US Bridges

Upper Ford RD over Yaak River 152

Good

Lincoln County, Montana · 6M N Yaak · Structure no. L27417000+03001

Built
1995
30 years old
Condition
Good
inspected August 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
140 ft
3 main spans
Daily traffic
100
2025 count
Owner
County
County Highway Agency

About this bridge

Upper Ford RD over Yaak River 152 is a steel continuous stringer/multi-beam or girder carrying Upper Ford RD over Yaak River 152 in Lincoln County, Montana. It was built in 1995, so it is 30 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 100 vehicles a day, roughly 3% of them trucks, projected to reach 100 by 2040. The structure is 140 ft (42.6 m) long and 18 ft wide. If it were closed, the detour would be 11.2 mi (18 km).

CarriesUpper Ford RD
CrossesYaak River 152
Location6M N Yaak
RouteCounty Highway 27417
StateMontana
Coordinates48.90792, -115.66071
Functional classRural Local

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 protection8 Very GoodNo problems noted.
Last inspectionAugust 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry8: Equal to present desirable criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating66 US tons
Inventory rating33 US tons

Structure

MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHL 93
Structure length140 ft (42.6 m)
Longest span70 ft (21.3 m)
Deck width18 ft (5.5 m)
Roadway width16 ft (4.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic100 (2025)
Projected traffic100 by 2040
Trucks3%
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed11.2 mi (18 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 Upper Ford RD over Yaak River 152 built?

It was built in 1995, making it 30 years old in 2025.

What condition is Upper Ford RD over Yaak River 152 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 August 2024.

How much traffic does Upper Ford RD over Yaak River 152 carry?

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

How long is Upper Ford RD over Yaak River 152?

The structure is 140 ft (42.6 m) long with a longest span of 70 ft (21.3 m) and a deck 18 ft wide.

Who owns Upper Ford RD over Yaak River 152?

It is owned by the County Highway Agency.