US Bridges

L-40-170 over RR Csxt/Rr NS

Good

Richland County, South Carolina · City of Columbia · Structure no. 000000000009361

Built
1998
27 years old
Condition
Good
inspected February 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
200 ft
3 main spans
Daily traffic
4,700
2023 count
Owner
City
City or Municipal Highway Agency

About this bridge

L-40-170 over RR Csxt/Rr NS is a steel stringer/multi-beam or girder carrying L-40-170 over RR Csxt/Rr NS in Richland County, South Carolina. It was built in 1998, so it is 27 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 4,700 vehicles a day, roughly 2% of them trucks, projected to reach 6,016 by 2043. The structure is 200 ft (61 m) long and 66 ft wide.

Location

Open in Google Maps
CarriesL-40-170
CrossesRR Csxt/Rr NS
LocationCity of Columbia
RouteCounty Highway 170
CountyRichland County
StateSouth Carolina
Coordinates33.99999, -81.04261
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
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Last inspectionFebruary 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry2: Basically intolerable, requiring high priority of replacement
Approach roadway alignment8: Equal to present desirable criteria
Operating rating53.6 US tons
Inventory rating41.4 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans3
Design loadHS 25 or greater
Structure length200 ft (61 m)
Longest span83 ft (25.3 m)
Deck width66 ft (20.1 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,700 (2023)
Projected traffic6,016 by 2043
Trucks2%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesRailroad
Detour if closed—
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedWidening with deck rehabilitation or replacement
Estimated improvement cost$618,000 (2024 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was L-40-170 over RR Csxt/Rr NS built?

It was built in 1998, making it 27 years old in 2025.

What condition is L-40-170 over RR Csxt/Rr NS 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 February 2023.

How much traffic does L-40-170 over RR Csxt/Rr NS carry?

About 4,700 vehicles per day (2023 count), of which roughly 2% are trucks.

How long is L-40-170 over RR Csxt/Rr NS?

The structure is 200 ft (61 m) long with a longest span of 83 ft (25.3 m) and a deck 66 ft wide.

Who owns L-40-170 over RR Csxt/Rr NS?

It is owned by the City or Municipal Highway Agency.