Structure 67T006000000000 · Washington County, OR

North Dakota ST over Fanno Creek

Carries North Dakota ST over Fanno Creek, 0010 W Greenburg RD.

Overall conditionPoor

Set by its lowest-rated component: Substructure at 3 of 9.

How ratings work
Deck5/9 · Fair
Superstructure4/9 · Poor
Substructuresets the rating3/9 · Serious
Channelnot part of overall6/9 · Satisfactory
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT48 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 5/9Superstructure 4/9Substructure 3/9 · sets the rating

48 ft end to end, longest span 15 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.

Built196264 years old
Length47.9 ft14.6 m
Daily traffic6,925counted 2020
Last inspectedJuly 2024every 12 months

Location

StateOregon
CountyWashington
Location0010 W Greenburg RD
CarriesNorth Dakota ST
CrossesFanno Creek
Coordinates45.43898, -122.78280

Physical Characteristics

MaterialWood or Timber
DesignStringer/Multi-beam
Total Length47.9 ft (14.6 m)
Max Span15.1 ft (4.6 m)
Deck Width20.7 ft (6.3 m)
Deck Area92.0 sq m
Main Spans3
Year Built1962

Traffic

Avg Daily Traffic6,925 (2020)
Truck Traffic5%
Lanes On Bridge2

Inspection & Ownership

Last InspectionJuly 2024
Inspection FrequencyEvery 12 months
OwnerCity/Municipal Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour CriticalUnknown
Structure Number67T006000000000

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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