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Table 1a <br />Polly Mann Pit (aka M &G Pit, DMG Permit No. M- 1986 -079) <br />Substitute Water Supply Plan Evaporation Depletions <br />(al( values in acre -feet, unless otherwise noted) <br />(1) (2) (3) (4) 151 (61 (71 IAN <br />Month <br />EVAPORATION DEPLETIONS <br />Gross Evap. Avg. Monthly Effective Net Evap. Net Evap. Exposed Total Evap. Lagged <br />Rate (in) Precip (in) Precip. (in) Rate (in) Rate (ft) Area (ac) Evap. <br />Apr -14 <br />3.95 <br />044 <br />0 31 <br />-364 <br />-030 <br />23.43 <br />-7 11 <br />-523 <br />May-14 <br />5 27 <br />0.37 <br />0 26 <br />-501 <br />-0.42 <br />23.43 <br />- 9.78 <br />-,694 <br />Jun -14 <br />6.37 <br />1 15 <br />0 81 <br />-556 <br />-0 46 <br />23.43 <br />-10 86 <br />-803 <br />Jul -14 <br />6.59 <br />1 68 <br />1.18 <br />-541 <br />-0.45 <br />23.43 <br />-10.56 <br />-894 <br />Aug-1 4 <br />5.93 <br />2.29 <br />1.60 <br />-4.32 <br />-0.36 <br />23.43 <br />-8.44 <br />-8.57 <br />Se -14 <br />4.39 <br />1 59 <br />1 11 <br />-3.28 <br />-0.27 <br />2143 <br />-6.40 <br />-7.44 <br />Oct -14 <br />307 <br />1 54 <br />1 08 <br />1 -200 <br />-0.17 <br />23.43 <br />-390 <br />-638 <br />Nov -14 <br />1,76 <br />1 77 <br />1 24 <br />-052 <br />-0.04 <br />23 43 <br />-1.01 <br />-466 <br />Dec -14 <br />1.32 <br />0.99 <br />0.69 <br />-0.62 <br />-0.05 <br />23.43 <br />-1.22 <br />-3.59 <br />Jan -15 <br />132 <br />0 88 <br />0.62 <br />-070 <br />-0 06 <br />23.43 <br />-137 <br />-119 <br />Feb-15 <br />1 54 <br />078 <br />0 55 <br />-099 <br />-0 08 <br />23.43 <br />-1.93 <br />-285 <br />Mar -15 <br />241 <br />052 <br />0 36 <br />-205 <br />-017 <br />23.43 <br />-4 00 <br />-371 <br />4/2014 to <br />3/2015 Total <br />4390 <br />14.00 <br />9.80 <br />-34.10 <br />-284 <br />-06.59 <br />-69.42 <br />Notes <br />1 Annual average gross evaporation from NOAA NWS -33, distributed monthly per SEO guidelines for elevations < 6,500 feet <br />2 Average monthly precipitation recorded at Brighton 1 NE climate station (1974 through 2009) <br />3 Equal to (2) ` 70% <br />4. Equal to max ( 0, (1) - (2) ) and set to negative value to Indicate depletion <br />5 Equal to (4) 112 <br />6. Exposed surface area tributary to South Platte River. <br />The site continues to be backfilled so exposed surface area in accounting may be reduced over time <br />7 Non - lagged evaporation from protected exposed surface area (5)' (6) <br />8. Monthly evaporation from current (7) and past years lagged to South Platte River based on Glover Analysis using D =1,500 <br />ft , SS =O 2, Db= 18,500 ft , T= 100,000 gpdtft., alpha = l 16 <br />Fctx 14: i'51-, :W_J 3zrs Ee,,1t 14.114 <br />'N -•.s. ^.ett : `k� =..tF ?z'nnq i t4 i6;4 I I +� AS: <br />ParsonsWater Consulting, LLC 4729 W32nd Ave, Denver, CO 80211 303.667.5067 Page 7 <br />