A print version of the map of the Missoula Floods sells for $30 from. Nature of the Northwest Information Center, 800 N.E. Oregon St., Suite 965, Portland.-- Ian Campbell.

Missoula floods. that reshaped much of Oregon and Washington between 18,000 and 15,000 years ago. Now scientists have found a way to travel back in time to watch the megafloods unfold, ...

The glacial floods set Missoula up to have a really good aquifer, Gardner said, but a shallow one. At most, it’s 200 feet underneath the surface, which means people are living right on top of it.

Everything you see was carved almost instantly by the violent flood waters from Lake Missoula. During the floods, this was the largest waterfall in the world, five times the width of Niagara Falls.

When Lake Missoula’s outburst floods poured into Lake Columbia, the water spilled over to the south onto the eastern Washington plateau, eroding the landscape and creating the Channeled Scablands.