Structure 7949C009 00241 · Clatsop County, OR

Us101 (hwy 9) over Columbia River

Carries Us101 (hwy 9) over Columbia River, Main Through Truss Spans.

Overall conditionFair

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

How ratings work
Deck6/9 · Satisfactory
Superstructuresets the rating5/9 · Fair
Substructure6/9 · Satisfactory
Channelnot part of overall7/9 · Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT2,469 FT OVERALL500 FT0ELEVATION · LENGTHS TO SCALE
Deck 6/9Superstructure 5/9 · sets the ratingSubstructure 6/9

2,469 ft end to end, longest span 1,232 ft: about 6.9 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 through truss.

Built196660 years old
Length2469.2 ft752.6 m
Daily traffic22,526counted 2024
Last inspectedMay 2024every 24 months

Location

StateOregon
CountyClatsop
LocationMain Through Truss Spans
CarriesUs101 (hwy 9)
CrossesColumbia River
Coordinates46.20409, -123.85599

Physical Characteristics

MaterialSteel Continuous
DesignTruss - Thru
Total Length2469.2 ft (752.6 m)
Max Span1232.0 ft (375.5 m)
Deck Width33.1 ft (10.1 m)
Deck Area7601.3 sq m
Main Spans3
Year Built1966

Traffic

Avg Daily Traffic22,526 (2024)
Truck Traffic20%
Lanes On Bridge2
Lanes Under Bridge4

Inspection & Ownership

Last InspectionMay 2024
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is possibly eligible (requires evaluation)
Scour Critical5 — Stable for scour
Structure Number07949C009 00241

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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