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~~~~ will not be quite the same because of inflow between the two sites. East Rifle Creek near Rifle and Grass Valley Canal near Rifle were discontinued since investigation work was completed and the project authorized. Rifle Creek near Rifle and Plateau Creek near Heiberger were also dropped because of progress on con- struction of the two projects involved. Roar- ing Fork at Aspen was discontinued when the station was moved upstream above Salvation Ditch. Kiowa Creek at Bennett, which station has been operated in cooperation with Colorado State university, was discontinued since they no longer had funds to continue the work at that station. And Big Beaver near Buford which I mentioned earlier. Region 7 of the Bureau of Reclamation is financing an expansion of the Quality of Surface Waters Program in Colorado. Data on chemical quality are being determined on a monthly basis on California Gulch near the mouth and at the gaging stations on the Arkan- sas River near Malta, near Portland, and near Pueblo. Sediment data are being collected on a semi-monthly basis on the Arkansas River near Portland and near Pueblo. The Data Release No.1, 'Quality of Sur- face Waters in Colorado, 1963 water year' has become available. It contains data on chemical quality, sediment loads and temperature for the sites in the state where information on quality of surface water was collected. We have sent a few copies of those reports out to some of the people whom we thought would be inter- ~sted. We brought a few more copies down today so they would be available to members of the Board if they would care to have them. Most of the effort of the Ground Water Branch has been spent, since the last report, in the field. Field work in the Piceance Basin has consisted of well and spring inven- tory, measuring geologic sections, mapping aerial geology, measuring spring discharge, and pump-testing some of the wells in the area. I I