US Bridges

10th LN NW over Foster Creek 026

GoodPosted for load

Teton County, Montana · 11M N Choteau · Structure no. L50024010+07001

Built
1984
41 years old
Condition
Good
inspected December 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
51 ft
1 main span
Daily traffic
100
2025 count
Owner
County
County Highway Agency

About this bridge

10th LN NW over Foster Creek 026 is a steel stringer/multi-beam or girder carrying 10th LN NW over Foster Creek 026 in Teton County, Montana. It was built in 1984, so it is 41 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. Its operating status is: posted for load restriction.

It carries about 100 vehicles a day, roughly 3% of them trucks, projected to reach 100 by 2040. The structure is 51 ft (15.5 m) long and 20 ft wide. If it were closed, the detour would be 11.8 mi (19 km).

Carries10th LN NW
CrossesFoster Creek 026
Location11M N Choteau
RouteCounty Highway 50024
StateMontana
Coordinates47.97993, -112.20001
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.
Channel and channel protection7 GoodSome minor problems.
Last inspectionDecember 2023
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; scour above top of footing
Structural evaluation2: Basically intolerable, requiring high priority of replacement
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating5 US tons
Inventory rating5 US tons

Structure

MaterialSteel
DeckSteel plate
Main spans1
Design loadUnknown
Structure length51 ft (15.5 m)
Longest span50 ft (15.2 m)
Deck width20 ft (6.2 m)
Roadway width20 ft (6.2 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 closed11.8 mi (19 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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$180,000
NavigationNo navigation control on waterway

Frequently asked questions

When was 10th LN NW over Foster Creek 026 built?

It was built in 1984, making it 41 years old in 2025.

What condition is 10th LN NW over Foster Creek 026 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 10th LN NW over Foster Creek 026 carry?

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

How long is 10th LN NW over Foster Creek 026?

The structure is 51 ft (15.5 m) long with a longest span of 50 ft (15.2 m) and a deck 20 ft wide.

Who owns 10th LN NW over Foster Creek 026?

It is owned by the County Highway Agency.