Structure HN0000000 · Ferry County, WA

SR 21 over San Poil River

Carries SR 21 over San Poil River, 41.9 N Lincoln Co.

Overall conditionFair

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

How ratings work
Deck7/9 · Good
Superstructure7/9 · Good
Substructuresets the rating6/9 · Satisfactory
Channelnot part of overall8/9 · Very Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT61 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 7/9Superstructure 7/9Substructure 6/9 · sets the rating

61 ft end to end, longest span 30 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.

Built192799 years old
Length61.0 ft18.6 m
Daily traffic406counted 2023
Last inspectedAugust 2024every 24 months

Location

StateWashington
CountyFerry
Location41.9 N Lincoln Co
CarriesSR 21
CrossesSan Poil River
Coordinates48.48333, -118.73767

Physical Characteristics

MaterialConcrete
DesignTee Beam
Total Length61.0 ft (18.6 m)
Max Span29.9 ft (9.1 m)
Deck Width23.6 ft (7.2 m)
Deck Area133.9 sq m
Main Spans2
Year Built1927

Traffic

Avg Daily Traffic406 (2023)
Truck Traffic17%
Lanes On Bridge2

Inspection & Ownership

Last InspectionAugust 2024
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical7 — Countermeasures installed
Structure Number000000HN0000000

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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