US Bridges

County Highway over Stack Slough

Fair

Richland County, North Dakota · 5 North of Nd 11 · Structure no. 0029013068 N

Built
1976
49 years old
Condition
Fair
inspected September 2024
Type
Culvert
Concrete
Length
28 ft
3 main spans
Daily traffic
100
2019 count
Owner
State
State Highway Agency

About this bridge

County Highway over Stack Slough is a concrete culvert carrying County Highway over Stack Slough in Richland County, North Dakota. It was built in 1976, so it is 49 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 100 vehicles a day, roughly 10% of them trucks, projected to reach 120 by 2039. The structure is 28 ft (8.6 m) long. If it were closed, the detour would be 1.9 mi (3 km).

Location

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CarriesCounty Highway
CrossesStack Slough
Location5 North of Nd 11
RouteCounty Highway 0
CountyRichland County
StateNorth Dakota
Coordinates46.12391, -96.83862
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
Channel and channel protection7 GoodSome minor problems.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionSeptember 2024
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating79 US tons
Inventory rating47.3 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans3
Design loadHS 20
Structure length28 ft (8.6 m)
Longest span9 ft (2.7 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic100 (2019)
Projected traffic120 by 2039
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 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—
NavigationNo navigation control on waterway

Frequently asked questions

When was County Highway over Stack Slough built?

It was built in 1976, making it 49 years old in 2025.

What condition is County Highway over Stack Slough 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 September 2024.

How much traffic does County Highway over Stack Slough carry?

About 100 vehicles per day (2019 count), of which roughly 10% are trucks.

How long is County Highway over Stack Slough?

The structure is 28 ft (8.6 m) long with a longest span of 9 ft (2.7 m).

Who owns County Highway over Stack Slough?

It is owned by the State Highway Agency.