US Bridges

SR1979 over I74 US311

Fair

Guilford County, North Carolina · 1.45 Mi. E. Jct. SR1009 · Structure no. 000000000810761

Built
1996
29 years old
Condition
Fair
inspected August 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
252 ft
4 main spans
Daily traffic
15,500
2022 count
Owner
State
State Highway Agency

About this bridge

SR1979 over I74 US311 is a prestressed concrete stringer/multi-beam or girder carrying SR1979 over I74 US311 in Guilford County, North Carolina. It was built in 1996, so it is 29 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 fair condition with a lowest component rating of 6 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 15,500 vehicles a day, roughly 6% of them trucks, projected to reach 31,000 by 2040. The structure is 252 ft (76.8 m) long and 74 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

CarriesSR1979
CrossesI74 US311
Location1.45 Mi. E. Jct. SR1009
RouteCity Street 0
Coordinates36.00927, -80.01005
Functional classUrban Minor Arterial

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionAugust 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating99 US tons
Inventory rating58 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20 + Mod
Structure length252 ft (76.8 m)
Longest span75 ft (22.8 m)
Deck width74 ft (22.7 m)
Roadway width64 ft (19.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic15,500 (2022)
Projected traffic31,000 by 2040
Trucks6%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesOverpass structure at an interchange
CrossesHighway
Detour if closed0.6 mi (1 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—
NavigationNot applicable (no waterway)

Frequently asked questions

When was SR1979 over I74 US311 built?

It was built in 1996, making it 29 years old in 2025.

What condition is SR1979 over I74 US311 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 August 2024.

How much traffic does SR1979 over I74 US311 carry?

About 15,500 vehicles per day (2022 count), of which roughly 6% are trucks.

How long is SR1979 over I74 US311?

The structure is 252 ft (76.8 m) long with a longest span of 75 ft (22.8 m) and a deck 74 ft wide.

Who owns SR1979 over I74 US311?

It is owned by the State Highway Agency.