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Greg Lewicki And Associates, PLLC <br /> 3375 W.Powers Circle Phone:(720)842-5321 Fax(303)346-6934 <br /> Littleton,CO 80123 E-mail: info(cJcwicki.biz <br /> May 26, 2020 <br /> Colorado Division of Reclamation, Mining, and Safety <br /> 1313 Sherman St, Rm 215 <br /> Denver, CO 80203 <br /> Trout Valley Ranch M-2016-080—Technical Revision <br /> Groundwater Exposure for use as Recirculation Pond Expansion <br /> In addition to certain renewable water supplies procured and applied to Trout Valley Ranch by <br /> virtue of its currently approved Substitute Water Supply Plan (SWSP WDID 230235374),the <br /> Trout Valley Ranch sand and gravel operation has access to water rights that allow for water <br /> exposure on the property. This includes both water surface within the sand and gravel pit and <br /> ponds outside the current affected area boundary. See the correspondence from Division I Water <br /> Commissioner Garver Brown attached to this application, as well as the currently approved <br /> SWSP. <br /> Based on decreed water right, Brannan Sand and Gravel Company, LLC (the permittee)will be <br /> expanding its water recirculation pond to accommodate operational needs. This expanded <br /> recirculation pond will also be dug deeper than previous ponds and involve incidental excavation <br /> below groundwater. This will enhance sediment drop out from wash plant output water. As <br /> required by the rules and regulations of the Mined Land Reclamation Board,this revision <br /> addresses how the proposed operational change will preserve the prevailing hydrologic balance <br /> in terms of both water quantity and water quality. <br /> Maps C-2, C-3, F-1, and F-2 of the permit have been revised to reflect the proposed recirculation <br /> pond. They are attached to this letter. <br /> 1. Recirculation Pond—Mining Plan <br /> The recirculation pond will typically be situated on the periphery of mining operations (Map C- <br /> 2, note also that existing ponds may be incorporated as the recirculation pond, consistent with <br /> water management and the decree,to expedite the creation of new silt capacity). This pond will <br /> receive output water from the wash plant located in the processing area. Capturing sediment <br /> (fines and silt from crushed rock) is best done using a pond or sequence of ponds that allow for <br /> the sediment to drop out and the clean water to be reused. This process of recirculation reduces <br /> the water consumption needs of the wash plant and prevents sediment from leaving the site. <br /> Trout Valley Ranch TR <br /> May 2020 1 c:rcg t ewicti and Asseciata,ri u <br />