US Bridges

US15 US501S over SR1308

Fair

Durham County, North Carolina · 0.2MI.N.JCT.SR1303 · Structure no. 000000000630083

Built
1971
54 years old
Condition
Fair
inspected June 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
166 ft
3 main spans
Daily traffic
51,000
2020 count
Owner
State
State Highway Agency

About this bridge

US15 US501S over SR1308 is a steel stringer/multi-beam or girder carrying US15 US501S over SR1308 in Durham County, North Carolina. It was built in 1971, so it is 54 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 51,000 vehicles a day, roughly 12% of them trucks, projected to reach 102,000 by 2040. The structure is 166 ft (50.5 m) long and 42 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

Location

Open in Google Maps
CarriesUS15 US501S
CrossesSR1308
Location0.2MI.N.JCT.SR1303
RouteU.S. Route 15
CountyDurham County
StateNorth Carolina
Coordinates35.98385, -78.95809
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.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
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 geometry6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating71 US tons
Inventory rating42 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20 + Mod
Structure length166 ft (50.5 m)
Longest span90 ft (27.4 m)
Deck width42 ft (12.9 m)
Roadway width38 ft (11.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic51,000 (2020)
Projected traffic102,000 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 SystemYes
Strategic Highway NetworkNon-Interstate STRAHNET route

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 US15 US501S over SR1308 built?

It was built in 1971, making it 54 years old in 2025.

What condition is US15 US501S over SR1308 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 US15 US501S over SR1308 carry?

About 51,000 vehicles per day (2020 count), of which roughly 12% are trucks.

How long is US15 US501S over SR1308?

The structure is 166 ft (50.5 m) long with a longest span of 90 ft (27.4 m) and a deck 42 ft wide.

Who owns US15 US501S over SR1308?

It is owned by the State Highway Agency.