US Bridges

US 93 over Wildlife Underpass

Good

Missoula County, Montana · 11M N Wye Int · Structure no. P00005010+05211

Built
2009
16 years old
Condition
Good
inspected February 2023
Type
Culvert
Steel
Length
25 ft
1 main span
Daily traffic
9,214
2023 count
Owner
State
State Highway Agency

About this bridge

US 93 over Wildlife Underpass is a steel culvert carrying US 93 over Wildlife Underpass in Missoula County, Montana. It was built in 2009, so it is 16 years old, younger than the Montana average of 47 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 9,214 vehicles a day, roughly 4% of them trucks, projected to reach 9,675 by 2043. The structure is 25 ft (7.7 m) long. If it were closed, the detour would be 123.7 mi (199 km).

CarriesUS 93
CrossesWildlife Underpass
Location11M N Wye Int
RouteU.S. Route 93
StateMontana
Coordinates47.07535, -114.05026
Functional classRural Principal Arterial - Other

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Culvert7 GoodSome minor problems.
Last inspectionFebruary 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating81 US tons
Inventory rating61.9 US tons

Structure

Structure typeCulvert
MaterialSteel
DeckNot applicable
Main spans1
Design loadHS 20
Structure length25 ft (7.7 m)
Longest span25 ft (7.7 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic9,214 (2023)
Projected traffic9,675 by 2043
Trucks4%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesOther
Detour if closed123.7 mi (199 km)
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNot applicable (no waterway)

Frequently asked questions

When was US 93 over Wildlife Underpass built?

It was built in 2009, making it 16 years old in 2025.

What condition is US 93 over Wildlife Underpass in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in February 2023.

How much traffic does US 93 over Wildlife Underpass carry?

About 9,214 vehicles per day (2023 count), of which roughly 4% are trucks.

How long is US 93 over Wildlife Underpass?

The structure is 25 ft (7.7 m) long with a longest span of 25 ft (7.7 m).

Who owns US 93 over Wildlife Underpass?

It is owned by the State Highway Agency.