US Bridges

Cass County 20 over I-29/NORTH Fargo Int

Fair

Cass County, North Dakota · 3 South of Harwood · Structure no. 0029069374

Built
1966
59 years old, rebuilt 1983
Condition
Fair
inspected July 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
295 ft
4 main spans
Daily traffic
2,000
2019 count
Owner
State
State Highway Agency

About this bridge

Cass County 20 over I-29/NORTH Fargo Int is a steel continuous stringer/multi-beam or girder carrying Cass County 20 over I-29/NORTH Fargo Int in Cass County, North Dakota. It was built in 1966 and reconstructed in 1983, so it is 59 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 fair condition with a lowest component rating of 5 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

It carries about 2,000 vehicles a day, roughly 16% of them trucks, projected to reach 2,100 by 2039. The structure is 295 ft (89.9 m) long and 36 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesCass County 20
CrossesI-29/NORTH Fargo Int
Location3 South of Harwood
RouteCounty Highway 928
CountyCass County
StateNorth Dakota
Coordinates46.93413, -96.85065
Functional classRural Major Collector

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJuly 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment5: Somewhat better than minimum adequacy to tolerate being left in place as is
Operating rating59.6 US tons
Inventory rating35.6 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length295 ft (89.9 m)
Longest span84 ft (25.6 m)
Deck width36 ft (10.9 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,000 (2019)
Projected traffic2,100 by 2039
Trucks16%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesOverpass structure at an interchange
CrossesHighway
Detour if closed1.9 mi (3 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 Cass County 20 over I-29/NORTH Fargo Int built?

It was built in 1966, making it 59 years old in 2025. It was reconstructed in 1983.

What condition is Cass County 20 over I-29/NORTH Fargo Int in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in July 2023.

How much traffic does Cass County 20 over I-29/NORTH Fargo Int carry?

About 2,000 vehicles per day (2019 count), of which roughly 16% are trucks.

How long is Cass County 20 over I-29/NORTH Fargo Int?

The structure is 295 ft (89.9 m) long with a longest span of 84 ft (25.6 m) and a deck 36 ft wide.

Who owns Cass County 20 over I-29/NORTH Fargo Int?

It is owned by the State Highway Agency.