US Bridges

Canton Lane over Cf Wma - Eastside Canal

Fair

Broadwater County, Montana · 3 MI NE of Townsend Mt · Structure no. MTA-CF-002

Built
1974
51 years old
Condition
Fair
inspected August 2023
Type
Tee Beam
Prestressed Concrete
Length
42 ft
1 main span
Daily traffic
5
2019 count
Owner
Federal
Bureau of Reclamation

About this bridge

Canton Lane over Cf Wma - Eastside Canal is a prestressed concrete tee beam carrying Canton Lane over Cf Wma - Eastside Canal in Broadwater County, Montana. It was built in 1974, so it is 51 years old, older than the Montana average of 47 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 6 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

It carries about 5 vehicles a day, projected to reach 7 by 2041. The structure is 42 ft (12.7 m) long and 18 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

Location

Open in Google Maps
CarriesCanton Lane
CrossesCf Wma - Eastside Canal
Location3 MI NE of Townsend Mt
RouteState Lands Road 0
CountyBroadwater County
StateMontana
Coordinates46.35946, -111.50369
Functional classRural Local

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionAugust 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to present minimum criteria
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment4: Meets minimum tolerable limits to be left in place as is
Operating rating44.6 US tons
Inventory rating26.8 US tons

Structure

Structure typeTee Beam
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans1
Design loadH 20
Structure length42 ft (12.7 m)
Longest span39 ft (12 m)
Deck width18 ft (5.5 m)
Roadway width17 ft (5.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic5 (2019)
Projected traffic7 by 2041
Trucks—
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.2 mi (10 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerBureau of Reclamation
Maintained byBureau of Fish and Wildlife
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 Canton Lane over Cf Wma - Eastside Canal built?

It was built in 1974, making it 51 years old in 2025.

What condition is Canton Lane over Cf Wma - Eastside Canal in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in August 2023.

How much traffic does Canton Lane over Cf Wma - Eastside Canal carry?

About 5 vehicles per day (2019 count).

How long is Canton Lane over Cf Wma - Eastside Canal?

The structure is 42 ft (12.7 m) long with a longest span of 39 ft (12 m) and a deck 18 ft wide.

Who owns Canton Lane over Cf Wma - Eastside Canal?

It is owned by the Bureau of Reclamation and maintained by the Bureau of Fish and Wildlife.