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Month <br />Percent of <br />Annual <br />Evaporation <br />Gross Lake <br />Evaporation <br />(ft) <br />Preciptation <br />(in) <br />Effective <br />Preciptation <br />(ft) <br />Net Lake <br />Evaporation <br />(acre -ft/acre) <br />Total Evaporative <br />Consumptive Use <br />(ac -ft) <br />Oct -11 <br />7.0% <br />0.27 <br />0.80 <br />0.05 <br />0.22 <br />0.35 <br />Nov -11 <br />4.0% <br />0.15 <br />0.60 <br />0.04 <br />0.12 <br />0.19 <br />Dec -11 <br />3.0% <br />0.12 <br />0.49 <br />0.03 <br />0.09 <br />0.00 <br />Jan -12 <br />3.0% <br />0.12 <br />0.41 <br />0.02 <br />0.09 <br />0.00 <br />Feb -12 <br />3.5% <br />0.13 <br />0.50 <br />0.03 <br />0.11 <br />0.00 <br />Mar -12 <br />5.5% <br />0.21 <br />0.88 <br />0.05 <br />0.16 <br />0.26 <br />Apr -12 <br />9.0% <br />0.35 <br />1.41 <br />0.08 <br />0.26 <br />0.42 <br />May -12 <br />12.0% <br />0.46 <br />1.60 <br />0.09 <br />0.37 <br />0.59 <br />Jun -12 <br />14.5% <br />0.56 <br />1.15 <br />0.07 <br />0.49 <br />0.78 <br />Jul -12 <br />15.0% <br />0.58 <br />1.80 <br />0.11 <br />0.47 <br />0.75 <br />Aug -12 <br />13.5% <br />0.52 <br />1.90 <br />0.11 <br />0.41 <br />0.65 <br />Sep -12 <br />10.0% <br />0.38 <br />1.00 <br />0.06 <br />0.32 <br />0.52 <br />Total <br />100% <br />3.83 <br />12.55 <br />0.73 <br />3.10 <br />4.51 <br />Table -1 <br />Front Range Aggregates, LLC <br />Parkdale Project M -97 -054 <br />Substitute Supply Plan - Evaporative Losses <br />( <br />( <br />Exposed Water Surface = <br />Annual Precipitation = <br />Gross Annual Evaporation = <br />(3) <br />1.6 <br />12.6 <br />46 <br />( <br />Notes <br />(1) Taken from State Engineer's Guidelines for Gravel Pits at elevations below 6500 feet. <br />(2) Taken from NOAA Technical Report NWS 33 Map 3 and distributed monthly according to Percent of Annual Evaporation (1). <br />(3) From Western Regional Climate Center Canon City station #51294 (1948- 2005). <br />(4) Effective Precipitation equals 70% of Average Annual Precipitation, 70 %' (3). <br />(5) Gross Evaporation minus Effective Precipitation converted to units of feet, (2) - (4). <br />(6) Total Evaporative Loss is the product of Net Evaporation (5) and Exposed Water Surface and % of month Not Frozen <br />(5) <br />Applegate <br />Group, <br />(6) <br />acres -3 settling ponds, a gravel washing pond, and dewatering trenche <br />inches -Taken from Western Regional Climate Center <br />inches -Taken from NOAA Technical Report NWS 33 <br />