US Bridges

S 9th ST W over Dodson South Canal 096

FairPosted for load

Phillips County, Montana · SW MALTA-9th ST · Structure no. M36076000+00101

Built
1950
75 years old, rebuilt 1980
Condition
Fair
inspected November 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
54 ft
3 main spans
Daily traffic
100
2025 count
Owner
County
County Highway Agency

About this bridge

S 9th ST W over Dodson South Canal 096 is a steel stringer/multi-beam or girder carrying S 9th ST W over Dodson South Canal 096 in Phillips County, Montana. It was built in 1950 and reconstructed in 1980, so it is 75 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 5 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. Its operating status is: posted for load restriction.

It carries about 100 vehicles a day, roughly 3% of them trucks, projected to reach 100 by 2040. The structure is 54 ft (16.5 m) long and 20 ft wide. If it were closed, the detour would be 123.7 mi (199 km).

CarriesS 9th ST W
CrossesDodson South Canal 096
LocationSW MALTA-9th ST
RouteCounty Highway 36469
StateMontana
Coordinates48.35129, -107.88146
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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionNovember 2024
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating38 US tons
Inventory rating27 US tons

Structure

MaterialSteel
DeckCorrugated steel
Main spans3
Design loadUnknown
Structure length54 ft (16.5 m)
Longest span18 ft (5.5 m)
Deck width20 ft (6.1 m)
Roadway width19 ft (5.8 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 closed123.7 mi (199 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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$76,000
NavigationNo navigation control on waterway

Frequently asked questions

When was S 9th ST W over Dodson South Canal 096 built?

It was built in 1950, making it 75 years old in 2025. It was reconstructed in 1980.

What condition is S 9th ST W over Dodson South Canal 096 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 November 2024.

How much traffic does S 9th ST W over Dodson South Canal 096 carry?

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

How long is S 9th ST W over Dodson South Canal 096?

The structure is 54 ft (16.5 m) long with a longest span of 18 ft (5.5 m) and a deck 20 ft wide.

Who owns S 9th ST W over Dodson South Canal 096?

It is owned by the County Highway Agency.