US Bridges

County Road 330 over Usbr Main Canal 058

Fair

Richland County, Montana · 5M N Savage · Structure no. L42330000+03001

Built
1980
45 years old
Condition
Fair
inspected February 2023
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
60 ft
1 main span
Daily traffic
21
2023 count
Owner
County
County Highway Agency

About this bridge

County Road 330 over Usbr Main Canal 058 is a prestressed concrete box beam or girders - multiple carrying County Road 330 over Usbr Main Canal 058 in Richland County, Montana. It was built in 1980, so it is 45 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 21 vehicles a day, roughly 3% of them trucks, projected to reach 22 by 2043. The structure is 60 ft (18.3 m) long and 24 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

Open in Google Maps
CarriesCounty Road 330
CrossesUsbr Main Canal 058
Location5M N Savage
RouteCounty Highway 42330
CountyRichland County
StateMontana
Coordinates47.51492, -104.31446
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
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 geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating81 US tons
Inventory rating53 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans1
Design loadHS 20
Structure length60 ft (18.3 m)
Longest span60 ft (18.3 m)
Deck width24 ft (7.4 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic21 (2023)
Projected traffic22 by 2043
Trucks3%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed5 mi (8 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 330 over Usbr Main Canal 058 built?

It was built in 1980, making it 45 years old in 2025.

What condition is County Road 330 over Usbr Main Canal 058 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 330 over Usbr Main Canal 058 carry?

About 21 vehicles per day (2023 count), of which roughly 3% are trucks.

How long is County Road 330 over Usbr Main Canal 058?

The structure is 60 ft (18.3 m) long with a longest span of 60 ft (18.3 m) and a deck 24 ft wide.

Who owns County Road 330 over Usbr Main Canal 058?

It is owned by the County Highway Agency.