US Bridges

Pishkun RD over Willow Creek 070

Fair

Teton County, Montana · 9M SW Choteau · Structure no. L50011003+02001

Built
1970
55 years old
Condition
Fair
inspected December 2024
Type
Slab
Prestressed Concrete
Length
62 ft
3 main spans
Daily traffic
100
2025 count
Owner
County
County Highway Agency

About this bridge

Pishkun RD over Willow Creek 070 is a prestressed concrete slab carrying Pishkun RD over Willow Creek 070 in Teton County, Montana. It was built in 1970, so it is 55 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 100 vehicles a day, roughly 3% of them trucks, projected to reach 100 by 2040. The structure is 62 ft (18.9 m) long and 23 ft wide. If it were closed, the detour would be 31.1 mi (50 km).

CarriesPishkun RD
CrossesWillow Creek 070
Location9M SW Choteau
RouteCounty Highway 50207
StateMontana
Coordinates47.74379, -112.31654
Functional classRural Minor Collector

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.
Superstructure8 Very GoodNo problems noted.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionDecember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to 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 alignment6: Equal to present minimum criteria
Operating rating39.7 US tons
Inventory rating26.5 US tons

Structure

Structure typeSlab
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans3
Design loadHS 20
Structure length62 ft (18.9 m)
Longest span20 ft (6.1 m)
Deck width23 ft (6.9 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 closed31.1 mi (50 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 Pishkun RD over Willow Creek 070 built?

It was built in 1970, making it 55 years old in 2025.

What condition is Pishkun RD over Willow Creek 070 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 2024.

How much traffic does Pishkun RD over Willow Creek 070 carry?

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

How long is Pishkun RD over Willow Creek 070?

The structure is 62 ft (18.9 m) long with a longest span of 20 ft (6.1 m) and a deck 23 ft wide.

Who owns Pishkun RD over Willow Creek 070?

It is owned by the County Highway Agency.