US Bridges

Interstate 94 over Missouri River

Fair

Morton County, North Dakota · 3 West of US 83 North · Structure no. 0094156609

Built
1965
60 years old, rebuilt 2016
Condition
Fair
inspected August 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
1,125 ft
7 main spans
Daily traffic
24,125
2019 count
Owner
State
State Highway Agency

About this bridge

Interstate 94 over Missouri River is a steel stringer/multi-beam or girder carrying Interstate 94 over Missouri River in Morton County, North Dakota. It was built in 1965 and reconstructed in 2016, so it is 60 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 24,125 vehicles a day, roughly 9% of them trucks, projected to reach 34,605 by 2039. The structure is 1,125 ft (342.9 m) long and 65 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

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CarriesInterstate 94
CrossesMissouri River
Location3 West of US 83 North
RouteInterstate 94
CountyMorton County
StateNorth Dakota
Coordinates46.82334, -100.83035
Functional classUrban 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
Deck7 GoodSome minor problems.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionAugust 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating41.9 US tons
Inventory rating25.1 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans7
Design loadHS 20
Structure length1,125 ft (342.9 m)
Longest span233 ft (71 m)
Deck width65 ft (19.8 m)
Roadway width60 ft (18.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic24,125 (2019)
Projected traffic34,605 by 2039
Trucks9%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway and waterway
Detour if closed3.1 mi (5 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—
NavigationNavigation control on waterway (bridge permit required)

Frequently asked questions

When was Interstate 94 over Missouri River built?

It was built in 1965, making it 60 years old in 2025. It was reconstructed in 2016.

What condition is Interstate 94 over Missouri 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 August 2024.

How much traffic does Interstate 94 over Missouri River carry?

About 24,125 vehicles per day (2019 count), of which roughly 9% are trucks.

How long is Interstate 94 over Missouri River?

The structure is 1,125 ft (342.9 m) long with a longest span of 233 ft (71 m) and a deck 65 ft wide.

Who owns Interstate 94 over Missouri River?

It is owned by the State Highway Agency.