US Bridges

County Road 319 over Usbr Main Canal 071

Good

Dawson County, Montana · Intake · Structure no. L11318001+05001

Built
1991
34 years old
Condition
Good
inspected May 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
115 ft
3 main spans
Daily traffic
46
2023 count
Owner
County
County Highway Agency

About this bridge

County Road 319 over Usbr Main Canal 071 is a steel continuous stringer/multi-beam or girder carrying County Road 319 over Usbr Main Canal 071 in Dawson County, Montana. It was built in 1991, so it is 34 years old, younger than the Montana average of 47 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 46 vehicles a day, roughly 3% of them trucks, projected to reach 49 by 2043. The structure is 115 ft (35.2 m) long and 26 ft wide. If it were closed, the detour would be 123.7 mi (199 km).

CarriesCounty Road 319
CrossesUsbr Main Canal 071
LocationIntake
RouteCounty Highway 11319
StateMontana
Coordinates47.28317, -104.52714
Functional classRural Local

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionMay 2023
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 adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating33 US tons
Inventory rating25 US tons

Structure

MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length115 ft (35.2 m)
Longest span87 ft (26.5 m)
Deck width26 ft (8 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic46 (2023)
Projected traffic49 by 2043
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 County Road 319 over Usbr Main Canal 071 built?

It was built in 1991, making it 34 years old in 2025.

What condition is County Road 319 over Usbr Main Canal 071 in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in May 2023.

How much traffic does County Road 319 over Usbr Main Canal 071 carry?

About 46 vehicles per day (2023 count), of which roughly 3% are trucks.

How long is County Road 319 over Usbr Main Canal 071?

The structure is 115 ft (35.2 m) long with a longest span of 87 ft (26.5 m) and a deck 26 ft wide.

Who owns County Road 319 over Usbr Main Canal 071?

It is owned by the County Highway Agency.