Structure 32275 · Jefferson County, ID

E 300 N over Drybed Canal;e.grover Br

Carries E 300 N over Drybed Canal;e.grover Br, 5.6 E. Rigby.

Overall conditionFair

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

How ratings work
Decksets the rating6/9 · Satisfactory
Superstructuresets the rating6/9 · Satisfactory
Substructuresets the rating6/9 · Satisfactory
Channelnot part of overall7/9 · Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT97 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 6/9Superstructure 6/9Substructure 6/9

97 ft end to end, longest span 47 ft. 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 tee-beam bridge.

Built197749 years old
Length96.8 ft29.5 m
Daily traffic400counted 2023
Last inspectedMarch 2024every 24 months

Location

StateIdaho
CountyJefferson
Location5.6 E. Rigby
CarriesE 300 N
CrossesDrybed Canal;e.grover Br
Coordinates43.67022, -111.80139

Physical Characteristics

MaterialPrestressed Concrete
DesignTee Beam
Total Length96.8 ft (29.5 m)
Max Span46.9 ft (14.3 m)
Deck Width30.2 ft (9.2 m)
Deck Area271.4 sq m
Main Spans2
Year Built1977

Traffic

Avg Daily Traffic400 (2023)
Truck Traffic14%
Lanes On Bridge2

Inspection & Ownership

Last InspectionMarch 2024
Inspection FrequencyEvery 24 months
OwnerCounty Highway Agency
Historical SignificanceHistorical significance is not determined
Scour CriticalUnknown
Structure Number000000000032275

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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