US Bridges

HWY 1NB to HWY 144 over I-5 (hwy 001)

Fair

Washington County, Oregon · 2.63 MI N of Tualatin Rv · Structure no. 18480 001C29225

Built
2001
24 years old
Condition
Fair
inspected January 2024
Type
Box Beam or Girders - Single or Spread
Prestressed Concrete Continuous
Length
1,468 ft
8 main spans
Daily traffic
32,210
2022 count
Owner
State
State Highway Agency

About this bridge

HWY 1NB to HWY 144 over I-5 (hwy 001) is a prestressed concrete continuous box beam or girders - single or spread carrying HWY 1NB to HWY 144 over I-5 (hwy 001) in Washington County, Oregon. It was built in 2001, so it is 24 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 32,210 vehicles a day, roughly 9% of them trucks, projected to reach 68,186 by 2030. The structure is 1,468 ft (447.3 m) long and 44 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesHWY 1NB to HWY 144
CrossesI-5 (hwy 001)
Location2.63 MI N of Tualatin Rv
RouteInterstate 5
CountyWashington County
StateOregon
Coordinates45.42102, -122.74408
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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJanuary 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry9: Superior to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating60.4 US tons
Inventory rating46.4 US tons

Structure

Structure typeBox Beam or Girders - Single or Spread
MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans8
Design loadHS 25 or greater
Structure length1,468 ft (447.3 m)
Longest span194 ft (59.2 m)
Deck width44 ft (13.4 m)
Roadway width41 ft (12.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic32,210 (2022)
Projected traffic68,186 by 2030
Trucks9%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed1.2 mi (2 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 HWY 1NB to HWY 144 over I-5 (hwy 001) built?

It was built in 2001, making it 24 years old in 2025.

What condition is HWY 1NB to HWY 144 over I-5 (hwy 001) 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 HWY 1NB to HWY 144 over I-5 (hwy 001) carry?

About 32,210 vehicles per day (2022 count), of which roughly 9% are trucks.

How long is HWY 1NB to HWY 144 over I-5 (hwy 001)?

The structure is 1,468 ft (447.3 m) long with a longest span of 194 ft (59.2 m) and a deck 44 ft wide.

Who owns HWY 1NB to HWY 144 over I-5 (hwy 001)?

It is owned by the State Highway Agency.