Structure 19116 · Power County, ID

S1720;n Plsnt Vly over Aberdeen Springfield Cnl

Carries S1720;n Plsnt Vly over Aberdeen Springfield Cnl, 4.1 N. 2 W American Falls.

Overall conditionGood

Set by its lowest-rated component: Deck and Superstructure and Substructure at 8 of 9.

How ratings work
Decksets the rating8/9 · Very Good
Superstructuresets the rating8/9 · Very Good
Substructuresets the rating8/9 · Very Good
Channelnot part of overall8/9 · Very Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT50 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 8/9Superstructure 8/9Substructure 8/9

50 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 box-beam bridge.

Built201412 years old
Length49.9 ft15.2 m
Daily traffic1,100counted 2023
Last inspectedMarch 2021every 48 months

Location

StateIdaho
CountyPower
Location4.1 N. 2 W American Falls
CarriesS1720;n Plsnt Vly
CrossesAberdeen Springfield Cnl
Coordinates42.84889, -112.90167

Physical Characteristics

MaterialConcrete
DesignBox Beam - Multiple
Total Length49.9 ft (15.2 m)
Max Span48.9 ft (14.9 m)
Deck Width36.1 ft (11 m)
Deck Area167.2 sq m
Main Spans1
Year Built2014

Traffic

Avg Daily Traffic1,100 (2023)
Truck Traffic7%
Lanes On Bridge2

Inspection & Ownership

Last InspectionMarch 2021
Inspection FrequencyEvery 48 months
OwnerCounty Highway Agency
Historical SignificanceHistorical significance is not determined
Scour Critical8 — Stable, low risk
Structure Number000000000019116

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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