Structure 2912A0000000 · Cowlitz County, WA

SR 503 over Jim Creek

Carries SR 503 over Jim Creek, 8.2 N Jct SR 503 Spur.

Overall conditionPoor

Set by its lowest-rated component: Deck at 3 of 9.

How ratings work
Decksets the rating3/9 · Serious
Superstructure6/9 · Satisfactory
Substructure6/9 · Satisfactory
Channelnot part of overall8/9 · Very Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT308 FT OVERALL50 FT0ELEVATION · LENGTHS TO SCALE
Deck 3/9 · sets the ratingSuperstructure 6/9Substructure 6/9

308 ft end to end: about 4 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 deck arch.

Built194581 years old
Length308.1 ft93.9 m
Daily traffic1,969counted 2023
Last inspectedApril 2024every 24 months

Location

StateWashington
CountyCowlitz
Location8.2 N Jct SR 503 Spur
CarriesSR 503
CrossesJim Creek
Coordinates45.99583, -122.51628

Physical Characteristics

MaterialConcrete
DesignArch - Deck
Total Length308.1 ft (93.9 m)
Max Span179.1 ft (54.6 m)
Deck Width29.9 ft (9.1 m)
Deck Area854.5 sq m
Main Spans1
Year Built1945

Traffic

Avg Daily Traffic1,969 (2023)
Truck Traffic10%
Lanes On Bridge2

Inspection & Ownership

Last InspectionApril 2024
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is on the National Register of Historic Places
Scour Critical9 — Foundation above flood level
Structure Number0002912A0000000

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