Structure 87452000000000 · King County, WA

Newhalem Ph Road over Newhalem Creek

Carries Newhalem Ph Road over Newhalem Creek, Newhalem Powerhouse.

Overall conditionPoor

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

How ratings work
Deck6/9 · Satisfactory
Superstructuresets the rating4/9 · Poor
Substructure5/9 · Fair
Channelnot part of overall5/9 · Fair
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT79 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 6/9Superstructure 4/9 · sets the ratingSubstructure 5/9

79 ft end to end. Lengths and the car 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.

Built196858 years old
Length79.1 ft24.1 m
Daily traffic65counted 2022
Last inspectedAugust 2022every 24 months

Location

StateWashington
CountyKing
LocationNewhalem Powerhouse
CarriesNewhalem Ph Road
CrossesNewhalem Creek
Coordinates48.66921, -121.25561

Physical Characteristics

MaterialSteel
DesignGirder and Floorbeam
Total Length79.1 ft (24.1 m)
Max Span79.1 ft (24.1 m)
Deck Width15.1 ft (4.6 m)
Deck Area110.9 sq m
Main Spans1
Year Built1968

Traffic

Avg Daily Traffic65 (2022)
Truck Traffic10%
Lanes On Bridge1

Inspection & Ownership

Last InspectionAugust 2022
Inspection FrequencyEvery 24 months
OwnerOther Local Agencies
Historical SignificanceHistorical significance is not determined
Scour Critical4 — Foundations need monitoring
Structure Number087452000000000

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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