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L - 11 - <br />1 produce appreciable quantities of water. The deeper fracture <br />' pattern occurs at approximately the same elevation in both <br />wells and produces the most water to the wells. <br /> The hydraulic conductivity of the fractured rock i.s <br />l <br />ti <br />l <br />l <br />i <br />i <br />ll l <br />d <br /> re <br />a <br />ve <br />y <br />ow <br />n both wells, particularly <br />n the we <br />ocate <br /> furthest upstream. Most of the water came from storage~caithin <br />' the well casing and very little from the fractured rock. The <br /> well located further downstream is developed in rock of some- <br />, what higher hydraulic conductivity because of the higher yield <br /> with less drawdown. Both wells are producing at or greater <br /> than their maximum long term sustained yields. Because the <br /> hydraulic conductivity of the metamorphic rocks is low, the <br /> quarry pit will receive the major portion of its water from <br />' surface runoff. Evaporation losses are expected to be greater <br /> than seepage and most of the water will return to the atmosphere. <br />' <br /> The pit formed by the quarrying operation would be expected <br /> to hold water with the major loss therefore being evaporation <br />to the atmos <br />her <br />S <br />i <br />d <br /> p <br />e. <br />ome seepage <br />s expecte <br />to occur, however. <br /> Once the pit is filled with water it would be expected that <br />' there would be an inflow-outflow relationship during the early <br /> portions of the year until the base flow in Strain Gulch dried <br />' up. During the later part of the summer and fall periods, <br /> evaporation would lower the water level which would then be <br />' recharged by spring runoff again. Overflow from the pit could <br /> be either through the pipe provided during the quarry operation <br />' or from a constructed surface channel. <br /> Any alternative utilizing a constructed surface channel <br /> through the operating area of the quarry will require a drop <br />' structure or channel to Strain Gulch east of the fill. This <br /> <br />t drop must be capable of conveying a minimum of 253 cfs :if <br />u <br />st <br />fl <br />d d <br />i <br />i <br /> p <br />ream <br />oo <br />etent <br />on <br />s not incorporated into the reclama- <br /> tion plan drainage design. Utilization of upstream retention, <br /> either in the north quarry pond area or the central pit area, <br />' ~\ Leonard Rice Consulting N'ate~ Enq Weer In[ <br />