US Bridges

County Highway over I-29/ST Benedict Int

Good

Cass County, North Dakota · 6 North of Nd 46 · Structure no. 0029054167

Built
1972
53 years old, rebuilt 2007
Condition
Good
inspected April 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
235 ft
2 main spans
Daily traffic
640
2019 count
Owner
State
State Highway Agency

About this bridge

County Highway over I-29/ST Benedict Int is a steel continuous stringer/multi-beam or girder carrying County Highway over I-29/ST Benedict Int in Cass County, North Dakota. It was built in 1972 and reconstructed in 2007, so it is 53 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 640 vehicles a day, roughly 11% of them trucks, projected to reach 700 by 2039. The structure is 235 ft (71.6 m) long and 41 ft wide.

Location

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CarriesCounty Highway
CrossesI-29/ST Benedict Int
Location6 North of Nd 46
RouteCounty Highway 950
CountyCass County
StateNorth Dakota
Coordinates46.71686, -96.83037
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 geometry7: Better than present minimum criteria
Approach roadway alignment5: Somewhat better than minimum adequacy to tolerate being left in place as is
Operating rating62.1 US tons
Inventory rating37.1 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length235 ft (71.6 m)
Longest span118 ft (36 m)
Deck width41 ft (12.4 m)
Roadway width36 ft (11 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic640 (2019)
Projected traffic700 by 2039
Trucks11%
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/ST Benedict Int built?

It was built in 1972, making it 53 years old in 2025. It was reconstructed in 2007.

What condition is County Highway over I-29/ST Benedict Int 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/ST Benedict Int carry?

About 640 vehicles per day (2019 count), of which roughly 11% are trucks.

How long is County Highway over I-29/ST Benedict Int?

The structure is 235 ft (71.6 m) long with a longest span of 118 ft (36 m) and a deck 41 ft wide.

Who owns County Highway over I-29/ST Benedict Int?

It is owned by the State Highway Agency.