Structure 9155 061 00088 · Multnomah County, OR

SW 4th AVE over HWY 61

Carries SW 4th AVE over HWY 61, 0.3 Mi S Of SW Park.

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
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT263 FT OVERALL50 FT0ELEVATION · LENGTHS TO SCALE
Deck 6/9Superstructure 5/9 · sets the ratingSubstructure 6/9

263 ft end to end, longest span 111 ft: about 4 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.

Built196462 years old
Length263.5 ft80.3 m
Daily traffic65,460counted 2020
Last inspectedJuly 2023every 24 months

Location

StateOregon
CountyMultnomah
Location0.3 Mi S Of SW Park
CarriesSW 4th AVE
CrossesHWY 61
Coordinates45.50633, -122.68201

Physical Characteristics

MaterialConcrete Continuous
DesignBox Beam - Multiple
Total Length263.5 ft (80.3 m)
Max Span111.2 ft (33.9 m)
Deck Width50.5 ft (15.4 m)
Deck Area1236.6 sq m
Main Spans3
Year Built1964

Traffic

Avg Daily Traffic65,460 (2020)
Truck Traffic11%
Lanes On Bridge2
Lanes Under Bridge9

Inspection & Ownership

Last InspectionJuly 2023
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour CriticalNot applicable
Structure Number09155 061 00088

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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