US Bridges

N Seventh Ave over Int N 7th Ave-I 90

Fair

Gallatin County, Montana · Bozeman-N Seventh Ave · Structure no. U01207001+02231

Built
2014
11 years old
Condition
Fair
inspected May 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
200 ft
2 main spans
Daily traffic
26,020
2023 count
Owner
State
State Highway Agency

About this bridge

N Seventh Ave over Int N 7th Ave-I 90 is a prestressed concrete stringer/multi-beam or girder carrying N Seventh Ave over Int N 7th Ave-I 90 in Gallatin County, Montana. It was built in 2014, so it is 11 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 26,020 vehicles a day, roughly 1% of them trucks, projected to reach 27,321 by 2043. The structure is 200 ft (61 m) long and 101 ft wide. If it were closed, the detour would be 2.5 mi (4 km).

Location

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CarriesN Seventh Ave
CrossesInt N 7th Ave-I 90
LocationBozeman-N Seventh Ave
RouteState Highway 118
CountyGallatin County
StateMontana
Coordinates45.69698, -111.04619
Functional classUrban Minor Arterial

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.
Substructure7 GoodSome minor problems.
Last inspectionMay 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating77.1 US tons
Inventory rating39 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length200 ft (61 m)
Longest span100 ft (30.5 m)
Deck width101 ft (30.8 m)
Roadway width89 ft (27.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic26,020 (2023)
Projected traffic27,321 by 2043
Trucks1%
Lanes on structure6
Traffic directionTwo-way traffic
CarriesOverpass structure at an interchange
CrossesHighway
Detour if closed2.5 mi (4 km)
TollOn a free road
National Highway SystemYes

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$878,000
NavigationNot applicable (no waterway)

Frequently asked questions

When was N Seventh Ave over Int N 7th Ave-I 90 built?

It was built in 2014, making it 11 years old in 2025.

What condition is N Seventh Ave over Int N 7th Ave-I 90 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 N Seventh Ave over Int N 7th Ave-I 90 carry?

About 26,020 vehicles per day (2023 count), of which roughly 1% are trucks.

How long is N Seventh Ave over Int N 7th Ave-I 90?

The structure is 200 ft (61 m) long with a longest span of 100 ft (30.5 m) and a deck 101 ft wide.

Who owns N Seventh Ave over Int N 7th Ave-I 90?

It is owned by the State Highway Agency.