US Bridges

US 93 over Wildlife Underpass

Good

Ravalli County, Montana · 3M N Stevensville · Structure no. P00007069+06681

Built
2005
20 years old
Condition
Good
inspected June 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
115 ft
1 main span
Daily traffic
11,313
2023 count
Owner
State
State Highway Agency

About this bridge

US 93 over Wildlife Underpass is a prestressed concrete stringer/multi-beam or girder carrying US 93 over Wildlife Underpass in Ravalli County, Montana. It was built in 2005, so it is 20 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 11,313 vehicles a day, roughly 2% of them trucks, projected to reach 11,879 by 2043. The structure is 115 ft (35 m) long and 76 ft wide. If it were closed, the detour would be 123.7 mi (199 km).

CarriesUS 93
CrossesWildlife Underpass
Location3M N Stevensville
RouteU.S. Route 93
StateMontana
Coordinates46.56423, -114.10458
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
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Last inspectionJune 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating81 US tons
Inventory rating47 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length115 ft (35 m)
Longest span115 ft (35 m)
Deck width76 ft (23.2 m)
Roadway width70 ft (21.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic11,313 (2023)
Projected traffic11,879 by 2043
Trucks2%
Lanes on structure4
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 2005, making it 20 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 June 2023.

How much traffic does US 93 over Wildlife Underpass carry?

About 11,313 vehicles per day (2023 count), of which roughly 2% are trucks.

How long is US 93 over Wildlife Underpass?

The structure is 115 ft (35 m) long with a longest span of 115 ft (35 m) and a deck 76 ft wide.

Who owns US 93 over Wildlife Underpass?

It is owned by the State Highway Agency.