US Bridges

W Cameron Br RD over Gallatin River 048

Fair

Gallatin County, Montana · 1M SW Belgrade · Structure no. L16403001+09001

Built
2007
18 years old
Condition
Fair
inspected January 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
152 ft
1 main span
Daily traffic
100
2025 count
Owner
County
County Highway Agency

About this bridge

W Cameron Br RD over Gallatin River 048 is a prestressed concrete stringer/multi-beam or girder carrying W Cameron Br RD over Gallatin River 048 in Gallatin County, Montana. It was built in 2007, so it is 18 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 5 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 100 vehicles a day, roughly 3% of them trucks, projected to reach 100 by 2040. The structure is 152 ft (46.2 m) long and 30 ft wide. If it were closed, the detour would be 9.9 mi (16 km).

CarriesW Cameron Br RD
CrossesGallatin River 048
Location1M SW Belgrade
RouteCounty Highway 16403
StateMontana
Coordinates45.74346, -111.22555
Functional classRural Local

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionJanuary 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation7: Better than present minimum criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating36 US tons
Inventory rating36 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length152 ft (46.2 m)
Longest span150 ft (45.7 m)
Deck width30 ft (9.2 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic100 (2025)
Projected traffic100 by 2040
Trucks3%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed9.9 mi (16 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusEligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost$210,000
NavigationNo navigation control on waterway

Frequently asked questions

When was W Cameron Br RD over Gallatin River 048 built?

It was built in 2007, making it 18 years old in 2025.

What condition is W Cameron Br RD over Gallatin River 048 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 January 2024.

How much traffic does W Cameron Br RD over Gallatin River 048 carry?

About 100 vehicles per day (2025 count), of which roughly 3% are trucks.

How long is W Cameron Br RD over Gallatin River 048?

The structure is 152 ft (46.2 m) long with a longest span of 150 ft (45.7 m) and a deck 30 ft wide.

Who owns W Cameron Br RD over Gallatin River 048?

It is owned by the County Highway Agency.