US Bridges

County Highway over Trib of Cannonball River

Fair

Slope County, North Dakota · 4 North 19 East Amidon · Structure no. 000000044154050

Built
2000
25 years old
Condition
Fair
inspected June 2021
Type
Culvert
Concrete
Length
23 ft
2 main spans
Daily traffic
100
2018 count
Owner
County
County Highway Agency

About this bridge

County Highway over Trib of Cannonball River is a concrete culvert carrying County Highway over Trib of Cannonball River in Slope County, North Dakota. It was built in 2000, so it is 25 years old, younger than the North Dakota average of 48.2 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 100 vehicles a day, roughly 10% of them trucks, projected to reach 100 by 2038. The structure is 23 ft (7 m) long. If it were closed, the detour would be 3.7 mi (6 km).

Location

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CarriesCounty Highway
CrossesTrib of Cannonball River
Location4 North 19 East Amidon
RouteCounty Highway 0
CountySlope County
StateNorth Dakota
Coordinates46.55517, -102.93152
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
Channel and channel protection8 Very GoodNo problems noted.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJune 2021
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating110.1 US tons
Inventory rating63.7 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans2
Design loadHS 25 or greater
Structure length23 ft (7 m)
Longest span11 ft (3.4 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic100 (2018)
Projected traffic100 by 2038
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.7 mi (6 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 County Highway over Trib of Cannonball River built?

It was built in 2000, making it 25 years old in 2025.

What condition is County Highway over Trib of Cannonball River 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 June 2021.

How much traffic does County Highway over Trib of Cannonball River carry?

About 100 vehicles per day (2018 count), of which roughly 10% are trucks.

How long is County Highway over Trib of Cannonball River?

The structure is 23 ft (7 m) long with a longest span of 11 ft (3.4 m).

Who owns County Highway over Trib of Cannonball River?

It is owned by the County Highway Agency.