US Bridges

Interstate 94 over Bn Railroad Separation

Fair

Kidder County, North Dakota · 6 West of Nd 30 · Structure no. 0094222290 L

Built
1958
67 years old, rebuilt 1987
Condition
Fair
inspected November 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete Continuous
Length
242 ft
4 main spans
Daily traffic
3,150
2020 count
Owner
State
State Highway Agency

About this bridge

Interstate 94 over Bn Railroad Separation is a prestressed concrete continuous stringer/multi-beam or girder carrying Interstate 94 over Bn Railroad Separation in Kidder County, North Dakota. It was built in 1958 and reconstructed in 1987, so it is 67 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 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 3,150 vehicles a day, roughly 23% of them trucks, projected to reach 3,150 by 2040. The structure is 242 ft (73.8 m) long and 45 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesInterstate 94
CrossesBn Railroad Separation
Location6 West of Nd 30
RouteInterstate 94
Coordinates46.87611, -99.46679
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
Deck7 GoodSome minor problems.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionNovember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry7: Better than present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating77.8 US tons
Inventory rating43 US tons

Structure

MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length242 ft (73.8 m)
Longest span62 ft (18.9 m)
Deck width45 ft (13.7 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,150 (2020)
Projected traffic3,150 by 2040
Trucks23%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesRailroad
Detour if closed1.2 mi (2 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 Bn Railroad Separation built?

It was built in 1958, making it 67 years old in 2025. It was reconstructed in 1987.

What condition is Interstate 94 over Bn Railroad 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 November 2024.

How much traffic does Interstate 94 over Bn Railroad Separation carry?

About 3,150 vehicles per day (2020 count), of which roughly 23% are trucks.

How long is Interstate 94 over Bn Railroad Separation?

The structure is 242 ft (73.8 m) long with a longest span of 62 ft (18.9 m) and a deck 45 ft wide.

Who owns Interstate 94 over Bn Railroad Separation?

It is owned by the State Highway Agency.