US Bridges

Cottonwood CR RD over Box Elder Creek 022

Good

Carter County, Montana · 18M NE Hammond · Structure no. L06042000+03001

Built
2010
15 years old
Condition
Good
inspected August 2023
Type
Channel Beam
Prestressed Concrete
Length
102 ft
3 main spans
Daily traffic
100
2025 count
Owner
County
County Highway Agency

About this bridge

Cottonwood CR RD over Box Elder Creek 022 is a prestressed concrete channel beam carrying Cottonwood CR RD over Box Elder Creek 022 in Carter 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 good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 100 vehicles a day, roughly 3% of them trucks, projected to reach 100 by 2040. The structure is 102 ft (31.1 m) long and 26 ft wide. If it were closed, the detour would be 21.1 mi (34 km).

CarriesCottonwood CR RD
CrossesBox Elder Creek 022
Location18M NE Hammond
RouteCounty Highway 6042
StateMontana
Coordinates45.37339, -104.67723
Functional classRural Local

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionAugust 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment4: Meets minimum tolerable limits to be left in place as is
Operating rating49.1 US tons
Inventory rating35.1 US tons

Structure

Structure typeChannel Beam
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans3
Design loadHL 93
Structure length102 ft (31.1 m)
Longest span33 ft (10.1 m)
Deck width26 ft (8 m)
Roadway width24 ft (7.3 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 closed21.1 mi (34 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 Cottonwood CR RD over Box Elder Creek 022 built?

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

What condition is Cottonwood CR RD over Box Elder Creek 022 in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in August 2023.

How much traffic does Cottonwood CR RD over Box Elder Creek 022 carry?

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

How long is Cottonwood CR RD over Box Elder Creek 022?

The structure is 102 ft (31.1 m) long with a longest span of 33 ft (10.1 m) and a deck 26 ft wide.

Who owns Cottonwood CR RD over Box Elder Creek 022?

It is owned by the County Highway Agency.