US Bridges

County Highway over Tributary to Lake Ardoch

Fair

Walsh County, North Dakota · 1 East of Ardoch · Structure no. 000000050146230

Built
1991
34 years old
Condition
Fair
inspected July 2024
Type
Box Beam or Girders - Single or Spread
Prestressed Concrete Continuous
Length
138 ft
2 main spans
Daily traffic
250
2014 count
Owner
County
County Highway Agency

About this bridge

County Highway over Tributary to Lake Ardoch is a prestressed concrete continuous box beam or girders - single or spread carrying County Highway over Tributary to Lake Ardoch in Walsh County, North Dakota. It was built in 1991, so it is 34 years old, younger 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 250 vehicles a day, roughly 12% of them trucks, projected to reach 250 by 2034. The structure is 138 ft (42.1 m) long and 31 ft wide. If it were closed, the detour would be 11.8 mi (19 km).

Location

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CarriesCounty Highway
CrossesTributary to Lake Ardoch
Location1 East of Ardoch
RouteCounty Highway 5022
CountyWalsh County
StateNorth Dakota
Coordinates48.20896, -97.32
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
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJuly 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating59.7 US tons
Inventory rating22.3 US tons

Structure

Structure typeBox Beam or Girders - Single or Spread
MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 25 or greater
Structure length138 ft (42.1 m)
Longest span66 ft (20.1 m)
Deck width31 ft (9.5 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic250 (2014)
Projected traffic250 by 2034
Trucks12%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed11.8 mi (19 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty 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 County Highway over Tributary to Lake Ardoch built?

It was built in 1991, making it 34 years old in 2025.

What condition is County Highway over Tributary to Lake Ardoch 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 July 2024.

How much traffic does County Highway over Tributary to Lake Ardoch carry?

About 250 vehicles per day (2014 count), of which roughly 12% are trucks.

How long is County Highway over Tributary to Lake Ardoch?

The structure is 138 ft (42.1 m) long with a longest span of 66 ft (20.1 m) and a deck 31 ft wide.

Who owns County Highway over Tributary to Lake Ardoch?

It is owned by the County Highway Agency.