Structure 18596 064 01494 · Clackamas County, OR

Monterey AVE over HWY 064

Carries Monterey AVE over HWY 064, 1.63 Mi S Of Portland Scl.

Overall conditionFair

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

How ratings work
Decksets the rating6/9 · Satisfactory
Superstructure7/9 · Good
Substructure7/9 · Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT379 FT OVERALL50 FT0ELEVATION · LENGTHS TO SCALE
Deck 6/9 · sets the ratingSuperstructure 7/9Substructure 7/9

379 ft end to end, longest span 200 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 box-beam bridge.

Built200224 years old
Length378.9 ft115.5 m
Daily traffic58,129counted 2020
Last inspectedMarch 2023every 24 months

Location

StateOregon
CountyClackamas
Location1.63 Mi S Of Portland Scl
CarriesMonterey AVE
CrossesHWY 064
Coordinates45.43836, -122.56794

Physical Characteristics

MaterialPrestressed Concrete Continuous
DesignBox Beam - Multiple
Total Length378.9 ft (115.5 m)
Max Span200.1 ft (61 m)
Deck Width62.7 ft (19.1 m)
Deck Area2206.1 sq m
Main Spans2
Year Built2002

Traffic

Avg Daily Traffic58,129 (2020)
Truck Traffic10%
Lanes On Bridge3
Lanes Under Bridge9

Inspection & Ownership

Last InspectionMarch 2023
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour CriticalNot applicable
Structure Number18596 064 01494

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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