US Bridges

I-94 Business Loop over Missouri River

Fair

Burleigh County, North Dakota · Between Bismarck & Mandan · Structure no. 0094920914

Built
2008
17 years old
Condition
Fair
inspected August 2024
Type
Box Beam or Girders - Single or Spread
Steel
Length
2,369 ft
6 main spans
Daily traffic
14,700
2019 count
Owner
State
State Highway Agency

About this bridge

I-94 Business Loop over Missouri River is a steel box beam or girders - single or spread carrying I-94 Business Loop over Missouri River in Burleigh County, North Dakota. It was built in 2008, so it is 17 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 14,700 vehicles a day, roughly 4% of them trucks, projected to reach 17,250 by 2039. The structure is 2,369 ft (722.1 m) long and 85 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

Open in Google Maps
CarriesI-94 Business Loop
CrossesMissouri River
LocationBetween Bismarck & Mandan
RouteInterstate 94
CountyBurleigh County
StateNorth Dakota
Coordinates46.80794, -100.81909
Functional classUrban Other Principal 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.
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 geometry9: Superior to present desirable criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating44.4 US tons
Inventory rating26.6 US tons

Structure

Structure typeBox Beam or Girders - Single or Spread
MaterialSteel
DeckConcrete, cast-in-place
Main spans6 (+8 approach)
Design loadHS 25 or greater
Structure length2,369 ft (722.1 m)
Longest span285 ft (86.9 m)
Deck width85 ft (25.8 m)
Roadway width68 ft (20.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic14,700 (2019)
Projected traffic17,250 by 2039
Trucks4%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesHighway and waterway
Detour if closed5 mi (8 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—
NavigationNavigation control on waterway (bridge permit required)

Frequently asked questions

When was I-94 Business Loop over Missouri River built?

It was built in 2008, making it 17 years old in 2025.

What condition is I-94 Business Loop 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 I-94 Business Loop over Missouri River carry?

About 14,700 vehicles per day (2019 count), of which roughly 4% are trucks.

How long is I-94 Business Loop over Missouri River?

The structure is 2,369 ft (722.1 m) long with a longest span of 285 ft (86.9 m) and a deck 85 ft wide.

Who owns I-94 Business Loop over Missouri River?

It is owned by the State Highway Agency.