US Bridges

Little Blackfoot R over Little Blackfoot River

Good

Powell County, Montana · 5M S Elliston · Structure no. 000000201907091

Built
1981
44 years old
Condition
Good
inspected May 2023
Type
Tee Beam
Concrete
Length
68 ft
1 main span
Daily traffic
100
2025 count
Owner
County
County Highway Agency

About this bridge

Little Blackfoot R over Little Blackfoot River is a concrete tee beam carrying Little Blackfoot R over Little Blackfoot River in Powell County, Montana. It was built in 1981, so it is 44 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 7 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 68 ft (20.7 m) long and 17 ft wide. If it were closed, the detour would be 123.7 mi (199 km).

CarriesLittle Blackfoot R
CrossesLittle Blackfoot River
Location5M S Elliston
RouteCounty Highway 39005
StateMontana
Coordinates46.50438, -112.40369
Functional classRural Minor Collector

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionMay 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation*: *
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating—
Inventory rating—

Structure

Structure typeTee Beam
MaterialConcrete
DeckOther
Main spans1
Design loadUnknown
Structure length68 ft (20.7 m)
Longest span62 ft (18.9 m)
Deck width17 ft (5.1 m)
Roadway width14 ft (4.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic100 (2025)
Projected traffic100 by 2040
Trucks3%
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed123.7 mi (199 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 Little Blackfoot R over Little Blackfoot River built?

It was built in 1981, making it 44 years old in 2025.

What condition is Little Blackfoot R over Little Blackfoot River 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 May 2023.

How much traffic does Little Blackfoot R over Little Blackfoot River carry?

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

How long is Little Blackfoot R over Little Blackfoot River?

The structure is 68 ft (20.7 m) long with a longest span of 62 ft (18.9 m) and a deck 17 ft wide.

Who owns Little Blackfoot R over Little Blackfoot River?

It is owned by the County Highway Agency.