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MINING AND RECLAMATION PLAN MT. GUNNISON NO. 1 MINE October 1979 Revised February 1981 Revised November 10, 1981 Conversely a poor water year will result in reduced spring flow. In good water years, a large number of springs will be perennial, while during poor water years some of these same springs will become intermittent. Table 2.8.I.Q shows stream flow data collected in June, July, August, and September of 1975 and May and September of 1977. Additional spring flow data has been collected since 1977, in the spring (wet season) and fall (dry season) of 1978, 1979, and 1980. Data collected for this period is shown in Table 2.8.1.X. This additional data, plus the 1977 and 1975 data showed that eight springs were found to be flowing at every visit, 85 springs went dry at least one time in that period, and 21 springs flowed in 197T, but had no data for the years 1978, 1979 and 1980. This indicated that at least 75 percent of the springs were intermittent for this period and 7 percent of the springs were found flowing at every visit. Exhibit 2.8.1.U identifies those springs which were intermittent for this period and those which are believed to have flowed continuously. In order to double check this observation afield survey of these springs was completed from September 28 through October 2, 1981. Major landforms near most of the springs indicated that their source is from bedding contacts and not from fractures. Source of the springs were determined by field inspection and double checked in the office using infrared photography. The data from this study is shown in Table 2.8.1.V. Spring water quality samples (Table 2.8.1.R) were obtained from 10 locations. These springs were chosen for water sampling on the basis of geographic distribution, generally reliable flow, availability of previous water quality data, and ease of access. Springs were selected to provide sampling points in each of the 2-253a