US Bridges

NC147 Nbl over Campus Drive

Fair

Durham County, North Carolina · 0.4 Mi.S. of JCT.SR1320 · Structure no. 000000000630140

Built
1974
51 years old
Condition
Fair
inspected April 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
112 ft
3 main spans
Daily traffic
53,000
2020 count
Owner
State
State Highway Agency

About this bridge

NC147 Nbl over Campus Drive is a steel continuous stringer/multi-beam or girder carrying NC147 Nbl over Campus Drive in Durham County, North Carolina. It was built in 1974, so it is 51 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 53,000 vehicles a day, roughly 12% of them trucks, projected to reach 106,000 by 2040. The structure is 112 ft (34.1 m) long and 54 ft wide.

Location

Open in Google Maps
CarriesNC147 Nbl
CrossesCampus Drive
Location0.4 Mi.S. of JCT.SR1320
RouteState Highway 147
CountyDurham County
StateNorth Carolina
Coordinates36.00232, -78.91784
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionApril 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Approach roadway alignment8: Equal to present desirable criteria
Operating rating62.9 US tons
Inventory rating36.9 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20 + Mod
Structure length112 ft (34.1 m)
Longest span49 ft (14.9 m)
Deck width54 ft (16.5 m)
Roadway width45 ft (13.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic53,000 (2020)
Projected traffic106,000 by 2040
Trucks12%
Lanes on structure3
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 NC147 Nbl over Campus Drive built?

It was built in 1974, making it 51 years old in 2025.

What condition is NC147 Nbl over Campus Drive 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 April 2023.

How much traffic does NC147 Nbl over Campus Drive carry?

About 53,000 vehicles per day (2020 count), of which roughly 12% are trucks.

How long is NC147 Nbl over Campus Drive?

The structure is 112 ft (34.1 m) long with a longest span of 49 ft (14.9 m) and a deck 54 ft wide.

Who owns NC147 Nbl over Campus Drive?

It is owned by the State Highway Agency.