Structure LR0000000 · Douglas County, WA

SR 17 over Columbia River

Carries SR 17 over Columbia River, 0.1 N Jct SR 173.

Overall conditionFair

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

How ratings work
Decksets the rating6/9 · Satisfactory
Superstructuresets the rating6/9 · Satisfactory
Substructuresets the rating6/9 · Satisfactory
Channelnot part of overall8/9 · Very Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT1,150 FT OVERALL250 FT0ELEVATION · LENGTHS TO SCALE
Deck 6/9Superstructure 6/9Substructure 6/9

1,150 ft end to end, longest span 300 ft: about 3.2 football fields. 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 deck truss.

Built195076 years old
Length1149.9 ft350.5 m
Daily traffic2,645counted 2023
Last inspectedAugust 2023every 24 months

Location

StateWashington
CountyDouglas
Location0.1 N Jct SR 173
CarriesSR 17
CrossesColumbia River
Coordinates47.99973, -119.65586

Physical Characteristics

MaterialSteel Continuous
DesignTruss - Deck
Total Length1149.9 ft (350.5 m)
Max Span299.9 ft (91.4 m)
Deck Width33.5 ft (10.2 m)
Deck Area3575.1 sq m
Main Spans3
Year Built1950

Traffic

Avg Daily Traffic2,645 (2023)
Truck Traffic15%
Lanes On Bridge2

Inspection & Ownership

Last InspectionAugust 2023
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is on the National Register of Historic Places
Scour Critical8 — Stable, low risk
Structure Number000000LR0000000

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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