US Bridges

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

Fair

Washington County, Oregon · 0.4 MI S of Tualatin R. · Structure no. 16955 001C28940

Built
1991
34 years old
Condition
Fair
inspected January 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
1,132 ft
6 main spans
Daily traffic
10,792
2022 count
Owner
State
State Highway Agency

About this bridge

I-5 (hwy 001) Con over Beaver Dam Creek is a prestressed concrete stringer/multi-beam or girder carrying I-5 (hwy 001) Con over Beaver Dam Creek in Washington County, Oregon. It was built in 1991, so it is 34 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 10,792 vehicles a day, roughly 9% of them trucks, projected to reach 12,300 by 2030. The structure is 1,132 ft (345 m) long and 25 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesI-5 (hwy 001) Con
CrossesBeaver Dam Creek
Location0.4 MI S of Tualatin R.
RouteInterstate 5
CountyWashington County
StateOregon
Coordinates45.38105, -122.75225
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.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionJanuary 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating33.2 US tons
Inventory rating25.7 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans6 (+10 approach)
Design loadHS 25 or greater
Structure length1,132 ft (345 m)
Longest span110 ft (33.5 m)
Deck width25 ft (7.6 m)
Roadway width20 ft (6.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic10,792 (2022)
Projected traffic12,300 by 2030
Trucks9%
Lanes on structure1
Traffic directionOne-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemYes

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) Con over Beaver Dam Creek built?

It was built in 1991, making it 34 years old in 2025.

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

About 10,792 vehicles per day (2022 count), of which roughly 9% are trucks.

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

The structure is 1,132 ft (345 m) long with a longest span of 110 ft (33.5 m) and a deck 25 ft wide.

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

It is owned by the State Highway Agency.