US Bridges

NC12 over Oregon Inlet

Good

Dare County, North Carolina · 10 Mi. S. Jct. US158 · Structure no. 000000000550072

Built
2019
6 years old
Condition
Good
inspected March 2023
Type
Segmental Box Girder
Prestressed Concrete
Length
14,800 ft
82 main spans
Daily traffic
5,900
2021 count
Owner
State
State Highway Agency

About this bridge

NC12 over Oregon Inlet is a prestressed concrete segmental box girder carrying NC12 over Oregon Inlet in Dare County, North Carolina. It was built in 2019, so it is 6 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 5,900 vehicles a day, roughly 7% of them trucks, projected to reach 11,800 by 2040. The structure is 14,800 ft (4,510.9 m) long and 54 ft wide. If it were closed, the detour would be 98.8 mi (159 km).

Location

Open in Google Maps
CarriesNC12
CrossesOregon Inlet
Location10 Mi. S. Jct. US158
RouteState Highway 12
CountyDare County
StateNorth Carolina
Coordinates35.77762, -75.54364
Functional classRural Major Collector

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.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionMarch 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry*: *
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating61 US tons
Inventory rating49.9 US tons

Structure

Structure typeSegmental Box Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans82
Design loadHL 93
Structure length14,800 ft (4,510.9 m)
Longest span350 ft (106.6 m)
Deck width54 ft (16.6 m)
Roadway width40 ft (12.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic5,900 (2021)
Projected traffic11,800 by 2040
Trucks7%
Lanes on structure—
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed98.8 mi (159 km)
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost—
NavigationNavigation control on waterway (bridge permit required)

Frequently asked questions

When was NC12 over Oregon Inlet built?

It was built in 2019, making it 6 years old in 2025.

What condition is NC12 over Oregon Inlet 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 March 2023.

How much traffic does NC12 over Oregon Inlet carry?

About 5,900 vehicles per day (2021 count), of which roughly 7% are trucks.

How long is NC12 over Oregon Inlet?

The structure is 14,800 ft (4,510.9 m) long with a longest span of 350 ft (106.6 m) and a deck 54 ft wide.

Who owns NC12 over Oregon Inlet?

It is owned by the State Highway Agency.