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Month <br />Percent of <br />Annual <br />Evaporation <br />(A) <br />Gross Lake <br />Evaporation <br />(ft) <br />_ (6) <br />Precipitation <br />(in) <br />(C) <br />Effective <br />Precipitation <br />(ft) <br />(D) <br />Net Lake <br />Evaporation <br />(acre - ft/acre) <br />(E) <br />Total Lake <br />Evaporation <br />(ac -ft) <br />(F) <br />Lagged <br />Depletions <br />(ac -ft) <br />(G) <br />Apr -12 <br />9.0% <br />0.38 <br />1.23 <br />0.07 <br />_ <br />0.30 <br />5.07 <br />4.18 <br />May -12 <br />12.0% <br />0.50 <br />1.48 <br />0.09 <br />0.41 <br />6.91 <br />5.68 <br />Jun -12 <br />14.5% <br />0.60 <br />1.37 <br />0.08 <br />0.52 <br />8 76 <br />7.21 <br />Jul -12 <br />15.0% <br />0.63 <br />1.92 <br />0.11 <br />0.51 <br />8.57 <br />7.66 <br />Aug -12 <br />13.5% <br />0.56 <br />2.09 <br />0.12 <br />0.44 <br />7.36 <br />7.12 <br />Sep-12 <br />10.0% <br />0 42 <br />0.84 <br />0.05 <br />0.37 <br />6.14 <br />6.27 <br />Oct -12 <br />7.0% <br />0.29 <br />0.74 <br />0.04 <br />0.25 <br />4.15 <br />4.90 <br />Nov -12 <br />4.0% <br />0.17 <br />0.52 <br />0.03 <br />0.14 <br />2.28 <br />3.38 <br />Dec -12 <br />3.0% <br />0.13 <br />0.34 <br />0.02 <br />0.10 <br />1.75 <br />2.56 <br />Jan -13 <br />3.0% <br />0.13 <br />0.32 <br />0.02 <br />0.11 <br />1.77 <br />2.30 <br />Feb-13 <br />3.5% <br />0.15 <br />0.30 <br />0.02 <br />0.13 <br />2.14 <br />2.39 <br />Mar -13 <br />5.5% <br />0.23 <br />0.85 <br />0.05 <br />0.18 <br />3.00 <br />2.88 <br />Total <br />100% <br />4.17 <br />12.00 <br />0.70 <br />3.47 <br />57.89 <br />56.54 <br />Table No. 1 <br />Martin Marietta Materials <br />Rich Pit, M-85 -218 <br />Substitute Water Supply Plan - Evaporative Losses in 2012 at Active Pit <br />Total Exposed Water Surface = <br />Annual Precipitation = <br />Gross Annual Evaporation = <br />167 <br />12.00 <br />50 <br />11hetculesU'wpcts1101 W Lafarge SNSPs SWSPs Ark ansas 2012 Rich Pit SW&P.1xupply Demand -kith 1 - WY 2012 xlsx <br />2/15/2012 <br />acres at active pit <br />inches - Estimated using CDSS website <br />inches - Estimated using NOAA Technical Report NWS 33 <br />(A) Percent of annual evaporation from SEO guidelines for elevations < 6,500 feet <br />(B) Gross lake evaporation, (6) = (A) [gross annual evaporation /12] <br />(C) Annual total from CDSS, monthly distribution estimated using precipitation data from Colorado Climate Center website for Pueblo, CO Weather Station <br />(D) Effective precipitation, (D) = [(C) /12) • 70% <br />(E) Net lake evaporation, (E) = (B) - (D) <br />(F) Total lake evaporation, (F) = (E) * exposed surface area <br />(G) Lagged evaporative depletions from Appendix A <br />Applegate <br />G roup, i.. <br />