Structure 11356 · Bingham County, ID

I 15 Nbl & Sbl over Ross Fork Creek

Carries I 15 Nbl & Sbl over Ross Fork Creek, 10.4 N. Pocatello.

Overall conditionGood

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

How ratings work
Culvertsets the rating9/9 · Excellent
Channelnot part of overall8/9 · Very Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT26 FT ACROSS25 FT0ELEVATION · LENGTHS TO SCALE
Culvert 9/9

A culvert 26 ft across. 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, so those are drawn as typical for a culvert.

Built20233 years old
Length25.9 ft7.9 m
Daily traffic29,000counted 2023
Last inspectedOctober 2023every 24 months

Location

StateIdaho
CountyBingham
Location10.4 N. Pocatello
CarriesI 15 Nbl & Sbl
CrossesRoss Fork Creek
Coordinates43.02092, -112.40811

Physical Characteristics

MaterialConcrete
DesignCulvert
Total Length25.9 ft (7.9 m)
Max Span12.1 ft (3.7 m)
Deck Width482.9 ft (147.2 m)
Deck Area1162.9 sq m
Main Spans1
Year Built2023

Traffic

Avg Daily Traffic29,000 (2023)
Truck Traffic17%
Lanes On Bridge6

Inspection & Ownership

Last InspectionOctober 2023
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceHistorical significance is not determined
Scour Critical8 — Stable, low risk
Structure Number000000000011356

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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