US Bridges

County Highway over I-29/OAKWOOD Separation

Good

Walsh County, North Dakota · 2 North of Nd 17 · Structure no. 0029177794

Built
1974
51 years old
Condition
Good
inspected April 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
265 ft
4 main spans
Daily traffic
50
2019 count
Owner
State
State Highway Agency

About this bridge

County Highway over I-29/OAKWOOD Separation is a steel continuous stringer/multi-beam or girder carrying County Highway over I-29/OAKWOOD Separation in Walsh County, North Dakota. It was built in 1974, so it is 51 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 50 vehicles a day, projected to reach 50 by 2039. The structure is 265 ft (80.8 m) long and 35 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

Location

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CarriesCounty Highway
CrossesI-29/OAKWOOD Separation
Location2 North of Nd 17
RouteCounty Highway 0
CountyWalsh County
StateNorth Dakota
Coordinates48.44105, -97.19069
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.
Superstructure8 Very GoodNo problems noted.
Substructure7 GoodSome minor problems.
Last inspectionApril 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry7: Better than present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating48.3 US tons
Inventory rating28.9 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadH 15
Structure length265 ft (80.8 m)
Longest span93 ft (28.3 m)
Deck width35 ft (10.6 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic50 (2019)
Projected traffic50 by 2039
Trucks—
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/OAKWOOD Separation built?

It was built in 1974, making it 51 years old in 2025.

What condition is County Highway over I-29/OAKWOOD 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 2023.

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

About 50 vehicles per day (2019 count).

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

The structure is 265 ft (80.8 m) long with a longest span of 93 ft (28.3 m) and a deck 35 ft wide.

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

It is owned by the State Highway Agency.