US Bridges

US 89 over Valier Canal

Good

Pondera County, Montana · 3M NW Dupuyer · Structure no. P00003079+00401

Built
1965
60 years old
Condition
Good
inspected October 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
83 ft
2 main spans
Daily traffic
470
2023 count
Owner
State
State Highway Agency

About this bridge

US 89 over Valier Canal is a prestressed concrete stringer/multi-beam or girder carrying US 89 over Valier Canal in Pondera County, Montana. It was built in 1965, so it is 60 years old, older 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 470 vehicles a day, roughly 6% of them trucks, projected to reach 494 by 2043. The structure is 83 ft (25.3 m) long and 38 ft wide. If it were closed, the detour would be 64 mi (103 km).

CarriesUS 89
CrossesValier Canal
Location3M NW Dupuyer
RouteU.S. Route 89
StateMontana
Coordinates48.23675, -112.53249
Functional classRural Minor Arterial

Condition and inspection

Good

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

ComponentRatingMeaning
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionOctober 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation7: Better than present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating46 US tons
Inventory rating38 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length83 ft (25.3 m)
Longest span41 ft (12.4 m)
Deck width38 ft (11.6 m)
Roadway width35 ft (10.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic470 (2023)
Projected traffic494 by 2043
Trucks6%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed64 mi (103 km)
TollOn a free road
National Highway SystemNo

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 89 over Valier Canal built?

It was built in 1965, making it 60 years old in 2025.

What condition is US 89 over Valier Canal 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 October 2023.

How much traffic does US 89 over Valier Canal carry?

About 470 vehicles per day (2023 count), of which roughly 6% are trucks.

How long is US 89 over Valier Canal?

The structure is 83 ft (25.3 m) long with a longest span of 41 ft (12.4 m) and a deck 38 ft wide.

Who owns US 89 over Valier Canal?

It is owned by the State Highway Agency.