US Bridges

NC147 Ramp over NC147

Fair

Durham County, North Carolina · 0.5 Mi.S.Lasalle Street · Structure no. 000000000630322

Built
1990
35 years old
Condition
Fair
inspected June 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
276 ft
4 main spans
Daily traffic
7,200
2021 count
Owner
State
State Highway Agency

About this bridge

NC147 Ramp over NC147 is a steel stringer/multi-beam or girder carrying NC147 Ramp over NC147 in Durham County, North Carolina. It was built in 1990, so it is 35 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 7,200 vehicles a day, roughly 12% of them trucks, projected to reach 14,400 by 2040. The structure is 276 ft (84.1 m) long and 35 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

Location

Open in Google Maps
CarriesNC147 Ramp
CrossesNC147
Location0.5 Mi.S.Lasalle Street
RouteState Highway 147
CountyDurham County
StateNorth Carolina
Coordinates36.00916, -78.93216
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.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJune 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to 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 rating99 US tons
Inventory rating61.9 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20 + Mod
Structure length276 ft (84.1 m)
Longest span89 ft (27.1 m)
Deck width35 ft (10.6 m)
Roadway width32 ft (9.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic7,200 (2021)
Projected traffic14,400 by 2040
Trucks12%
Lanes on structure2
Traffic directionOne-way traffic
CarriesOverpass structure at an interchange
CrossesHighway
Detour if closed0.6 mi (1 km)
TollOn a free road
National Highway SystemNo

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 Ramp over NC147 built?

It was built in 1990, making it 35 years old in 2025.

What condition is NC147 Ramp over NC147 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 2024.

How much traffic does NC147 Ramp over NC147 carry?

About 7,200 vehicles per day (2021 count), of which roughly 12% are trucks.

How long is NC147 Ramp over NC147?

The structure is 276 ft (84.1 m) long with a longest span of 89 ft (27.1 m) and a deck 35 ft wide.

Who owns NC147 Ramp over NC147?

It is owned by the State Highway Agency.