Structure 17180 · Shoshone County, ID

I 90 Ebl over Stc 5766;johnson St.gs

Carries I 90 Ebl over Stc 5766;johnson St.gs, In Osburn;johnson Street.

Overall conditionFair

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

How ratings work
Deck6/9 · Satisfactory
Superstructure6/9 · Satisfactory
Substructuresets the rating5/9 · Fair
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT100 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 6/9Superstructure 6/9Substructure 5/9 · sets the rating

100 ft end to end, longest span 38 ft. 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 tee-beam bridge.

Built196957 years old
Length100.1 ft30.5 m
Daily traffic6,250counted 2023
Last inspectedApril 2023every 24 months

Location

StateIdaho
CountyShoshone
LocationIn Osburn;johnson Street
CarriesI 90 Ebl
CrossesStc 5766;johnson St.gs
Coordinates47.51315, -116.02398

Physical Characteristics

MaterialConcrete
DesignTee Beam
Total Length100.1 ft (30.5 m)
Max Span38.1 ft (11.6 m)
Deck Width40.4 ft (12.3 m)
Deck Area375.1 sq m
Main Spans3
Year Built1969

Traffic

Avg Daily Traffic6,250 (2023)
Truck Traffic23%
Lanes On Bridge2
Lanes Under Bridge2

Inspection & Ownership

Last InspectionApril 2023
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceHistorical significance is not determined
Scour CriticalNot applicable
Structure Number000000000017180

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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