Structure 85516000000000 · Lewis County, WA

Chamber Way over Bn Rr & N Natl AVE

Carries Chamber Way over Bn Rr & N Natl AVE, 0.1 E Of Interstate 5.

Overall conditionPoor

Set by its lowest-rated component: Deck at 4 of 9.

How ratings work
Decksets the rating4/9 · Poor
Superstructure5/9 · Fair
Substructure5/9 · Fair
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT376 FT OVERALL50 FT0ELEVATION · LENGTHS TO SCALE
Deck 4/9 · sets the ratingSuperstructure 5/9Substructure 5/9

376 ft end to end: about 5 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 girder bridge.

Built195274 years old
Length376.0 ft114.6 m
Daily traffic13,223counted 2022
Last inspectedSeptember 2024every 24 months

Location

StateWashington
CountyLewis
Location0.1 E Of Interstate 5
CarriesChamber Way
CrossesBn Rr & N Natl AVE
Coordinates46.67375, -122.97153

Physical Characteristics

MaterialSteel
DesignGirder and Floorbeam
Total Length376.0 ft (114.6 m)
Max Span119.1 ft (36.3 m)
Deck Width36.1 ft (11 m)
Deck Area1260.6 sq m
Main Spans1
Year Built1952

Traffic

Avg Daily Traffic13,223 (2022)
Truck Traffic5%
Lanes On Bridge2
Lanes Under Bridge2

Inspection & Ownership

Last InspectionSeptember 2024
Inspection FrequencyEvery 24 months
OwnerCity/Municipal Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour CriticalNot applicable
Structure Number085516000000000

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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