US Bridges

NC147N over Southern Railway

Good

Durham County, North Carolina · .34MI.N.JCT.SR1314 · Structure no. 000000000630344

Built
1996
29 years old
Condition
Good
inspected December 2021
Type
Stringer/Multi-beam or Girder
Steel
Length
189 ft
3 main spans
Daily traffic
11,500
2019 count
Owner
State
State Highway Agency

About this bridge

NC147N over Southern Railway is a steel stringer/multi-beam or girder carrying NC147N over Southern Railway in Durham 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 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 11,500 vehicles a day, roughly 12% of them trucks, projected to reach 23,000 by 2040. The structure is 189 ft (57.6 m) long and 41 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

Location

Open in Google Maps
CarriesNC147N
CrossesSouthern Railway
Location.34MI.N.JCT.SR1314
RouteState Highway 147
CountyDurham County
StateNorth Carolina
Coordinates36.02977, -78.96208
Functional classUrban Principal Arterial - Other Freeway or Expressway

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 inspectionDecember 2021
Inspection intervalevery 48 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 rating80.9 US tons
Inventory rating48 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans3 (+2 approach)
Design loadHS 20 + Mod
Structure length189 ft (57.6 m)
Longest span95 ft (28.9 m)
Deck width41 ft (12.4 m)
Roadway width38 ft (11.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic11,500 (2019)
Projected traffic23,000 by 2040
Trucks12%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesRailroad
Detour if closed0.6 mi (1 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 proposedNone recorded
Estimated improvement cost—
NavigationNot applicable (no waterway)

Frequently asked questions

When was NC147N over Southern Railway built?

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

What condition is NC147N over Southern Railway 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 December 2021.

How much traffic does NC147N over Southern Railway carry?

About 11,500 vehicles per day (2019 count), of which roughly 12% are trucks.

How long is NC147N over Southern Railway?

The structure is 189 ft (57.6 m) long with a longest span of 95 ft (28.9 m) and a deck 41 ft wide.

Who owns NC147N over Southern Railway?

It is owned by the State Highway Agency.