US Bridges

County Highway over I-29/GRAFTON Separation

Good

Walsh County, North Dakota · 2 South of Nd 17 · Structure no. 0029173790

Built
1971
54 years old
Condition
Good
inspected April 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
265 ft
4 main spans
Daily traffic
20
2019 count
Owner
State
State Highway Agency

About this bridge

County Highway over I-29/GRAFTON Separation is a steel continuous stringer/multi-beam or girder carrying County Highway over I-29/GRAFTON Separation in Walsh County, North Dakota. It was built in 1971, 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 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 20 vehicles a day, projected to reach 20 by 2039. The structure is 265 ft (80.8 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/GRAFTON Separation
Location2 South of Nd 17
RouteCounty Highway 0
CountyWalsh County
StateNorth Dakota
Coordinates48.38312, -97.19025
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 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 loadHS 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 traffic20 (2019)
Projected traffic20 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/GRAFTON Separation built?

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

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

About 20 vehicles per day (2019 count).

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

It is owned by the State Highway Agency.