US Bridges

I40W over Seaboard Coastline RR

Fair

Durham County, North Carolina · 0.1 Mi.E. of JCT.NC55 · Structure no. 000000000630291

Built
1985
40 years old
Condition
Fair
inspected January 2025
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
119 ft
3 main spans
Daily traffic
69,000
2017 count
Owner
State
State Highway Agency

About this bridge

I40W over Seaboard Coastline RR is a prestressed concrete stringer/multi-beam or girder carrying I40W over Seaboard Coastline RR in Durham County, North Carolina. It was built in 1985, so it is 40 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 69,000 vehicles a day, roughly 16% of them trucks, projected to reach 138,000 by 2040. The structure is 119 ft (36.2 m) long and 58 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

Location

Open in Google Maps
CarriesI40W
CrossesSeaboard Coastline RR
Location0.1 Mi.E. of JCT.NC55
RouteInterstate 40
CountyDurham County
StateNorth Carolina
Coordinates35.90674, -78.89248
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Last inspectionJanuary 2025
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating93.9 US tons
Inventory rating46 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20 + Mod
Structure length119 ft (36.2 m)
Longest span39 ft (11.8 m)
Deck width58 ft (17.6 m)
Roadway width55 ft (16.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic69,000 (2017)
Projected traffic138,000 by 2040
Trucks16%
Lanes on structure3
Traffic directionOne-way traffic
CarriesHighway
CrossesRailroad
Detour if closed0.6 mi (1 km)
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkInterstate 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 I40W over Seaboard Coastline RR built?

It was built in 1985, making it 40 years old in 2025.

What condition is I40W over Seaboard Coastline RR 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 January 2025.

How much traffic does I40W over Seaboard Coastline RR carry?

About 69,000 vehicles per day (2017 count), of which roughly 16% are trucks.

How long is I40W over Seaboard Coastline RR?

The structure is 119 ft (36.2 m) long with a longest span of 39 ft (11.8 m) and a deck 58 ft wide.

Who owns I40W over Seaboard Coastline RR?

It is owned by the State Highway Agency.