US Bridges

Beck Hill RD over Little Blackfoot R 023

Good

Powell County, Montana · 3M E Garrison · Structure no. L39249003+06001

Built
2011
14 years old
Condition
Good
inspected May 2023
Type
Tee Beam
Prestressed Concrete
Length
116 ft
1 main span
Daily traffic
49
2023 count
Owner
County
County Highway Agency

About this bridge

Beck Hill RD over Little Blackfoot R 023 is a prestressed concrete tee beam carrying Beck Hill RD over Little Blackfoot R 023 in Powell County, Montana. It was built in 2011, so it is 14 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 49 vehicles a day, roughly 3% of them trucks, projected to reach 52 by 2043. The structure is 116 ft (35.4 m) long and 30 ft wide. If it were closed, the detour would be 11.2 mi (18 km).

CarriesBeck Hill RD
CrossesLittle Blackfoot R 023
Location3M E Garrison
RouteCounty Highway 39249
StateMontana
Coordinates46.53721, -112.7243
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 protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMay 2023
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 geometry6: Equal to present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating60 US tons
Inventory rating44 US tons

Structure

Structure typeTee Beam
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans1
Design loadHL 93
Structure length116 ft (35.4 m)
Longest span114 ft (34.7 m)
Deck width30 ft (9.2 m)
Roadway width24 ft (7.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic49 (2023)
Projected traffic52 by 2043
Trucks3%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed11.2 mi (18 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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$165,000
NavigationNo navigation control on waterway

Frequently asked questions

When was Beck Hill RD over Little Blackfoot R 023 built?

It was built in 2011, making it 14 years old in 2025.

What condition is Beck Hill RD over Little Blackfoot R 023 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 Beck Hill RD over Little Blackfoot R 023 carry?

About 49 vehicles per day (2023 count), of which roughly 3% are trucks.

How long is Beck Hill RD over Little Blackfoot R 023?

The structure is 116 ft (35.4 m) long with a longest span of 114 ft (34.7 m) and a deck 30 ft wide.

Who owns Beck Hill RD over Little Blackfoot R 023?

It is owned by the County Highway Agency.