But the dam breached, and set a flood of almost inconceivable size ... killing wildlife and human inhabitants in its path. And Lake Missoula wasn't the only ice damned lake. One in Northern ...

After enough water had been released, the ice dam resettled and the lake refilled ... forming glacial Lake Columbia. When Lake Missoula’s outburst floods poured into Lake Columbia, the water spilled ...

Some of the largest floods in earth history drained through the Columbia ... forming glacial lakes Columbia and Missoula. Glacial Lake Missoula was metastable and its ice dam released episodic ...

It's a testament to Mother Nature's strength and power, so vast and spectacular that it's often considered the "Grand Canyon of Washington."The Grand Coulee in Washington is an ancient river bed gorge ...

But the dam breached and sent a flood of almost inconceivable size ... killing wildlife and human inhabitants in its path. And Lake Missoula wasn't the only ice-dammed lake. One in northern ...

Once home to an ancient ice dam holding back Glacial Lake Missoula, a scenic stretch of ... the area's ice age history and the cataclysmic floods that reshaped the Pacific Northwest.

MISSOULA, Mont. — The Missoula County Office ... Clear gutters and downspouts to allow proper drainage and reduce the risk of ice dams and leaks. Remove snow from roofs if it is safe to do ...

and the ice dam broke again. Rinse and repeat dozens of times over 2,000 years. These floods are now known by many names: the Missoula floods, the Bretz floods or Spokane floods. They scoured out ...

Poor drainage could also create urban flooding. People are advised to clear gutters and downspouts to reduce the risk of ice dams and leaks around homes, and to remove snow from roofs and away ...