2019-12-13_REVISION - M1980244 (59)

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ERC CC&V Water Balance User's Manual November 2019 Figure 6—Sample Result from the Water Balance Model Shown in Table View (Results Shown in Image are for Displaying Table Elements Only, and Do Not Depict Actual Expected Results for Existing Conditions) III Chart ^Table Display probabilities - T� Ctesut Total Apphcab.. Total Appbcati.. Total Applicab.. Total Apphcab.. Total Appkat...j Total Apphcab..Total Apphcati.. Unt 9pm 9pm 9pm i 9pm 9pm 9pm qpm Dspleyn9. Mean S.D Ian 5% 50% 95% Max 10, 2018 5200 0 520D 5I00 5200 5200 5200 111/2018 5200 0 520D 5200 5200 5200 5200 12/12018 5200 0 5200 5200 52DO 5200 5200 1;1/2019 5200 0 520D 5200 5200 5200 5200 2/l/2019 5200 0 5200 5200 52DO 5200 5200 3/1/2019 5200 0 520D 5200 52DO 5200 5200 4/12019 5200 D 5200 5200 5200 5200 5200 5/1/2019 5200 0 5200 5200 5200 5200 5200 6/1/2019 5200 0 5200 5200 5200 52D0 5100 7/V2019 5200 0 5200 52DO 5200 5200 5200 811/2019 5200 0 5200 5200 5200 5200 5200 9/12019 5200 0 52W 5200 5200 5200 52D0 10/1/2019 5200 0 5200 5200 5200 5200 52DO 11/1/2019 5200 0 5200 5200 5200 $200 5200 12J1R019 5200 0 5200 5200 5200 5200 5200 1/1R020 5200 0 5200 5200 5200 5200 5200 2/l/2020 5200 0 5200 5200 5200 5200 5200 3/1/2020 5200 0 5200 5200 5200 5200 5200 4A/2020 5200 0 5200 5200 5200 5200 5200 511/2020 5200 0 5200 5200 5200 52D0 5200 6l1/2020 5200 0 520D 5200 52D0 5200 5200 7/V2020 5200 0 5200 5200 52DO 52DO 5200 8.V2020 5200 D 5200 5200 52DO 5200 5200 9r12020 5200 D 5200 5200 5200 5200 520D 10/1/2020 5200 D 5200 5200 52DO $200 52D0 11/1/2020 5200 0 5200 52DO $200 5200 5200 12/1/2020 5200 0 5200 52D0 5200 5200 5200 11112021 5200 0 5200 5200 5200 5200 52DO 2/1/2D21 5200 0 5200 52DO 5200 5200 5200 3i1/2021 5180 3.862 5170 5113 51,19 5196 5189 %12021 5193 8.181 5167 5172 5198 5200 5200 51V2021 5199 2.614 5183 5193 5200 5200 5200 6/l/2021 5200 0.1756 5198 5200 5200 5200 5200 P1i2021 5198 5.643 5175 5180 5200 5200 5200 &"1%2021 5199 4.699 5165 5198 5200 5200 5200 9/1/2021 5199 3209 5174 $198 5200 5200 5200 10/1/2021 5197 5.385 5177 5185 52DO 5200 5200 11/112021 5189 10.92 5162 5168 5191 5200 5200 12/1/2021 5177 12.52 5146 5155 5M 5197 5200 1/1/2022 5168 15.3 5134 51.10 5169 5193 5200 2/1/2022 5160 18.22 5119 5127 5161 5190 5200 3/12022 5150 19.87 5106 5115 5149 5184 5195 4/1/2022 5149 24.73 5078 5099 5150 5189 5198 5/1/2022 5143 28.73 5065 5088 5142 5198 5200 6/1/2022 5130 35.43 5046 5080 5127 5196 " 7/l/2022 5101 42.32 4986 5036 5096 5176 5196 Water Priorities within the Model The CC&V mine is a complex, interconnected site with multiple solution storage facilities and daily options regarding movement of water within different facilities. Simplifications were required to develop a working water balance model. This model assumes that if there is any water shortage on site during any time step, augmentation demands are met first (from offsite water sources), followed by any demand at VLF2, then at VLF1, and finally any non-VLF water demands. If there is any water surplus at the end of a time step, the excess solution (above minimum required volumes) is stored first in VLF2 Phase 1/2 until that pond reaches its capacity, then in VLF2 Phase 3 until it is full, then in VLF1 PSSA 1, 2, 4, and 5, respectively.These priorities are programmed into the model and cannot be edited by the user. Changing these priorities would require reworking of the model. Results for the total stored water volume and the remaining total capacity in all VI-Fs combined are provided under the"Other Stochastic Results"tab. From this the user can quantify the total amount of excess storage available or the total amount of excess solution over the full system. In practice, operators are expected to manage actual solution levels in the 9