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sedimentation pond 003 was utilized for a demonstration project to test <br /> a larger pond for its effectiveness to settle suspended solids. This <br /> project began in June and continued until mid-December. Data obtained <br /> was utilized for the design of Pond 005. All data collected from this <br /> project is contained in Appendix 7 . Results of the study indicated <br /> that suspended solids could be settled out to meet effluent discharge <br /> limitations without the use of chemical additives by a longer holding <br /> time provided by the larger pond. <br /> Mine water discharge at the New Elk west portal ( station <br /> WPD-1 ) has been monitored since March of 1987 . Water was encountered <br /> during the March, April and May 1987 samplings with no discharge for <br /> the remainder of 1987 or 1988 (Table 1-8 of Appendix 1 ) . Water quality <br /> is similar to that monitored at station MDNE-1 . Water appears to be a <br /> sodium-bicarbonate type low in TSS and metal concentrations . <br /> Ciruela Canyon has a drainage area of 1745 acres with primary <br /> land uses of grazing and wildlife habitat. Cover in the canyon is <br /> primarily woodland with a herbacous valley bottom. There are two <br /> on-stream impoundments which catch surface flow for livestock <br /> watering. Two seeps were monitored (Appendix 4) which were not major <br /> contributors to stream flow. Two surface water stations were monitored <br /> in Ciruela Canyon. CCS-1 is above the Golden Eagle Mine Discharge. <br /> Only minor seepage events of five gpm or less were observed during the <br /> year (Table 1-6 of Appendix 1 ) . CCS-2 is located at the confluence <br /> with the Purgatoire River. Flow at this station during the year was <br /> primarily the result of the Golden Eagle Mine Discharge. Flow and <br /> water chemistry measured at the station (Table 1-7 of Appendix 1 ) was <br /> similar to that of Station MDGE-l . All data is summarized in Table <br /> 1-12 of Appendix 1 for the previous four-year period. The water at <br /> both CCS stations is a sodium-bicarbonate type resembling the discharge <br /> rather than Purgatoire water. <br /> Station SCF-1 is located in Santistevan Canyon approximately <br /> one-half mile from the Purgatoire River. The stream was determined to <br /> be perennial at the station as measured by the flume recorder. <br /> -15- <br />