Structure 2724 774 00012 · Wallowa County, OR

West Wallowa AVE over Wrenn Dobbin Ditch

Carries West Wallowa AVE over Wrenn Dobbin Ditch, 0.1 Mi W Of HWY 82.

Overall conditionPoor

Set by its lowest-rated component: Superstructure at 3 of 9.

How ratings work
Deck8/9 · Very Good
Superstructuresets the rating3/9 · Serious
Substructure6/9 · Satisfactory
Channelnot part of overall6/9 · Satisfactory
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
25 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 8/9Superstructure 3/9 · sets the ratingSubstructure 6/9

25 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 multi-beam bridge.

Built194284 years old
Length24.9 ft7.6 m
Daily traffic940counted 2020
Last inspectedSeptember 2024every 12 months

Location

StateOregon
CountyWallowa
Location0.1 Mi W Of HWY 82
CarriesWest Wallowa AVE
CrossesWrenn Dobbin Ditch
Coordinates45.35431, -117.23222

Physical Characteristics

MaterialWood or Timber
DesignStringer/Multi-beam
Total Length24.9 ft (7.6 m)
Max Span23.0 ft (7 m)
Deck Width36.1 ft (11 m)
Deck Area83.6 sq m
Main Spans1
Year Built1942

Traffic

Avg Daily Traffic940 (2020)
Truck Traffic15%
Lanes On Bridge2

Inspection & Ownership

Last InspectionSeptember 2024
Inspection FrequencyEvery 12 months
OwnerCity/Municipal Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical4 — Foundations need monitoring
Structure Number02724 774 00012

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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