway 1122
CountyRichland County
StateSouth Carolina
Coordinates34.03778, -81.02406
Functional classUrban Local

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionDecember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating94.7 US tons
Inventory rating44.3 US tons

Structure

Structure typeSlab
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length30 ft (9.1 m)
Longest span30 ft (9.1 m)
Deck width37 ft (11.2 m)
Roadway width34 ft (10.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic225 (2023)
Projected traffic288 by 2043
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 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-40-1122 over Trib to Smith Branch built?

It was built in 1987, making it 38 years old in 2025.

What condition is S-40-1122 over Trib to Smith Branch in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in December 2024.

How much traffic does S-40-1122 over Trib to Smith Branch carry?

About 225 vehicles per day (2023 count), of which roughly 5% are trucks.

How long is S-40-1122 over Trib to Smith Branch?

The structure is 30 ft (9.1 m) long with a longest span of 30 ft (9.1 m) and a deck 37 ft wide.

Who owns S-40-1122 over Trib to Smith Branch?

It is owned by the State Highway Agency.