January 12, 2006. The Chehalis Flood of Centralia, Washington. Photographer states :: .This picture from the Centralia, WA, Chronicle. With 3 major rivers - Chehalis, Newaukum, and Skookumchuck - combining in the valley, the low-lying areas of Chehalis (foreground) and Centralia (background) are flooded after 25 consecutive days of rain.