US Bridges

I-5 (hwy 001) over Lower Boonesferry

Fair

Washington County, Oregon · 0.6 MI N of Tualatin Rv · Structure no. 07729A001 29048

Built
1975
50 years old
Condition
Fair
inspected January 2024
Type
Box Beam or Girders - Multiple
Concrete Continuous
Length
222 ft
3 main spans
Daily traffic
156,558
2022 count
Owner
State
State Highway Agency

About this bridge

I-5 (hwy 001) over Lower Boonesferry is a concrete continuous box beam or girders - multiple carrying I-5 (hwy 001) over Lower Boonesferry in Washington County, Oregon. It was built in 1975, so it is 50 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 156,558 vehicles a day, roughly 9% of them trucks, projected to reach 181,000 by 2042. The structure is 222 ft (67.7 m) long and 135 ft wide.

Location

Open in Google Maps
CarriesI-5 (hwy 001)
CrossesLower Boonesferry
Location0.6 MI N of Tualatin Rv
RouteInterstate 5
CountyWashington County
StateOregon
Coordinates45.39641, -122.74719
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
Deck7 GoodSome minor problems.
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 alignment8: Equal to present desirable criteria
Operating rating39.7 US tons
Inventory rating30.3 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length222 ft (67.7 m)
Longest span120 ft (36.6 m)
Deck width135 ft (41.2 m)
Roadway width130 ft (39.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic156,558 (2022)
Projected traffic181,000 by 2042
Trucks9%
Lanes on structure6
Traffic directionTwo-way traffic
CarriesOverpass structure at an interchange
CrossesHighway
Detour if closed—
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) over Lower Boonesferry built?

It was built in 1975, making it 50 years old in 2025.

What condition is I-5 (hwy 001) over Lower Boonesferry 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) over Lower Boonesferry carry?

About 156,558 vehicles per day (2022 count), of which roughly 9% are trucks.

How long is I-5 (hwy 001) over Lower Boonesferry?

The structure is 222 ft (67.7 m) long with a longest span of 120 ft (36.6 m) and a deck 135 ft wide.

Who owns I-5 (hwy 001) over Lower Boonesferry?

It is owned by the State Highway Agency.