US Bridges

Little Missouri RD over Little Missouri Riv 009

Fair

Carter County, Montana · 15M SW Capitol · Structure no. L06090006+06001

Built
1989
36 years old
Condition
Fair
inspected December 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
133 ft
3 main spans
Daily traffic
42
2023 count
Owner
County
County Highway Agency

About this bridge

Little Missouri RD over Little Missouri Riv 009 is a prestressed concrete stringer/multi-beam or girder carrying Little Missouri RD over Little Missouri Riv 009 in Carter County, Montana. It was built in 1989, so it is 36 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 42 vehicles a day, roughly 3% of them trucks, projected to reach 44 by 2043. The structure is 133 ft (40.6 m) long and 30 ft wide. If it were closed, the detour would be 123.7 mi (199 km).

Location

Open in Google Maps
CarriesLittle Missouri RD
CrossesLittle Missouri Riv 009
Location15M SW Capitol
RouteCounty Highway 6090
CountyCarter County
StateMontana
Coordinates45.25531, -104.19493
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.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionDecember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating54 US tons
Inventory rating28 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length133 ft (40.6 m)
Longest span51 ft (15.5 m)
Deck width30 ft (9.2 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic42 (2023)
Projected traffic44 by 2043
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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Little Missouri RD over Little Missouri Riv 009 built?

It was built in 1989, making it 36 years old in 2025.

What condition is Little Missouri RD over Little Missouri Riv 009 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 December 2024.

How much traffic does Little Missouri RD over Little Missouri Riv 009 carry?

About 42 vehicles per day (2023 count), of which roughly 3% are trucks.

How long is Little Missouri RD over Little Missouri Riv 009?

The structure is 133 ft (40.6 m) long with a longest span of 51 ft (15.5 m) and a deck 30 ft wide.

Who owns Little Missouri RD over Little Missouri Riv 009?

It is owned by the County Highway Agency.