Laserfiche WebLink
continues in the described manner around the perimeter of the <br /> <br />I • <br />pond starter dike, and upon completion of one .depositional <br />lifE (3-5 feet) is repeated by moving the cyclone as needed. <br />This method of deposition creates a fingering type of zonation <br />between slimes and coarse grained tailings placed during subse- <br />quent depositional lifts (see figure a-3 )• The new tailings <br />disposal system was a significant improvement over disposal <br />practices conducted at the milling operation in the past because <br />it eliminated tailings slurry spills which frequently occurred from <br />the launders during transport reducing the amount of acreage impacted <br />by the operation. More importantly use of the cyclone for tailings <br />particle segregation allows construction of an impoundment with <br />increased structural integrity than was attainable with the spigot <br />system. <br />A decant system is still employed for dewatering the pond interior <br />to control hydrologic pressures on the coarse embankment. Water <br />released from the pond through the decant system is discharged at <br />two locations, outfalls 002 and 003, which are assigned effluent. <br />limitations, and.monitoring requirements by the Colorado Department - <br />of Health Water Quality Control Division. A process water f7ow~:heet <br />for the Mayflower Mill facility is presented in Figure D-~. W:~ter <br />diversion and impoundment activities associated with the mill o~~era- <br />tion are discussed in greater detail in Exhibit G. <br />i <br />Earth moving operations associated with milling operations con- <br />_J <br />ducted under Standard Metals Corporation direction have consisted <br />solely of over burden excavation at the currently active mill <br />tailings disposal site. Over burden disturbance activities were <br /> <br />~6. -_-1 <br />_ <br /> <br /> <br />