US Bridges

US 81 over I-29/MANVEL Interchange

Fair

Grand Forks County, North Dakota · Junction US 81 Manvel · Structure no. 0029152337

Built
1971
54 years old, rebuilt 1983
Condition
Fair
inspected April 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
265 ft
4 main spans
Daily traffic
2,130
2019 count
Owner
State
State Highway Agency

About this bridge

US 81 over I-29/MANVEL Interchange is a steel continuous stringer/multi-beam or girder carrying US 81 over I-29/MANVEL Interchange in Grand Forks County, North Dakota. It was built in 1971 and reconstructed in 1983, so it is 54 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 5 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 2,130 vehicles a day, roughly 15% of them trucks, projected to reach 2,130 by 2039. The structure is 265 ft (80.8 m) long and 41 ft wide. If it were closed, the detour would be 8.1 mi (13 km).

Location

Open in Google Maps
CarriesUS 81
CrossesI-29/MANVEL Interchange
LocationJunction US 81 Manvel
RouteU.S. Route 81
CountyGrand Forks County
StateNorth Dakota
Coordinates48.07768, -97.16924
Functional classRural Principal Arterial - Other

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure7 GoodSome minor problems.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionApril 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment7: Better than present minimum criteria
Operating rating68.6 US tons
Inventory rating41.1 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length265 ft (80.8 m)
Longest span93 ft (28.3 m)
Deck width41 ft (12.4 m)
Roadway width36 ft (11 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,130 (2019)
Projected traffic2,130 by 2039
Trucks15%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesOverpass structure at an interchange
CrossesHighway
Detour if closed8.1 mi (13 km)
TollOn a free road
National Highway SystemYes

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—
NavigationNot applicable (no waterway)

Frequently asked questions

When was US 81 over I-29/MANVEL Interchange built?

It was built in 1971, making it 54 years old in 2025. It was reconstructed in 1983.

What condition is US 81 over I-29/MANVEL Interchange 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 April 2023.

How much traffic does US 81 over I-29/MANVEL Interchange carry?

About 2,130 vehicles per day (2019 count), of which roughly 15% are trucks.

How long is US 81 over I-29/MANVEL Interchange?

The structure is 265 ft (80.8 m) long with a longest span of 93 ft (28.3 m) and a deck 41 ft wide.

Who owns US 81 over I-29/MANVEL Interchange?

It is owned by the State Highway Agency.