US Bridges

I-5 (hwy 001) NB over Beaver Dam Creek

Fair

Washington County, Oregon · 0.5 MI S of Tualatin R. · Structure no. 07494C001 28938

Built
1975
50 years old, rebuilt 1991
Condition
Fair
inspected January 2024
Type
Slab
Concrete Continuous
Length
140 ft
3 main spans
Daily traffic
78,008
2022 count
Owner
State
State Highway Agency

About this bridge

I-5 (hwy 001) NB over Beaver Dam Creek is a concrete continuous slab carrying I-5 (hwy 001) NB over Beaver Dam Creek in Washington County, Oregon. It was built in 1975 and reconstructed in 1991, 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 78,008 vehicles a day, roughly 9% of them trucks, projected to reach 91,750 by 2042. The structure is 140 ft (42.7 m) long and 85 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesI-5 (hwy 001) NB
CrossesBeaver Dam Creek
Location0.5 MI S of Tualatin R.
RouteInterstate 5
CountyWashington County
StateOregon
Coordinates45.3809, -122.75293
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.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJanuary 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to present minimum criteria
Deck geometry9: Superior to present desirable criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating35.4 US tons
Inventory rating27.1 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length140 ft (42.7 m)
Longest span56 ft (17.1 m)
Deck width85 ft (25.8 m)
Roadway width79 ft (24.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic78,008 (2022)
Projected traffic91,750 by 2042
Trucks9%
Lanes on structure3
Traffic directionOne-way traffic
CarriesHighway
CrossesWaterway
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—
NavigationNo navigation control on waterway

Frequently asked questions

When was I-5 (hwy 001) NB over Beaver Dam Creek built?

It was built in 1975, making it 50 years old in 2025. It was reconstructed in 1991.

What condition is I-5 (hwy 001) NB over Beaver Dam Creek 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 Beaver Dam Creek carry?

About 78,008 vehicles per day (2022 count), of which roughly 9% are trucks.

How long is I-5 (hwy 001) NB over Beaver Dam Creek?

The structure is 140 ft (42.7 m) long with a longest span of 56 ft (17.1 m) and a deck 85 ft wide.

Who owns I-5 (hwy 001) NB over Beaver Dam Creek?

It is owned by the State Highway Agency.