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Map <br />Structure Built <br />Stage of Project <br />C -2 <br />Diversion ditches 2 & 3; Collection Ditches 2,3, & 4; <br />Sediment Ponds 2 & 3; Hay bales placed south of Sediment <br />Pond 2. <br />Preparing site for mining; <br />Regrading Revenue waste slope <br />C -3 <br />Initial Diversion Ditch 1; Initial Collection Ditch 1; <br />Sediment Pond 1 <br />Preparing Atlas waste pile area; <br />Finishing Revenue waste pile <br />area <br />C -4 <br />Diversion Ditch 1 & 1B (final location); Collection Ditch 1 <br />(final location) <br />Expansion of Atlas waste pile to <br />final footprint; Revenue waste <br />pile capped and vegetated by <br />this point. <br />4.7 Surface Water Control System Construction Timeline <br />The table below dictates when in the Revenue Mine's operation what sediment control structures will <br />be built, and what map that situation can be seen on. <br />Table G -8 — Construction Timeline <br />5. Revenue Area Water Balance <br />The Revenue Mine ground water and surface water system can best be described using a water balance <br />diagram showing how the water systems of Revenue will interact with the existing water system on <br />site. The values in Figure G -1 are based on rough water flow proportions extrapolated from Q4 2011 <br />and Q1 2012 measurements and input from Revenue personnel. The flows will vary dramatically from <br />season to season, as seen in the historical data found in Appendix 3. Since the source of ground water <br />in the mine is snow melt water passing through fracture systems in the mountain above, there may be <br />lag time between changes in surface water flows and the ground water flows. <br />Revenue Mine August 2012 G -23 <br />