US Bridges

County Road 468 over Diversion Canal 079

Good

Sheridan County, Montana · 1M W Medicine Lake · Structure no. L46468000+00001

Built
2004
21 years old
Condition
Good
inspected December 2023
Type
Tee Beam
Prestressed Concrete
Length
52 ft
1 main span
Daily traffic
79
2023 count
Owner
County
County Highway Agency

About this bridge

County Road 468 over Diversion Canal 079 is a prestressed concrete tee beam carrying County Road 468 over Diversion Canal 079 in Sheridan County, Montana. It was built in 2004, so it is 21 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 79 vehicles a day, roughly 8% of them trucks, projected to reach 83 by 2043. The structure is 52 ft (15.8 m) long and 20 ft wide. If it were closed, the detour would be 123.7 mi (199 km).

Location

Open in Google Maps
CarriesCounty Road 468
CrossesDiversion Canal 079
Location1M W Medicine Lake
RouteCounty Highway 468
CountySheridan County
StateMontana
Coordinates48.50561, -104.53028
Functional classRural Minor Collector

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 protection7 GoodSome minor problems.
Last inspectionDecember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment4: Meets minimum tolerable limits to be left in place as is
Operating rating37.5 US tons
Inventory rating22.2 US tons

Structure

Structure typeTee Beam
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans1
Design loadHS 20
Structure length52 ft (15.8 m)
Longest span52 ft (15.8 m)
Deck width20 ft (6.1 m)
Roadway width19 ft (5.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic79 (2023)
Projected traffic83 by 2043
Trucks8%
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 468 over Diversion Canal 079 built?

It was built in 2004, making it 21 years old in 2025.

What condition is County Road 468 over Diversion Canal 079 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 December 2023.

How much traffic does County Road 468 over Diversion Canal 079 carry?

About 79 vehicles per day (2023 count), of which roughly 8% are trucks.

How long is County Road 468 over Diversion Canal 079?

The structure is 52 ft (15.8 m) long with a longest span of 52 ft (15.8 m) and a deck 20 ft wide.

Who owns County Road 468 over Diversion Canal 079?

It is owned by the County Highway Agency.