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Table-1 MAXIMUM VALUES <br />Martin Marietta Materials <br />Parkdale Project M-97-054 <br />Substitute Supply Plan - Evaporative Losses <br />(1) (2) (3) (4) (5) (6) (7) <br />Percent of Gross Lake Effective Net Lake Total Evaporative <br />Annual Evaporation Preciptation Preciptation Evaporation Consumptive Use <br />Evaporation (ft) (in) (ft) (acre-ft/acre) (ac-ft) <br />Oct-17 7.0% 5.0 0.27 0.80 0.05 0.22 1.11 <br />Nov-17 4.0% 5.0 0.15 0.60 0.04 0.12 0.59 <br />Dec-17 3.0% 5.0 0.12 0.49 0.03 0.09 0.43 <br />Jan-18 3.0% 5.0 0.12 0.41 0.02 0.09 0.46 <br />Feb-18 3.5% 5.0 0.13 0.50 0.03 0.11 0.53 <br />Mar-18 5.5% 5.0 0.21 0.86 0.05 0.16 0.80 <br />Apr-18 9.0% 5.0 0.35 1.40 0.08 0.26 1.32 <br />May-18 12.0% 5.0 0.46 1.60 0.09 0.37 1.83 <br />Jun-18 14.5% 5.0 0.56 1.13 0.07 0.49 2.45 <br />Jul-18 15.0% 5.0 0.58 1.80 0.11 0.47 2.35 <br />Aug-18 13.5% 5.0 0.52 1.88 0.11 0.41 2.04 <br />Sep-18 10.0% 5.0 0.38 1.01 0.06 0.32 1.62 <br />Total 100%- 3.83 12.5 0.73 3.11 15.53 <br />Final Exposed Water Surface = 5.0 acres -Settling ponds, a gravel washing pond, and dewatering trenches <br />Annual Precipitation = 12.5 inches <br />-Taken from Western Regional Climate Center <br />Gross Annual Evaporation =46 inches -Taken from NOAA Technical Report NWS 33 <br />Notes <br />(1) Taken from State Engineer's Guidelines for Gravel Pits at elevations below 6500 feet. <br />(2) Estimate of exposed water surface area for 2017-18 <br />(3) Taken from NOAA Technical Report NWS 33 Map 3 and distributed monthly according to Percent of Annual Evaporation (1). <br />(4) From Western Regional Climate Center Canon City station #51294 (1948-2005). <br />(5) Effective Precipitation equals 70% of Average Annual Precipitation, 70% * (4). <br />(6) Gross Evaporation minus Effective Precipitation converted to units of feet, (3) - (5). <br />(7) Total Evaporative Loss is the product of Net Evaporation (6) and Exposed Water Surface (2) and % of month Not Frozen <br />Month <br />Exposed Surface <br />Area <br />(ac)