US Bridges

Hesper RD over Bbwa Canal 117

Fair

Yellowstone County, Montana · 3M SW Billings · Structure no. M56010000+05001

Built
1938
87 years old, rebuilt 1965
Condition
Fair
inspected December 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
39 ft
1 main span
Daily traffic
4,906
2023 count
Owner
County
County Highway Agency

About this bridge

Hesper RD over Bbwa Canal 117 is a steel stringer/multi-beam or girder carrying Hesper RD over Bbwa Canal 117 in Yellowstone County, Montana. It was built in 1938 and reconstructed in 1965, so it is 87 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 5 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 4,906 vehicles a day, roughly 2% of them trucks, projected to reach 5,372 by 2043. The structure is 39 ft (11.9 m) long and 28 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

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CarriesHesper RD
CrossesBbwa Canal 117
Location3M SW Billings
RouteCity Street 56526
CountyYellowstone County
StateMontana
Coordinates45.74061, -108.61582
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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionDecember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating41.4 US tons
Inventory rating24.7 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadUnknown
Structure length39 ft (11.9 m)
Longest span38 ft (11.6 m)
Deck width28 ft (8.5 m)
Roadway width27 ft (8.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,906 (2023)
Projected traffic5,372 by 2043
Trucks2%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.7 mi (6 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 Hesper RD over Bbwa Canal 117 built?

It was built in 1938, making it 87 years old in 2025. It was reconstructed in 1965.

What condition is Hesper RD over Bbwa Canal 117 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 Hesper RD over Bbwa Canal 117 carry?

About 4,906 vehicles per day (2023 count), of which roughly 2% are trucks.

How long is Hesper RD over Bbwa Canal 117?

The structure is 39 ft (11.9 m) long with a longest span of 38 ft (11.6 m) and a deck 28 ft wide.

Who owns Hesper RD over Bbwa Canal 117?

It is owned by the County Highway Agency.