US Bridges

Road 261 over Irrigation Canal 041

FairPosted for load

Dawson County, Montana · 13M SW Glendive · Structure no. L11109012+06001

Built
1920
105 years old
Condition
Fair
inspected January 2025
Type
Stringer/Multi-beam or Girder
Wood or Timber
Length
31 ft
2 main spans
Daily traffic
21
2023 count
Owner
County
County Highway Agency

About this bridge

Road 261 over Irrigation Canal 041 is a wood or timber stringer/multi-beam or girder carrying Road 261 over Irrigation Canal 041 in Dawson County, Montana. It was built in 1920, so it is 105 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. Its operating status is: posted for load restriction.

It carries about 21 vehicles a day, roughly 10% of them trucks, projected to reach 22 by 2043. The structure is 31 ft (9.3 m) long and 28 ft wide. If it were closed, the detour would be 29.2 mi (47 km).

Location

Open in Google Maps
CarriesRoad 261
CrossesIrrigation Canal 041
Location13M SW Glendive
RouteCounty Highway 11109
CountyDawson County
StateMontana
Coordinates46.95233, -104.87601
Functional classRural Minor 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
Deck7 GoodSome minor problems.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJanuary 2025
Inspection intervalevery 24 months
Operating statusPosted for load 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 adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating29 US tons
Inventory rating19 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialWood or Timber
DeckWood or timber
Main spans2
Design loadUnknown
Structure length31 ft (9.3 m)
Longest span16 ft (4.9 m)
Deck width28 ft (8.5 m)
Roadway width26 ft (8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic21 (2023)
Projected traffic22 by 2043
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed29.2 mi (47 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusEligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Road 261 over Irrigation Canal 041 built?

It was built in 1920, making it 105 years old in 2025.

What condition is Road 261 over Irrigation Canal 041 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 Road 261 over Irrigation Canal 041 carry?

About 21 vehicles per day (2023 count), of which roughly 10% are trucks.

How long is Road 261 over Irrigation Canal 041?

The structure is 31 ft (9.3 m) long with a longest span of 16 ft (4.9 m) and a deck 28 ft wide.

Who owns Road 261 over Irrigation Canal 041?

It is owned by the County Highway Agency.