Structure 13946 · Madison County, ID

SH 33 over Canyon Creek

Carries SH 33 over Canyon Creek, 8.8 E. Newdale.

Overall conditionGood

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

How ratings work
Decksets the rating7/9 · Good
Superstructure8/9 · Very Good
Substructure8/9 · Very Good
Channelnot part of overall9/9 · Excellent
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT380 FT OVERALL50 FT0ELEVATION · LENGTHS TO SCALE
Deck 7/9 · sets the ratingSuperstructure 8/9Substructure 8/9

380 ft end to end, longest span 212 ft: about 5 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.

Built200620 years old
Length379.9 ft115.8 m
Daily traffic3,500counted 2023
Last inspectedJuly 2024every 48 months

Location

StateIdaho
CountyMadison
Location8.8 E. Newdale
CarriesSH 33
CrossesCanyon Creek
Coordinates43.84800, -111.44756

Physical Characteristics

MaterialSteel Continuous
DesignStringer/Multi-beam
Total Length379.9 ft (115.8 m)
Max Span211.9 ft (64.6 m)
Deck Width42.0 ft (12.8 m)
Deck Area1482.2 sq m
Main Spans3
Year Built2006

Traffic

Avg Daily Traffic3,500 (2023)
Truck Traffic8%
Lanes On Bridge2

Inspection & Ownership

Last InspectionJuly 2024
Inspection FrequencyEvery 48 months
OwnerState Highway Agency
Historical SignificanceHistorical significance is not determined
Scour Critical9 — Foundation above flood level
Structure Number000000000013946

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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