US Bridges

NC147S over SR1321

Fair

Durham County, North Carolina · 0.8 Mi. S. Jct. US15/501 · Structure no. 000000000630317

Built
1988
37 years old
Condition
Fair
inspected July 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
210 ft
1 main span
Daily traffic
18,000
2020 count
Owner
State
State Highway Agency

About this bridge

NC147S over SR1321 is a steel stringer/multi-beam or girder carrying NC147S over SR1321 in Durham County, North Carolina. It was built in 1988, so it is 37 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 18,000 vehicles a day, roughly 12% of them trucks, projected to reach 36,000 by 2040. The structure is 210 ft (64 m) long and 41 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

Location

Open in Google Maps
CarriesNC147S
CrossesSR1321
Location0.8 Mi. S. Jct. US15/501
RouteState Highway 147
CountyDurham County
StateNorth Carolina
Coordinates36.01348, -78.93656
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.
Substructure7 GoodSome minor problems.
Last inspectionJuly 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than 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 rating81.9 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20 + Mod
Structure length210 ft (64 m)
Longest span204 ft (62.1 m)
Deck width41 ft (12.4 m)
Roadway width37 ft (11.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic18,000 (2020)
Projected traffic36,000 by 2040
Trucks12%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed0.6 mi (1 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 over SR1321 built?

It was built in 1988, making it 37 years old in 2025.

What condition is NC147S over SR1321 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 NC147S over SR1321 carry?

About 18,000 vehicles per day (2020 count), of which roughly 12% are trucks.

How long is NC147S over SR1321?

The structure is 210 ft (64 m) long with a longest span of 204 ft (62.1 m) and a deck 41 ft wide.

Who owns NC147S over SR1321?

It is owned by the State Highway Agency.