US Bridges

N 19th Ave over Rr-S 205

Fair

Gallatin County, Montana · Bozeman-N 19th Ave · Structure no. S00412000+03561

Built
1994
31 years old
Condition
Fair
inspected November 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
317 ft
4 main spans
Daily traffic
8,938
2023 count
Owner
State
State Highway Agency

About this bridge

N 19th Ave over Rr-S 205 is a prestressed concrete stringer/multi-beam or girder carrying N 19th Ave over Rr-S 205 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 8,938 vehicles a day, roughly 4% of them trucks, projected to reach 9,921 by 2043. The structure is 317 ft (96.5 m) long and 63 ft wide. If it were closed, the detour would be 8.1 mi (13 km).

Location

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CarriesN 19th Ave
CrossesRr-S 205
LocationBozeman-N 19th Ave
RouteCity Street 1201
CountyGallatin County
StateMontana
Coordinates45.71674, -111.06336
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 geometry4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating52 US tons
Inventory rating28 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length317 ft (96.5 m)
Longest span106 ft (32.3 m)
Deck width63 ft (19.1 m)
Roadway width53 ft (16.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic8,938 (2023)
Projected traffic9,921 by 2043
Trucks4%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway and railroad
Detour if closed8.1 mi (13 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—
NavigationNot applicable (no waterway)

Frequently asked questions

When was N 19th Ave over Rr-S 205 built?

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

What condition is N 19th Ave over Rr-S 205 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 Rr-S 205 carry?

About 8,938 vehicles per day (2023 count), of which roughly 4% are trucks.

How long is N 19th Ave over Rr-S 205?

The structure is 317 ft (96.5 m) long with a longest span of 106 ft (32.3 m) and a deck 63 ft wide.

Who owns N 19th Ave over Rr-S 205?

It is owned by the State Highway Agency.