Structure 18097 455Y02773 · Malheur County, OR

US 30 (hwy 493) over I-84 (hwy 6 Mp 376.72)

Carries US 30 (hwy 493) over I-84 (hwy 6 Mp 376.72), 1.7 Mi. W. Or-id Line.

Overall conditionFair

Set by its lowest-rated component: Deck at 6 of 9.

How ratings work
Decksets the rating6/9 · Satisfactory
Superstructure7/9 · Good
Substructure7/9 · Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT302 FT OVERALL50 FT0ELEVATION · LENGTHS TO SCALE
Deck 6/9 · sets the ratingSuperstructure 7/9Substructure 7/9

302 ft end to end, longest span 151 ft: about 4 semi-trucks nose to tail. 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 box-beam bridge.

Built199828 years old
Length301.8 ft92 m
Daily traffic26,810counted 2022
Last inspectedApril 2024every 24 months

Location

StateOregon
CountyMalheur
Location1.7 Mi. W. Or-id Line
CarriesUS 30 (hwy 493)
CrossesI-84 (hwy 6 Mp 376.72)
Coordinates44.02474, -116.94887

Physical Characteristics

MaterialPrestressed Concrete Continuous
DesignBox Beam - Multiple
Total Length301.8 ft (92 m)
Max Span150.9 ft (46 m)
Deck Width103.0 ft (31.4 m)
Deck Area2888.8 sq m
Main Spans2
Year Built1998

Traffic

Avg Daily Traffic26,810 (2022)
Truck Traffic10%
Lanes On Bridge5
Lanes Under Bridge6

Inspection & Ownership

Last InspectionApril 2024
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour CriticalNot applicable
Structure Number18097 455Y02773

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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