US Bridges

Airport RD over Spring Creek 111

FairPosted for load

Teton County, Montana · NW Edge Choteau · Structure no. L50023000+01001

Built
1960
65 years old
Condition
Fair
inspected December 2023
Type
Stringer/Multi-beam or Girder
Wood or Timber
Length
29 ft
1 main span
Daily traffic
468
2023 count
Owner
County
County Highway Agency

About this bridge

Airport RD over Spring Creek 111 is a wood or timber stringer/multi-beam or girder carrying Airport RD over Spring Creek 111 in Teton County, Montana. It was built in 1960, so it is 65 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. Its operating status is: posted for load restriction.

It carries about 468 vehicles a day, roughly 3% of them trucks, projected to reach 494 by 2043. The structure is 29 ft (8.8 m) long and 22 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

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CarriesAirport RD
CrossesSpring Creek 111
LocationNW Edge Choteau
RouteCounty Highway 50023
CountyTeton County
StateMontana
Coordinates47.82073, -112.1881
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
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
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 geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating30 US tons
Inventory rating21.1 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialWood or Timber
DeckWood or timber
Main spans1
Design loadUnknown
Structure length29 ft (8.8 m)
Longest span27 ft (8.2 m)
Deck width22 ft (6.6 m)
Roadway width20 ft (6.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic468 (2023)
Projected traffic494 by 2043
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 Airport RD over Spring Creek 111 built?

It was built in 1960, making it 65 years old in 2025.

What condition is Airport RD over Spring Creek 111 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 Airport RD over Spring Creek 111 carry?

About 468 vehicles per day (2023 count), of which roughly 3% are trucks.

How long is Airport RD over Spring Creek 111?

The structure is 29 ft (8.8 m) long with a longest span of 27 ft (8.2 m) and a deck 22 ft wide.

Who owns Airport RD over Spring Creek 111?

It is owned by the County Highway Agency.