Structure 25T16 000 00223 · Multnomah County, OR

174th AVE over Johnson Creek

Carries 174th AVE over Johnson Creek, 022 Mi S Fap 24.

Overall conditionPoor

Set by its lowest-rated component: Substructure at 4 of 9.

How ratings work
Deck6/9 · Satisfactory
Superstructure6/9 · Satisfactory
Substructuresets the rating4/9 · Poor
Channelnot part of overall5/9 · Fair
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT105 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 6/9Superstructure 6/9Substructure 4/9 · sets the rating

105 ft end to end, longest span 29 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 multi-beam bridge.

Built195076 years old
Length105.0 ft32 m
Daily traffic9,838counted 2020
Last inspectedJuly 2024every 12 months

Location

StateOregon
CountyMultnomah
Location022 Mi S Fap 24
Carries174th AVE
CrossesJohnson Creek
Coordinates45.48663, -122.48473

Physical Characteristics

MaterialSteel Continuous
DesignStringer/Multi-beam
Total Length105.0 ft (32 m)
Max Span28.9 ft (8.8 m)
Deck Width31.5 ft (9.6 m)
Deck Area307.2 sq m
Main Spans2
Year Built1950

Traffic

Avg Daily Traffic9,838 (2020)
Truck Traffic10%
Lanes On Bridge2

Inspection & Ownership

Last InspectionJuly 2024
Inspection FrequencyEvery 12 months
OwnerCounty Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour CriticalUnknown
Structure Number25T16 000 00223

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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