Structure 8855D0000000 · Walla Walla County, WA

US 12 over WB Off Ramp

Carries US 12 over WB Off Ramp, 5.6 E Jct SR 125 Spur.

Overall conditionPoor

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

How ratings work
Decksets the rating3/9 · Serious
Superstructure6/9 · Satisfactory
Substructure7/9 · Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT474 FT OVERALL100 FT0ELEVATION · LENGTHS TO SCALE
Deck 3/9 · sets the ratingSuperstructure 6/9Substructure 7/9

474 ft end to end, longest span 140 ft: about 7 semi-trucks nose to tail. Lengths and the semi-truck 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 multi-beam bridge.

Built197155 years old
Length474.1 ft144.5 m
Daily traffic4,350counted 2023
Last inspectedMarch 2024every 24 months

Location

StateWashington
CountyWalla Walla
Location5.6 E Jct SR 125 Spur
CarriesUS 12
CrossesWB Off Ramp
Coordinates46.08786, -118.26112

Physical Characteristics

MaterialSteel Continuous
DesignStringer/Multi-beam
Total Length474.1 ft (144.5 m)
Max Span140.1 ft (42.7 m)
Deck Width45.6 ft (13.9 m)
Deck Area2008.5 sq m
Main Spans4
Year Built1971

Traffic

Avg Daily Traffic4,350 (2023)
Truck Traffic13%
Lanes On Bridge2
Lanes Under Bridge1

Inspection & Ownership

Last InspectionMarch 2024
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour CriticalNot applicable
Structure Number0008855D0000000

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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