US Bridges

NC66 over I74 US311

Fair

Forsyth County, North Carolina · 0.3 MI.N.JCT.SR2617 · Structure no. 000000000670019

Built
1979
46 years old
Condition
Fair
inspected September 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
246 ft
2 main spans
Daily traffic
13,000
2021 count
Owner
State
State Highway Agency

About this bridge

NC66 over I74 US311 is a steel stringer/multi-beam or girder carrying NC66 over I74 US311 in Forsyth County, North Carolina. It was built in 1979, so it is 46 years old, older 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 13,000 vehicles a day, roughly 8% of them trucks, projected to reach 26,000 by 2040. The structure is 246 ft (74.9 m) long and 71 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

Open in Google Maps
CarriesNC66
CrossesI74 US311
Location0.3 MI.N.JCT.SR2617
RouteState Highway 66
CountyForsyth County
StateNorth Carolina
Coordinates36.0264, -80.05839
Functional classRural 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 inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating99 US tons
Inventory rating74 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20 + Mod
Structure length246 ft (74.9 m)
Longest span128 ft (39 m)
Deck width71 ft (21.6 m)
Roadway width68 ft (20.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic13,000 (2021)
Projected traffic26,000 by 2040
Trucks8%
Lanes on structure3
Traffic directionTwo-way traffic
CarriesOverpass structure at an interchange
CrossesHighway
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 proposedNone recorded
Estimated improvement cost—
NavigationNot applicable (no waterway)

Frequently asked questions

When was NC66 over I74 US311 built?

It was built in 1979, making it 46 years old in 2025.

What condition is NC66 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 September 2023.

How much traffic does NC66 over I74 US311 carry?

About 13,000 vehicles per day (2021 count), of which roughly 8% are trucks.

How long is NC66 over I74 US311?

The structure is 246 ft (74.9 m) long with a longest span of 128 ft (39 m) and a deck 71 ft wide.

Who owns NC66 over I74 US311?

It is owned by the State Highway Agency.