Structure 19393 · Twin Falls County, ID

US 93 over Perrine Coulee;bike Path

Carries US 93 over Perrine Coulee;bike Path, In Twin Falls.

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 overall6/9 · Satisfactory
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT39 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 6/9Superstructure 6/9Substructure 6/9

39 ft end to end. 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 box-beam bridge.

Built200620 years old
Length39.0 ft11.9 m
Daily traffic33,000counted 2023
Last inspectedAugust 2021every 48 months

Location

StateIdaho
CountyTwin Falls
LocationIn Twin Falls
CarriesUS 93
CrossesPerrine Coulee;bike Path
Coordinates42.59191, -114.47159

Physical Characteristics

MaterialPrestressed Concrete
DesignBox Beam - Multiple
Total Length39.0 ft (11.9 m)
Max Span36.1 ft (11 m)
Deck Width140.1 ft (42.7 m)
Deck Area508.1 sq m
Main Spans1
Year Built2006

Traffic

Avg Daily Traffic33,000 (2023)
Truck Traffic6%
Lanes On Bridge6

Inspection & Ownership

Last InspectionAugust 2021
Inspection FrequencyEvery 48 months
OwnerState Highway Agency
Historical SignificanceHistorical significance is not determined
Scour Critical8 — Stable, low risk
Structure Number000000000019393

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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