Structure 8194R003 00010 · Multnomah County, OR

HWY 3 Conn over HWY 1 SB

Carries HWY 3 Conn over HWY 1 SB, 0.5 Mi N Of Ross Island B.

Overall conditionFair

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

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

Elevation

Side view, colored by inspection rating
CAR · 15 FT118 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 6/9 · sets the ratingSuperstructure 6/9 · sets the ratingSubstructure 7/9

118 ft end to end, longest span 68 ft. Lengths and the car 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.

Built1926rebuilt 1959
Length118.1 ft36 m
Daily traffic1,940counted 2022
Last inspectedDecember 2023every 24 months

Location

StateOregon
CountyMultnomah
Location0.5 Mi N Of Ross Island B
CarriesHWY 3 Conn
CrossesHWY 1 SB
Coordinates45.50160, -122.67424

Physical Characteristics

MaterialConcrete Continuous
DesignBox Beam - Multiple
Total Length118.1 ft (36 m)
Max Span67.9 ft (20.7 m)
Deck Width29.9 ft (9.1 m)
Deck Area327.6 sq m
Main Spans2
Year Built1926 (reconstructed 1959)

Traffic

Avg Daily Traffic1,940 (2022)
Truck Traffic1%
Lanes On Bridge1
Lanes Under Bridge3

Inspection & Ownership

Last InspectionDecember 2023
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour CriticalNot applicable
Structure Number08194R003 00010

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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