US Bridges

County Highway over I-29/LAKE Ardoch Int

Fair

Walsh County, North Dakota · 3 North Nd 54 · Structure no. 0029163699

Built
1971
54 years old, rebuilt 1998
Condition
Fair
inspected April 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
235 ft
2 main spans
Daily traffic
70
2019 count
Owner
State
State Highway Agency

About this bridge

County Highway over I-29/LAKE Ardoch Int is a steel continuous stringer/multi-beam or girder carrying County Highway over I-29/LAKE Ardoch Int in Walsh County, North Dakota. It was built in 1971 and reconstructed in 1998, 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 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 70 vehicles a day, roughly 12% of them trucks, projected to reach 70 by 2039. The structure is 235 ft (71.6 m) long and 35 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

Location

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CarriesCounty Highway
CrossesI-29/LAKE Ardoch Int
Location3 North Nd 54
RouteCounty Highway 0
CountyWalsh County
StateNorth Dakota
Coordinates48.23708, -97.18927
Functional classRural Local

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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionApril 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry7: Better than present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating67.4 US tons
Inventory rating40.3 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length235 ft (71.6 m)
Longest span114 ft (34.7 m)
Deck width35 ft (10.6 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic70 (2019)
Projected traffic70 by 2039
Trucks12%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesOverpass structure at an interchange
CrossesHighway
Detour if closed6.2 mi (10 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/LAKE Ardoch Int built?

It was built in 1971, making it 54 years old in 2025. It was reconstructed in 1998.

What condition is County Highway over I-29/LAKE Ardoch 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 April 2023.

How much traffic does County Highway over I-29/LAKE Ardoch Int carry?

About 70 vehicles per day (2019 count), of which roughly 12% are trucks.

How long is County Highway over I-29/LAKE Ardoch Int?

The structure is 235 ft (71.6 m) long with a longest span of 114 ft (34.7 m) and a deck 35 ft wide.

Who owns County Highway over I-29/LAKE Ardoch Int?

It is owned by the State Highway Agency.