Structure 80875000000000 · Columbia County, WA

King Grade over Tucannon River

Carries King Grade over Tucannon River, 00.20 Mi S CR 9233.

Overall conditionPoor

Set by its lowest-rated component: Superstructure at 4 of 9.

How ratings work
Deck5/9 · Fair
Superstructuresets the rating4/9 · Poor
Substructure7/9 · Good
Channelnot part of overall7/9 · Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT79 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 5/9Superstructure 4/9 · sets the ratingSubstructure 7/9

79 ft end to end, longest span 40 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 multi-beam bridge.

Built197452 years old
Length79.1 ft24.1 m
Daily traffic25counted 2019
Last inspectedOctober 2024every 12 months

Location

StateWashington
CountyColumbia
Location00.20 Mi S CR 9233
CarriesKing Grade
CrossesTucannon River
Coordinates46.45474, -117.82139

Physical Characteristics

MaterialWood or Timber
DesignStringer/Multi-beam
Total Length79.1 ft (24.1 m)
Max Span39.7 ft (12.1 m)
Deck Width16.4 ft (5 m)
Deck Area120.5 sq m
Main Spans2
Year Built1974

Traffic

Avg Daily Traffic25 (2019)
Truck Traffic20%
Lanes On Bridge1

Inspection & Ownership

Last InspectionOctober 2024
Inspection FrequencyEvery 12 months
OwnerCounty Highway Agency
Historical SignificanceHistorical significance is not determined
Scour CriticalUnknown
Structure Number080875000000000

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.

Nearby Bridges