Structure 8264C0000000 · Clark County, WA

I-5 over Lewis River

Carries I-5 over Lewis River, 5.8 N Jct SR 501.

Overall conditionFair

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

How ratings work
Decksets the rating5/9 · Fair
Superstructure7/9 · Good
Substructure7/9 · Good
Channelnot part of overall8/9 · Very Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT1,076 FT OVERALL200 FT0ELEVATION · LENGTHS TO SCALE
Deck 5/9 · sets the ratingSuperstructure 7/9Substructure 7/9

1,076 ft end to end, longest span 324 ft: about 3.0 football fields. 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 through truss.

Built196858 years old
Length1076.1 ft328 m
Daily traffic41,939counted 2023
Last inspectedMarch 2023every 24 months

Location

StateWashington
CountyClark
Location5.8 N Jct SR 501
CarriesI-5
CrossesLewis River
Coordinates45.88936, -122.73264

Physical Characteristics

MaterialSteel Continuous
DesignTruss - Thru
Total Length1076.1 ft (328 m)
Max Span324.1 ft (98.8 m)
Deck Width51.5 ft (15.7 m)
Deck Area5149.6 sq m
Main Spans3
Year Built1968

Traffic

Avg Daily Traffic41,939 (2023)
Truck Traffic15%
Lanes On Bridge3

Inspection & Ownership

Last InspectionMarch 2023
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical5 — Stable for scour
Structure Number0008264C0000000

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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