Structure 23235 · Caribou County, ID

8 Mile Road over Bear River

Carries 8 Mile Road over Bear River, 3.2 S. 4.1 E.soda Springs.

Overall conditionPoor

Set by its lowest-rated component: Superstructure at 3 of 9.

How ratings work
Deck6/9 · Satisfactory
Superstructuresets the rating3/9 · Serious
Substructure5/9 · Fair
Channelnot part of overall8/9 · Very Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT100 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 6/9Superstructure 3/9 · sets the ratingSubstructure 5/9

100 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.

Built197254 years old
Length100.1 ft30.5 m
Daily traffic100counted 2023
Last inspectedApril 2024every 12 months

Location

StateIdaho
CountyCaribou
Location3.2 S. 4.1 E.soda Springs
Carries8 Mile Road
CrossesBear River
Coordinates42.60830, -111.52047

Physical Characteristics

MaterialSteel
DesignStringer/Multi-beam
Total Length100.1 ft (30.5 m)
Max Span96.1 ft (29.3 m)
Deck Width16.1 ft (4.9 m)
Deck Area149.4 sq m
Main Spans1
Year Built1972

Traffic

Avg Daily Traffic100 (2023)
Truck Traffic10%
Lanes On Bridge1

Inspection & Ownership

Last InspectionApril 2024
Inspection FrequencyEvery 12 months
OwnerCounty Highway Agency
Historical SignificanceHistorical significance is not determined
Scour CriticalUnknown
Structure Number000000000023235

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.

Nearby Bridges