US Bridges

Highland RD over Fort Belknap Canal 015

Fair

Blaine County, Montana · 1M N Lohman · Structure no. L03026000+09001

Built
1933
92 years old, rebuilt 2021
Condition
Fair
inspected October 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
41 ft
3 main spans
Daily traffic
126
2023 count
Owner
County
County Highway Agency

About this bridge

Highland RD over Fort Belknap Canal 015 is a steel continuous stringer/multi-beam or girder carrying Highland RD over Fort Belknap Canal 015 in Blaine County, Montana. It was built in 1933 and reconstructed in 2021, so it is 92 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 126 vehicles a day, roughly 3% of them trucks, projected to reach 133 by 2043. The structure is 41 ft (12.5 m) long and 24 ft wide. If it were closed, the detour would be 6.8 mi (11 km).

Location

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CarriesHighland RD
CrossesFort Belknap Canal 015
Location1M N Lohman
RouteCounty Highway 3007
CountyBlaine County
StateMontana
Coordinates48.60322, -109.39609
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
Deck8 Very GoodNo problems noted.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionOctober 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating32.2 US tons
Inventory rating24.7 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckCorrugated steel
Main spans3
Design loadHS 20
Structure length41 ft (12.5 m)
Longest span19 ft (5.9 m)
Deck width24 ft (7.3 m)
Roadway width23 ft (7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic126 (2023)
Projected traffic133 by 2043
Trucks3%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.8 mi (11 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 Highland RD over Fort Belknap Canal 015 built?

It was built in 1933, making it 92 years old in 2025. It was reconstructed in 2021.

What condition is Highland RD over Fort Belknap Canal 015 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 October 2024.

How much traffic does Highland RD over Fort Belknap Canal 015 carry?

About 126 vehicles per day (2023 count), of which roughly 3% are trucks.

How long is Highland RD over Fort Belknap Canal 015?

The structure is 41 ft (12.5 m) long with a longest span of 19 ft (5.9 m) and a deck 24 ft wide.

Who owns Highland RD over Fort Belknap Canal 015?

It is owned by the County Highway Agency.