Structure 8995C01EX00592 · Multnomah County, OR

HWY 081 over HWY 001

Carries HWY 081 over HWY 001, 6.0 Mi N Of Portland Cc.

Overall conditionFair

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

How ratings work
Decksets the rating6/9 · Satisfactory
Superstructure8/9 · Very Good
Substructuresets the rating6/9 · Satisfactory
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT640 FT OVERALL100 FT0ELEVATION · LENGTHS TO SCALE
Deck 6/9 · sets the ratingSuperstructure 8/9Substructure 6/9 · sets the rating

640 ft end to end, longest span 185 ft: about 1.8 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 box-beam bridge.

Built199135 years old
Length640.4 ft195.2 m
Daily traffic14,204counted 2022
Last inspectedJanuary 2025every 24 months

Location

StateOregon
CountyMultnomah
Location6.0 Mi N Of Portland Cc
CarriesHWY 081
CrossesHWY 001
Coordinates45.60399, -122.68257

Physical Characteristics

MaterialPrestressed Concrete Continuous
DesignBox Beam - Multiple
Total Length640.4 ft (195.2 m)
Max Span185.0 ft (56.4 m)
Deck Width84.6 ft (25.8 m)
Deck Area5036.2 sq m
Main Spans4
Year Built1991

Traffic

Avg Daily Traffic14,204 (2022)
Truck Traffic8%
Lanes On Bridge5
Lanes Under Bridge8

Inspection & Ownership

Last InspectionJanuary 2025
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour CriticalNot applicable
Structure Number08995C01EX00592

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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