Structure 16506 001C30686 · Multnomah County, OR

I-5 (hwy 1) Conn over HWY 1 Conn

Carries I-5 (hwy 1) Conn over HWY 1 Conn, 1.5 Mi S Of Interstate Br.

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 FT1,020 FT OVERALL200 FT0ELEVATION · LENGTHS TO SCALE
Deck 6/9Superstructure 6/9Substructure 6/9

1,020 ft end to end, longest span 130 ft: about 2.8 football fields. 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.

Built199135 years old
Length1020.0 ft310.9 m
Daily traffic5,420counted 2022
Last inspectedDecember 2024every 24 months

Location

StateOregon
CountyMultnomah
Location1.5 Mi S Of Interstate Br
CarriesI-5 (hwy 1) Conn
CrossesHWY 1 Conn
Coordinates45.59683, -122.68405

Physical Characteristics

MaterialPrestressed Concrete Continuous
DesignStringer/Multi-beam
Total Length1020.0 ft (310.9 m)
Max Span129.9 ft (39.6 m)
Deck Width28.5 ft (8.7 m)
Deck Area2704.8 sq m
Main Spans7
Year Built1991

Traffic

Avg Daily Traffic5,420 (2022)
Truck Traffic9%
Lanes On Bridge1
Lanes Under Bridge1

Inspection & Ownership

Last InspectionDecember 2024
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour CriticalNot applicable
Structure Number16506 001C30686

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