US Bridges

Assiniboine RD over Assiniboine Creek 068

FairPosted for load

Phillips County, Montana · 7M N Malta · Structure no. L36009001+01001

Built
1985
40 years old
Condition
Fair
inspected April 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
69 ft
4 main spans
Daily traffic
29
2023 count
Owner
County
County Highway Agency

About this bridge

Assiniboine RD over Assiniboine Creek 068 is a steel stringer/multi-beam or girder carrying Assiniboine RD over Assiniboine Creek 068 in Phillips County, Montana. It was built in 1985, so it is 40 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 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 29 vehicles a day, roughly 3% of them trucks, projected to reach 31 by 2043. The structure is 69 ft (21 m) long and 20 ft wide. If it were closed, the detour would be 39.8 mi (64 km).

CarriesAssiniboine RD
CrossesAssiniboine Creek 068
Location7M N Malta
RouteCounty Highway 36002
StateMontana
Coordinates48.44314, -107.84192
Functional classRural Minor 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.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection7 GoodSome minor problems.
Last inspectionApril 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 adequacy7: Better than present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating39 US tons
Inventory rating23 US tons

Structure

MaterialSteel
DeckCorrugated steel
Main spans4
Design loadHS 20
Structure length69 ft (21 m)
Longest span19 ft (5.8 m)
Deck width20 ft (6.1 m)
Roadway width19 ft (5.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic29 (2023)
Projected traffic31 by 2043
Trucks3%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed39.8 mi (64 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 Assiniboine RD over Assiniboine Creek 068 built?

It was built in 1985, making it 40 years old in 2025.

What condition is Assiniboine RD over Assiniboine Creek 068 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 2024.

How much traffic does Assiniboine RD over Assiniboine Creek 068 carry?

About 29 vehicles per day (2023 count), of which roughly 3% are trucks.

How long is Assiniboine RD over Assiniboine Creek 068?

The structure is 69 ft (21 m) long with a longest span of 19 ft (5.8 m) and a deck 20 ft wide.

Who owns Assiniboine RD over Assiniboine Creek 068?

It is owned by the County Highway Agency.