US Bridges

Interstate 29 over Rose Coulee

Fair

Cass County, North Dakota · 2 South of I-94 · Structure no. 0029061394 R

Built
1973
52 years old, rebuilt 1983
Condition
Fair
inspected May 2023
Type
Box Beam or Girders - Single or Spread
Prestressed Concrete Continuous
Length
100 ft
3 main spans
Daily traffic
6,950
2019 count
Owner
State
State Highway Agency

About this bridge

Interstate 29 over Rose Coulee is a prestressed concrete continuous box beam or girders - single or spread carrying Interstate 29 over Rose Coulee in Cass County, North Dakota. It was built in 1973 and reconstructed in 1983, so it is 52 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 6,950 vehicles a day, roughly 13% of them trucks, projected to reach 6,950 by 2039. The structure is 100 ft (30.5 m) long and 45 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesInterstate 29
CrossesRose Coulee
Location2 South of I-94
RouteInterstate 29
CountyCass County
StateNorth Dakota
Coordinates46.82034, -96.83931
Functional classRural Principal Arterial - Interstate

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.
Superstructure8 Very GoodNo problems noted.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionMay 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating82.9 US tons
Inventory rating49.6 US tons

Structure

Structure typeBox Beam or Girders - Single or Spread
MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length100 ft (30.5 m)
Longest span31 ft (9.4 m)
Deck width45 ft (13.7 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic6,950 (2019)
Projected traffic6,950 by 2039
Trucks13%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkInterstate STRAHNET route

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 Interstate 29 over Rose Coulee built?

It was built in 1973, making it 52 years old in 2025. It was reconstructed in 1983.

What condition is Interstate 29 over Rose Coulee 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 May 2023.

How much traffic does Interstate 29 over Rose Coulee carry?

About 6,950 vehicles per day (2019 count), of which roughly 13% are trucks.

How long is Interstate 29 over Rose Coulee?

The structure is 100 ft (30.5 m) long with a longest span of 31 ft (9.4 m) and a deck 45 ft wide.

Who owns Interstate 29 over Rose Coulee?

It is owned by the State Highway Agency.