US Bridges

County Highway over I-29/WALCOTT Interchange

Good

Richland County, North Dakota · 6 South of Nd 46 · Structure no. 0029042117

Built
1974
51 years old, rebuilt 2003
Condition
Good
inspected April 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
245 ft
2 main spans
Daily traffic
275
2019 count
Owner
State
State Highway Agency

About this bridge

County Highway over I-29/WALCOTT Interchange is a steel continuous stringer/multi-beam or girder carrying County Highway over I-29/WALCOTT Interchange in Richland County, North Dakota. It was built in 1974 and reconstructed in 2003, 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 275 vehicles a day, roughly 12% of them trucks, projected to reach 275 by 2039. The structure is 245 ft (74.7 m) long and 32 ft wide.

Location

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CarriesCounty Highway
CrossesI-29/WALCOTT Interchange
Location6 South of Nd 46
RouteCounty Highway 3906
CountyRichland County
StateNorth Dakota
Coordinates46.54367, -96.82443
Functional classRural Major Collector

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 evaluation7: Better than present minimum criteria
Deck geometry6: Equal to present minimum criteria
Approach roadway alignment5: Somewhat better than minimum adequacy to tolerate being left in place as is
Operating rating64.2 US tons
Inventory rating38.4 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadH 20
Structure length245 ft (74.7 m)
Longest span122 ft (37.2 m)
Deck width32 ft (9.9 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic275 (2019)
Projected traffic275 by 2039
Trucks12%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesOverpass structure at an interchange
CrossesHighway
Detour if closed—
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/WALCOTT Interchange built?

It was built in 1974, making it 51 years old in 2025. It was reconstructed in 2003.

What condition is County Highway over I-29/WALCOTT Interchange 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/WALCOTT Interchange carry?

About 275 vehicles per day (2019 count), of which roughly 12% are trucks.

How long is County Highway over I-29/WALCOTT Interchange?

The structure is 245 ft (74.7 m) long with a longest span of 122 ft (37.2 m) and a deck 32 ft wide.

Who owns County Highway over I-29/WALCOTT Interchange?

It is owned by the State Highway Agency.