US Bridges

Warman Loop over Bighorn Canal 018

Fair

Big Horn County, Montana · 3M NE Fort Smith · Structure no. L02224003+09001

Built
1930
95 years old
Condition
Fair
inspected January 2024
Type
Stringer/Multi-beam or Girder
Wood or Timber
Length
45 ft
2 main spans
Daily traffic
100
2025 count
Owner
County
County Highway Agency

About this bridge

Warman Loop over Bighorn Canal 018 is a wood or timber stringer/multi-beam or girder carrying Warman Loop over Bighorn Canal 018 in Big Horn County, Montana. It was built in 1930, so it is 95 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 100 vehicles a day, roughly 3% of them trucks, projected to reach 100 by 2040. The structure is 45 ft (13.7 m) long and 26 ft wide. If it were closed, the detour would be 6.8 mi (11 km).

CarriesWarman Loop
CrossesBighorn Canal 018
Location3M NE Fort Smith
RouteCounty Highway 2224
StateMontana
Coordinates45.33447, -107.86729
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.
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 inspectionJanuary 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry6: Equal to present minimum criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating40 US tons
Inventory rating28 US tons

Structure

MaterialWood or Timber
DeckWood or timber
Main spans2
Design loadHS 20
Structure length45 ft (13.7 m)
Longest span21 ft (6.4 m)
Deck width26 ft (7.9 m)
Roadway width25 ft (7.5 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 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 Warman Loop over Bighorn Canal 018 built?

It was built in 1930, making it 95 years old in 2025.

What condition is Warman Loop over Bighorn Canal 018 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 2024.

How much traffic does Warman Loop over Bighorn Canal 018 carry?

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

How long is Warman Loop over Bighorn Canal 018?

The structure is 45 ft (13.7 m) long with a longest span of 21 ft (6.4 m) and a deck 26 ft wide.

Who owns Warman Loop over Bighorn Canal 018?

It is owned by the County Highway Agency.