Structure 9448B0000000 · Clark County, WA

Fourth Plain BLVD over I-205

Carries Fourth Plain BLVD over I-205, 0.3 N Jct SR 500.

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
SEMI-TRUCK · 72 FT483 FT OVERALL100 FT0ELEVATION · LENGTHS TO SCALE
Deck 7/9Superstructure 7/9Substructure 7/9

483 ft end to end, longest span 128 ft: about 7 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 box-beam bridge.

Built197353 years old
Length482.9 ft147.2 m
Daily traffic18,150counted 2012
Last inspectedOctober 2023every 24 months

Location

StateWashington
CountyClark
Location0.3 N Jct SR 500
CarriesFourth Plain BLVD
CrossesI-205
Coordinates45.65892, -122.57389

Physical Characteristics

MaterialConcrete Continuous
DesignBox Beam - Multiple
Total Length482.9 ft (147.2 m)
Max Span128.0 ft (39 m)
Deck Width81.0 ft (24.7 m)
Deck Area3635.8 sq m
Main Spans4
Year Built1973

Traffic

Avg Daily Traffic18,150 (2012)
Truck Traffic10%
Lanes On Bridge4
Lanes Under Bridge9

Inspection & Ownership

Last InspectionOctober 2023
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour CriticalNot applicable
Structure Number0009448B0000000

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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