Structure 60506000001321 · King County, WA

Road over E Fk Miller River

Carries Road over E Fk Miller River, 3.7 Mi S Of 6410/hwy Jct.

Overall conditionFair

Set by its lowest-rated component: Superstructure and Substructure at 6 of 9.

How ratings work
Deck7/9 · Good
Superstructuresets the rating6/9 · Satisfactory
Substructuresets the rating6/9 · Satisfactory
Channelnot part of overall8/9 · Very Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT130 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 7/9Superstructure 6/9 · sets the ratingSubstructure 6/9 · sets the rating

130 ft end to end, longest span 85 ft. 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 rigid-frame bridge.

Built1964rebuilt 2010
Length129.9 ft39.6 m
Daily traffic44counted 1982
Last inspectedOctober 2022every 48 months

Location

StateWashington
CountyKing
Location3.7 Mi S Of 6410/hwy Jct
CarriesRoad
CrossesE Fk Miller River
Coordinates47.65098, -121.37295

Physical Characteristics

MaterialConcrete Continuous
DesignFrame
Total Length129.9 ft (39.6 m)
Max Span85.0 ft (25.9 m)
Deck Width19.0 ft (5.8 m)
Deck Area229.7 sq m
Main Spans3
Year Built1964 (reconstructed 2010)

Traffic

Avg Daily Traffic44 (1982)
Lanes On Bridge1

Inspection & Ownership

Last InspectionOctober 2022
Inspection FrequencyEvery 48 months
OwnerU.S. Forest Service
Historical SignificanceHistorical significance is not determined
Scour Critical5 — Stable for scour
Structure Number060506000001321

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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