US Bridges

County Highway over I-29/KELSO Separation

Good

Traill County, North Dakota · 3 South of Nd 200 · Structure no. 0029097333

Built
1970
55 years old
Condition
Good
inspected April 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
300 ft
4 main spans
Daily traffic
90
2019 count
Owner
State
State Highway Agency

About this bridge

County Highway over I-29/KELSO Separation is a steel continuous stringer/multi-beam or girder carrying County Highway over I-29/KELSO Separation in Traill 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 90 vehicles a day, projected to reach 90 by 2039. The structure is 300 ft (91.4 m) long and 35 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

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CarriesCounty Highway
CrossesI-29/KELSO Separation
Location3 South of Nd 200
RouteCounty Highway 0
CountyTraill County
StateNorth Dakota
Coordinates47.3113, -97.03416
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 geometry7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating60.8 US tons
Inventory rating36.5 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadH 20
Structure length300 ft (91.4 m)
Longest span110 ft (33.5 m)
Deck width35 ft (10.6 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic90 (2019)
Projected traffic90 by 2039
Trucks—
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed3.7 mi (6 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/KELSO Separation built?

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

What condition is County Highway over I-29/KELSO 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/KELSO Separation carry?

About 90 vehicles per day (2019 count).

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

The structure is 300 ft (91.4 m) long with a longest span of 110 ft (33.5 m) and a deck 35 ft wide.

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

It is owned by the State Highway Agency.