US Bridges

11th ST W over Bbwa Canal 047

Good

Yellowstone County, Montana · BILLINGS-11th ST W · Structure no. M56010000+00401

Built
2007
18 years old
Condition
Good
inspected December 2024
Type
Tee Beam
Prestressed Concrete
Length
44 ft
1 main span
Daily traffic
100
2025 count
Owner
County
County Highway Agency

About this bridge

11th ST W over Bbwa Canal 047 is a prestressed concrete tee beam carrying 11th ST W over Bbwa Canal 047 in Yellowstone County, Montana. It was built in 2007, so it is 18 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 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 100 vehicles a day, roughly 3% of them trucks, projected to reach 100 by 2040. The structure is 44 ft (13.5 m) long and 48 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Carries11th ST W
CrossesBbwa Canal 047
LocationBILLINGS-11th ST W
RouteCity Street 56010
StateMontana
Coordinates45.79371, -108.54278
Functional classUrban Local

Condition and inspection

Good

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

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionDecember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry9: Superior to present desirable criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating54 US tons
Inventory rating36 US tons

Structure

Structure typeTee Beam
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans1
Design loadHS 20
Structure length44 ft (13.5 m)
Longest span44 ft (13.5 m)
Deck width48 ft (14.5 m)
Roadway width36 ft (11.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic100 (2025)
Projected traffic100 by 2040
Trucks3%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed1.2 mi (2 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$122,000
NavigationNo navigation control on waterway

Frequently asked questions

When was 11th ST W over Bbwa Canal 047 built?

It was built in 2007, making it 18 years old in 2025.

What condition is 11th ST W over Bbwa Canal 047 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 December 2024.

How much traffic does 11th ST W over Bbwa Canal 047 carry?

About 100 vehicles per day (2025 count), of which roughly 3% are trucks.

How long is 11th ST W over Bbwa Canal 047?

The structure is 44 ft (13.5 m) long with a longest span of 44 ft (13.5 m) and a deck 48 ft wide.

Who owns 11th ST W over Bbwa Canal 047?

It is owned by the County Highway Agency.