US Bridges

County Highway over I-29/MINTO Interchange

Fair

Walsh County, North Dakota · 7 North Nd 54 · Structure no. 0029167722

Built
1971
54 years old, rebuilt 2024
Condition
Fair
inspected April 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
235 ft
2 main spans
Daily traffic
220
2019 count
Owner
State
State Highway Agency

About this bridge

County Highway over I-29/MINTO Interchange is a steel continuous stringer/multi-beam or girder carrying County Highway over I-29/MINTO Interchange in Walsh County, North Dakota. It was built in 1971 and reconstructed in 2024, so it is 54 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 220 vehicles a day, roughly 14% of them trucks, projected to reach 230 by 2039. The structure is 235 ft (71.6 m) long and 32 ft wide. If it were closed, the detour would be 14.3 mi (23 km).

Location

Open in Google Maps
CarriesCounty Highway
CrossesI-29/MINTO Interchange
Location7 North Nd 54
RouteCounty Highway 5018
CountyWalsh County
StateNorth Dakota
Coordinates48.2953, -97.18904
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
Deck8 Very GoodNo problems noted.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure7 GoodSome minor problems.
Last inspectionApril 2023
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 rating46.2 US tons
Inventory rating27.6 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadH 20
Structure length235 ft (71.6 m)
Longest span114 ft (34.7 m)
Deck width32 ft (9.9 m)
Roadway width30 ft (9.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic220 (2019)
Projected traffic230 by 2039
Trucks14%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesOverpass structure at an interchange
CrossesHighway
Detour if closed14.3 mi (23 km)
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/MINTO Interchange built?

It was built in 1971, making it 54 years old in 2025. It was reconstructed in 2024.

What condition is County Highway over I-29/MINTO 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 2023.

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

About 220 vehicles per day (2019 count), of which roughly 14% are trucks.

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

The structure is 235 ft (71.6 m) long with a longest span of 114 ft (34.7 m) and a deck 32 ft wide.

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

It is owned by the State Highway Agency.