US Bridges

N 19th Ave over Int N 19th Ave

Fair

Gallatin County, Montana · Bozeman-N 19th Ave · Structure no. S00412000+04791

Built
1994
31 years old
Condition
Fair
inspected November 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
342 ft
4 main spans
Daily traffic
23,992
2023 count
Owner
State
State Highway Agency

About this bridge

N 19th Ave over Int N 19th Ave is a prestressed concrete stringer/multi-beam or girder carrying N 19th Ave over Int N 19th Ave in Gallatin County, Montana. It was built in 1994, so it is 31 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 23,992 vehicles a day, roughly 1% of them trucks, projected to reach 26,631 by 2043. The structure is 342 ft (104.2 m) long and 67 ft wide. If it were closed, the detour would be 8.1 mi (13 km).

Location

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CarriesN 19th Ave
CrossesInt N 19th Ave
LocationBozeman-N 19th Ave
RouteCity Street 412
CountyGallatin County
StateMontana
Coordinates45.7151, -111.06397
Functional classUrban Other Principal 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.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionNovember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating44 US tons
Inventory rating34 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length342 ft (104.2 m)
Longest span105 ft (32 m)
Deck width67 ft (20.3 m)
Roadway width57 ft (17.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic23,992 (2023)
Projected traffic26,631 by 2043
Trucks1%
Lanes on structure3
Traffic directionTwo-way traffic
CarriesOverpass structure at an interchange
CrossesHighway
Detour if closed8.1 mi (13 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 proposedNone recorded
Estimated improvement cost—
NavigationNot applicable (no waterway)

Frequently asked questions

When was N 19th Ave over Int N 19th Ave built?

It was built in 1994, making it 31 years old in 2025.

What condition is N 19th Ave over Int N 19th Ave 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 November 2023.

How much traffic does N 19th Ave over Int N 19th Ave carry?

About 23,992 vehicles per day (2023 count), of which roughly 1% are trucks.

How long is N 19th Ave over Int N 19th Ave?

The structure is 342 ft (104.2 m) long with a longest span of 105 ft (32 m) and a deck 67 ft wide.

Who owns N 19th Ave over Int N 19th Ave?

It is owned by the State Highway Agency.