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COLORADO <br /> Division of Water Resources <br /> Department of Natural Resources <br /> Water Division 2-Main Office <br /> 310 E. Abriendo Ave, Suite B <br /> Pueblo, CO 81004 <br /> February 16,2015 <br /> J.C.York, P.E., Principal <br /> J&T Consulting, Inc <br /> 305 Denver Avenue, Suite D <br /> Fort Lupton, CO 80621 <br /> Re: West Farm Gravel Pit Slurry Wall <br /> Slurry Wall 90-Day Performance Test Final Report <br /> Sections 33&28,T22S, R46W,6th PM <br /> M-08-078 <br /> Water Division 2,Water District 67 <br /> Dear Mr York: <br /> The purpose of this letter is to approve the lining of the above referenced site based on your February 12,2015 submittal <br /> of the Performance Test report and documentation. The measured outflow due to pumping indicate that this site has <br /> been lined to the design standard referenced in the August, 1999 State Engineer Guidelines for Lining Criteria for <br /> Gravel Pits. Meeting the design standard requires that all water inflows and outflows for this site must be <br /> accounted for on at least a monthly basis. I understand from your letter report that GP Aggregates, LLC will be <br /> responsible for providing the monthly water accounting. Please provide the specific contact information of the <br /> person who will be responsible for this reporting at your earliest convenience, but no later than February 27, <br /> 2015. <br /> Please call me if you have any questions. <br /> Sincerely, <br /> 16M 141 44"- <br /> Bill W.Tyner, P E. <br /> Assistant Division Engineer <br /> Enclosure <br /> CC: Rebecca Nichols,Water Commissioner,Water District 67 <br /> Lonnie Spady,Water Commissioner,Water Districts 17/67 <br /> Charlie DiDomenico,Augmentation Coordinator Rachel Zancanella, Engineering Support <br /> Melissa Peterson, Denver SEO Team 237 Dan DiRezza,Ground Water Commissioner <br /> Michelle L. Hatcher,Clear Water Solutions Don Higbee, LAWMA <br /> OF o <br /> � 1 <br /> 310 E. Abriendo Avenue, Suite B, Pueblo, CO 81002 P 719.542.3368 F 719 544.0800 www.water.state.cc.us ``` O <br /> ,r r- <br /> �1876 <br />