US Bridges

NC147 Nbl over Creek

Fair

Durham County, North Carolina · 0.1 MI.N.JCT.SR1121 · Structure no. 000000000630205

Built
1973
52 years old
Condition
Fair
inspected July 2023
Type
Culvert
Concrete Continuous
Length
25 ft
2 main spans
Daily traffic
27,000
2020 count
Owner
State
State Highway Agency

About this bridge

NC147 Nbl over Creek is a concrete continuous culvert carrying NC147 Nbl over Creek 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 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 27,000 vehicles a day, roughly 16% of them trucks, projected to reach 54,000 by 2040. The structure is 25 ft (7.6 m) long. If it were closed, the detour would be 2.5 mi (4 km).

Location

Open in Google Maps
CarriesNC147 Nbl
CrossesCreek
Location0.1 MI.N.JCT.SR1121
RouteState Highway 147
CountyDurham County
StateNorth Carolina
Coordinates35.91243, -78.86441
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
Channel and channel protection7 GoodSome minor problems.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJuly 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating99 US tons
Inventory rating86 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckNot applicable
Main spans2
Design loadHS 20 + Mod
Structure length25 ft (7.6 m)
Longest span6 ft (1.8 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic27,000 (2020)
Projected traffic54,000 by 2040
Trucks16%
Lanes on structure3
Traffic directionOne-way traffic
CarriesHighway
CrossesWaterway
Detour if closed2.5 mi (4 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—
NavigationNo navigation control on waterway

Frequently asked questions

When was NC147 Nbl over Creek built?

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

What condition is NC147 Nbl over Creek 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 July 2023.

How much traffic does NC147 Nbl over Creek carry?

About 27,000 vehicles per day (2020 count), of which roughly 16% are trucks.

How long is NC147 Nbl over Creek?

The structure is 25 ft (7.6 m) long with a longest span of 6 ft (1.8 m).

Who owns NC147 Nbl over Creek?

It is owned by the State Highway Agency.