US Bridges

US 20 (hwy 007) over Snake River(nyssa)

Fair

Malheur County, Oregon · Oregon-Idaho State LN · Structure no. 01463A007 26681

Built
1957
68 years old, rebuilt 2005
Condition
Fair
inspected October 2023
Type
Girder and Floorbeam System
Steel Continuous
Length
697 ft
3 main spans
Daily traffic
5,100
2022 count
Owner
State
State Highway Agency

About this bridge

US 20 (hwy 007) over Snake River(nyssa) is a steel continuous girder and floorbeam system carrying US 20 (hwy 007) over Snake River(nyssa) in Malheur County, Oregon. It was built in 1957 and reconstructed in 2005, so it is 68 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 5 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 5,100 vehicles a day, roughly 14% of them trucks, projected to reach 5,200 by 2042. The structure is 697 ft (212.4 m) long and 52 ft wide. If it were closed, the detour would be 123.7 mi (199 km).

Location

Open in Google Maps
CarriesUS 20 (hwy 007)
CrossesSnake River(nyssa)
LocationOregon-Idaho State LN
RouteU.S. Route 20
CountyMalheur County
StateOregon
Coordinates43.877, -116.9839
Functional classRural Minor Arterial

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.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionOctober 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry9: Superior to present desirable criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating25.4 US tons
Inventory rating19.6 US tons

Structure

Structure typeGirder and Floorbeam System
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3 (+2 approach)
Design loadH 20
Structure length697 ft (212.4 m)
Longest span228 ft (69.5 m)
Deck width52 ft (16 m)
Roadway width50 ft (15.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic5,100 (2022)
Projected traffic5,200 by 2042
Trucks14%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed123.7 mi (199 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 US 20 (hwy 007) over Snake River(nyssa) built?

It was built in 1957, making it 68 years old in 2025. It was reconstructed in 2005.

What condition is US 20 (hwy 007) over Snake River(nyssa) 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 October 2023.

How much traffic does US 20 (hwy 007) over Snake River(nyssa) carry?

About 5,100 vehicles per day (2022 count), of which roughly 14% are trucks.

How long is US 20 (hwy 007) over Snake River(nyssa)?

The structure is 697 ft (212.4 m) long with a longest span of 228 ft (69.5 m) and a deck 52 ft wide.

Who owns US 20 (hwy 007) over Snake River(nyssa)?

It is owned by the State Highway Agency.