US Bridges

Anderson Lane over West Side Canal 1

Fair

Beaverhead County, Montana · 6M NE Dillon · Structure no. L01316000+03001

Built
2012
13 years old
Condition
Fair
inspected November 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
40 ft
1 main span
Daily traffic
54
2023 count
Owner
County
County Highway Agency

About this bridge

Anderson Lane over West Side Canal 1 is a steel stringer/multi-beam or girder carrying Anderson Lane over West Side Canal 1 in Beaverhead County, Montana. It was built in 2012, so it is 13 years old, younger 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 54 vehicles a day, roughly 3% of them trucks, projected to reach 58 by 2043. The structure is 40 ft (12.2 m) long and 30 ft wide. If it were closed, the detour would be 24.9 mi (40 km).

Location

Open in Google Maps
CarriesAnderson Lane
CrossesWest Side Canal 1
Location6M NE Dillon
RouteCounty Highway 16
CountyBeaverhead County
StateMontana
Coordinates45.30556, -112.63472
Functional classRural Minor Collector

Condition and inspection

Fair

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

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionNovember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating57 US tons
Inventory rating44 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckCorrugated steel
Main spans1
Design loadHS 20
Structure length40 ft (12.2 m)
Longest span39 ft (11.9 m)
Deck width30 ft (9 m)
Roadway width28 ft (8.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic54 (2023)
Projected traffic58 by 2043
Trucks3%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed24.9 mi (40 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty 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 Anderson Lane over West Side Canal 1 built?

It was built in 2012, making it 13 years old in 2025.

What condition is Anderson Lane over West Side Canal 1 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 November 2023.

How much traffic does Anderson Lane over West Side Canal 1 carry?

About 54 vehicles per day (2023 count), of which roughly 3% are trucks.

How long is Anderson Lane over West Side Canal 1?

The structure is 40 ft (12.2 m) long with a longest span of 39 ft (11.9 m) and a deck 30 ft wide.

Who owns Anderson Lane over West Side Canal 1?

It is owned by the County Highway Agency.