US Bridges

2nd Road SW over Big Coulee

Good

Teton County, Montana · 5M SW Fairfield · Structure no. 000000201904601

Built
2019
6 years old
Condition
Good
inspected February 2024
Type
Culvert
Concrete
Length
22 ft
1 main span
Daily traffic
100
2025 count
Owner
County
County Highway Agency

About this bridge

2nd Road SW over Big Coulee is a concrete culvert carrying 2nd Road SW over Big Coulee in Teton County, Montana. It was built in 2019, so it is 6 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 9 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 22 ft (6.6 m) long and 54 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
Carries2nd Road SW
CrossesBig Coulee
Location5M SW Fairfield
RouteCounty Highway 50412
CountyTeton County
StateMontana
Coordinates47.57914, -112.06819
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
Channel and channel protection7 GoodSome minor problems.
Culvert9 ExcellentNo problems noted.
Last inspectionFebruary 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
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 rating43 US tons
Inventory rating33 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans1
Design loadHL 93
Structure length22 ft (6.6 m)
Longest span20 ft (6.1 m)
Deck width54 ft (16.5 m)
Roadway width20 ft (6.1 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 closed3.1 mi (5 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 2nd Road SW over Big Coulee built?

It was built in 2019, making it 6 years old in 2025.

What condition is 2nd Road SW over Big Coulee 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 February 2024.

How much traffic does 2nd Road SW over Big Coulee carry?

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

How long is 2nd Road SW over Big Coulee?

The structure is 22 ft (6.6 m) long with a longest span of 20 ft (6.1 m) and a deck 54 ft wide.

Who owns 2nd Road SW over Big Coulee?

It is owned by the County Highway Agency.