US Bridges

Bala ST over Little Bighorn River 069

Fair

Big Horn County, Montana · Crow Agency · Structure no. L02046011+03001

Built
1958
67 years old
Condition
Fair
inspected May 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
155 ft
3 main spans
Daily traffic
100
2025 count
Owner
State
State Highway Agency

About this bridge

Bala ST over Little Bighorn River 069 is a prestressed concrete stringer/multi-beam or girder carrying Bala ST over Little Bighorn River 069 in Big Horn County, Montana. It was built in 1958, so it is 67 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 155 ft (47.2 m) long and 28 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

CarriesBala ST
CrossesLittle Bighorn River 069
LocationCrow Agency
RouteState Highway 2046
StateMontana
Coordinates45.59718, -107.45982
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.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionMay 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; action required to protect exposed foundations
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating35.1 US tons
Inventory rating22 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3
Design loadHS 15
Structure length155 ft (47.2 m)
Longest span52 ft (15.8 m)
Deck width28 ft (8.4 m)
Roadway width24 ft (7.3 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 closed3.7 mi (6 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 Bala ST over Little Bighorn River 069 built?

It was built in 1958, making it 67 years old in 2025.

What condition is Bala ST over Little Bighorn River 069 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 May 2024.

How much traffic does Bala ST over Little Bighorn River 069 carry?

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

How long is Bala ST over Little Bighorn River 069?

The structure is 155 ft (47.2 m) long with a longest span of 52 ft (15.8 m) and a deck 28 ft wide.

Who owns Bala ST over Little Bighorn River 069?

It is owned by the State Highway Agency.