Structure 1463A007 26681 · Malheur County, OR

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

Carries US 20 (hwy 007) over Snake River(nyssa), Oregon-idaho State LN.

Overall conditionFair

Set by its lowest-rated component: Substructure at 5 of 9.

How ratings work
Deck7/9 · Good
Superstructure6/9 · Satisfactory
Substructuresets the rating5/9 · Fair
Channelnot part of overall6/9 · Satisfactory
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT697 FT OVERALL100 FT0ELEVATION · LENGTHS TO SCALE
Deck 7/9Superstructure 6/9Substructure 5/9 · sets the rating

697 ft end to end, longest span 228 ft: about 1.9 football fields. Lengths and the semi-truck on the deck are drawn to the same scale. Each part is colored by its latest inspection rating. The inventory records lengths but not heights or the layout of the shorter spans, so those are drawn as typical for a girder bridge.

Built1957rebuilt 2005
Length696.9 ft212.4 m
Daily traffic5,100counted 2022
Last inspectedOctober 2023every 24 months

Location

StateOregon
CountyMalheur
LocationOregon-idaho State LN
CarriesUS 20 (hwy 007)
CrossesSnake River(nyssa)
Coordinates43.87700, -116.98390

Physical Characteristics

MaterialSteel Continuous
DesignGirder and Floorbeam
Total Length696.9 ft (212.4 m)
Max Span228.0 ft (69.5 m)
Deck Width52.5 ft (16 m)
Deck Area3398.4 sq m
Main Spans3
Year Built1957 (reconstructed 2005)

Traffic

Avg Daily Traffic5,100 (2022)
Truck Traffic14%
Lanes On Bridge2

Inspection & Ownership

Last InspectionOctober 2023
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceHistorical significance is not determined
Scour Critical3 — Scour critical
Structure Number01463A007 26681

How Bridge Ratings Work

Inspectors rate each major part of a bridge (the deck you drive on, the superstructure of beams that holds it up, and the substructure of piers and abutments beneath) on a 0–9 scale. A bridge's overall condition is its lowest of those ratings, so one deteriorated component makes the whole bridge "poor."

0Failed
1Imminent failure
2Critical
3Serious
4Poor
5Fair
6Satisfactory
7Good
8Very good
9Excellent
Good · lowest component 7–9
Fair · lowest component 5–6
Poor · lowest component 0–4

A poor rating is not a closure. It means the bridge is flagged for priority repair or replacement; bridges judged unsafe are closed or posted with weight limits. The waterway (channel) rating is reported, but it does not count toward the overall classification.

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