US Bridges

P 86-BRIDGER DR over East Gallatin River

Fair

Gallatin County, Montana · 1M N Bozeman · Structure no. P00086001+04821

Built
1984
41 years old
Condition
Fair
inspected August 2023
Type
Slab
Concrete Continuous
Length
78 ft
3 main spans
Daily traffic
8,443
2023 count
Owner
State
State Highway Agency

About this bridge

P 86-BRIDGER DR over East Gallatin River is a concrete continuous slab carrying P 86-BRIDGER DR over East Gallatin River in Gallatin County, Montana. It was built in 1984, so it is 41 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 8,443 vehicles a day, roughly 2% of them trucks, projected to reach 9,287 by 2043. The structure is 78 ft (23.8 m) long and 64 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesP 86-BRIDGER DR
CrossesEast Gallatin River
Location1M N Bozeman
RouteState Highway 86
CountyGallatin County
StateMontana
Coordinates45.70053, -111.0301
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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionAugust 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to present minimum criteria
Deck geometry9: Superior to present desirable criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating48.2 US tons
Inventory rating37.1 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length78 ft (23.8 m)
Longest span30 ft (9.1 m)
Deck width64 ft (19.6 m)
Roadway width48 ft (14.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic8,443 (2023)
Projected traffic9,287 by 2043
Trucks2%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed1.2 mi (2 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—
NavigationNo navigation control on waterway

Frequently asked questions

When was P 86-BRIDGER DR over East Gallatin River built?

It was built in 1984, making it 41 years old in 2025.

What condition is P 86-BRIDGER DR over East Gallatin River 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 August 2023.

How much traffic does P 86-BRIDGER DR over East Gallatin River carry?

About 8,443 vehicles per day (2023 count), of which roughly 2% are trucks.

How long is P 86-BRIDGER DR over East Gallatin River?

The structure is 78 ft (23.8 m) long with a longest span of 30 ft (9.1 m) and a deck 64 ft wide.

Who owns P 86-BRIDGER DR over East Gallatin River?

It is owned by the State Highway Agency.