As part of a cooperative effort to restore Idaho and Washington's polluted Spokane-Coeur d'Alene watershed, the Sierra Club has created a colorful map of the drainage. The region needs help: mining has left pollution and aquifer contamination; logging and farming have eroded soil. The group's advice includes cleaning up mine wastes, preventing further agricultural pollution, and preserving the remaining old-growth forests. Conservation groups throughout the region hope the map will draw attention to the watershed, whose heart is Lake Coeur d'Alene. For a copy of the "Go With the Flow" map, contact the Upper Columbia River Sierra Club, P.O. Box 413, Spokane, WA 99210 (509/456-3834).