US Bridges

Hilltop RD over Bbwa Canal

Fair

Yellowstone County, Montana · Billings-Hilltop RD · Structure no. U01027001+09601

Built
1960
65 years old, rebuilt 2012
Condition
Fair
inspected December 2024
Type
Tee Beam
Prestressed Concrete
Length
42 ft
1 main span
Daily traffic
8,274
2023 count
Owner
County
County Highway Agency

About this bridge

Hilltop RD over Bbwa Canal is a prestressed concrete tee beam carrying Hilltop RD over Bbwa Canal in Yellowstone County, Montana. It was built in 1960 and reconstructed in 2012, so it is 65 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 8,274 vehicles a day, roughly 1% of them trucks, projected to reach 8,688 by 2043. The structure is 42 ft (12.8 m) long and 59 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesHilltop RD
CrossesBbwa Canal
LocationBillings-Hilltop RD
RouteCity Street 1027
StateMontana
Coordinates45.81291, -108.47798
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
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionDecember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry9: Superior to present desirable criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating56.1 US tons
Inventory rating27.4 US tons

Structure

Structure typeTee Beam
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans1
Design loadHS 20
Structure length42 ft (12.8 m)
Longest span39 ft (11.9 m)
Deck width59 ft (18.1 m)
Roadway width48 ft (14.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic8,274 (2023)
Projected traffic8,688 by 2043
Trucks1%
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—
NavigationNo navigation control on waterway

Frequently asked questions

When was Hilltop RD over Bbwa Canal built?

It was built in 1960, making it 65 years old in 2025. It was reconstructed in 2012.

What condition is Hilltop RD over Bbwa 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 December 2024.

How much traffic does Hilltop RD over Bbwa Canal carry?

About 8,274 vehicles per day (2023 count), of which roughly 1% are trucks.

How long is Hilltop RD over Bbwa Canal?

The structure is 42 ft (12.8 m) long with a longest span of 39 ft (11.9 m) and a deck 59 ft wide.

Who owns Hilltop RD over Bbwa Canal?

It is owned by the County Highway Agency.