US Bridges

I-84 (hwy 002) EB over Moffett Creek

Fair

Multnomah County, Oregon · 4.6 MI W Cascade Locks · Structure no. 20855 002 03898

Built
2009
16 years old
Condition
Fair
inspected June 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
460 ft
3 main spans
Daily traffic
13,724
2022 count
Owner
State
State Highway Agency

About this bridge

I-84 (hwy 002) EB over Moffett Creek is a steel continuous stringer/multi-beam or girder carrying I-84 (hwy 002) EB over Moffett Creek in Multnomah County, Oregon. It was built in 2009, so it is 16 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 13,724 vehicles a day, roughly 20% of them trucks, projected to reach 17,550 by 2042. The structure is 460 ft (140.2 m) long and 45 ft wide.

Location

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CarriesI-84 (hwy 002) EB
CrossesMoffett Creek
Location4.6 MI W Cascade Locks
RouteInterstate 84
CountyMultnomah County
StateOregon
Coordinates45.6233, -121.97711
Functional classRural 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.
Superstructure7 GoodSome minor problems.
Substructure8 Very GoodNo problems noted.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionJune 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation7: Better than present minimum criteria
Deck geometry8: Equal to present desirable criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating76.4 US tons
Inventory rating59 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHL 93
Structure length460 ft (140.2 m)
Longest span200 ft (61 m)
Deck width45 ft (13.8 m)
Roadway width42 ft (12.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic13,724 (2022)
Projected traffic17,550 by 2042
Trucks20%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesWaterway
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—
NavigationNo navigation control on waterway

Frequently asked questions

When was I-84 (hwy 002) EB over Moffett Creek built?

It was built in 2009, making it 16 years old in 2025.

What condition is I-84 (hwy 002) EB over Moffett 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 June 2023.

How much traffic does I-84 (hwy 002) EB over Moffett Creek carry?

About 13,724 vehicles per day (2022 count), of which roughly 20% are trucks.

How long is I-84 (hwy 002) EB over Moffett Creek?

The structure is 460 ft (140.2 m) long with a longest span of 200 ft (61 m) and a deck 45 ft wide.

Who owns I-84 (hwy 002) EB over Moffett Creek?

It is owned by the State Highway Agency.