US Bridges

I-84 (hwy 002) EB over Tanner Creek

Fair

Multnomah County, Oregon · 3.4 MI W Cascade Locks · Structure no. 02062B002 04014

Built
1962
63 years old
Condition
Fair
inspected June 2023
Type
Box Beam or Girders - Multiple
Concrete Continuous
Length
439 ft
4 main spans
Daily traffic
13,724
2022 count
Owner
State
State Highway Agency

About this bridge

I-84 (hwy 002) EB over Tanner Creek is a concrete continuous box beam or girders - multiple carrying I-84 (hwy 002) EB over Tanner Creek in Multnomah County, Oregon. It was built in 1962, so it is 63 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 13,724 vehicles a day, roughly 20% of them trucks, projected to reach 17,550 by 2042. The structure is 439 ft (133.8 m) long and 41 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesI-84 (hwy 002) EB
CrossesTanner Creek
Location3.4 MI W Cascade Locks
RouteInterstate 84
CountyMultnomah County
StateOregon
Coordinates45.63144, -121.95642
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
Deck7 GoodSome minor problems.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJune 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation3: Basically intolerable, requiring high priority of corrective action
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating22.2 US tons
Inventory rating17.2 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans4 (+2 approach)
Design loadHS 20
Structure length439 ft (133.8 m)
Longest span85 ft (25.9 m)
Deck width41 ft (12.4 m)
Roadway width38 ft (11.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic13,724 (2022)
Projected traffic17,550 by 2042
Trucks20%
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 proposedWidening of existing bridge without deck rehabilitation
Estimated improvement cost$2.2 million
NavigationNo navigation control on waterway

Frequently asked questions

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

It was built in 1962, making it 63 years old in 2025.

What condition is I-84 (hwy 002) EB over Tanner 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 Tanner 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 Tanner Creek?

The structure is 439 ft (133.8 m) long with a longest span of 85 ft (25.9 m) and a deck 41 ft wide.

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

It is owned by the State Highway Agency.