Structure 14138 · Power County, ID

I 86b over Uprr;amr.falls North Op

Carries I 86b over Uprr;amr.falls North Op, 0.7 N. American Falls.

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 FT414 FT OVERALL50 FT0ELEVATION · LENGTHS TO SCALE
Deck 7/9Superstructure 7/9Substructure 6/9 · sets the rating

414 ft end to end, longest span 153 ft: about 6 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.

Built199234 years old
Length414.0 ft126.2 m
Daily traffic4,100counted 2023
Last inspectedNovember 2022every 48 months

Location

StateIdaho
CountyPower
Location0.7 N. American Falls
CarriesI 86b
CrossesUprr;amr.falls North Op
Coordinates42.79458, -112.85342

Physical Characteristics

MaterialSteel Continuous
DesignStringer/Multi-beam
Total Length414.0 ft (126.2 m)
Max Span152.9 ft (46.6 m)
Deck Width39.7 ft (12.1 m)
Deck Area1527.0 sq m
Main Spans3
Year Built1992

Traffic

Avg Daily Traffic4,100 (2023)
Truck Traffic23%
Lanes On Bridge2

Inspection & Ownership

Last InspectionNovember 2022
Inspection FrequencyEvery 48 months
OwnerState Highway Agency
Historical SignificanceHistorical significance is not determined
Scour CriticalNot applicable
Structure Number000000000014138

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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