Structure 11112 000 01132 · Multnomah County, OR

Fas A656 over Sandy River

Carries Fas A656 over Sandy River, 040 Mi SE Troutdale.

Overall conditionPoor

Set by its lowest-rated component: Substructure at 2 of 9.

How ratings work
Deck4/9 · Poor
Superstructure5/9 · Fair
Substructuresets the rating2/9 · Critical
Channelnot part of overall6/9 · Satisfactory
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT278 FT OVERALL50 FT0ELEVATION · LENGTHS TO SCALE
Deck 4/9Superstructure 5/9Substructure 2/9 · sets the rating

278 ft end to end: 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 through truss.

Built1914112 years old
Length277.9 ft84.7 m
Daily traffic6,445counted 2020
Last inspectedOctober 2024every 12 months

Location

StateOregon
CountyMultnomah
Location040 Mi SE Troutdale
CarriesFas A656
CrossesSandy River
Coordinates45.51520, -122.36127

Physical Characteristics

MaterialSteel
DesignTruss - Thru
Total Length277.9 ft (84.7 m)
Max Span200.1 ft (61 m)
Deck Width20.0 ft (6.1 m)
Deck Area516.7 sq m
Main Spans1
Year Built1914

Traffic

Avg Daily Traffic6,445 (2020)
Truck Traffic10%
Lanes On Bridge2

Inspection & Ownership

Last InspectionOctober 2024
Inspection FrequencyEvery 12 months
OwnerCounty Highway Agency
Historical SignificanceBridge is on the National Register of Historic Places
Scour Critical7 — Countermeasures installed
Structure Number11112 000 01132

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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