Laserfiche WebLink
Grand Junction Pipe & Supply Co. <br />Table 1: Monthly Net Evaporation <br />Gunnison River Pits <br />Month <br />Monthly <br />Distribution <br />N <br />1 <br />Gross Lake <br />Evaporation <br />(inches) <br />2 <br />Precipitation <br />(inches) <br />3 <br />Effective <br />Precipitation <br />(inches) <br />4 <br />Net Lake <br />Evaporation <br />(inches) <br />5 <br />Net Lake <br />Evaporation <br />(ac- ftlac) <br />6 <br />January <br />0.030 <br />1.65 <br />0.48 <br />0.34 <br />0.00 <br />0.00 <br />February <br />0.035 <br />1.93 <br />0.46 <br />0.32 <br />1.61 <br />0.13 <br />March <br />0.055 <br />3.03 <br />0.85 <br />0.60 <br />2.43 <br />0.20 <br />April <br />0.090 <br />4.95 <br />0.84 <br />0.59 <br />4.36 <br />0.36 <br />May <br />0.120 <br />6.60 <br />0.95 <br />0.67 <br />5.93 <br />0.49 <br />June <br />0.145 <br />7.98 <br />0.51 <br />0.36 <br />7.62 <br />0.64 <br />July <br />0.150 <br />8.25 • <br />'0.72 <br />0.50 <br />7.75 <br />0.65 <br />August <br />0.135 <br />7.43 <br />0.82 <br />0.57 <br />6.86 <br />0.57 <br />September <br />0.100 <br />5.50 <br />0.96 <br />0.67 <br />4.83 <br />0.40 <br />October <br />0.070 <br />3.85 <br />0.95 <br />0.67 <br />3.18 <br />0.27 <br />November <br />0.040 <br />2.20 <br />0.74 <br />0.52 <br />1.68 <br />0.14 <br />December <br />0.030 <br />1.65 <br />0.58 <br />0.41 <br />0.00 <br />0.00 <br />Annual Totall <br />1.000 <br />1 55.02 <br />1 8.86 <br />1 6.22 <br />1 46.25 <br />1 3.85 <br />(1) From General Guidelines for Substitute Water Supply Plans for Sand & Gravel Pits <br />Submitted to the State Engineer Pursuant to SB 89 -120 & SB 93 -260 (updated September 30, 2009) <br />(2) Calculated as annual evaporation (55 inches) from NOAA Technical Report 33 x monthly distribution <br />(3) Monthly precipitation data for Grand Junction 6 ESE, Colorado station averaged for the years 1962 - 2009 <br />(4) Precipitation x 0.70 (General Guidelines for Substitute Water Supply Plans for Sand & <br />Gravel Pits Submitted to the State Engineer Pursuant to SB 89 -120 & SB 93 -260 (updated September 30, 2009) <br />(5) Gross lake evaporation minus effective precipitation; evaporation occurs when historical mean monthly temperature is <br />greater than 32° F. based on Colorado Climate Center historical mean monthly temperature records for Grand Junction <br />6 ESE, Colorado station for period of 1962 - 2009 <br />(6) Conversion to ac -ft/ac <br />Western Water & Lan <4, Inc. <br />