US Bridges

HWY 141 over I-5 (hwy 001)

Fair

Washington County, Oregon · 4.0 MI S of Tualatin R · Structure no. 07579A141 01284

Built
1970
55 years old
Condition
Fair
inspected December 2023
Type
Box Beam or Girders - Multiple
Prestressed Concrete Continuous
Length
314 ft
2 main spans
Daily traffic
33,766
2022 count
Owner
State
State Highway Agency

About this bridge

HWY 141 over I-5 (hwy 001) is a prestressed concrete continuous box beam or girders - multiple carrying HWY 141 over I-5 (hwy 001) in Washington County, Oregon. It was built in 1970, so it is 55 years old, older 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 33,766 vehicles a day, roughly 2% of them trucks, projected to reach 48,700 by 2042. The structure is 314 ft (95.7 m) long and 87 ft wide. If it were closed, the detour would be 12.4 mi (20 km).

Location

Open in Google Maps
CarriesHWY 141
CrossesI-5 (hwy 001)
Location4.0 MI S of Tualatin R
RouteState Highway 141
CountyWashington County
StateOregon
Coordinates45.33613, -122.76934
Functional classUrban Minor Arterial

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 inspectionDecember 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 geometry9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating33.2 US tons
Inventory rating25.7 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans2 (+2 approach)
Design loadHS 20
Structure length314 ft (95.7 m)
Longest span141 ft (43 m)
Deck width87 ft (26.6 m)
Roadway width78 ft (23.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic33,766 (2022)
Projected traffic48,700 by 2042
Trucks2%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesOverpass structure at an interchange
CrossesHighway
Detour if closed12.4 mi (20 km)
TollOn a free road
National Highway SystemNo

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 141 over I-5 (hwy 001) built?

It was built in 1970, making it 55 years old in 2025.

What condition is HWY 141 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 December 2023.

How much traffic does HWY 141 over I-5 (hwy 001) carry?

About 33,766 vehicles per day (2022 count), of which roughly 2% are trucks.

How long is HWY 141 over I-5 (hwy 001)?

The structure is 314 ft (95.7 m) long with a longest span of 141 ft (43 m) and a deck 87 ft wide.

Who owns HWY 141 over I-5 (hwy 001)?

It is owned by the State Highway Agency.