US Bridges

746 Vinal Lake Rd. over E Fk Yaak

Fair

Lincoln County, Montana · 0.1 MI from JCT With 92 · Structure no. 011404000000155

Built
1968
57 years old
Condition
Fair
inspected August 2023
Type
Stringer/Multi-beam or Girder
Wood or Timber
Length
36 ft
1 main span
Daily traffic
50
1994 count
Owner
Federal
U.S. Forest Service

About this bridge

746 Vinal Lake Rd. over E Fk Yaak is a wood or timber stringer/multi-beam or girder carrying 746 Vinal Lake Rd. over E Fk Yaak in Lincoln County, Montana. It was built in 1968, so it is 57 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 50 vehicles a day, projected to reach 75 by 2045. The structure is 36 ft (11.1 m) long and 15 ft wide. If it were closed, the detour would be 98.2 mi (158 km).

Location

Open in Google Maps
Carries746 Vinal Lake Rd.
CrossesE Fk Yaak
Location0.1 MI from JCT With 92
RouteFederal Lands Road 746
CountyLincoln County
StateMontana
Coordinates48.9468, -115.57404
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.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionAugust 2023
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 geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating47.5 US tons
Inventory rating36.8 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialWood or Timber
DeckWood or timber
Main spans1
Design loadHS 25 or greater
Structure length36 ft (11.1 m)
Longest span35 ft (10.7 m)
Deck width15 ft (4.6 m)
Roadway width13 ft (4.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic50 (1994)
Projected traffic75 by 2045
Trucks—
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed98.2 mi (158 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerU.S. Forest Service
Maintained byU.S. Forest Service
Historic statusHistorical significance not determinable at this time
Work proposedOther structural work, including hydraulic replacements
Estimated improvement cost$6,000
NavigationNo navigation control on waterway

Frequently asked questions

When was 746 Vinal Lake Rd. over E Fk Yaak built?

It was built in 1968, making it 57 years old in 2025.

What condition is 746 Vinal Lake Rd. over E Fk Yaak 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 August 2023.

How much traffic does 746 Vinal Lake Rd. over E Fk Yaak carry?

About 50 vehicles per day (1994 count).

How long is 746 Vinal Lake Rd. over E Fk Yaak?

The structure is 36 ft (11.1 m) long with a longest span of 35 ft (10.7 m) and a deck 15 ft wide.

Who owns 746 Vinal Lake Rd. over E Fk Yaak?

It is owned by the U.S. Forest Service.