Structure 7206 01WX00100 · Multnomah County, OR

Or 99w SB over B-152 Interstate Semi Vi

Carries Or 99w SB over B-152 Interstate Semi Vi, N Interstate Nr N Dixon.

Overall conditionFair

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

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

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT362 FT OVERALL50 FT0ELEVATION · LENGTHS TO SCALE
Deck 6/9Superstructure 6/9Substructure 6/9

362 ft end to end, longest span 30 ft: about 5 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 multi-beam bridge.

Built195076 years old
Length361.9 ft110.3 m
Daily traffic10,579counted 2020
Last inspectedMarch 2023every 24 months

Location

StateOregon
CountyMultnomah
LocationN Interstate Nr N Dixon
CarriesOr 99w SB
CrossesB-152 Interstate Semi Vi
Coordinates45.53389, -122.67306

Physical Characteristics

MaterialConcrete Continuous
DesignStringer/Multi-beam
Total Length361.9 ft (110.3 m)
Max Span29.9 ft (9.1 m)
Deck Width18.0 ft (5.5 m)
Deck Area606.6 sq m
Main Spans12
Year Built1950

Traffic

Avg Daily Traffic10,579 (2020)
Truck Traffic4%
Lanes On Bridge1

Inspection & Ownership

Last InspectionMarch 2023
Inspection FrequencyEvery 24 months
OwnerCity/Municipal Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour CriticalNot applicable
Structure Number07206 01WX00100

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.

Nearby Bridges