Structure 59C458052500743 · Umatilla County, OR

Walla Walla Rv RD over N Fork Walla Walla River

Carries Walla Walla Rv RD over N Fork Walla Walla River, 5.1 Mi SE Of HWY 11.

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 overall5/9 · Fair
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT73 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 8/9Superstructure 8/9Substructure 7/9 · sets the rating

73 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 box-beam bridge.

Built197551 years old
Length73.2 ft22.3 m
Daily traffic398counted 2020
Last inspectedJuly 2023every 24 months

Location

StateOregon
CountyUmatilla
Location5.1 Mi SE Of HWY 11
CarriesWalla Walla Rv RD
CrossesN Fork Walla Walla River
Coordinates45.90047, -118.29726

Physical Characteristics

MaterialPrestressed Concrete
DesignBox Beam - Multiple
Total Length73.2 ft (22.3 m)
Max Span70.9 ft (21.6 m)
Deck Width32.2 ft (9.8 m)
Deck Area218.5 sq m
Main Spans1
Year Built1975

Traffic

Avg Daily Traffic398 (2020)
Truck Traffic10%
Lanes On Bridge2

Inspection & Ownership

Last InspectionJuly 2023
Inspection FrequencyEvery 24 months
OwnerCounty Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour CriticalUnknown
Structure Number59C458052500743

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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