Gregory PlumbDr. Gregory A. Plumb holds degrees in geography from Central Michigan University, the University of Idaho, and the University of Kansas. Plumb has served as GIS director for Johnson City, Tennessee, and was a faculty member at the University o Oklahoma, East Tennessee State University, and East Central University. He is the author of Waterfall Lover's Guide to the Pacific Northwest and Waterfalls of Tennessee and founder of Personalized Map Company. Plumb lives with his spouse in Oklahoma City. Read More Read Less