Structure 20618 C12300102 · Harney County, OR

IRR C123 West Loop over Silvies River

Carries IRR C123 West Loop over Silvies River, 010 Mi C121 Foley DR.

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 overall6/9 · Satisfactory
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT68 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 7/9Superstructure 7/9Substructure 7/9

68 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 slab bridge.

Built200719 years old
Length67.9 ft20.7 m
Daily traffic180counted 2020
Last inspectedSeptember 2024every 24 months

Location

StateOregon
CountyHarney
Location010 Mi C121 Foley DR
CarriesIRR C123 West Loop
CrossesSilvies River
Coordinates43.63406, -119.07703

Physical Characteristics

MaterialPrestressed Concrete
DesignSlab
Total Length67.9 ft (20.7 m)
Max Span67.9 ft (20.7 m)
Deck Width27.9 ft (8.5 m)
Deck Area175.9 sq m
Main Spans1
Year Built2007

Traffic

Avg Daily Traffic180 (2020)
Truck Traffic10%
Lanes On Bridge2

Inspection & Ownership

Last InspectionSeptember 2024
Inspection FrequencyEvery 24 months
OwnerCounty Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour CriticalUnknown
Structure Number20618 C12300102

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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