Laserfiche WebLink
<br /> <br />the system is for spray-induced evaporation, conservatively <br />estimated to be about 15 percent of the amount pumped to the top <br />of the heap. n~tmim a total 1100 GPM canbined spray rate Over <br />240 days of operation (Homing 20 hours/day), the maximum <br />estimated annual water loss is 47.52 million gallons for the total <br />system. <br />An Overall water balance is shown below and is based on the <br />maxianim annual precipitation of 33 inches: <br />In: Precipitation 25,710,000 gallons <br />out: Absorption in Ore Negl. <br />Evaporation from Fords, Unsprayed <br />Part of Heap, Ditches Negl. <br />Evaporation from Spraying 47,520,000 gallons <br />B. <br />Net: Make-up Water Required 21,810,000 gallons <br />As indicated, urr3er worst-case conditions, an annual water make-up <br />will be required, consistent with zero-disrhasge of the facility. <br />For an average precipitation year of 18.2 inches, the calculated <br />water make-up would, of course, be significantly higher. <br />Cesi~ for Maximum Solution Capacity - 1989 IeadLug Season <br />'IY~e max;miim solution surge capacity designed to pmtec't against <br />discharge order the most severe conditions, will be provided by <br />additional pond capacity. <br />Design for maximnn solution capacity is based on a 100-year, 24- <br />hour max;,mm, precipitation event of about 3.5 inches of water, in <br />addition to other factors required for sizing of surge capacity. <br />MaYim,m, solution capacity is designed based on the following <br />sequence of events: <br />Day 1-6: Steady precipitation at 0.1"/day. No evaporation <br />achieved by heap spraying. <br />Day 7: 100 year, 24-hour maxi~mim precipitation event. No <br />evaporation achieved by heap spraying. <br />Day 8: No precipitation. F'imq~s down - no evaporation <br />achieved. Complete denaturation of heap modules <br />under spray (10 gal/ton of ruck). <br />3 <br />