US Bridges

W River RD over Clark Fork River 014

Fair

Deer Lodge County, Montana · 6M N Warm Springs · Structure no. L12166000+04001

Built
1981
44 years old
Condition
Fair
inspected February 2024
Type
Tee Beam
Prestressed Concrete
Length
78 ft
1 main span
Daily traffic
100
2025 count
Owner
County
County Highway Agency

About this bridge

W River RD over Clark Fork River 014 is a prestressed concrete tee beam carrying W River RD over Clark Fork River 014 in Deer Lodge County, Montana. It was built in 1981, so it is 44 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 78 ft (23.9 m) long and 27 ft wide. If it were closed, the detour would be 5 mi (8 km).

CarriesW River RD
CrossesClark Fork River 014
Location6M N Warm Springs
RouteCounty Highway 12166
StateMontana
Coordinates46.26533, -112.74462
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.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionFebruary 2024
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 geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment4: Meets minimum tolerable limits to be left in place as is
Operating rating38.6 US tons
Inventory rating21.4 US tons

Structure

Structure typeTee Beam
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans1
Design loadHS 20
Structure length78 ft (23.9 m)
Longest span72 ft (21.9 m)
Deck width27 ft (8.1 m)
Roadway width24 ft (7.3 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 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 W River RD over Clark Fork River 014 built?

It was built in 1981, making it 44 years old in 2025.

What condition is W River RD over Clark Fork River 014 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 2024.

How much traffic does W River RD over Clark Fork River 014 carry?

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

How long is W River RD over Clark Fork River 014?

The structure is 78 ft (23.9 m) long with a longest span of 72 ft (21.9 m) and a deck 27 ft wide.

Who owns W River RD over Clark Fork River 014?

It is owned by the County Highway Agency.