US Bridges

Cabin Creek RD over Cabin Creek

Fair

Prairie County, Montana · 19M SE Fallon · Structure no. S00504012+05151

Built
1988
37 years old
Condition
Fair
inspected October 2024
Type
Culvert
Steel
Length
30 ft
2 main spans
Daily traffic
27
2023 count
Owner
County
County Highway Agency

About this bridge

Cabin Creek RD over Cabin Creek is a steel culvert carrying Cabin Creek RD over Cabin Creek in Prairie County, Montana. It was built in 1988, so it is 37 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 27 vehicles a day, roughly 19% of them trucks, projected to reach 28 by 2043. The structure is 30 ft (9.1 m) long. If it were closed, the detour would be 19.9 mi (32 km).

CarriesCabin Creek RD
CrossesCabin Creek
Location19M SE Fallon
RouteCounty Highway 504
StateMontana
Coordinates46.77169, -104.78367
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
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionOctober 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating53.2 US tons
Inventory rating46.1 US tons

Structure

Structure typeCulvert
MaterialSteel
DeckNot applicable
Main spans2
Design loadHL 93
Structure length30 ft (9.1 m)
Longest span13 ft (4 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic27 (2023)
Projected traffic28 by 2043
Trucks19%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed19.9 mi (32 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 Cabin Creek RD over Cabin Creek built?

It was built in 1988, making it 37 years old in 2025.

What condition is Cabin Creek RD over Cabin 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 October 2024.

How much traffic does Cabin Creek RD over Cabin Creek carry?

About 27 vehicles per day (2023 count), of which roughly 19% are trucks.

How long is Cabin Creek RD over Cabin Creek?

The structure is 30 ft (9.1 m) long with a longest span of 13 ft (4 m).

Who owns Cabin Creek RD over Cabin Creek?

It is owned by the County Highway Agency.