US Bridges

US Highway 81 over I-29/52nd Ave.Sth Int.

Good

Cass County, North Dakota · 3 South of I-94 · Structure no. 0029060352

Built
2008
17 years old
Condition
Good
inspected April 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete Continuous
Length
304 ft
2 main spans
Daily traffic
6,600
2019 count
Owner
State
State Highway Agency

About this bridge

US Highway 81 over I-29/52nd Ave.Sth Int. is a prestressed concrete continuous stringer/multi-beam or girder carrying US Highway 81 over I-29/52nd Ave.Sth Int. in Cass County, North Dakota. It was built in 2008, so it is 17 years old, younger 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 6,600 vehicles a day, roughly 3% of them trucks, projected to reach 36,960 by 2039. The structure is 304 ft (92.7 m) long and 59 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesUS Highway 81
CrossesI-29/52nd Ave.Sth Int.
Location3 South of I-94
RouteU.S. Route 81
CountyCass County
StateNorth Dakota
Coordinates46.8041, -96.83878
Functional classRural Minor Arterial

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.
Substructure8 Very GoodNo problems noted.
Last inspectionApril 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating99 US tons
Inventory rating59.5 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length304 ft (92.7 m)
Longest span152 ft (46.3 m)
Deck width59 ft (17.9 m)
Roadway width56 ft (17.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic6,600 (2019)
Projected traffic36,960 by 2039
Trucks3%
Lanes on structure4
Traffic directionOne-way traffic
CarriesOverpass structure at an interchange
CrossesHighway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemYes

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—
NavigationNo navigation control on waterway

Frequently asked questions

When was US Highway 81 over I-29/52nd Ave.Sth Int. built?

It was built in 2008, making it 17 years old in 2025.

What condition is US Highway 81 over I-29/52nd Ave.Sth 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 US Highway 81 over I-29/52nd Ave.Sth Int. carry?

About 6,600 vehicles per day (2019 count), of which roughly 3% are trucks.

How long is US Highway 81 over I-29/52nd Ave.Sth Int.?

The structure is 304 ft (92.7 m) long with a longest span of 152 ft (46.3 m) and a deck 59 ft wide.

Who owns US Highway 81 over I-29/52nd Ave.Sth Int.?

It is owned by the State Highway Agency.