Structure 21384 000 00352 · Clackamas County, OR

Dickey Prairie RD over N Fork Molalla

Carries Dickey Prairie RD over N Fork Molalla, 5 Mi S Jct Feyer Park RD.

Overall conditionGood

Set by its lowest-rated component: Deck and Superstructure and Substructure at 7 of 9.

How ratings work
Decksets the rating7/9 · Good
Superstructuresets the rating7/9 · Good
Substructuresets the rating7/9 · Good
Channelnot part of overall8/9 · Very Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT161 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 7/9Superstructure 7/9Substructure 7/9

161 ft end to end: about 2 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.

Built201115 years old
Length161.1 ft49.1 m
Daily traffic432counted 2020
Last inspectedApril 2023every 24 months

Location

StateOregon
CountyClackamas
Location5 Mi S Jct Feyer Park RD
CarriesDickey Prairie RD
CrossesN Fork Molalla
Coordinates45.08380, -122.48880

Physical Characteristics

MaterialSteel
DesignStringer/Multi-beam
Total Length161.1 ft (49.1 m)
Max Span155.8 ft (47.5 m)
Deck Width37.1 ft (11.3 m)
Deck Area554.8 sq m
Main Spans1
Year Built2011

Traffic

Avg Daily Traffic432 (2020)
Truck Traffic14%
Lanes On Bridge2

Inspection & Ownership

Last InspectionApril 2023
Inspection FrequencyEvery 24 months
OwnerCounty Highway Agency
Historical SignificanceHistorical significance is not determined
Scour Critical5 — Stable for scour
Structure Number21384 000 00352

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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