Structure P00005010+08211 · Missoula County, MT

US 93 over Wildlife Underpass

Carries US 93 over Wildlife Underpass, 11m N Wye Int.

Overall conditionGood

Set by its lowest-rated component: Culvert at 8 of 9.

How ratings work
Culvertsets the rating8/9 · Very Good
Channelnot part of overall9/9 · Excellent
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT26 FT ACROSS25 FT0ELEVATION · LENGTHS TO SCALE
Culvert 8/9

A culvert 26 ft across. 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, so those are drawn as typical for a culvert.

Built200917 years old
Length26.2 ft8 m
Daily traffic9,214counted 2023
Last inspectedFebruary 2025every 24 months

Location

StateMontana
CountyMissoula
Location11m N Wye Int
CarriesUS 93
CrossesWildlife Underpass
Coordinates47.07809, -114.04545

Physical Characteristics

MaterialSteel
DesignCulvert
Total Length26.2 ft (8 m)
Max Span26.2 ft (8 m)
Deck Area128 sq m
Main Spans1
Year Built2009

Traffic

Avg Daily Traffic9,214 (2023)
Truck Traffic4%
Lanes On Bridge3

Inspection & Ownership

Last InspectionFebruary 2025
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical8 — Stable, low risk
Structure NumberP00005010+08211

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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