US Bridges

HWY 489 over Snake River (adrian)

Fair

Malheur County, Oregon · 2.5 W. Ore-Ida State Line · Structure no. 04412A450Y01272

Built
1973
52 years old
Condition
Fair
inspected November 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete Continuous
Length
740 ft
6 main spans
Daily traffic
882
2022 count
Owner
State
State Highway Agency

About this bridge

HWY 489 over Snake River (adrian) is a prestressed concrete continuous stringer/multi-beam or girder carrying HWY 489 over Snake River (adrian) in Malheur County, Oregon. It was built in 1973, so it is 52 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 882 vehicles a day, roughly 23% of them trucks, projected to reach 950 by 2042. The structure is 740 ft (225.6 m) long and 42 ft wide. If it were closed, the detour would be 31.7 mi (51 km).

Location

Open in Google Maps
CarriesHWY 489
CrossesSnake River (adrian)
Location2.5 W. Ore-Ida State Line
RouteState Highway 201
CountyMalheur County
StateOregon
Coordinates43.73078, -117.07192
Functional classRural Major Collector

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 protection8 Very GoodNo problems noted.
Last inspectionNovember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation6: Equal to 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 rating36.4 US tons
Inventory rating28.2 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans6 (+2 approach)
Design loadHS 20
Structure length740 ft (225.6 m)
Longest span113 ft (34.4 m)
Deck width42 ft (12.9 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic882 (2022)
Projected traffic950 by 2042
Trucks23%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed31.7 mi (51 km)
TollOn a free road
National Highway SystemNo

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—
NavigationNo navigation control on waterway

Frequently asked questions

When was HWY 489 over Snake River (adrian) built?

It was built in 1973, making it 52 years old in 2025.

What condition is HWY 489 over Snake River (adrian) 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 November 2023.

How much traffic does HWY 489 over Snake River (adrian) carry?

About 882 vehicles per day (2022 count), of which roughly 23% are trucks.

How long is HWY 489 over Snake River (adrian)?

The structure is 740 ft (225.6 m) long with a longest span of 113 ft (34.4 m) and a deck 42 ft wide.

Who owns HWY 489 over Snake River (adrian)?

It is owned by the State Highway Agency.