US Bridges

Irrsr Nd Highway 6 over Cannonball River

Fair

Morton County, North Dakota · At Breien · Structure no. 0006035187

Built
1984
41 years old
Condition
Fair
inspected June 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete Continuous
Length
445 ft
5 main spans
Daily traffic
535
2019 count
Owner
State
State Highway Agency

About this bridge

Irrsr Nd Highway 6 over Cannonball River is a prestressed concrete continuous stringer/multi-beam or girder carrying Irrsr Nd Highway 6 over Cannonball River in Morton County, North Dakota. It was built in 1984, so it is 41 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 535 vehicles a day, roughly 14% of them trucks, projected to reach 600 by 2039. The structure is 445 ft (135.6 m) long and 35 ft wide. If it were closed, the detour would be 31.7 mi (51 km).

CarriesIrrsr Nd Highway 6
CrossesCannonball River
LocationAt Breien
RouteState Highway 6
Coordinates46.37654, -100.93468
Functional classRural Minor Arterial

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.
Substructure7 GoodSome minor problems.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJune 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating99 US tons
Inventory rating75.9 US tons

Structure

MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans5
Design loadHS 20
Structure length445 ft (135.6 m)
Longest span87 ft (26.5 m)
Deck width35 ft (10.6 m)
Roadway width32 ft (9.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic535 (2019)
Projected traffic600 by 2039
Trucks14%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed31.7 mi (51 km)
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerState Highway Agency
Maintained byState 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 Irrsr Nd Highway 6 over Cannonball River built?

It was built in 1984, making it 41 years old in 2025.

What condition is Irrsr Nd Highway 6 over 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 2024.

How much traffic does Irrsr Nd Highway 6 over Cannonball River carry?

About 535 vehicles per day (2019 count), of which roughly 14% are trucks.

How long is Irrsr Nd Highway 6 over Cannonball River?

The structure is 445 ft (135.6 m) long with a longest span of 87 ft (26.5 m) and a deck 35 ft wide.

Who owns Irrsr Nd Highway 6 over Cannonball River?

It is owned by the State Highway Agency.