Structure 60804000001025 · Okanogan County, WA

Buttermilk Butte over East Fork Buttermilk CR

Carries Buttermilk Butte over East Fork Buttermilk CR, No Data Entered.

Overall conditionFair

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

How ratings work
Deck7/9 · Good
Superstructure6/9 · Satisfactory
Substructuresets the rating5/9 · Fair
Channelnot part of overall8/9 · Very Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT42 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 7/9Superstructure 6/9Substructure 5/9 · sets the rating

42 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 multi-beam bridge.

Built199234 years old
Length42.0 ft12.8 m
Daily traffic15counted 1992
Last inspectedJuly 2023every 24 months

Location

StateWashington
CountyOkanogan
LocationNo Data Entered
CarriesButtermilk Butte
CrossesEast Fork Buttermilk CR
Coordinates48.29472, -120.31619

Physical Characteristics

MaterialWood or Timber
DesignStringer/Multi-beam
Total Length42.0 ft (12.8 m)
Max Span40.0 ft (12.2 m)
Deck Width16.1 ft (4.9 m)
Deck Area62.7 sq m
Main Spans1
Year Built1992

Traffic

Avg Daily Traffic15 (1992)
Lanes On Bridge1

Inspection & Ownership

Last InspectionJuly 2023
Inspection FrequencyEvery 24 months
OwnerU.S. Forest Service
Historical SignificanceHistorical significance is not determined
Scour Critical5 — Stable for scour
Structure Number060804000001025

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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