This was part of historic flooding in North Dakota with statewide costs estimated around 1.5 billion dollars. Flooding was the result of significant winter snows and significant spring rains, not only in North Dakota but in Montana as well. Rocky Mountain snowpack was four to six times normal. Flooding was along the Missouri River from the Garrison Dam to the South Dakota border. Dams were overwhelmed by the amount of water. Flooding included river, ground, and overland types. Estimated damages were in the hundreds of millions of dollars and that is not all inclusive. There was a significant loss to agriculture by not being able to plant. A tremendous flood fight was waged against the river, and that cost is not included here. Storm Data cannot reflect the scope of this event. Information is what was available at the time of this writing. Refer to newspaper articles and other federal, state, and local sources for detailed information.
Here are some facts about the flooding in North Dakota provided by North Dakota Emergency Management. The total estimated flood cost was around $1.5 billion. Individual and housing assistance was $323 million; small business $248 million; home and business reconstruction $452 million; public response, recovery, and mitigation $480 million; disaster unemployment for 866 claims was $2.3 million; and the public finance authority disaster loan program approved $56.6 million. Public infrastructure costs were $320 million. Of the state's 53 counties, 48 were impacted, along with three tribal nations.
The Missouri River was in flood in every state in the United States of America that it runs through. This was a multi-state disaster.

Flood in MCLEAN, NORTH DAKOTA
From 01-AUG-11 00:00:00 to 18-AUG-11 23:59:00 (CST-6)
Location: RIVERDALE
Flood cause: Heavy Rain / Snow Melt
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Other Federal Agency

See the event episode narrative for details.

Flood in MERCER, NORTH DAKOTA
From 01-AUG-11 00:00:00 to 18-AUG-11 23:59:00 (CST-6)
Location: PICK CITY
Flood cause: Heavy Rain / Snow Melt
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Other Federal Agency

See the event episode narrative for details.

Flood in OLIVER, NORTH DAKOTA
From 01-AUG-11 00:00:00 to 18-AUG-11 23:59:00 (CST-6)
Location: FT CLARK
Flood cause: Heavy Rain / Snow Melt
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Other Federal Agency

See the event episode narrative for details.

Flood in BURLEIGH, NORTH DAKOTA
From 01-AUG-11 00:00:00 to 18-AUG-11 23:59:00 (CST-6)
Location: WILTON
Flood cause: Heavy Rain / Snow Melt
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Other Federal Agency

See the event episode narrative for details.

Flood in MORTON, NORTH DAKOTA
From 01-AUG-11 00:00:00 to 18-AUG-11 23:59:00 (CST-6)
Location: NEW SALEM
Flood cause: Heavy Rain / Snow Melt
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Other Federal Agency

See the event episode narrative for details.

Flood in SIOUX, NORTH DAKOTA
From 01-AUG-11 00:00:00 to 18-AUG-11 23:59:00 (MST-7)
Location: SOLEN
Flood cause: Heavy Rain / Snow Melt
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Other Federal Agency

See the event episode narrative for details.