US Bridges

I 90 over Sep N Rouse Ave-Rr

Fair

Gallatin County, Montana · Bozeman · Structure no. I00090307+06281

Built
2011
14 years old
Condition
Fair
inspected May 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
435 ft
3 main spans
Daily traffic
10,616
2023 count
Owner
State
State Highway Agency

About this bridge

I 90 over Sep N Rouse Ave-Rr is a steel continuous stringer/multi-beam or girder carrying I 90 over Sep N Rouse Ave-Rr in Gallatin 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 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 10,616 vehicles a day, roughly 12% of them trucks, projected to reach 11,465 by 2043. The structure is 435 ft (132.5 m) long and 39 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesI 90
CrossesSep N Rouse Ave-Rr
LocationBozeman
RouteInterstate 90
CountyGallatin County
StateMontana
Coordinates45.69354, -111.03149
Functional classUrban 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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMay 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating51 US tons
Inventory rating39 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length435 ft (132.5 m)
Longest span180 ft (55 m)
Deck width39 ft (12 m)
Roadway width38 ft (11.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic10,616 (2023)
Projected traffic11,465 by 2043
Trucks12%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway and railroad
Detour if closed1.2 mi (2 km)
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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$1.2 million
NavigationNot applicable (no waterway)

Frequently asked questions

When was I 90 over Sep N Rouse Ave-Rr built?

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

What condition is I 90 over Sep N Rouse Ave-Rr 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 I 90 over Sep N Rouse Ave-Rr carry?

About 10,616 vehicles per day (2023 count), of which roughly 12% are trucks.

How long is I 90 over Sep N Rouse Ave-Rr?

The structure is 435 ft (132.5 m) long with a longest span of 180 ft (55 m) and a deck 39 ft wide.

Who owns I 90 over Sep N Rouse Ave-Rr?

It is owned by the State Highway Agency.