US Bridges

S 16th RD over Huntley Main Canal 006

Fair

Yellowstone County, Montana · Ballantine · Structure no. L56156000+03001

Built
1967
58 years old
Condition
Fair
inspected January 2025
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
61 ft
1 main span
Daily traffic
952
2023 count
Owner
County
County Highway Agency

About this bridge

S 16th RD over Huntley Main Canal 006 is a prestressed concrete stringer/multi-beam or girder carrying S 16th RD over Huntley Main Canal 006 in Yellowstone County, Montana. It was built in 1967, so it is 58 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 952 vehicles a day, roughly 3% of them trucks, projected to reach 1,004 by 2043. The structure is 61 ft (18.6 m) long and 37 ft wide. If it were closed, the detour would be 8.1 mi (13 km).

Location

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CarriesS 16th RD
CrossesHuntley Main Canal 006
LocationBallantine
RouteCounty Highway 56156
CountyYellowstone County
StateMontana
Coordinates45.94344, -108.15138
Functional classRural Major 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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJanuary 2025
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating54 US tons
Inventory rating41 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length61 ft (18.6 m)
Longest span60 ft (18.3 m)
Deck width37 ft (11.3 m)
Roadway width34 ft (10.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic952 (2023)
Projected traffic1,004 by 2043
Trucks3%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed8.1 mi (13 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 S 16th RD over Huntley Main Canal 006 built?

It was built in 1967, making it 58 years old in 2025.

What condition is S 16th RD over Huntley Main Canal 006 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 January 2025.

How much traffic does S 16th RD over Huntley Main Canal 006 carry?

About 952 vehicles per day (2023 count), of which roughly 3% are trucks.

How long is S 16th RD over Huntley Main Canal 006?

The structure is 61 ft (18.6 m) long with a longest span of 60 ft (18.3 m) and a deck 37 ft wide.

Who owns S 16th RD over Huntley Main Canal 006?

It is owned by the County Highway Agency.