US Bridges

Amsterdam RD over Baker Creek

Fair

Gallatin County, Montana · 4M SW Belgrade · Structure no. S00347002+07001

Built
1952
73 years old
Condition
Fair
inspected April 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
97 ft
2 main spans
Daily traffic
1,889
2023 count
Owner
County
County Highway Agency

About this bridge

Amsterdam RD over Baker Creek is a steel continuous stringer/multi-beam or girder carrying Amsterdam RD over Baker Creek in Gallatin County, Montana. It was built in 1952, so it is 73 years old, older 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 1,889 vehicles a day, roughly 2% of them trucks, projected to reach 1,983 by 2043. The structure is 97 ft (29.5 m) long and 27 ft wide. If it were closed, the detour would be 9.9 mi (16 km).

Location

Open in Google Maps
CarriesAmsterdam RD
CrossesBaker Creek
Location4M SW Belgrade
RouteCounty Highway 347
CountyGallatin County
StateMontana
Coordinates45.77273, -111.25399
Functional classRural Major Collector

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 protection8 Very GoodNo problems noted.
Last inspectionApril 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 geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating41 US tons
Inventory rating25 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, precast panels
Main spans2
Design loadH 15
Structure length97 ft (29.5 m)
Longest span47 ft (14.3 m)
Deck width27 ft (8.1 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,889 (2023)
Projected traffic1,983 by 2043
Trucks2%
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 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 Amsterdam RD over Baker Creek built?

It was built in 1952, making it 73 years old in 2025.

What condition is Amsterdam RD over Baker Creek 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 April 2023.

How much traffic does Amsterdam RD over Baker Creek carry?

About 1,889 vehicles per day (2023 count), of which roughly 2% are trucks.

How long is Amsterdam RD over Baker Creek?

The structure is 97 ft (29.5 m) long with a longest span of 47 ft (14.3 m) and a deck 27 ft wide.

Who owns Amsterdam RD over Baker Creek?

It is owned by the County Highway Agency.