Structure 2331D0000000 · Wahkiakum County, WA

SR 4 over Klints Slough

Carries SR 4 over Klints Slough, 14.8 E Jct SR 401.

Overall conditionFair

Set by its lowest-rated component: Substructure at 5 of 9.

How ratings work
Deck6/9 · Satisfactory
Superstructure7/9 · Good
Substructuresets the rating5/9 · Fair
Channelnot part of overall8/9 · Very Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT206 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 6/9Superstructure 7/9Substructure 5/9 · sets the rating

206 ft end to end, longest span 17 ft: about 3 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.

Built193888 years old
Length206.0 ft62.8 m
Daily traffic1,152counted 2023
Last inspectedAugust 2023every 24 months

Location

StateWashington
CountyWahkiakum
Location14.8 E Jct SR 401
CarriesSR 4
CrossesKlints Slough
Coordinates46.35792, -123.56314

Physical Characteristics

MaterialWood or Timber
DesignStringer/Multi-beam
Total Length206.0 ft (62.8 m)
Max Span17.1 ft (5.2 m)
Deck Width30.5 ft (9.3 m)
Deck Area584.0 sq m
Main Spans12
Year Built1938

Traffic

Avg Daily Traffic1,152 (2023)
Truck Traffic11%
Lanes On Bridge2

Inspection & Ownership

Last InspectionAugust 2023
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical5 — Stable for scour
Structure Number0002331D0000000

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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