US Bridges

Nd Highway 18 over I-94/CASSELTON Int

Fair

Cass County, North Dakota · Junction of Nd 18 · Structure no. 0094331226

Built
1960
65 years old, rebuilt 1988
Condition
Fair
inspected October 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete Continuous
Length
220 ft
4 main spans
Daily traffic
2,650
2019 count
Owner
State
State Highway Agency

About this bridge

Nd Highway 18 over I-94/CASSELTON Int is a prestressed concrete continuous stringer/multi-beam or girder carrying Nd Highway 18 over I-94/CASSELTON Int in Cass County, North Dakota. It was built in 1960 and reconstructed in 1988, so it is 65 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 2,650 vehicles a day, roughly 7% of them trucks, projected to reach 1,255 by 2039. The structure is 220 ft (67.1 m) long and 43 ft wide.

Location

Open in Google Maps
CarriesNd Highway 18
CrossesI-94/CASSELTON Int
LocationJunction of Nd 18
RouteState Highway 18
CountyCass County
StateNorth Dakota
Coordinates46.87399, -97.21079
Functional classRural Minor 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.
Superstructure7 GoodSome minor problems.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionOctober 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 geometry6: Equal to present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating89.5 US tons
Inventory rating53.6 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length220 ft (67.1 m)
Longest span65 ft (19.8 m)
Deck width43 ft (13 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,650 (2019)
Projected traffic1,255 by 2039
Trucks7%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesOverpass structure at an interchange
CrossesHighway
Detour if closed—
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedOther structural work, including hydraulic replacements
Estimated improvement cost$168,000
NavigationNot applicable (no waterway)

Frequently asked questions

When was Nd Highway 18 over I-94/CASSELTON Int built?

It was built in 1960, making it 65 years old in 2025. It was reconstructed in 1988.

What condition is Nd Highway 18 over I-94/CASSELTON Int 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 October 2024.

How much traffic does Nd Highway 18 over I-94/CASSELTON Int carry?

About 2,650 vehicles per day (2019 count), of which roughly 7% are trucks.

How long is Nd Highway 18 over I-94/CASSELTON Int?

The structure is 220 ft (67.1 m) long with a longest span of 65 ft (19.8 m) and a deck 43 ft wide.

Who owns Nd Highway 18 over I-94/CASSELTON Int?

It is owned by the State Highway Agency.