US Bridges

I-5 (hwy 001) NB over Wilsonville Road

Fair

Clackamas County, Oregon · 0.8 MI N of Willamette R · Structure no. 17995 001 28388

Built
1999
26 years old
Condition
Fair
inspected January 2024
Type
Segmental Box Girder
Prestressed Concrete
Length
140 ft
1 main span
Daily traffic
61,726
2022 count
Owner
State
State Highway Agency

About this bridge

I-5 (hwy 001) NB over Wilsonville Road is a prestressed concrete segmental box girder carrying I-5 (hwy 001) NB over Wilsonville Road in Clackamas County, Oregon. It was built in 1999, so it is 26 years old, younger than the Oregon average of 49.9 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 61,726 vehicles a day, roughly 13% of them trucks, projected to reach 73,650 by 2042. The structure is 140 ft (42.8 m) long and 63 ft wide. If it were closed, the detour would be 12.4 mi (20 km).

Location

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CarriesI-5 (hwy 001) NB
CrossesWilsonville Road
Location0.8 MI N of Willamette R
RouteInterstate 5
CountyClackamas County
StateOregon
Coordinates45.30293, -122.76906
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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Last inspectionJanuary 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating39.2 US tons
Inventory rating30.3 US tons

Structure

Structure typeSegmental Box Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 25 or greater
Structure length140 ft (42.8 m)
Longest span140 ft (42.8 m)
Deck width63 ft (19.3 m)
Roadway width60 ft (18.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic61,726 (2022)
Projected traffic73,650 by 2042
Trucks13%
Lanes on structure3
Traffic directionOne-way traffic
CarriesOverpass structure at an interchange
CrossesHighway
Detour if closed12.4 mi (20 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 I-5 (hwy 001) NB over Wilsonville Road built?

It was built in 1999, making it 26 years old in 2025.

What condition is I-5 (hwy 001) NB over Wilsonville Road 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 2024.

How much traffic does I-5 (hwy 001) NB over Wilsonville Road carry?

About 61,726 vehicles per day (2022 count), of which roughly 13% are trucks.

How long is I-5 (hwy 001) NB over Wilsonville Road?

The structure is 140 ft (42.8 m) long with a longest span of 140 ft (42.8 m) and a deck 63 ft wide.

Who owns I-5 (hwy 001) NB over Wilsonville Road?

It is owned by the State Highway Agency.