Structure 24575 · Jerome County, ID

Frontage Road over N Canal

Carries Frontage Road over N Canal, 0.6 S. 0.9 W. Jerome.

Overall conditionGood

Set by its lowest-rated component: Deck and Superstructure and Substructure at 7 of 9.

How ratings work
Decksets the rating7/9 · Good
Superstructuresets the rating7/9 · Good
Substructuresets the rating7/9 · Good
Channelnot part of overall8/9 · Very Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
25 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 7/9Superstructure 7/9Substructure 7/9

25 ft end to end. Lengths are drawn to scale; at this length a semi-truck would be a speck. 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 rigid-frame bridge.

Built196462 years old
Length24.9 ft7.6 m
Daily traffic170counted 2023
Last inspectedNovember 2022every 48 months

Location

StateIdaho
CountyJerome
Location0.6 S. 0.9 W. Jerome
CarriesFrontage Road
CrossesN Canal
Coordinates42.71451, -114.53648

Physical Characteristics

MaterialConcrete
DesignFrame
Total Length24.9 ft (7.6 m)
Max Span24.9 ft (7.6 m)
Deck Width34.1 ft (10.4 m)
Deck Area79.0 sq m
Main Spans1
Year Built1964

Traffic

Avg Daily Traffic170 (2023)
Truck Traffic13%
Lanes On Bridge2

Inspection & Ownership

Last InspectionNovember 2022
Inspection FrequencyEvery 48 months
OwnerOther Local Agencies
Historical SignificanceHistorical significance is not determined
Scour Critical8 — Stable, low risk
Structure Number000000000024575

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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