US Bridges

Bismarck Expwy. over Missouri River

Fair

Burleigh County, North Dakota · 1.0 West of Washington ST · Structure no. 0810000846

Built
1985
40 years old
Condition
Fair
inspected August 2024
Type
Girder and Floorbeam System
Steel Continuous
Length
2,510 ft
11 main spans
Daily traffic
13,000
2019 count
Owner
State
State Highway Agency

About this bridge

Bismarck Expwy. over Missouri River is a steel continuous girder and floorbeam system carrying Bismarck Expwy. over Missouri River in Burleigh County, North Dakota. It was built in 1985, so it is 40 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 5 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 13,000 vehicles a day, roughly 3% of them trucks, projected to reach 10,000 by 2039. The structure is 2,510 ft (765 m) long and 77 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

Open in Google Maps
CarriesBismarck Expwy.
CrossesMissouri River
Location1.0 West of Washington ST
RouteState Highway 810
CountyBurleigh County
StateNorth Dakota
Coordinates46.79658, -100.81965
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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
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 geometry7: Better than present minimum criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating79.3 US tons
Inventory rating47.5 US tons

Structure

Structure typeGirder and Floorbeam System
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans11
Design loadHS 20
Structure length2,510 ft (765 m)
Longest span275 ft (83.8 m)
Deck width77 ft (23.6 m)
Roadway width66 ft (20.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic13,000 (2019)
Projected traffic10,000 by 2039
Trucks3%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
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 Bismarck Expwy. over Missouri River built?

It was built in 1985, making it 40 years old in 2025.

What condition is Bismarck Expwy. 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 Bismarck Expwy. over Missouri River carry?

About 13,000 vehicles per day (2019 count), of which roughly 3% are trucks.

How long is Bismarck Expwy. over Missouri River?

The structure is 2,510 ft (765 m) long with a longest span of 275 ft (83.8 m) and a deck 77 ft wide.

Who owns Bismarck Expwy. over Missouri River?

It is owned by the State Highway Agency.