US Bridges

Pine Butte RD over Highline Canal 114

FairPosted for load

Gallatin County, Montana · 6M S Belgrade · Structure no. L16491001+00001

Built
1992
33 years old
Condition
Fair
inspected April 2023
Type
Stringer/Multi-beam or Girder
Wood or Timber
Length
23 ft
1 main span
Daily traffic
100
2025 count
Owner
County
County Highway Agency

About this bridge

Pine Butte RD over Highline Canal 114 is a wood or timber stringer/multi-beam or girder carrying Pine Butte RD over Highline Canal 114 in Gallatin County, Montana. It was built in 1992, so it is 33 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 5 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. Its operating status is: posted for load restriction.

It carries about 100 vehicles a day, roughly 3% of them trucks, projected to reach 100 by 2040. The structure is 23 ft (7 m) long and 24 ft wide. If it were closed, the detour would be 123.7 mi (199 km).

CarriesPine Butte RD
CrossesHighline Canal 114
Location6M S Belgrade
RouteCounty Highway 16491
StateMontana
Coordinates45.65822, -111.24694
Functional classRural Local

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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionApril 2023
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating30 US tons
Inventory rating22 US tons

Structure

MaterialWood or Timber
DeckWood or timber
Main spans1
Design loadUnknown
Structure length23 ft (7 m)
Longest span21 ft (6.4 m)
Deck width24 ft (7.3 m)
Roadway width23 ft (6.9 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
CrossesWaterway
Detour if closed123.7 mi (199 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 Pine Butte RD over Highline Canal 114 built?

It was built in 1992, making it 33 years old in 2025.

What condition is Pine Butte RD over Highline Canal 114 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 April 2023.

How much traffic does Pine Butte RD over Highline Canal 114 carry?

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

How long is Pine Butte RD over Highline Canal 114?

The structure is 23 ft (7 m) long with a longest span of 21 ft (6.4 m) and a deck 24 ft wide.

Who owns Pine Butte RD over Highline Canal 114?

It is owned by the County Highway Agency.