US Bridges

I-84 (hwy 002) EB over Three Mile Canyon East

Good

Morrow County, Oregon · 046 MI E Heppner JCT · Structure no. 09307A002 15175

Built
1964
61 years old
Condition
Good
inspected July 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
196 ft
3 main spans
Daily traffic
7,162
2022 count
Owner
State
State Highway Agency

About this bridge

I-84 (hwy 002) EB over Three Mile Canyon East is a prestressed concrete stringer/multi-beam or girder carrying I-84 (hwy 002) EB over Three Mile Canyon East in Morrow County, Oregon. It was built in 1964, so it is 61 years old, older than the Oregon average of 49.9 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 7,162 vehicles a day, roughly 26% of them trucks, projected to reach 8,450 by 2042. The structure is 196 ft (59.7 m) long and 41 ft wide.

CarriesI-84 (hwy 002) EB
CrossesThree Mile Canyon East
Location046 MI E Heppner JCT
RouteInterstate 84
StateOregon
Coordinates45.8089, -119.9545
Functional classRural Principal Arterial - Interstate

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure8 Very GoodNo problems noted.
Substructure7 GoodSome minor problems.
Last inspectionJuly 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating24.7 US tons
Inventory rating19 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length196 ft (59.7 m)
Longest span68 ft (20.7 m)
Deck width41 ft (12.6 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic7,162 (2022)
Projected traffic8,450 by 2042
Trucks26%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
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 statusHistorical significance not determinable at this time
Work proposedNone recorded
Estimated improvement cost—
NavigationNot applicable (no waterway)

Frequently asked questions

When was I-84 (hwy 002) EB over Three Mile Canyon East built?

It was built in 1964, making it 61 years old in 2025.

What condition is I-84 (hwy 002) EB over Three Mile Canyon East in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in July 2024.

How much traffic does I-84 (hwy 002) EB over Three Mile Canyon East carry?

About 7,162 vehicles per day (2022 count), of which roughly 26% are trucks.

How long is I-84 (hwy 002) EB over Three Mile Canyon East?

The structure is 196 ft (59.7 m) long with a longest span of 68 ft (20.7 m) and a deck 41 ft wide.

Who owns I-84 (hwy 002) EB over Three Mile Canyon East?

It is owned by the State Highway Agency.