Structure 30895 · Shoshone County, ID

County Road over I 90;smelterville Ic

Carries County Road over I 90;smelterville Ic, 0.3 N. 0.1 W.smelterville.

Overall conditionFair

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

How ratings work
Decksets the rating6/9 · Satisfactory
Superstructuresets the rating6/9 · Satisfactory
Substructuresets the rating6/9 · Satisfactory
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT176 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 6/9Superstructure 6/9Substructure 6/9

176 ft end to end, longest span 52 ft: about 2 semi-trucks nose to tail. 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 multi-beam bridge.

Built196462 years old
Length175.9 ft53.6 m
Daily traffic3,800counted 2023
Last inspectedApril 2021every 48 months

Location

StateIdaho
CountyShoshone
Location0.3 N. 0.1 W.smelterville
CarriesCounty Road
CrossesI 90;smelterville Ic
Coordinates47.54642, -116.17531

Physical Characteristics

MaterialPrestressed Concrete
DesignStringer/Multi-beam
Total Length175.9 ft (53.6 m)
Max Span51.8 ft (15.8 m)
Deck Width32.8 ft (10 m)
Deck Area536 sq m
Main Spans4
Year Built1964

Traffic

Avg Daily Traffic3,800 (2023)
Lanes On Bridge2
Lanes Under Bridge4

Inspection & Ownership

Last InspectionApril 2021
Inspection FrequencyEvery 48 months
OwnerState Highway Agency
Historical SignificanceHistorical significance is not determined
Scour CriticalNot applicable
Structure Number000000000030895

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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