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There will be a range of application rates as are suited to the pressure capabilities of the <br />system. The application rates could range from 0.002 to 0.007 gpm/ft under present <br />designs. The average application is anticipated to be 0.003 gpm/ft <br />Two pipelines will be constructed from the AGADR to the SGADR to transfer fresh <br />water and barren solution from the AGADR as needed. The barren pipeline will be 24- <br />inches in diameter and will be double - walled when outside of lined containment. The <br />fresh water line will be 12- inches in diameter. <br />7.2.5 SGVLF Water Balance <br />A dynamic, probabilistic water balance model was developed and used to support the <br />design of the SGVLF. The water balance model is the same as that used and approved <br />for the AGVLF and considers normal operating volume, 12 -hour draindown volume <br />during pump outages, solution accumulation due to seasonal climatic variation at a 95 <br />percent confidence level, the 100 -year, 24 -hour design storm event and available pore <br />space of the ore within the PSSA. The model incorporates probability to simulate <br />variability in the site climate, consistent with approved amendments. The model also <br />simulates variability in both precipitation and evaporation for inflows and outflows for <br />the SGVLF. Draindown and uptake functions used in this model were calibrated against <br />actual measurements of solution flow and PSSA levels at the existing AGVLF. The <br />results are contained in Appendix 9, Volume V of this document, and summarized below. <br />The SGVLF water balance model has the following components: <br />• Climatic data inputs for precipitation and evaporation <br />• Ore loading, facility volumes, areas of coverage, and phases <br />• Material properties for initial moisture contents, field capacity, leaching moisture, <br />and moisture uptake <br />• Process solution flows from the PSSA to the SGADR <br />• Solution application rates <br />The capacity of the PSSA was calculated based on the average ore depth of 175 feet <br />presented in the ore - stacking plan. Using a load - porosity relationship for Cresson ore, <br />the model calculates a porosity of 0.35 and yields a pore volume of 175.5 million gallons <br />at an elevation of 9,445 feet amsl - 5 feet below the PSSA crest. Eighty percent of the <br />total PSSA volume is 140.5 million gallons. The model shows that the PSSA is predicted <br />to fully contain solutions reporting to the PSSA through the life of the SGVLF. <br />Cripple Creek & Victor Gold Mining Company <br />Cresson Project Mine Life Extension 2 <br />7 -14 <br />