US Bridges

Nd Highway 18 over Creek

Fair

Cass County, North Dakota · 1 North of Amenia · Structure no. 0018083781

Built
1957
68 years old
Condition
Fair
inspected July 2023
Type
Culvert
Concrete
Length
26 ft
3 main spans
Daily traffic
990
2019 count
Owner
State
State Highway Agency

About this bridge

Nd Highway 18 over Creek is a concrete culvert carrying Nd Highway 18 over Creek in Cass County, North Dakota. It was built in 1957, so it is 68 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 990 vehicles a day, roughly 12% of them trucks, projected to reach 550 by 2039. The structure is 26 ft (7.9 m) long. If it were closed, the detour would be 16.2 mi (26 km).

Location

Open in Google Maps
CarriesNd Highway 18
CrossesCreek
Location1 North of Amenia
RouteState Highway 18
CountyCass County
StateNorth Dakota
Coordinates47.01803, -97.21379
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 protection4 PoorAdvanced section loss, deterioration, spalling or scour.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJuly 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Waterway adequacy3: Basically intolerable, requiring high priority of corrective action
Approach roadway alignment8: Equal to present desirable criteria
Operating rating110.1 US tons
Inventory rating61.5 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans3
Design loadHS 20
Structure length26 ft (7.9 m)
Longest span8 ft (2.4 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic990 (2019)
Projected traffic550 by 2039
Trucks12%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed16.2 mi (26 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Nd Highway 18 over Creek built?

It was built in 1957, making it 68 years old in 2025.

What condition is Nd Highway 18 over Creek 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 2023.

How much traffic does Nd Highway 18 over Creek carry?

About 990 vehicles per day (2019 count), of which roughly 12% are trucks.

How long is Nd Highway 18 over Creek?

The structure is 26 ft (7.9 m) long with a longest span of 8 ft (2.4 m).

Who owns Nd Highway 18 over Creek?

It is owned by the State Highway Agency.