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TABLE 1 EVAPORATION DEPLETION ANALYSIS NORTH DAHLIA PIT COOLEY GRAVEL COMPANY GROSS GROSS GROSS PRECIP EFF POT.CU MAX SOIL ACCUM. NET NET MONTH EVAP EVAP EVAP PRECIP PASTURE CU MOIST. SOIL EVAR EVAP. GRASS CREDIT BUILDUP MOIST. DEPL DEPL in.) ac.ft. in.) (in.) in. in.) in.) in. in.) (ft.) COLUtiM 1 2 2a 3 4 5 6 7 8 9 10 JAN 3.0 1.31 0.11 0.51 0.46 1.31 -0.85 0.11 0.00 0.00 FEB 3.5 1.52 0.13 0.69 0.62 1.52 -0.90 -0.79 0.79 0.07 MAR 5.5 2.391 0.20 1.21 1.09 0.24 0.85 0.06 2.15 0,18 APL 9.0 3.921 0.33 1.81 1.63 1.401 1.40 2.52 0.21 MAY 12.0 5.221 0.44 2.47 2.22 3.461 2.22 3.00 0.25 JUN 14.5 6.31 0.53 1.58 1.42 5.181 1.42 4A91 0.41 JUL 15.0 6.531 0.54 1.93 1.74 6.36 1.74 4.79 0.40 AUG 13.5 5.87 0.49 1.531 1.38 5.44 1.38 4.50 0.37 SEP 10.0 4.35 0.36 1.23 1.11 3.34 1.11 3.24 0.27 OCT 7.0 3.05 0.25 0.98 0.88 1.57 0.88 2.16 0.18 NOV 4.0 1.74 0.15 0.82 0.74 0.16 0.57 0.57 1.58 0.13 DEC 3.0 1.31 0.11 0.55 0.50 0.11 0.39 0.96 1.20 0.10 TOTAL 100.00 43.50 3.63 15.31 13.78 26.75 30.80 1 2.57 January and February have frozen water surface Pasture grass is not irrigated Column 1. Evaporation distribution from draft criteria dated December, 1994. 2. Mean annual evaporation from NWS 33. 3. Mean monthly precipitation from Stapleton station. 4. 90% of total precip. (col. 3). 5. Potential consumptive use for pasture grass from Modified Blaney-Griddle technique. 6. Frozen months- equal to gross evap. (Col. 2). Non-growing season months = 20% of gross evap. (col. 2). Growing season month = lesser of eff. precip. (col. 4) or potential C.U. (col. 5). 7. Frozen months- Col. 4 - col. 2. Non-growing season - col. 4 - col. 6. 8. Accumulation of col. 7 9. Frozen months =greater of col. 7 or col. 8 (absolute value). All other months - col. 2 - col. 6. HATTON WATER CONSULTANTS-31 JuH95-9W 10REEF/JOBSICOOLW DAHLSSP Page 13, EXHIBIT G-1