US Bridges

County Highway over I-29/GRANDIN Interchange

Good

Traill County, North Dakota · 8 South of Nd 200 · Structure no. 0029092142

Built
1970
55 years old, rebuilt 2007
Condition
Good
inspected April 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
280 ft
4 main spans
Daily traffic
820
2019 count
Owner
State
State Highway Agency

About this bridge

County Highway over I-29/GRANDIN Interchange is a steel continuous stringer/multi-beam or girder carrying County Highway over I-29/GRANDIN Interchange in Traill County, North Dakota. It was built in 1970 and reconstructed in 2007, so it is 55 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 good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 820 vehicles a day, roughly 10% of them trucks, projected to reach 950 by 2039. The structure is 280 ft (85.3 m) long and 35 ft wide.

Location

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CarriesCounty Highway
CrossesI-29/GRANDIN Interchange
Location8 South of Nd 200
RouteCounty Highway 941
CountyTraill County
StateNorth Dakota
Coordinates47.2388, -97.01023
Functional classRural Major Collector

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Last inspectionApril 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating53.7 US tons
Inventory rating32.2 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadH 20
Structure length280 ft (85.3 m)
Longest span101 ft (30.8 m)
Deck width35 ft (10.6 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic820 (2019)
Projected traffic950 by 2039
Trucks10%
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 proposedNone recorded
Estimated improvement cost—
NavigationNot applicable (no waterway)

Frequently asked questions

When was County Highway over I-29/GRANDIN Interchange built?

It was built in 1970, making it 55 years old in 2025. It was reconstructed in 2007.

What condition is County Highway over I-29/GRANDIN Interchange in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in April 2024.

How much traffic does County Highway over I-29/GRANDIN Interchange carry?

About 820 vehicles per day (2019 count), of which roughly 10% are trucks.

How long is County Highway over I-29/GRANDIN Interchange?

The structure is 280 ft (85.3 m) long with a longest span of 101 ft (30.8 m) and a deck 35 ft wide.

Who owns County Highway over I-29/GRANDIN Interchange?

It is owned by the State Highway Agency.