Structure 6683D01WX00044 · Multnomah County, OR

Or 99w/holladay Rp over B-146 Steel Br Rp X Uprr

Carries Or 99w/holladay Rp over B-146 Steel Br Rp X Uprr, NE End Of Steel Bridge.

Overall conditionFair

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

How ratings work
Decksets the rating6/9 · Satisfactory
Superstructuresets the rating6/9 · Satisfactory
Substructure7/9 · Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT318 FT OVERALL50 FT0ELEVATION · LENGTHS TO SCALE
Deck 6/9 · sets the ratingSuperstructure 6/9 · sets the ratingSubstructure 7/9

318 ft end to end, longest span 101 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 tee-beam bridge.

Built1952rebuilt 1985
Length317.9 ft96.9 m
Daily traffic8,742counted 2020
Last inspectedJune 2023every 24 months

Location

StateOregon
CountyMultnomah
LocationNE End Of Steel Bridge
CarriesOr 99w/holladay Rp
CrossesB-146 Steel Br Rp X Uprr
Coordinates45.52880, -122.66714

Physical Characteristics

MaterialConcrete Continuous
DesignTee Beam
Total Length317.9 ft (96.9 m)
Max Span101.0 ft (30.8 m)
Deck Width40.0 ft (12.2 m)
Deck Area1182.2 sq m
Main Spans6
Year Built1952 (reconstructed 1985)

Traffic

Avg Daily Traffic8,742 (2020)
Truck Traffic7%
Lanes On Bridge1

Inspection & Ownership

Last InspectionJune 2023
Inspection FrequencyEvery 24 months
OwnerCity/Municipal Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour CriticalNot applicable
Structure Number06683D01WX00044

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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