2013-10-22_HYDROLOGY - M1987049 - Laserfiche WebLink

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�u0,_ ZD 3 Table IA Ready INIR-ed Concrete Company - Bromley Lakes Site & North Tower Pit Depletion Analysis (August 2013 - December 2015) Proposed SN1'SP Operations (all values in acre -feet unless specified) [v) f2 L3 1 L1 � c`) 4a Notes: [I] Total surface area of exposed ground water is conservatively projected to be 53.1 acres from August 2013 through July 2014 and 49.9 acres from August 2014 through December 2014 (28 acres at North Tower Pit, 20.6 acres at Bromley Lakes Cell 2, 0.3 acres at Ready Mixed Pit I `Bromley Cell 3, and 4.3 acres at Arends, Reinoehf, and Archuleta Pits from 2013 through July 2014 which will be back filled to no more than I acre by August 2014), [21 Gross evaporation rate equals 44.52 inches (3.71 ft) per year, based upon NOAA Evaporation Atlas. Monthly distribution based upon SB -120 Guidelines. 131 Effective precipitation rate equals 70;o of total precipitation, based upon average precipitation at the Brighton weather station. [4) Net evaporation equals [21- [3). [5) Historical ET credits at the Nonh Tower Pit from 7.4 acres of pasture grass using ground water at a depth of 4 feet (does not include an effective precipitation credit). [61 Net evaporation equals the net evaporation volume minus the historical ET credits, [11 x [4V12 - (5) [71 Production above the static ground water table or within the slurry wall liner at Ready Mixed Pit I /Bromley Cell 3 once the liner has been approved by the State which requires 2% replacement water by weight, and production below the static ground water (G W) table which requires 4 1a replacement water by weight. Since the exact timing of production above the ground %voter table is not known, projections conservatively show all production requiring 4`6 replacement. (8) Wash water and aggregate moisture content equals 2 °o by weight or 40a b) weight per column 7. [9) Total site depiction equals 161 + [8]. [ 10) Lagged site depletion equals the depletion in column [9) lagged over 12 months plus depletions from previous lagging patterns. IJ BBA Exposed Gross Effective Net Historical Net Gravel Production Aggregate Total Lagged Ground Fvaporation Precipitation Evaporation North F%aporation Requiring Requiring Moisture Site Site Water Area Rate Rate Rate Tosser Pit 2 °o Repl 4 °e Repl. Content Depletion Depletion (acres) (inches) (inches) (inches) ET Credits (tons) (tons) Depletion Month 111 [21 3 4 5 1 [61 J71 f8l 9 10 Aug 53.1 6.01 12 4.8 0.6 20.5 0 160,000 4.7 25.2 25.0 Sep 53.1 4.45 0.9 3.6 OA 15.4 0 160,000 47 20.1 21,6 �(7c1 ____ -_ 53.1 _ 3.12 ._ 0.5^ 2.6 _0.2 11.4 0 140,000 41 15.5 18.3 [v) f2 L3 1 L1 � c`) 4a Notes: [I] Total surface area of exposed ground water is conservatively projected to be 53.1 acres from August 2013 through July 2014 and 49.9 acres from August 2014 through December 2014 (28 acres at North Tower Pit, 20.6 acres at Bromley Lakes Cell 2, 0.3 acres at Ready Mixed Pit I `Bromley Cell 3, and 4.3 acres at Arends, Reinoehf, and Archuleta Pits from 2013 through July 2014 which will be back filled to no more than I acre by August 2014), [21 Gross evaporation rate equals 44.52 inches (3.71 ft) per year, based upon NOAA Evaporation Atlas. Monthly distribution based upon SB -120 Guidelines. 131 Effective precipitation rate equals 70;o of total precipitation, based upon average precipitation at the Brighton weather station. [4) Net evaporation equals [21- [3). [5) Historical ET credits at the Nonh Tower Pit from 7.4 acres of pasture grass using ground water at a depth of 4 feet (does not include an effective precipitation credit). [61 Net evaporation equals the net evaporation volume minus the historical ET credits, [11 x [4V12 - (5) [71 Production above the static ground water table or within the slurry wall liner at Ready Mixed Pit I /Bromley Cell 3 once the liner has been approved by the State which requires 2% replacement water by weight, and production below the static ground water (G W) table which requires 4 1a replacement water by weight. Since the exact timing of production above the ground %voter table is not known, projections conservatively show all production requiring 4`6 replacement. (8) Wash water and aggregate moisture content equals 2 °o by weight or 40a b) weight per column 7. [9) Total site depiction equals 161 + [8]. [ 10) Lagged site depletion equals the depletion in column [9) lagged over 12 months plus depletions from previous lagging patterns. IJ BBA