Projected Sewage Effluent in Las Vegas Valley, 1972-2000 Aug 27, 2025 Projected Sewage Effluent in Las Vegas Valley, 1972-2000 Cochran, G. F., Peckham, A. (1971). Projected Sewage Effluent in Las Vegas Valley, 1972-2000, 110, DRI Report No. 41017