US Bridges

Little Missouri RD over Horse Creek 008

Fair

Carter County, Montana · 16M NE Alzada · Structure no. L06090003+07001

Built
2012
13 years old
Condition
Fair
inspected August 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
50 ft
1 main span
Daily traffic
42
2023 count
Owner
County
County Highway Agency

About this bridge

Little Missouri RD over Horse Creek 008 is a steel stringer/multi-beam or girder carrying Little Missouri RD over Horse Creek 008 in Carter County, Montana. It was built in 2012, so it is 13 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 50 ft (15.3 m) long and 25 ft wide. If it were closed, the detour would be 123.7 mi (199 km).

CarriesLittle Missouri RD
CrossesHorse Creek 008
Location16M NE Alzada
RouteCounty Highway 6090
StateMontana
Coordinates45.22823, -104.22497
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
Deck7 GoodSome minor problems.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionAugust 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating40 US tons
Inventory rating31 US tons

Structure

MaterialSteel
DeckCorrugated steel
Main spans1
Design loadHS 20
Structure length50 ft (15.3 m)
Longest span49 ft (14.8 m)
Deck width25 ft (7.7 m)
Roadway width24 ft (7.3 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 Horse Creek 008 built?

It was built in 2012, making it 13 years old in 2025.

What condition is Little Missouri RD over Horse Creek 008 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 2023.

How much traffic does Little Missouri RD over Horse Creek 008 carry?

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

How long is Little Missouri RD over Horse Creek 008?

The structure is 50 ft (15.3 m) long with a longest span of 49 ft (14.8 m) and a deck 25 ft wide.

Who owns Little Missouri RD over Horse Creek 008?

It is owned by the County Highway Agency.