Structure 24250 · Cassia County, ID

Idahome Road over I 84 Eb-wb;idahome RD Gs

Carries Idahome Road over I 84 Eb-wb;idahome RD Gs, 8.2 W. Sublett.

Overall conditionFair

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

How ratings work
Deck7/9 · Good
Superstructure7/9 · Good
Substructuresets the rating6/9 · Satisfactory
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT312 FT OVERALL50 FT0ELEVATION · LENGTHS TO SCALE
Deck 7/9Superstructure 7/9Substructure 6/9 · sets the rating

312 ft end to end, longest span 69 ft: about 4 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.

Built196759 years old
Length312.0 ft95.1 m
Daily traffic1,700counted 2023
Last inspectedApril 2023every 48 months

Location

StateIdaho
CountyCassia
Location8.2 W. Sublett
CarriesIdahome Road
CrossesI 84 Eb-wb;idahome RD Gs
Coordinates42.41550, -113.32014

Physical Characteristics

MaterialPrestressed Concrete
DesignStringer/Multi-beam
Total Length312.0 ft (95.1 m)
Max Span68.9 ft (21 m)
Deck Width33.1 ft (10.1 m)
Deck Area960.5 sq m
Main Spans5
Year Built1967

Traffic

Avg Daily Traffic1,700 (2023)
Truck Traffic1%
Lanes On Bridge2
Lanes Under Bridge4

Inspection & Ownership

Last InspectionApril 2023
Inspection FrequencyEvery 48 months
OwnerState Highway Agency
Historical SignificanceHistorical significance is not determined
Scour CriticalNot applicable
Structure Number000000000024250

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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