US Bridges

Nd Highway 89 over Tongue River

Good

Pembina County, North Dakota · 2 South of JCT Nd 5 · Structure no. 0089010150

Built
1970
55 years old
Condition
Good
inspected June 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
165 ft
3 main spans
Daily traffic
170
2019 count
Owner
State
State Highway Agency

About this bridge

Nd Highway 89 over Tongue River is a steel continuous stringer/multi-beam or girder carrying Nd Highway 89 over Tongue River in Pembina County, North Dakota. It was built in 1970, so it is 55 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 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 170 vehicles a day, roughly 12% of them trucks, projected to reach 170 by 2039. The structure is 165 ft (50.3 m) long and 41 ft wide. If it were closed, the detour would be 123.7 mi (199 km).

CarriesNd Highway 89
CrossesTongue River
Location2 South of JCT Nd 5
RouteState Highway 89
Coordinates48.73514, -97.90531
Functional classRural Local

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 protection3 SeriousLoss of section, deterioration, spalling or scour have seriously affected primary structural components.
Last inspectionJune 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
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 rating68.6 US tons
Inventory rating41 US tons

Structure

MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length165 ft (50.3 m)
Longest span61 ft (18.6 m)
Deck width41 ft (12.5 m)
Roadway width36 ft (11 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic170 (2019)
Projected traffic170 by 2039
Trucks12%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed123.7 mi (199 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 89 over Tongue River built?

It was built in 1970, making it 55 years old in 2025.

What condition is Nd Highway 89 over Tongue 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 89 over Tongue River carry?

About 170 vehicles per day (2019 count), of which roughly 12% are trucks.

How long is Nd Highway 89 over Tongue River?

The structure is 165 ft (50.3 m) long with a longest span of 61 ft (18.6 m) and a deck 41 ft wide.

Who owns Nd Highway 89 over Tongue River?

It is owned by the State Highway Agency.