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Attachment C: Total Diversions <br />Sand and Gravel Production: <br />1. Concrete plant: 2,843.5 gal/day x 140 days/yr = 398,090 gal/yr or 1.22 ac-ft/yr <br />2. Aggregate Wash: 1,100 gpm x 60 min/hr x 10 hrs/day x 140 days/yr = 92,400,000 gal/yr or <br />283.48 ac-ft/yr <br />3. Dust control: 18,480 gal/day x 300 days/yr = 5,544,000 gal/yr or 17.01 acre-feet/ yr <br />4. Product Moisture, calculated using 4% moisture for 131,450 tons aggregate = 3.90 acre-feet/ yr <br />Annual diversions associated with sand and gravel production = 305.61 acre-feet/ yr <br />Evaporation: <br />Annual diversions from evaporation - 348.60 acre-feet, calculated as follows - <br />Gross Evaporation from 105 Acres of Exposed Groundwater <br />Bunn Pit <br />Month <br />Monthly <br />Distribution' <br />N <br />Gross Lake <br />Evaporation <br />(inches) <br />Gross Lake <br />Evaporation <br />(ac-ft/ac) <br />Gross Evaporation <br />105 Acre Lake4 <br />(ac-ft) <br />January <br />0.030 <br />1.20 <br />0.10 <br />10.50 <br />February <br />0.035 <br />1.40 <br />0.12 <br />12.60 <br />March <br />0.055 <br />2.20 <br />0.18 <br />18.90 <br />April <br />0.090 <br />3.60 <br />0.30 <br />31.50 <br />May <br />0.120 <br />4.80 <br />0.40 <br />42.00 <br />June <br />0.145 <br />5.80 <br />0.48 <br />50.40 <br />July <br />0.150 <br />6.00 <br />0, 50 <br />52.50 <br />August <br />0.135 <br />5.40 <br />0.45 <br />47.25 <br />September <br />0.100 <br />4.00 <br />0.33 <br />34.65 <br />October <br />0.070 <br />2.80 <br />0.23 <br />24.15 <br />November <br />0.040 <br />1.60 <br />0.13 <br />13.65 <br />December <br />0.030 <br />1.20 <br />0.10 <br />10.50 <br />Annual Total <br />1.00 <br />40.00 <br />3.32 <br />348.60 <br />1 From General Guidelines for Substitute Water Supply Plans for Sand & Gravel Pits (updated 04/01/2011) <br />2 Calculated as annual evaporation (40 inches) from NOAA Technical Report 33 x monthly distribution <br />3 Conversion from inches to acre-feet <br />4 Gross Lake Evaporation (ac-ft/ac) x 105 acre free water surface <br />Total annual diversions (sand and gravel production, product moisture loss and evaporation) = 654.21 <br />acre-feet <br />