US Bridges

County Road 10 over Mckenzie Slough

Fair

Burleigh County, North Dakota · 1 West of Mckenzie · Structure no. 000000008126351

Built
1931
94 years old, rebuilt 1946
Condition
Fair
inspected November 2024
Type
Culvert
Concrete
Length
32 ft
3 main spans
Daily traffic
745
2018 count
Owner
County
County Highway Agency

About this bridge

County Road 10 over Mckenzie Slough is a concrete culvert carrying County Road 10 over Mckenzie Slough in Burleigh County, North Dakota. It was built in 1931 and reconstructed in 1946, so it is 94 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 745 vehicles a day, roughly 10% of them trucks, projected to reach 800 by 2038. The structure is 32 ft (9.8 m) long. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesCounty Road 10
CrossesMckenzie Slough
Location1 West of Mckenzie
RouteCounty Highway 836
CountyBurleigh County
StateNorth Dakota
Coordinates46.82311, -100.43677
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
Channel and channel protection7 GoodSome minor problems.
Culvert5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionNovember 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
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating36 US tons
Inventory rating21.1 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans3
Design loadHS 20
Structure length32 ft (9.8 m)
Longest span10 ft (3 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic745 (2018)
Projected traffic800 by 2038
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

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 Road 10 over Mckenzie Slough built?

It was built in 1931, making it 94 years old in 2025. It was reconstructed in 1946.

What condition is County Road 10 over Mckenzie 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 November 2024.

How much traffic does County Road 10 over Mckenzie Slough carry?

About 745 vehicles per day (2018 count), of which roughly 10% are trucks.

How long is County Road 10 over Mckenzie Slough?

The structure is 32 ft (9.8 m) long with a longest span of 10 ft (3 m).

Who owns County Road 10 over Mckenzie Slough?

It is owned by the County Highway Agency.