US Bridges

County Highway over I-29/WALLE Separation

Good

Grand Forks County, North Dakota · 3 North Nd 15 · Structure no. 0029133060

Built
1967
58 years old
Condition
Good
inspected April 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
265 ft
4 main spans
Daily traffic
100
2019 count
Owner
State
State Highway Agency

About this bridge

County Highway over I-29/WALLE Separation is a steel continuous stringer/multi-beam or girder carrying County Highway over I-29/WALLE Separation in Grand Forks County, North Dakota. It was built in 1967, so it is 58 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 100 vehicles a day, roughly 16% of them trucks, projected to reach 100 by 2039. The structure is 265 ft (80.8 m) long and 29 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

Location

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CarriesCounty Highway
CrossesI-29/WALLE Separation
Location3 North Nd 15
RouteCounty Highway 0
CountyGrand Forks County
StateNorth Dakota
Coordinates47.81735, -97.0778
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.
Last inspectionApril 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry6: Equal to present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating61 US tons
Inventory rating36.5 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 width29 ft (8.8 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic100 (2019)
Projected traffic100 by 2039
Trucks16%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed6.2 mi (10 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—
NavigationNot applicable (no waterway)

Frequently asked questions

When was County Highway over I-29/WALLE Separation built?

It was built in 1967, making it 58 years old in 2025.

What condition is County Highway over I-29/WALLE Separation 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 April 2024.

How much traffic does County Highway over I-29/WALLE Separation carry?

About 100 vehicles per day (2019 count), of which roughly 16% are trucks.

How long is County Highway over I-29/WALLE Separation?

The structure is 265 ft (80.8 m) long with a longest span of 93 ft (28.3 m) and a deck 29 ft wide.

Who owns County Highway over I-29/WALLE Separation?

It is owned by the State Highway Agency.