US Bridges

S 294 over Martinsdale Supply Canal

Fair

Meagher County, Montana · Martinsdale · Structure no. S00294027+02001

Built
2010
15 years old
Condition
Fair
inspected August 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
62 ft
1 main span
Daily traffic
307
2023 count
Owner
State
State Highway Agency

About this bridge

S 294 over Martinsdale Supply Canal is a prestressed concrete stringer/multi-beam or girder carrying S 294 over Martinsdale Supply Canal in Meagher County, Montana. It was built in 2010, so it is 15 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 307 vehicles a day, roughly 8% of them trucks, projected to reach 336 by 2043. The structure is 62 ft (19 m) long and 31 ft wide. If it were closed, the detour would be 78.3 mi (126 km).

CarriesS 294
CrossesMartinsdale Supply Canal
LocationMartinsdale
RouteState Highway 294
StateMontana
Coordinates46.46077, -110.31897
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.
Superstructure8 Very GoodNo problems noted.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionAugust 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating95 US tons
Inventory rating67 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20 + Mod
Structure length62 ft (19 m)
Longest span59 ft (18 m)
Deck width31 ft (9.4 m)
Roadway width28 ft (8.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic307 (2023)
Projected traffic336 by 2043
Trucks8%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed78.3 mi (126 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 S 294 over Martinsdale Supply Canal built?

It was built in 2010, making it 15 years old in 2025.

What condition is S 294 over Martinsdale Supply Canal 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 2024.

How much traffic does S 294 over Martinsdale Supply Canal carry?

About 307 vehicles per day (2023 count), of which roughly 8% are trucks.

How long is S 294 over Martinsdale Supply Canal?

The structure is 62 ft (19 m) long with a longest span of 59 ft (18 m) and a deck 31 ft wide.

Who owns S 294 over Martinsdale Supply Canal?

It is owned by the State Highway Agency.