US Bridges

I74WBL US311NBL over I85BUS US29 US70 Coll

Good

Guilford County, North Carolina · 1.5 Mi. S. Jct. SR1113 · Structure no. 000000000810859

Built
2005
20 years old
Condition
Good
inspected October 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
519 ft
4 main spans
Daily traffic
10,750
2020 count
Owner
State
State Highway Agency

About this bridge

I74WBL US311NBL over I85BUS US29 US70 Coll is a steel continuous stringer/multi-beam or girder carrying I74WBL US311NBL over I85BUS US29 US70 Coll in Guilford County, North Carolina. It was built in 2005, so it is 20 years old, younger than the North Carolina average of 38.7 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 10,750 vehicles a day, roughly 16% of them trucks, projected to reach 21,500 by 2040. The structure is 519 ft (158.1 m) long and 41 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

CarriesI74WBL US311NBL
CrossesI85BUS US29 US70 Coll
Location1.5 Mi. S. Jct. SR1113
RouteInterstate 74
Coordinates35.94559, -79.97218
Functional classUrban Principal Arterial - Interstate

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 inspectionOctober 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating76.9 US tons
Inventory rating46 US tons

Structure

MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans4 (+2 approach)
Design loadHS 20 + Mod
Structure length519 ft (158.1 m)
Longest span147 ft (44.8 m)
Deck width41 ft (12.5 m)
Roadway width38 ft (11.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic10,750 (2020)
Projected traffic21,500 by 2040
Trucks16%
Lanes on structure2
Traffic directionOne-way traffic
CarriesOverpass structure at an interchange
CrossesHighway
Detour if closed0.6 mi (1 km)
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkInterstate STRAHNET route

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 I74WBL US311NBL over I85BUS US29 US70 Coll built?

It was built in 2005, making it 20 years old in 2025.

What condition is I74WBL US311NBL over I85BUS US29 US70 Coll 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 October 2023.

How much traffic does I74WBL US311NBL over I85BUS US29 US70 Coll carry?

About 10,750 vehicles per day (2020 count), of which roughly 16% are trucks.

How long is I74WBL US311NBL over I85BUS US29 US70 Coll?

The structure is 519 ft (158.1 m) long with a longest span of 147 ft (44.8 m) and a deck 41 ft wide.

Who owns I74WBL US311NBL over I85BUS US29 US70 Coll?

It is owned by the State Highway Agency.