Structure 32385 · Jefferson County, ID

E 620 N over Long Island Canal

Carries E 620 N over Long Island Canal, 3.2 N. 1.4 W. Rigby.

Overall conditionFair

Set by its lowest-rated component: Superstructure at 6 of 9.

How ratings work
Deck7/9 · Good
Superstructuresets the rating6/9 · Satisfactory
Substructure7/9 · Good
Channelnot part of overall8/9 · Very Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
24 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 7/9Superstructure 6/9 · sets the ratingSubstructure 7/9

24 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 tee-beam bridge.

Built196759 years old
Length24.0 ft7.3 m
Daily traffic70counted 2023
Last inspectedApril 2024every 24 months

Location

StateIdaho
CountyJefferson
Location3.2 N. 1.4 W. Rigby
CarriesE 620 N
CrossesLong Island Canal
Coordinates43.71875, -111.94294

Physical Characteristics

MaterialPrestressed Concrete
DesignTee Beam
Total Length24.0 ft (7.3 m)
Max Span23.0 ft (7 m)
Deck Width27.9 ft (8.5 m)
Deck Area62.0 sq m
Main Spans1
Year Built1967

Traffic

Avg Daily Traffic70 (2023)
Truck Traffic10%
Lanes On Bridge2

Inspection & Ownership

Last InspectionApril 2024
Inspection FrequencyEvery 24 months
OwnerCounty Highway Agency
Historical SignificanceHistorical significance is not determined
Scour Critical8 — Stable, low risk
Structure Number000000000032385

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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