Structure 6329 000 00001 · Clackamas County, OR

Bonney RD (1) over Milk Creek

Carries Bonney RD (1) over Milk Creek, 00.0 Mi S Of HWY 211.

Overall conditionFair

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

How ratings work
Deck7/9 · Good
Superstructure7/9 · Good
Substructuresets the rating6/9 · Satisfactory
Channelnot part of overall7/9 · Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
24 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 7/9Superstructure 7/9Substructure 6/9 · sets the rating

24 ft end to end. Lengths are drawn to scale; at this length a semi-truck would be a speck. 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 channel-beam bridge.

Built195868 years old
Length23.6 ft7.2 m
Daily traffic185counted 2020
Last inspectedApril 2023every 24 months

Location

StateOregon
CountyClackamas
Location00.0 Mi S Of HWY 211
CarriesBonney RD (1)
CrossesMilk Creek
Coordinates45.18583, -122.41063

Physical Characteristics

MaterialConcrete
DesignChannel Beam
Total Length23.6 ft (7.2 m)
Max Span23.0 ft (7 m)
Deck Width26.6 ft (8.1 m)
Deck Area58.3 sq m
Main Spans1
Year Built1958

Traffic

Avg Daily Traffic185 (2020)
Truck Traffic5%
Lanes On Bridge2

Inspection & Ownership

Last InspectionApril 2023
Inspection FrequencyEvery 24 months
OwnerCounty Highway Agency
Historical SignificanceHistorical significance is not determined
Scour Critical3 — Scour critical
Structure Number06329 000 00001

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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