US Bridges

Interstate 29 over Drainage Ditch

Good

Cass County, North Dakota · 1 South of Gardner · Structure no. 0029084749

Built
1968
57 years old, rebuilt 2015
Condition
Good
inspected August 2024
Type
Culvert
Concrete
Length
27 ft
3 main spans
Daily traffic
9,000
2019 count
Owner
State
State Highway Agency

About this bridge

Interstate 29 over Drainage Ditch is a concrete culvert carrying Interstate 29 over Drainage Ditch in Cass County, North Dakota. It was built in 1968 and reconstructed in 2015, so it is 57 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 9,000 vehicles a day, roughly 19% of them trucks, projected to reach 9,000 by 2039. The structure is 27 ft (8.2 m) long. If it were closed, the detour would be 3.7 mi (6 km).

CarriesInterstate 29
CrossesDrainage Ditch
Location1 South of Gardner
RouteInterstate 29
Coordinates47.13721, -96.96608
Functional classRural Principal Arterial - Interstate

Condition and inspection

Good

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

ComponentRatingMeaning
Channel and channel protection7 GoodSome minor problems.
Culvert7 GoodSome minor problems.
Last inspectionAugust 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating110.1 US tons
Inventory rating60 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans3
Design loadHS 20
Structure length27 ft (8.2 m)
Longest span8 ft (2.4 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic9,000 (2019)
Projected traffic9,000 by 2039
Trucks19%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.7 mi (6 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—
NavigationNo navigation control on waterway

Frequently asked questions

When was Interstate 29 over Drainage Ditch built?

It was built in 1968, making it 57 years old in 2025. It was reconstructed in 2015.

What condition is Interstate 29 over Drainage Ditch 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 August 2024.

How much traffic does Interstate 29 over Drainage Ditch carry?

About 9,000 vehicles per day (2019 count), of which roughly 19% are trucks.

How long is Interstate 29 over Drainage Ditch?

The structure is 27 ft (8.2 m) long with a longest span of 8 ft (2.4 m).

Who owns Interstate 29 over Drainage Ditch?

It is owned by the State Highway Agency.