US Bridges

I40E.RAMP over NC147N.

Fair

Durham County, North Carolina · 0.5 MI.S.JCT.SR1121 · Structure no. 000000000630212

Built
1973
52 years old
Condition
Fair
inspected June 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
295 ft
3 main spans
Daily traffic
58,000
2019 count
Owner
State
State Highway Agency

About this bridge

I40E.RAMP over NC147N. is a steel stringer/multi-beam or girder carrying I40E.RAMP over NC147N. in Durham County, North Carolina. It was built in 1973, so it is 52 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 5 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 58,000 vehicles a day, roughly 16% of them trucks, projected to reach 116,000 by 2040. The structure is 295 ft (89.9 m) long and 42 ft wide.

Location

Open in Google Maps
CarriesI40E.RAMP
CrossesNC147N.
Location0.5 MI.S.JCT.SR1121
RouteInterstate 40
CountyDurham County
StateNorth Carolina
Coordinates35.90351, -78.87207
Functional classUrban Principal Arterial - Interstate

Condition and inspection

Fair

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

ComponentRatingMeaning
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionJune 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating99 US tons
Inventory rating65.9 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20 + Mod
Structure length295 ft (89.9 m)
Longest span121 ft (36.8 m)
Deck width42 ft (12.8 m)
Roadway width40 ft (12.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic58,000 (2019)
Projected traffic116,000 by 2040
Trucks16%
Lanes on structure2
Traffic directionOne-way traffic
CarriesOverpass structure at an interchange
CrossesHighway
Detour if closed—
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 I40E.RAMP over NC147N. built?

It was built in 1973, making it 52 years old in 2025.

What condition is I40E.RAMP over NC147N. 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 June 2023.

How much traffic does I40E.RAMP over NC147N. carry?

About 58,000 vehicles per day (2019 count), of which roughly 16% are trucks.

How long is I40E.RAMP over NC147N.?

The structure is 295 ft (89.9 m) long with a longest span of 121 ft (36.8 m) and a deck 42 ft wide.

Who owns I40E.RAMP over NC147N.?

It is owned by the State Highway Agency.