US Bridges

Nd Highway 46 over County Drain

Fair

Cass County, North Dakota · 3 West of I-29 · Structure no. 0046117315

Built
1934
91 years old, rebuilt 1953
Condition
Fair
inspected May 2023
Type
Culvert
Concrete
Length
21 ft
2 main spans
Daily traffic
1,510
2019 count
Owner
State
State Highway Agency

About this bridge

Nd Highway 46 over County Drain is a concrete culvert carrying Nd Highway 46 over County Drain in Cass County, North Dakota. It was built in 1934 and reconstructed in 1953, so it is 91 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 1,510 vehicles a day, roughly 15% of them trucks, projected to reach 1,225 by 2039. The structure is 21 ft (6.4 m) long. If it were closed, the detour would be 16.8 mi (27 km).

Location

Open in Google Maps
CarriesNd Highway 46
CrossesCounty Drain
Location3 West of I-29
RouteState Highway 46
CountyCass County
StateNorth Dakota
Coordinates46.63026, -96.8948
Functional classRural Minor Arterial

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 protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMay 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating34.2 US tons
Inventory rating26.2 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans2
Design loadH 15
Structure length21 ft (6.4 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 traffic1,510 (2019)
Projected traffic1,225 by 2039
Trucks15%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed16.8 mi (27 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 Nd Highway 46 over County Drain built?

It was built in 1934, making it 91 years old in 2025. It was reconstructed in 1953.

What condition is Nd Highway 46 over County Drain 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 May 2023.

How much traffic does Nd Highway 46 over County Drain carry?

About 1,510 vehicles per day (2019 count), of which roughly 15% are trucks.

How long is Nd Highway 46 over County Drain?

The structure is 21 ft (6.4 m) long with a longest span of 10 ft (3 m).

Who owns Nd Highway 46 over County Drain?

It is owned by the State Highway Agency.