US Bridges

1st LN SE over Greenfield Canal 055

FairPosted for load

Teton County, Montana · 1M SE Fairfield · Structure no. L50076005+08001

Built
1994
31 years old
Condition
Fair
inspected December 2023
Type
Stringer/Multi-beam or Girder
Wood or Timber
Length
62 ft
2 main spans
Daily traffic
100
2025 count
Owner
County
County Highway Agency

About this bridge

1st LN SE over Greenfield Canal 055 is a wood or timber stringer/multi-beam or girder carrying 1st LN SE over Greenfield Canal 055 in Teton County, Montana. It was built in 1994, so it is 31 years old, younger 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 6 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. 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 62 ft (18.8 m) long and 20 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
Carries1st LN SE
CrossesGreenfield Canal 055
Location1M SE Fairfield
RouteCounty Highway 50076
CountyTeton County
StateMontana
Coordinates47.60192, -111.9658
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
Deck8 Very GoodNo problems noted.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 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 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 alignment6: Equal to present minimum criteria
Operating rating30 US tons
Inventory rating20 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialWood or Timber
DeckCorrugated steel
Main spans2
Design loadHS 20
Structure length62 ft (18.8 m)
Longest span31 ft (9.4 m)
Deck width20 ft (6.1 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 closed3.7 mi (6 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 1st LN SE over Greenfield Canal 055 built?

It was built in 1994, making it 31 years old in 2025.

What condition is 1st LN SE over Greenfield Canal 055 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 December 2023.

How much traffic does 1st LN SE over Greenfield Canal 055 carry?

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

How long is 1st LN SE over Greenfield Canal 055?

The structure is 62 ft (18.8 m) long with a longest span of 31 ft (9.4 m) and a deck 20 ft wide.

Who owns 1st LN SE over Greenfield Canal 055?

It is owned by the County Highway Agency.