Structure 8589Y614 00000 · Multnomah County, OR

Off Ramp over Water AVE Conn EB

Carries Off Ramp over Water AVE Conn EB, East End Morrison Br.

Overall conditionFair

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

How ratings work
Decksets the rating6/9 · Satisfactory
Superstructure8/9 · Very Good
Substructure8/9 · Very Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT330 FT OVERALL50 FT0ELEVATION · LENGTHS TO SCALE
Deck 6/9 · sets the ratingSuperstructure 8/9Substructure 8/9

330 ft end to end, longest span 139 ft: about 5 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 multi-beam bridge.

Built195868 years old
Length330.1 ft100.6 m
Daily traffic1,606counted 2020
Last inspectedFebruary 2025every 24 months

Location

StateOregon
CountyMultnomah
LocationEast End Morrison Br
CarriesOff Ramp
CrossesWater AVE Conn EB
Coordinates45.51670, -122.66713

Physical Characteristics

MaterialSteel
DesignStringer/Multi-beam
Total Length330.1 ft (100.6 m)
Max Span139.1 ft (42.4 m)
Deck Width30.8 ft (9.4 m)
Deck Area945.6 sq m
Main Spans3
Year Built1958

Traffic

Avg Daily Traffic1,606 (2020)
Truck Traffic10%
Lanes On Bridge1
Lanes Under Bridge7

Inspection & Ownership

Last InspectionFebruary 2025
Inspection FrequencyEvery 24 months
OwnerCounty Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour CriticalNot applicable
Structure Number08589Y614 00000

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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