Structure 19C452 388 490 · Douglas County, OR

County RD 388 over Cooper Creek

Carries County RD 388 over Cooper Creek, 0.7 Mi S Of Sutherlin.

Overall conditionFair

Set by its lowest-rated component: Substructure at 5 of 9.

How ratings work
Deck7/9 · Good
Superstructure7/9 · Good
Substructuresets the rating5/9 · Fair
Channelnot part of overall5/9 · Fair
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT50 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 7/9Superstructure 7/9Substructure 5/9 · sets the rating

50 ft end to end. 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 tee-beam bridge.

Built1921105 years old
Length49.9 ft15.2 m
Daily traffic6,857counted 2020
Last inspectedApril 2024every 12 months

Location

StateOregon
CountyDouglas
Location0.7 Mi S Of Sutherlin
CarriesCounty RD 388
CrossesCooper Creek
Coordinates43.38008, -123.31790

Physical Characteristics

MaterialConcrete
DesignTee Beam
Total Length49.9 ft (15.2 m)
Max Span48.9 ft (14.9 m)
Deck Width43.0 ft (13.1 m)
Deck Area199.1 sq m
Main Spans1
Year Built1921

Traffic

Avg Daily Traffic6,857 (2020)
Truck Traffic10%
Lanes On Bridge2

Inspection & Ownership

Last InspectionApril 2024
Inspection FrequencyEvery 12 months
OwnerCounty Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour CriticalUnknown
Structure Number19C452 388 490

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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