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Adams County <br /> Arapahoe County <br /> 44. Aurora,CO <br /> E-470 Public Highway Authority Brighton,CO <br /> A& 22470 E.6th Parkway,Suite 100 <br /> Commerce ,CO <br /> Aurora,CO 80018 E470M 303.537.3700 Phone D as County <br /> 303.537.3472 Fax Parker,CO <br /> Public HighwayAuthonty Thornton,CO <br /> ------------------- -- — <br /> RECEIV <br /> June 25,2020 ,JUN 3 p Zug f <br /> Department of Natural Resources ✓h <br /> m - <br /> Attn: Jared Ebert DIJION OF RECIAh�A ION <br /> Colorado Division of Reclamation, Mining& Safety MINING AND SAFETY <br /> 1313 Sherman Street Room 215 <br /> Denver, CO 80203-2243 <br /> Re: Sandy Acres Pit,DRMS Permit No. M-1980-110 <br /> Hydrologic Balance response <br /> Dear Mr. Ebert: <br /> This is a follow up to our October 29,2019 letter regarding water observed at the former Sandy Acres Pit. <br /> Since our last letter we have continued our investigations but to date we have not found the source of <br /> water. The attached memorandum from BBA Water Consultants summarizes the explorative work and <br /> analysis completed to date and the recommended next steps. We are requesting that we follow the <br /> recommendations from our consultant and report our findings back to you on or before July 1, 2021. <br /> If you have any other questions or need more information,please call me at(303) 537-3710. <br /> Sincerely <br /> '0- l <br /> Derek Slack, P.E. <br /> Roadway Maintenance Manager <br />