US Bridges

County Highway over I-29/GARDNER Interchange

Fair

Cass County, North Dakota · Gardner City Limits · Structure no. 0029085826

Built
1970
55 years old, rebuilt 1983
Condition
Fair
inspected April 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
275 ft
4 main spans
Daily traffic
800
2019 count
Owner
State
State Highway Agency

About this bridge

County Highway over I-29/GARDNER Interchange is a steel continuous stringer/multi-beam or girder carrying County Highway over I-29/GARDNER Interchange in Cass County, North Dakota. It was built in 1970 and reconstructed in 1983, 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 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 800 vehicles a day, roughly 12% of them trucks, projected to reach 800 by 2039. The structure is 275 ft (83.8 m) long and 35 ft wide.

Location

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CarriesCounty Highway
CrossesI-29/GARDNER Interchange
LocationGardner City Limits
RouteCounty Highway 910
CountyCass County
StateNorth Dakota
Coordinates47.15169, -96.97454
Functional classRural Major Collector

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.
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 alignment7: Better than present minimum criteria
Operating rating60.5 US tons
Inventory rating36.3 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadH 20
Structure length275 ft (83.8 m)
Longest span98 ft (29.9 m)
Deck width35 ft (10.6 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic800 (2019)
Projected traffic800 by 2039
Trucks12%
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/GARDNER Interchange built?

It was built in 1970, making it 55 years old in 2025. It was reconstructed in 1983.

What condition is County Highway over I-29/GARDNER Interchange 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 April 2024.

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

About 800 vehicles per day (2019 count), of which roughly 12% are trucks.

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

The structure is 275 ft (83.8 m) long with a longest span of 98 ft (29.9 m) and a deck 35 ft wide.

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

It is owned by the State Highway Agency.