Structure 27330 · Canyon County, ID

Stc8317;lansing RD over Willow Creek

Carries Stc8317;lansing RD over Willow Creek, 2.8 N. 2.4 E. Middleton.

Overall conditionFair

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

How ratings work
Decksets the rating5/9 · Fair
Superstructuresets the rating5/9 · Fair
Substructure6/9 · Satisfactory
Channelnot part of overall5/9 · Fair
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT27 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 5/9 · sets the ratingSuperstructure 5/9 · sets the ratingSubstructure 6/9

27 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 rigid-frame bridge.

Built198937 years old
Length26.9 ft8.2 m
Daily traffic2,400counted 2023
Last inspectedNovember 2023every 24 months

Location

StateIdaho
CountyCanyon
Location2.8 N. 2.4 E. Middleton
CarriesStc8317;lansing RD
CrossesWillow Creek
Coordinates43.74636, -116.57267

Physical Characteristics

MaterialConcrete
DesignFrame
Total Length26.9 ft (8.2 m)
Max Span26.9 ft (8.2 m)
Deck Width32.2 ft (9.8 m)
Deck Area80.4 sq m
Main Spans1
Year Built1989

Traffic

Avg Daily Traffic2,400 (2023)
Truck Traffic5%
Lanes On Bridge2

Inspection & Ownership

Last InspectionNovember 2023
Inspection FrequencyEvery 24 months
OwnerOther Local Agencies
Historical SignificanceHistorical significance is not determined
Scour Critical5 — Stable for scour
Structure Number000000000027330

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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