Caption on image: Photographed by IRSI [International Remote Sensing Institute]. Fraga and Cartwright. The photograph was taken July 6, 1965, as part of a project by a group of California scientists and engineers under the direction of Gilbert W. Fraga and Vern Cartwright to use aerial photography and photographic analysis to discover evidence of the sources of pollution of Lake Tahoe. This image is part of the Lake Tahoe Area Council photograph collection. The Council was a private, non-political and non-profit organization dedicated to the preservation and orderly development of the Lake Tahoe Basin. It sought cooperation between private land owners and governmental agencies to solve basin-wide problems of planning, land use, park and recreation development, pollution control and soil conservation. Photographic print, 9 x 9 inches