US Bridges

County Road 334 over Usbr Main Canal 078

Fair

Richland County, Montana · 7M SW Savage · Structure no. L42334000+09001

Built
1992
33 years old
Condition
Fair
inspected February 2023
Type
Channel Beam
Prestressed Concrete
Length
60 ft
1 main span
Daily traffic
100
2025 count
Owner
County
County Highway Agency

About this bridge

County Road 334 over Usbr Main Canal 078 is a prestressed concrete channel beam carrying County Road 334 over Usbr Main Canal 078 in Richland 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 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 100 vehicles a day, roughly 3% of them trucks, projected to reach 100 by 2040. The structure is 60 ft (18.3 m) long and 31 ft wide. If it were closed, the detour would be 6.8 mi (11 km).

Location

Open in Google Maps
CarriesCounty Road 334
CrossesUsbr Main Canal 078
Location7M SW Savage
RouteCounty Highway 42334
CountyRichland County
StateMontana
Coordinates47.37834, -104.40545
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
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionFebruary 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating36 US tons
Inventory rating36 US tons

Structure

Structure typeChannel Beam
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans1
Design loadHS 20
Structure length60 ft (18.3 m)
Longest span58 ft (17.7 m)
Deck width31 ft (9.5 m)
Roadway width31 ft (9.4 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 County Road 334 over Usbr Main Canal 078 built?

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

What condition is County Road 334 over Usbr Main Canal 078 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 February 2023.

How much traffic does County Road 334 over Usbr Main Canal 078 carry?

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

How long is County Road 334 over Usbr Main Canal 078?

The structure is 60 ft (18.3 m) long with a longest span of 58 ft (17.7 m) and a deck 31 ft wide.

Who owns County Road 334 over Usbr Main Canal 078?

It is owned by the County Highway Agency.