Structure 9752 000 00215 · Multnomah County, OR

Columbia BLVD over B-79 X N. Columbia Way

Carries Columbia BLVD over B-79 X N. Columbia Way, N Col BLVD Over N Col Way.

Overall conditionFair

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

How ratings work
Decksets the rating6/9 · Satisfactory
Superstructure7/9 · Good
Substructure8/9 · Very Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT227 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 6/9 · sets the ratingSuperstructure 7/9Substructure 8/9

227 ft end to end, longest span 112 ft: about 3 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.

Built196858 years old
Length227.0 ft69.2 m
Daily traffic19,379counted 2020
Last inspectedJuly 2024every 24 months

Location

StateOregon
CountyMultnomah
LocationN Col BLVD Over N Col Way
CarriesColumbia BLVD
CrossesB-79 X N. Columbia Way
Coordinates45.59470, -122.72693

Physical Characteristics

MaterialConcrete Continuous
DesignBox Beam - Multiple
Total Length227.0 ft (69.2 m)
Max Span111.9 ft (34.1 m)
Deck Width75.5 ft (23 m)
Deck Area1591.6 sq m
Main Spans3
Year Built1968

Traffic

Avg Daily Traffic19,379 (2020)
Truck Traffic25%
Lanes On Bridge4
Lanes Under Bridge4

Inspection & Ownership

Last InspectionJuly 2024
Inspection FrequencyEvery 24 months
OwnerCity/Municipal Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour CriticalNot applicable
Structure Number09752 000 00215

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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