US Bridges

Interstate 94 over Rosebud Separation

Fair

Morton County, North Dakota · 4 East of Nd 31 · Structure no. 0094132115 R

Built
1964
61 years old, rebuilt 1985
Condition
Fair
inspected April 2023
Type
Tee Beam
Concrete Continuous
Length
115 ft
3 main spans
Daily traffic
3,250
2019 count
Owner
State
State Highway Agency

About this bridge

Interstate 94 over Rosebud Separation is a concrete continuous tee beam carrying Interstate 94 over Rosebud Separation in Morton County, North Dakota. It was built in 1964 and reconstructed in 1985, so it is 61 years old, older 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 3,250 vehicles a day, roughly 17% of them trucks, projected to reach 3,250 by 2039. The structure is 115 ft (35.1 m) long and 43 ft wide. If it were closed, the detour would be 36 mi (58 km).

CarriesInterstate 94
CrossesRosebud Separation
Location4 East of Nd 31
RouteInterstate 94
Coordinates46.86104, -101.3238
Functional classRural Principal Arterial - Interstate

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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionApril 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating68.6 US tons
Inventory rating41.1 US tons

Structure

Structure typeTee Beam
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length115 ft (35.1 m)
Longest span42 ft (12.8 m)
Deck width43 ft (13.1 m)
Roadway width37 ft (11.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,250 (2019)
Projected traffic3,250 by 2039
Trucks17%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed36 mi (58 km)
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkInterstate STRAHNET route

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—
NavigationNot applicable (no waterway)

Frequently asked questions

When was Interstate 94 over Rosebud Separation built?

It was built in 1964, making it 61 years old in 2025. It was reconstructed in 1985.

What condition is Interstate 94 over Rosebud Separation 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 April 2023.

How much traffic does Interstate 94 over Rosebud Separation carry?

About 3,250 vehicles per day (2019 count), of which roughly 17% are trucks.

How long is Interstate 94 over Rosebud Separation?

The structure is 115 ft (35.1 m) long with a longest span of 42 ft (12.8 m) and a deck 43 ft wide.

Who owns Interstate 94 over Rosebud Separation?

It is owned by the State Highway Agency.