US Bridges

Nd Highway 18 over Pembina River

Good

Pembina County, North Dakota · 1 South Canada Border · Structure no. 0018241409

Built
1988
37 years old
Condition
Good
inspected June 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
180 ft
3 main spans
Daily traffic
410
2019 count
Owner
State
State Highway Agency

About this bridge

Nd Highway 18 over Pembina River is a steel continuous stringer/multi-beam or girder carrying Nd Highway 18 over Pembina River in Pembina County, North Dakota. It was built in 1988, so it is 37 years old, younger than the North Dakota average of 48.2 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 410 vehicles a day, roughly 20% of them trucks, projected to reach 410 by 2039. The structure is 180 ft (54.9 m) long and 43 ft wide. If it were closed, the detour would be 28 mi (45 km).

CarriesNd Highway 18
CrossesPembina River
Location1 South Canada Border
RouteState Highway 18
Coordinates48.98986, -97.55722
Functional classRural Minor Arterial

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection4 PoorAdvanced section loss, deterioration, spalling or scour.
Last inspectionJune 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry8: Equal to present desirable criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating82.6 US tons
Inventory rating49.5 US tons

Structure

MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length180 ft (54.9 m)
Longest span65 ft (19.8 m)
Deck width43 ft (13 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic410 (2019)
Projected traffic410 by 2039
Trucks20%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed28 mi (45 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 Pembina River built?

It was built in 1988, making it 37 years old in 2025.

What condition is Nd Highway 18 over Pembina River in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in June 2024.

How much traffic does Nd Highway 18 over Pembina River carry?

About 410 vehicles per day (2019 count), of which roughly 20% are trucks.

How long is Nd Highway 18 over Pembina River?

The structure is 180 ft (54.9 m) long with a longest span of 65 ft (19.8 m) and a deck 43 ft wide.

Who owns Nd Highway 18 over Pembina River?

It is owned by the State Highway Agency.