US Bridges

Basin ST over Basin Creek 040

Fair

Jefferson County, Montana · Basin · Structure no. L22076001+02001

Built
1931
94 years old
Condition
Fair
inspected June 2023
Type
Slab
Concrete
Length
24 ft
1 main span
Daily traffic
100
2025 count
Owner
State
State Highway Agency

About this bridge

Basin ST over Basin Creek 040 is a concrete slab carrying Basin ST over Basin Creek 040 in Jefferson County, Montana. It was built in 1931, so it is 94 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 24 ft (7.3 m) long and 44 ft wide. If it were closed, the detour would be 123.7 mi (199 km).

Location

Open in Google Maps
CarriesBasin ST
CrossesBasin Creek 040
LocationBasin
RouteState Highway 22076
CountyJefferson County
StateMontana
Coordinates46.27095, -112.26257
Functional classRural Local

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 protection8 Very GoodNo problems noted.
Last inspectionJune 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry9: Superior to present desirable criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating41.1 US tons
Inventory rating24.6 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length24 ft (7.3 m)
Longest span23 ft (7 m)
Deck width44 ft (13.4 m)
Roadway width38 ft (11.6 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 closed123.7 mi (199 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 Basin ST over Basin Creek 040 built?

It was built in 1931, making it 94 years old in 2025.

What condition is Basin ST over Basin Creek 040 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 June 2023.

How much traffic does Basin ST over Basin Creek 040 carry?

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

How long is Basin ST over Basin Creek 040?

The structure is 24 ft (7.3 m) long with a longest span of 23 ft (7 m) and a deck 44 ft wide.

Who owns Basin ST over Basin Creek 040?

It is owned by the State Highway Agency.