US Bridges

Usfs Road 039 over Yaak River 039

Fair

Lincoln County, Montana · 15M N Troy · Structure no. L27039000+01001

Built
1934
91 years old, rebuilt 1986
Condition
Fair
inspected July 2024
Type
Truss - Thru
Steel
Length
231 ft
1 main span
Daily traffic
22
2023 count
Owner
County
County Highway Agency

About this bridge

Usfs Road 039 over Yaak River 039 is a steel truss - thru carrying Usfs Road 039 over Yaak River 039 in Lincoln County, Montana. It was built in 1934 and reconstructed in 1986, so it is 91 years old, older 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 5 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 22 vehicles a day, roughly 3% of them trucks, projected to reach 24 by 2043. The structure is 231 ft (70.4 m) long and 16 ft wide. If it were closed, the detour would be 49.7 mi (80 km).

Location

Open in Google Maps
CarriesUsfs Road 039
CrossesYaak River 039
Location15M N Troy
RouteFederal Lands Road 27039
CountyLincoln County
StateMontana
Coordinates48.68505, -115.85829
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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionJuly 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating33 US tons
Inventory rating23 US tons

Structure

Structure typeTruss - Thru
MaterialSteel
DeckWood or timber
Main spans1 (+2 approach)
Design loadUnknown
Structure length231 ft (70.4 m)
Longest span145 ft (44.2 m)
Deck width16 ft (4.8 m)
Roadway width15 ft (4.6 m)
Vertical clearance over deck16 ft (4.7 m)

Traffic and service

Average daily traffic22 (2023)
Projected traffic24 by 2043
Trucks3%
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed49.7 mi (80 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 Usfs Road 039 over Yaak River 039 built?

It was built in 1934, making it 91 years old in 2025. It was reconstructed in 1986.

What condition is Usfs Road 039 over Yaak River 039 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 July 2024.

How much traffic does Usfs Road 039 over Yaak River 039 carry?

About 22 vehicles per day (2023 count), of which roughly 3% are trucks.

How long is Usfs Road 039 over Yaak River 039?

The structure is 231 ft (70.4 m) long with a longest span of 145 ft (44.2 m) and a deck 16 ft wide.

Who owns Usfs Road 039 over Yaak River 039?

It is owned by the County Highway Agency.