Structure 81247000000000 · Klickitat County, WA

Mt. Adams Rd. over White Salmon River

Carries Mt. Adams Rd. over White Salmon River, 1.4 N Jct SR 141.

Overall conditionFair

Set by its lowest-rated component: Deck at 6 of 9.

How ratings work
Decksets the rating6/9 · Satisfactory
Superstructure7/9 · Good
Substructure7/9 · Good
Channelnot part of overall6/9 · Satisfactory
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT85 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 6/9 · sets the ratingSuperstructure 7/9Substructure 7/9

85 ft end to end, longest span 50 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 tee-beam bridge.

Built195868 years old
Length85.0 ft25.9 m
Daily traffic199counted 2023
Last inspectedSeptember 2024every 24 months

Location

StateWashington
CountyKlickitat
Location1.4 N Jct SR 141
CarriesMt. Adams Rd.
CrossesWhite Salmon River
Coordinates46.01550, -121.52800

Physical Characteristics

MaterialConcrete Continuous
DesignTee Beam
Total Length85.0 ft (25.9 m)
Max Span49.9 ft (15.2 m)
Deck Width30.5 ft (9.3 m)
Deck Area240.9 sq m
Main Spans3
Year Built1958

Traffic

Avg Daily Traffic199 (2023)
Truck Traffic59%
Lanes On Bridge2

Inspection & Ownership

Last InspectionSeptember 2024
Inspection FrequencyEvery 24 months
OwnerCounty Highway Agency
Historical SignificanceHistorical significance is not determined
Scour CriticalUnknown
Structure Number081247000000000

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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