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Andy Rodriguez <br />September 26, 2011 <br />Page 2 <br />DRMS is included under the approaches numbere <br />also be provided to this office (the Division of Wat <br />In accordance with approach nos. 1 and 3, <br />obtained for $1,053,118.61 through the Division of <br />assure that depletions from groundwater evaporat <br />events, that would lead to the abandonment of the <br />Depletions <br />Currently 3.82 acres of ground water surface is <br />ponds. Consumptive use from the operation of this sit <br />control, 1.23 acre -feet used in the production of 10,00 <br />evaporation from the 3.82 acres of exposed lake surfa <br />for this plan period. The total consumption at this site <br />operations is 15.57 acre -feet. <br />Dewatering at the site commenced in October <br />2004 dewatering decreased to 350 gallons per minute. <br />dewatering purposes was pumped from trenches into <br />Thompson River. In September 2004, pumping of the <br />water pumped from the trenches since September 200 <br />and used for the purposes described in this plan. Bas <br />Applicant there are no depletions from past dewatering <br />this plan period. <br />The depletions from evaporation and dust suppr-ssion were lagged to the stream using a Glover <br />analysis and assuming a distance to the stream of 1,01 ' feet, distance to the impermeable boundary of <br />2,976 feet, transmissivity of 100,000 gal /day /ft and spec fic yield of 0.2. The depletions from well no. <br />60729 -F (concrete production) were also lagged to the sream using a Glover analysis and assuming a <br />distance to the stream of 1,510 feet, distance to the imp rmeable boundary of 2,587 feet, transmissivity <br />of 100,000 gpd /ft and specific yield of 0.2. <br />Replacements <br />The proposed source of replacement for the Be <br />credits (15.87 acre -feet) available under the Town of M <br />Division 1 Water Court in consolidated case nos. 2002 <br />from Milliken accrue to the Big Thompson River in the <br />the Bernhardt Pit impacts the river, therefore, no river • <br />the Lease Agreement for the Town of Milliken was sub <br />is attached to this letter. <br />A monthly breakdown of depletions and replace <br />was submitted with your report. <br />Conditions of Approval <br />I approve the proposed substitute water supply <br />C.R.S., subject to the following conditions: <br />• <br />1 — 3, a copy of that information needs to <br />r Resources). <br />ou have indicated that a bond has been <br />eclamation, Mining, and Safety ( "DRMS ") to <br />on do not occur in the unforeseen event, or <br />Pit. <br />exposed at the Bernhardt pit within the settling <br />consists of 3.33 acre -feet for on -site dust <br />tons of concrete and 11.01 acre -feet of <br />e. There is no aggregate production proposed <br />uring the period of this plan from mining <br />003 at a rate of 750 gallons per minute. In <br />All water pumped in 2003 and 2004 for <br />n on site pond for recharge back to the Big <br />•ewatering water into the pond ceased. All <br />has been pumped from within the slurry wall <br />d on the analysis previously performed by the <br />operations that will accrue to the river during <br />nhardt pit is leased excess augmentation <br />illiken ( "Milliken ") decree approved by the <br />W339 and 2005CW59. The excess credits <br />ame location that the lagged depletions from <br />onveyance losses will be assessed. A copy of <br />itted to this office on September 22, 2011, and <br />ents is shown in the attached Table No. 4 that <br />Ian in accordance with Section 37 -90- 137(11), <br />