Structure 11958 090300060 · Linn County, OR

Upper Berlin RD over Hamilton Creek

Carries Upper Berlin RD over Hamilton Creek, 006 Mi E CR 20b Inter.

Overall conditionPoor

Set by its lowest-rated component: Substructure at 4 of 9.

How ratings work
Deck7/9 · Good
Superstructure7/9 · Good
Substructuresets the rating4/9 · Poor
Channelnot part of overall4/9 · Poor
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT64 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 7/9Superstructure 7/9Substructure 4/9 · sets the rating

64 ft end to end, longest span 31 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 slab bridge.

Built197155 years old
Length64.0 ft19.5 m
Daily traffic360counted 2021
Last inspectedJune 2024every 24 months

Location

StateOregon
CountyLinn
Location006 Mi E CR 20b Inter
CarriesUpper Berlin RD
CrossesHamilton Creek
Coordinates44.50105, -122.72904

Physical Characteristics

MaterialPrestressed Concrete
DesignSlab
Total Length64.0 ft (19.5 m)
Max Span30.8 ft (9.4 m)
Deck Width28.2 ft (8.6 m)
Deck Area167.7 sq m
Main Spans2
Year Built1971

Traffic

Avg Daily Traffic360 (2021)
Truck Traffic10%
Lanes On Bridge2

Inspection & Ownership

Last InspectionJune 2024
Inspection FrequencyEvery 24 months
OwnerCounty Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour CriticalUnknown
Structure Number11958 090300060

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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