US Bridges

NC147S Ramp over US70

Fair

Durham County, North Carolina · 0.4MI.S.JCT.US70 · Structure no. 000000000630355

Built
1997
28 years old
Condition
Fair
inspected October 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
275 ft
3 main spans
Daily traffic
12,000
2022 count
Owner
State
State Highway Agency

About this bridge

NC147S Ramp over US70 is a steel stringer/multi-beam or girder carrying NC147S Ramp over US70 in Durham County, North Carolina. It was built in 1997, so it is 28 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 12,000 vehicles a day, roughly 12% of them trucks, projected to reach 24,000 by 2040. The structure is 275 ft (83.8 m) long and 40 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesNC147S Ramp
CrossesUS70
Location0.4MI.S.JCT.US70
RouteState Highway 147
CountyDurham County
StateNorth Carolina
Coordinates36.03354, -78.96664
Functional classUrban Principal Arterial - Other Freeway or Expressway

Condition and inspection

Fair

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

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Last inspectionOctober 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 rating93.9 US tons
Inventory rating56 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans3 (+2 approach)
Design loadHS 20 + Mod
Structure length275 ft (83.8 m)
Longest span118 ft (35.9 m)
Deck width40 ft (12.3 m)
Roadway width38 ft (11.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic12,000 (2022)
Projected traffic24,000 by 2040
Trucks12%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed1.9 mi (3 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 NC147S Ramp over US70 built?

It was built in 1997, making it 28 years old in 2025.

What condition is NC147S Ramp over US70 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 October 2023.

How much traffic does NC147S Ramp over US70 carry?

About 12,000 vehicles per day (2022 count), of which roughly 12% are trucks.

How long is NC147S Ramp over US70?

The structure is 275 ft (83.8 m) long with a longest span of 118 ft (35.9 m) and a deck 40 ft wide.

Who owns NC147S Ramp over US70?

It is owned by the State Highway Agency.