US Bridges

I 90 over Int Lozeau County Road

Fair

Mineral County, Montana · 7.4M E Superior · Structure no. I00090055+04471

Built
1967
58 years old, rebuilt 2012
Condition
Fair
inspected April 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
128 ft
3 main spans
Daily traffic
3,825
2023 count
Owner
State
State Highway Agency

About this bridge

I 90 over Int Lozeau County Road is a prestressed concrete stringer/multi-beam or girder carrying I 90 over Int Lozeau County Road in Mineral County, Montana. It was built in 1967 and reconstructed in 2012, so it is 58 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 3,825 vehicles a day, roughly 24% of them trucks, projected to reach 4,015 by 2043. The structure is 128 ft (39 m) long and 39 ft wide.

Location

Open in Google Maps
CarriesI 90
CrossesInt Lozeau County Road
Location7.4M E Superior
RouteInterstate 90
CountyMineral County
StateMontana
Coordinates47.10731, -114.78655
Functional classRural Principal Arterial - Interstate

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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Last inspectionApril 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating54 US tons
Inventory rating41 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length128 ft (39 m)
Longest span45 ft (13.7 m)
Deck width39 ft (11.9 m)
Roadway width37 ft (11.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,825 (2023)
Projected traffic4,015 by 2043
Trucks24%
Lanes on structure2
Traffic directionOne-way traffic
CarriesOverpass structure at an interchange
CrossesHighway
Detour if closed—
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkInterstate STRAHNET route

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—
NavigationNot applicable (no waterway)

Frequently asked questions

When was I 90 over Int Lozeau County Road built?

It was built in 1967, making it 58 years old in 2025. It was reconstructed in 2012.

What condition is I 90 over Int Lozeau County Road 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 April 2023.

How much traffic does I 90 over Int Lozeau County Road carry?

About 3,825 vehicles per day (2023 count), of which roughly 24% are trucks.

How long is I 90 over Int Lozeau County Road?

The structure is 128 ft (39 m) long with a longest span of 45 ft (13.7 m) and a deck 39 ft wide.

Who owns I 90 over Int Lozeau County Road?

It is owned by the State Highway Agency.