US Bridges

Or 201 (hwy 491) over Snake River (weiser)

Good

Malheur County, Oregon · Idaho St. Line at Weiser · Structure no. 13811 455Y01366

Built
2010
15 years old
Condition
Good
inspected September 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
876 ft
6 main spans
Daily traffic
4,357
2022 count
Owner
State
State Highway Agency

About this bridge

Or 201 (hwy 491) over Snake River (weiser) is a prestressed concrete stringer/multi-beam or girder carrying Or 201 (hwy 491) over Snake River (weiser) in Malheur County, Oregon. It was built in 2010, so it is 15 years old, younger 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 4,357 vehicles a day, roughly 17% of them trucks, projected to reach 4,900 by 2042. The structure is 876 ft (267 m) long and 46 ft wide. If it were closed, the detour would be 21.7 mi (35 km).

Location

Open in Google Maps
CarriesOr 201 (hwy 491)
CrossesSnake River (weiser)
LocationIdaho St. Line at Weiser
RouteState Highway 201
CountyMalheur County
StateOregon
Coordinates44.2444, -116.98184
Functional classRural Minor Arterial

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.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionSeptember 2023
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
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 rating99 US tons
Inventory rating57 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans6
Design loadHS 25 or greater
Structure length876 ft (267 m)
Longest span143 ft (43.7 m)
Deck width46 ft (14.1 m)
Roadway width34 ft (10.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,357 (2022)
Projected traffic4,900 by 2042
Trucks17%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed21.7 mi (35 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—
NavigationNavigation control on waterway (bridge permit required)

Frequently asked questions

When was Or 201 (hwy 491) over Snake River (weiser) built?

It was built in 2010, making it 15 years old in 2025.

What condition is Or 201 (hwy 491) over Snake River (weiser) 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 September 2023.

How much traffic does Or 201 (hwy 491) over Snake River (weiser) carry?

About 4,357 vehicles per day (2022 count), of which roughly 17% are trucks.

How long is Or 201 (hwy 491) over Snake River (weiser)?

The structure is 876 ft (267 m) long with a longest span of 143 ft (43.7 m) and a deck 46 ft wide.

Who owns Or 201 (hwy 491) over Snake River (weiser)?

It is owned by the State Highway Agency.