US Bridges

Montana Creek Road over South Fork Fish CR

Fair

Mineral County, Montana · Montana Creek Road · Structure no. 011604000000127

Built
1973
52 years old
Condition
Fair
inspected September 2024
Type
Stringer/Multi-beam or Girder
Wood or Timber
Length
40 ft
1 main span
Daily traffic
50
Owner
Federal
U.S. Forest Service

About this bridge

Montana Creek Road over South Fork Fish CR is a wood or timber stringer/multi-beam or girder carrying Montana Creek Road over South Fork Fish CR in Mineral County, Montana. It was built in 1973, so it is 52 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 50 vehicles a day, projected to reach 75 by 2045. The structure is 40 ft (12.3 m) long and 16 ft wide. If it were closed, the detour would be 98.2 mi (158 km).

Location

Open in Google Maps
CarriesMontana Creek Road
CrossesSouth Fork Fish CR
LocationMontana Creek Road
RouteFederal Lands Road 4218
CountyMineral County
StateMontana
Coordinates46.81846, -114.65081
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionSeptember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; action required to protect exposed foundations
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating43.5 US tons
Inventory rating33.6 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialWood or Timber
DeckWood or timber
Main spans1
Design loadHS 20
Structure length40 ft (12.3 m)
Longest span39 ft (11.9 m)
Deck width16 ft (4.9 m)
Roadway width14 ft (4.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic50 (—)
Projected traffic75 by 2045
Trucks—
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed98.2 mi (158 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerU.S. Forest Service
Maintained byU.S. Forest Service
Historic statusHistorical significance not determinable at this time
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Montana Creek Road over South Fork Fish CR built?

It was built in 1973, making it 52 years old in 2025.

What condition is Montana Creek Road over South Fork Fish CR 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 September 2024.

How much traffic does Montana Creek Road over South Fork Fish CR carry?

About 50 vehicles per day (latest count).

How long is Montana Creek Road over South Fork Fish CR?

The structure is 40 ft (12.3 m) long with a longest span of 39 ft (11.9 m) and a deck 16 ft wide.

Who owns Montana Creek Road over South Fork Fish CR?

It is owned by the U.S. Forest Service.