Structure 13986A0000000 · Cowlitz County, WA

SR 504 over SR 504 Turnaround

Carries SR 504 over SR 504 Turnaround, 21.9 E Jct SR 504 Sp.

Overall conditionGood

Set by its lowest-rated component: Deck and Superstructure and Substructure at 7 of 9.

How ratings work
Decksets the rating7/9 · Good
Superstructuresets the rating7/9 · Good
Substructuresets the rating7/9 · Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT115 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 7/9Superstructure 7/9Substructure 7/9

115 ft end to end. 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.

Built199234 years old
Length115.2 ft35.1 m
Daily traffic585counted 2023
Last inspectedApril 2024every 24 months

Location

StateWashington
CountyCowlitz
Location21.9 E Jct SR 504 Sp
CarriesSR 504
CrossesSR 504 Turnaround
Coordinates46.30107, -122.26844

Physical Characteristics

MaterialPrestressed Concrete
DesignStringer/Multi-beam
Total Length115.2 ft (35.1 m)
Max Span109.9 ft (33.5 m)
Deck Width35.1 ft (10.7 m)
Deck Area375.6 sq m
Main Spans1
Year Built1992

Traffic

Avg Daily Traffic585 (2023)
Truck Traffic7%
Lanes On Bridge2
Lanes Under Bridge2

Inspection & Ownership

Last InspectionApril 2024
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceHistorical significance is not determined
Scour CriticalNot applicable
Structure Number0013986A0000000

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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