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Month <br />Production <br />Mined Water <br />Material Consumed <br />(x 1000 tons) (ac-ft) <br />[11 [ <br />Dust <br />Control <br />(ac -ft) <br />[31 <br />Exposed Water Surface <br />Total Unlagged <br />Depletion <br />from Mining <br />Operation <br />(ac -ft) <br />[10] <br />Total Lagged <br />Depletion <br />from Mining <br />Operation <br />(ac -fl) <br />[11] <br />Gross <br />Evaporation <br />(ft) <br />[ <br />Total <br />Precipitation <br />(t1) <br />[ <br />Effective <br />Precipitation <br />(11) <br />[61 <br />Net <br />Evaporation <br />01) <br />[71 <br />Exposed <br />Groundwater <br />Area <br />(acres) <br />[ <br />Net <br />Evaporation <br />Volume <br />(ac -ft) <br />[91 <br />Feb-13 <br />19.95 <br />0.5869 <br />0.38 <br />0.13 <br />0.04 <br />0.03 <br />0.10 <br />33.90 <br />3.55 <br />4.52 <br />3.02 <br />Mar -13 <br />22.08 <br />0.6498 <br />0.42 <br />0 21 <br />0.08 <br />0.06 <br />0.15 <br />33.90 <br />5.22 <br />6 29 <br />5.53 <br />Apr -I3 <br />21.37 <br />0 6289 <br />0.41 <br />0.34 <br />0 11 <br />0,08 <br />0.26 <br />33.90 <br />8.83 <br />9 87 <br />8.49 <br />May -13 <br />22.08 <br />0.6498 <br />0.42 <br />0.45 <br />0.13 <br />0.09 <br />0.36 <br />33 90 <br />12.23 <br />13.31 <br />11.92 <br />Jun -13 <br />21.37 <br />0.6289 <br />041 <br />0.55 <br />0.10 <br />0.07 <br />0.49 <br />33.90 <br />16.47 <br />17.51 <br />15.84 <br />Jul -13 <br />22.08 <br />0.6498 <br />0.42 <br />0.57 <br />015 <br />0.11 <br />0.46 <br />33.90 <br />15.69 <br />16.76 <br />16.89 <br />Aug -13 <br />22.08 <br />0.6498 <br />0.42 <br />0.51 <br />0.16 <br />0.11 <br />0.40 <br />33 90 <br />13.42 <br />14.49 <br />15.35 <br />Sep-13 <br />21.37 <br />0.6289 <br />0.41 <br />0.38 <br />0.09 <br />0.06 <br />0.32 <br />33.90 <br />10.81 <br />11.85 <br />12.90 <br />Oct -13 <br />22.08 <br />0.6498 <br />0.42 <br />0.26 <br />0.07 <br />0.05 <br />0.21 <br />33 90 <br />7.16 <br />8.24 <br />9.66 <br />Nov -13 <br />21.37 <br />0.6289 <br />0.41 <br />0.15 <br />0.06 <br />0.04 <br />0.11 <br />33.90 <br />3.69 <br />4,73 <br />6.14 <br />Dec -13 <br />22.08 <br />0.6498 <br />0 42 <br />0.11 <br />0.04 <br />0.03 <br />0.08 <br />33.90 <br />2.85 <br />3 93 <br />4.35 <br />Jan -14 <br />22 08 <br />0.6498 <br />0 42 <br />0 11 <br />0.03 <br />0.02 <br />0.09 <br />33.90 <br />2.97 <br />4.04 <br />4.03 <br />13 -14 Total <br />260.00 <br />7.65 <br />5.00 <br />3 78 <br />1.06 <br />0.74 <br />3.03 <br />- <br />102.88 <br />115.53 <br />114.12 <br />Fcb-14 <br />19.95 <br />0.59 <br />0.38 <br />0.13 <br />0.04 <br />0 03 <br />0.10 <br />38.90 <br />4.07 <br />504 <br />4.74 <br />Mar -14 <br />22.08 <br />0.65 <br />0.42 <br />0.21 <br />0,08 <br />0.06 <br />0.15 <br />38.90 <br />5.98 <br />7.06 <br />6.35 <br />Apr -14 <br />21.37 <br />0 63 <br />0.41 <br />0 34 <br />0.11 <br />0.08 <br />0 26 <br />38.90 <br />10.13 <br />11.17 <br />9.68 <br />May -14 <br />22.08 <br />0.65 <br />0.42 <br />0.45 <br />0.13 <br />009 <br />0.36 <br />38.90 <br />14,04 <br />15.11 <br />13.62 <br />Jun -14 <br />21.37 <br />0.63 <br />0.41 <br />0.55 <br />0.10 <br />0.07 <br />0,49 <br />38.90 <br />18.90 <br />19.94 <br />18.14 <br />Jul-14 <br />22.08 <br />0.65 <br />0.42 <br />0.57 <br />0.15 <br />0.11 <br />0.46 <br />38.90 <br />18.00 <br />19.08 <br />19.22 <br />Aug-I4 <br />22.08 <br />0 65 <br />0.42 <br />0.51 <br />0 16 <br />0.11 <br />0,40 <br />38.90 <br />15 39 <br />16.47 <br />17.40 <br />Scp-14 <br />21.37 <br />0.63 <br />0.41 <br />0.38 <br />0.09 <br />0.06 <br />0.32 <br />38.90 <br />12.41 <br />13.45 <br />14.57 <br />Oct -14 <br />22.08 <br />0.65 <br />0.42 <br />0.26 <br />0.07 <br />0.05 <br />0.21 <br />38.90 <br />8.22 <br />9.29 <br />10.83 <br />Nov -14 <br />21.37 <br />0.63 <br />0.41 <br />0.15 <br />0 06 <br />0.04 <br />0.1 I <br />38 90 <br />4.23 <br />5.27 <br />6.79 <br />Dcc -14 <br />22.08 <br />0.65 <br />0.42 <br />0.11 <br />0.04 <br />0.03 <br />0.08 <br />38.90 <br />3.27 <br />4 35 <br />4.80 <br />Jan -15 <br />22.08 <br />0.65 <br />0.42 <br />0.11 <br />0.03 <br />0.02 <br />009 <br />38.90 <br />3.40 <br />4.48 <br />4.46 <br />14 -15 Total <br />260.00 <br />7.65 <br />5.00 <br />3.78 <br />1.06 <br />0 74 <br />3.03 <br />- <br />118.06 <br />130.71 <br />130.62 <br />BBA <br />.,seer tan >u{taue. a 1S110i'- 6ROGOLN ASSOC!ATt. !NC <br />Table 1 <br />Transit Mix - Grisenti Grave[ Pits <br />Projected Depletions from Mining Operation (2013 -2015) <br />Notes <br />[1] Production protections based upon Transit Mix's projected maximum annual production <br />[2] Based upon 4 percent water Toss by weight <br />[3] Dust control projections based upon historical annual pumping, distributed uniformly through the year. <br />[4] Based upon NOAA Evaporation Atlas (45.4 itches per year), distributed monthly based upon State's SB -120 guidelines. <br />[5] Based upon average monthly precipitation data from the NOAA Climate Data (Canon City, 1950 - 2003). <br />[6] Effccuve Precipitation equals 70 percent of total precipitation, based upon the State's S13-120 guidelines, [5] • 0.70. <br />[7] Net Evaporation equals Gross Evaporation less Effective Precipitation, [4] - [6]. <br />[8] Exposed water surface area is currently 28 9 acres as measured on a 2011 aerial photograph. The mined area in Phase 2 is projected to increase by 5 acres in <br />2013, and by another 5 acres in 2014. Exposed water surface areas are conservatively estimated as 33.9 acres in 2013 and 38.9 acres in 2014. <br />[9] Equals [7] • [8]. <br />[10] Total Unlagged Depletion from Mining Operation equals [2] + [3] +1 <br />[111 Total fagged Depletions from Mining Operation arc lagged using URF factors for each mining area, developed in IDS -AWAS employing the glover method. The <br />IDS -AWAS inputs are provided in the 2012 SWSP request. <br />RECEIVED <br />r1oV 0 5 2012 <br />w STA E E H ERS <br />itaemnn ILQlnat: P'S <br />