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Show The Commission's Engineering Committee had one joint meeting with engineers of the Department of the Interior for the purpose of a general discussion of Glen Canyon Reservoir studies that had been made. By letter of September 26, 1958 our Engineering Committee has been invited to meet with the Lower Basin Engineering Group and the engineers of the Department of the Interior for a review of a series of objective studies made by the Lower Basin and Department Engineers relating to the filling of Glen Canyon Reservoir and the coordination of operations respecting storage and release from Glen Canyon Reservoir and Lake Mead and for a discussion of such additional studies as may be appropriate. With the approval of the Commission, our Engineering Committee has accepted this invitation with the understanding that committee members cannot commit the agency or political subdivision that they represent, and that discussions of studies shall be confined to developing facts and determining the effects on filling Upper Basin Reservoirs of various hydrologic assumptions, and that all studies shall be exploratory and not for publication. At the time of writing this report, the initial joint meeting of the three groups of engineers has not been scheduled. It is expected to be held early in 1959. Stream-Gaging Stations The Commission is continuing its study of the stream-gaging program in the Upper Colorado River Basin with respect to future operation of the Storage Units and participating projects of the Colorado River Storage Project now under construction, as well as relative to an adequate hydrologic network and to future research into the Inflow-Outflow Method of measuring stream depletions in the Upper Basin and in each state thereof. Several stream-gaging conferences have been held with officials of the U. S. Geological Survey and Bureau of Reclamation. Due to budgetary limitations, the U. S. Geological Survey found it necessary to abandon the gaging station on the Colorado River at Hite, Utah at the end of the 1958 water year, and to request financial support, which was granted, from the State of Arizona in order to continue operation of the station on the Colorado River near Grand Canyon, Arizona. Studies made by the Geological Survey, the Bureau of Reclamation and our office show that, as far as quantitative measurements of stream flow of the Colorado River at Hite, Utah are concerned, substantially the same results can be obtained by using a combination of records of other stations in the vicinity. The gaging station on the Colorado River near Grand Canyon, Arizona is regarded by representatives of all seven Colorado River Basin States as being a key station of national signif- 21 |