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10 I I I I I I I I I I I I I I I I I I I Chapter 1 - Gather Existing Information 8b. Title: Effects of Metal-Mine Drainage on Water Quality in Selected Areas of Colorado, 1972-1973. Colorado Water Resources Circular No. 25. Colorado Water Conservation Board, Denver, CO. Prepared by: R.E. Moran and D.A. Wentz Date: 1974 Time of Study: March 5,6, 1973 and June 25,26,27, 1973 Some sites only measured on one day of the year. Sites: SR-1 A Slate River above confluence with East River SR-1 B Slate River above Baxter Gulch SR-1 C Slate River below Coal Creek SR-2 Coal Creek above confluence with Slate River SR-3 Coal Creek above Wildcat Creek SR-S4 Keystone Mine SR-5 Coal Creek below Eik Creek SR-5A Coal Creek at Irwin SR-6 Slate River above Coal Creek SR-7 Oh-Be-Joyful Creek above Slate River SR-8 Slate River above Oh-Be-Joyful Creek See Figure 18 on p. 47 for location of sites. Parameters: Ph., Temperature, Conductivity, Bicarbonate, Carbonate, Alkalinity, Carbon Dioxide, Hardness, Dissolved Calcium, Dissolved Magnesium, Cadmium, Copper, Iron, Lead, Manganese, Nickel, Zinc Metals measured in total and dissolved forms. Purpose of Study: The purpose of this study was to determine the extent to which mining activities have affected the water quality in this particular area and 17 other areas in Colorado. More specifically the authors' intent was to determine what metals entered the streams, how far they traveled downstream, how they varied seasonally, and what mechanisms were responsible for their transport and removal from the aqueous phase. Other aspects of the study: All data for the Slate River Drainage are presented on pp. 140-150. Sampling in this area occurred in March and June of 1973 and does not reflect low flow conditions.