US Bridges

US 93 over Wildlife Upass-Drainage

Good

Lake County, Montana · 3M N ST Ignatius · Structure no. P00005034+03601

Built
2006
19 years old
Condition
Good
inspected June 2023
Type
Culvert
Steel
Length
26 ft
1 main span
Daily traffic
8,659
2023 count
Owner
State
State Highway Agency

About this bridge

US 93 over Wildlife Upass-Drainage is a steel culvert carrying US 93 over Wildlife Upass-Drainage in Lake County, Montana. It was built in 2006, so it is 19 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 8 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 8,659 vehicles a day, roughly 4% of them trucks, projected to reach 9,092 by 2043. The structure is 26 ft (7.8 m) long. If it were closed, the detour would be 123.7 mi (199 km).

CarriesUS 93
CrossesWildlife Upass-Drainage
Location3M N ST Ignatius
RouteU.S. Route 93
StateMontana
Coordinates47.34569, -114.09681
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
Channel and channel protection9 ExcellentNo problems noted.
Culvert8 Very GoodNo problems noted.
Last inspectionJune 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation8: Equal to present desirable criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating61.9 US tons
Inventory rating45 US tons

Structure

Structure typeCulvert
MaterialSteel
DeckNot applicable
Main spans1
Design loadHS 20
Structure length26 ft (7.8 m)
Longest span26 ft (7.8 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic8,659 (2023)
Projected traffic9,092 by 2043
Trucks4%
Lanes on structure3
Traffic directionTwo-way traffic
CarriesHighway
CrossesRelief for waterway
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—
NavigationNo navigation control on waterway

Frequently asked questions

When was US 93 over Wildlife Upass-Drainage built?

It was built in 2006, making it 19 years old in 2025.

What condition is US 93 over Wildlife Upass-Drainage 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 Upass-Drainage carry?

About 8,659 vehicles per day (2023 count), of which roughly 4% are trucks.

How long is US 93 over Wildlife Upass-Drainage?

The structure is 26 ft (7.8 m) long with a longest span of 26 ft (7.8 m).

Who owns US 93 over Wildlife Upass-Drainage?

It is owned by the State Highway Agency.