US Bridges

Nd Highway 18 over County Drainage Ditch

Fair

Traill County, North Dakota · 5 South Mayville · Structure no. 0018116770

Built
1932
93 years old, rebuilt 1959
Condition
Fair
inspected October 2024
Type
Culvert
Concrete
Length
22 ft
3 main spans
Daily traffic
510
2019 count
Owner
State
State Highway Agency

About this bridge

Nd Highway 18 over County Drainage Ditch is a concrete culvert carrying Nd Highway 18 over County Drainage Ditch in Traill County, North Dakota. It was built in 1932 and reconstructed in 1959, so it is 93 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 510 vehicles a day, roughly 10% of them trucks, projected to reach 509 by 2039. The structure is 22 ft (6.8 m) long. If it were closed, the detour would be 19.3 mi (31 km).

Location

Open in Google Maps
CarriesNd Highway 18
CrossesCounty Drainage Ditch
Location5 South Mayville
RouteState Highway 18
CountyTraill County
StateNorth Dakota
Coordinates47.42558, -97.32593
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 protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionOctober 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating31.1 US tons
Inventory rating18.5 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans3
Design loadHS 20
Structure length22 ft (6.8 m)
Longest span7 ft (2.1 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic510 (2019)
Projected traffic509 by 2039
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed19.3 mi (31 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 18 over County Drainage Ditch built?

It was built in 1932, making it 93 years old in 2025. It was reconstructed in 1959.

What condition is Nd Highway 18 over County Drainage Ditch 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 October 2024.

How much traffic does Nd Highway 18 over County Drainage Ditch carry?

About 510 vehicles per day (2019 count), of which roughly 10% are trucks.

How long is Nd Highway 18 over County Drainage Ditch?

The structure is 22 ft (6.8 m) long with a longest span of 7 ft (2.1 m).

Who owns Nd Highway 18 over County Drainage Ditch?

It is owned by the State Highway Agency.