7628 - Laserfiche WebLink

Home Browse Search

prior fluctuations to backwater development and determinations for future flow recommendations. may alter The second item needing further research is the relationship of upper Green River flows (Jensen gauge) to the lower Green River (below Green River, Utah) backwater habitat. A second major nursery habitat area occurs for Colorado squawfish near Mineral Bottom. Before a final recommendation of flows is suggested, caution should be taken in recommending flows to maximize backwater habitat in the upper portion of the river which would adversely affect habitat in the Hineral Bottom area. From the limited 1987 photography analysis, it has been concluded that 3,200 cfs maximized backwater habitat for the Mineral Bottom site. Therefor, since a range from 1,100 cfs 1,800 cfs is suggested for the upper sites, it is recommended that steady flows of 1,200, 1,500, and 2,000 cfs each be maintained for one week at the Jensen gauge. Upon river stabilization, photographs should be acquired for the Hineral Bottom site. This flow scenario should be conducted during the late summer when Green River tributaries (e.g. White, Duchesne, and Price Rivers) are stabilized at low flows, producing minimal' impact on flows at Mineral Bottom. This study will link the relationship of flow recommendations at the upper sites with backwater formation at the lower sites. In effect, it is believed that this research will make it possible to recommend flows from Flaming Gorge Dam that will benefit both nursery areas. Acknowledqements This study was supported by the Upper Colorado Regional Office of the U. S. Bureau of Reclamation. We commend Mr. Bob Williams on the excellent jOb he has done coordinating the many study teams involved in the Flaming Gorge Endangered Fish study. A special acknowledgement is given to Dr. Harold Tyus of the U. S. Fish and Wildlife Service for assisting with the design of the study and also for his staff's field support. The statistical guidance of Dr. Elmer Remenga is greatly appreciated. Lastly, we would like to acknowledge the field support and guidance provided by Ms. Sharon Tully" J>" ~~ ~ Copy to: D-150 D-400 D-700 D-1522 D-1524 D-1524 D-842B (Pucherelli)