US Bridges

US 287 over Deep Creek

Fair

Teton County, Montana · 3M S Choteau · Structure no. P00009061+05971

Built
1965
60 years old
Condition
Fair
inspected March 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
184 ft
3 main spans
Daily traffic
532
2023 count
Owner
State
State Highway Agency

About this bridge

US 287 over Deep Creek is a prestressed concrete stringer/multi-beam or girder carrying US 287 over Deep Creek in Teton County, Montana. It was built in 1965, so it is 60 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 6 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

It carries about 532 vehicles a day, roughly 7% of them trucks, projected to reach 559 by 2043. The structure is 184 ft (56.1 m) long and 32 ft wide. If it were closed, the detour would be 57.2 mi (92 km).

Location

Open in Google Maps
CarriesUS 287
CrossesDeep Creek
Location3M S Choteau
RouteU.S. Route 287
CountyTeton County
StateMontana
Coordinates47.76955, -112.20492
Functional classRural Minor Arterial

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionMarch 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
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 rating57 US tons
Inventory rating34 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length184 ft (56.1 m)
Longest span61 ft (18.7 m)
Deck width32 ft (9.7 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic532 (2023)
Projected traffic559 by 2043
Trucks7%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed57.2 mi (92 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState 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 US 287 over Deep Creek built?

It was built in 1965, making it 60 years old in 2025.

What condition is US 287 over Deep Creek 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 March 2024.

How much traffic does US 287 over Deep Creek carry?

About 532 vehicles per day (2023 count), of which roughly 7% are trucks.

How long is US 287 over Deep Creek?

The structure is 184 ft (56.1 m) long with a longest span of 61 ft (18.7 m) and a deck 32 ft wide.

Who owns US 287 over Deep Creek?

It is owned by the State Highway Agency.