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-1- ABSTRACT The Flaming Gorge Reservoir is scheduled for completion. is 1962. im- pounded waters will back up the Green River to within four miles of the town of Green River, Wyoming. An est~,mated X00,000 people will utilize the reser- voir annually for recreational purposes. Gill net sets, electrofishing, and toxicant applications indicate that the game fish populations, within the confines of the reservoir, are neg- ligible. Trash fish populations are very high with suckers, bonytails, squaw- fish, and carp representing the majority of fishes present. The removal of trash fish populations is feasible under certain conditions. Reservoir contours and physical data indicate that two types of habitat will exist. The wain body of the reservoir az?d canyon area will contain habitat suitable far salmonid species, and the numerous ar*_ns and bay areas will furnish habitat for warm water species. Initial game fish populations will be stacked with trxe thought a4 msx- imum reproductive potential in :Hind. Potential spawning grounds exist for salmonid species in the Green River proper above the reservoir and in the tributaries of Henry°s Fork and Carter Creek. Experimental eyed and green kokanee egg plants in the Green River proper and Henry°s Fork indicate that prolonged low water temperatures existing during the incubation period of this species will virtually eliminate any natural reproduction from late running fish. Chemical, physical and biological studies indicate that the lower section of the Green River above the town of Green River is capable of producing a better game fishery than it is at the present time. The advent of the Seedskadee project, approximately sixty river miles upstream from the backwaters of the Flaming Gorge Reservoir, will change the chemical and physical characteristics of the Green Ri~rer between the two projects. Of these changes the alteration of stream flaws, increased water temperatures, and increased *_urbidities may have a detrimental effect upon the natural spawning potential of the Green River proper.