Structure 26840 · Canyon County, ID

Emerald Road over Deer Flat High Line Cnl

Carries Emerald Road over Deer Flat High Line Cnl, 4.7 S. 3.0 W. Nampa.

Overall conditionFair

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

How ratings work
Decksets the rating6/9 · Satisfactory
Superstructuresets the rating6/9 · Satisfactory
Substructure7/9 · Good
Channelnot part of overall7/9 · Good
0 failed4 poor6 fair9 excellent

Elevation

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

22 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.

Built198838 years old
Length22.0 ft6.7 m
Daily traffic300counted 2023
Last inspectedMarch 2024every 24 months

Location

StateIdaho
CountyCanyon
Location4.7 S. 3.0 W. Nampa
CarriesEmerald Road
CrossesDeer Flat High Line Cnl
Coordinates43.51017, -116.62097

Physical Characteristics

MaterialConcrete
DesignFrame
Total Length22.0 ft (6.7 m)
Max Span22.0 ft (6.7 m)
Deck Width50.2 ft (15.3 m)
Deck Area102.5 sq m
Main Spans1
Year Built1988

Traffic

Avg Daily Traffic300 (2023)
Truck Traffic10%
Lanes On Bridge2

Inspection & Ownership

Last InspectionMarch 2024
Inspection FrequencyEvery 24 months
OwnerOther Local Agencies
Historical SignificanceHistorical significance is not determined
Scour Critical8 — Stable, low risk
Structure Number000000000026840

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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