US Bridges

US Highway 85 over Missouri River-Bnrr

Fair

McKenzie County, North Dakota · 2 South of US 2 · Structure no. 0085181526

Built
2017
8 years old
Condition
Fair
inspected August 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
1,522 ft
6 main spans
Daily traffic
6,677
2022 count
Owner
State
State Highway Agency

About this bridge

US Highway 85 over Missouri River-Bnrr is a steel continuous stringer/multi-beam or girder carrying US Highway 85 over Missouri River-Bnrr in McKenzie County, North Dakota. It was built in 2017, so it is 8 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 6,677 vehicles a day, roughly 13% of them trucks, projected to reach 21,400 by 2039. The structure is 1,522 ft (464 m) long and 85 ft wide. If it were closed, the detour would be 29.2 mi (47 km).

Location

Open in Google Maps
CarriesUS Highway 85
CrossesMissouri River-Bnrr
Location2 South of US 2
RouteState Highway 85
CountyMcKenzie County
StateNorth Dakota
Coordinates48.10889, -103.7173
Functional classRural Principal Arterial - Other

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.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionAugust 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry9: Superior to present desirable criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating39.4 US tons
Inventory rating30.3 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans6
Design loadHL 93
Structure length1,522 ft (464 m)
Longest span270 ft (82.3 m)
Deck width85 ft (25.8 m)
Roadway width80 ft (24.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic6,677 (2022)
Projected traffic21,400 by 2039
Trucks13%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesRailroad and waterway
Detour if closed29.2 mi (47 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 US Highway 85 over Missouri River-Bnrr built?

It was built in 2017, making it 8 years old in 2025.

What condition is US Highway 85 over Missouri River-Bnrr 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 2023.

How much traffic does US Highway 85 over Missouri River-Bnrr carry?

About 6,677 vehicles per day (2022 count), of which roughly 13% are trucks.

How long is US Highway 85 over Missouri River-Bnrr?

The structure is 1,522 ft (464 m) long with a longest span of 270 ft (82.3 m) and a deck 85 ft wide.

Who owns US Highway 85 over Missouri River-Bnrr?

It is owned by the State Highway Agency.