US Bridges

N Main ST over Canal - Walking Path

Fair

Silver Bow County, Montana · Butte-N Main ST · Structure no. U01801002+09441

Built
2009
16 years old
Condition
Fair
inspected October 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
98 ft
1 main span
Daily traffic
2,107
2023 count
Owner
State
State Highway Agency

About this bridge

N Main ST over Canal - Walking Path is a prestressed concrete stringer/multi-beam or girder carrying N Main ST over Canal - Walking Path in Silver Bow County, Montana. It was built in 2009, so it is 16 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 2,107 vehicles a day, projected to reach 2,212 by 2043. The structure is 98 ft (29.9 m) long and 39 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesN Main ST
CrossesCanal - Walking Path
LocationButte-N Main ST
RouteCity Street 1801
CountySilver Bow County
StateMontana
Coordinates46.02066, -112.5357
Functional classUrban Minor Arterial

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.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionOctober 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating66 US tons
Inventory rating44 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHL 93
Structure length98 ft (29.9 m)
Longest span95 ft (29 m)
Deck width39 ft (12 m)
Roadway width32 ft (9.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,107 (2023)
Projected traffic2,212 by 2043
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesPedestrian / bicycle
Detour if closed1.2 mi (2 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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$422,000
NavigationNot applicable (no waterway)

Frequently asked questions

When was N Main ST over Canal - Walking Path built?

It was built in 2009, making it 16 years old in 2025.

What condition is N Main ST over Canal - Walking Path 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 October 2023.

How much traffic does N Main ST over Canal - Walking Path carry?

About 2,107 vehicles per day (2023 count).

How long is N Main ST over Canal - Walking Path?

The structure is 98 ft (29.9 m) long with a longest span of 95 ft (29 m) and a deck 39 ft wide.

Who owns N Main ST over Canal - Walking Path?

It is owned by the State Highway Agency.