Structure 60605000001606 · Clackamas County, OR

Road over North Fork Clackamas Ri*

Carries Road over North Fork Clackamas Ri*, S-24 T-4s R-5e Wm.

Overall conditionGood

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

How ratings work
Deck8/9 · Very Good
Superstructure8/9 · Very Good
Substructuresets the rating7/9 · Good
Channelnot part of overall7/9 · Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT67 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 8/9Superstructure 8/9Substructure 7/9 · sets the rating

67 ft end to end, longest span 45 ft. Lengths and the car 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 rigid-frame bridge.

Built196957 years old
Length66.9 ft20.4 m
Daily traffic50counted 2006
Last inspectedJuly 2024every 24 months

Location

StateOregon
CountyClackamas
LocationS-24 T-4s R-5e Wm
CarriesRoad
CrossesNorth Fork Clackamas Ri*
Coordinates45.20700, -122.14870

Physical Characteristics

MaterialConcrete Continuous
DesignFrame
Total Length66.9 ft (20.4 m)
Max Span44.9 ft (13.7 m)
Deck Width21.0 ft (6.4 m)
Deck Area130.6 sq m
Main Spans3
Year Built1969

Traffic

Avg Daily Traffic50 (2006)
Lanes On Bridge1

Inspection & Ownership

Last InspectionJuly 2024
Inspection FrequencyEvery 24 months
OwnerU.S. Forest Service
Historical SignificanceHistorical significance is not determined
Scour Critical5 — Stable for scour
Structure Number060605000001606

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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