Ice Age Floods using the Grand Coulee and the Upper Crab Creek drainages, filled the Quincy Basin at a rate up to 16.5 million cubic meters of water per second. This tour, led by Ken Lacy, will examine the incredible erosive consequences of the floodwaters escaping the Quincy Basin, via Lynch, Potholes and Frenchman Springs Coulees. The tour will also examine the eight mile wide Drumheller Channels, through which most of the Quincy Basin floodwaters drained largely down the Lower Crab Creek drainage, toward the Columbia River at Beverly, Washington.
Tour goers will meet at the Wenatchee Valley Museum to board a tour bus that will depart at 9 a.m. Please plan to bring your lunch unless otherwise notified.