Colbert E. Cushing was a Senior Research Scientist with the Battelle-Pacific Northwest Laboratory in Richland, Washington, until semi-retiring in 1996. He was an Adjunct Professor at Washington State University-Tri Cities, and held an Affiliate Faculty appointment at Colorado State University. He was one of the scientists instrumental in the formulation and testing of the River Continuum Concept. He has published widely in scientific journals and books, was the lead editor of River and Stream Ecosystems, and co-authored Streams: Their Ecology and Life. He served on the editorial boards for the journals Ecology and Journal of the North American Benthological Society (NABS) and was past president of NABS. He was co-editor for the first edition of Rivers of North America and Field Guide to Rivers of North America (2010) and passed away before the completion of the second edition.