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EpvioroioeiQt, <br /> LARRY E.O'BRIAN 7985 VANCE DRIVE,SUITE 205A <br /> FOUNDER ARVADA,COLORADO 80003 <br /> STEVAN L.O'BRIAN 303423-7297 <br /> PRESIDENT FAX 303-423-7599 <br /> September 25, 2014 <br /> Mr. Tyler O'Donnell <br /> Division of Reclamation, Mining & Safety <br /> 1313 Sherman St, Suite 215 <br /> Denver, CO 80203 <br /> RECEIVED <br /> Dear Tyler; PI(EP 25 2014 <br /> RE: Albert Frei & Sons,. Inc. DIVISION OF RECLAMATION <br /> Worthing Pit - Update MININGANDSAFETY <br /> M.L.R.B. Permit-t-977-26 <br /> On behalf of my client Albert Frei & Sons, Inc . I am submit- <br /> ting this correspondence to update and keep you appraised of what <br /> Albert Frei & Sons, Inc. , is doing to investigate and mitigation <br /> the ground water issues along the south end of the permit area. <br /> In the ast up ate (9/5/14) we explained that once the Stagecoach <br /> Pit investigation ended we would begin to look into this area <br /> with the main idea to install a drainage ditch and/or pipe from <br /> the historic slough/groundwater drain to the South Platte River. <br /> Included in the commitment was a plan to review the current <br /> groundwater drain trench to see if it needed additional improving <br /> and/or redesign. <br /> The proposed drainage structure would parallel the south <br /> line of the water intake easement that bisects the southern <br /> mining area. The idea is to construct the drain and improve the <br /> trench and slough to establish a groundwater elevation that is at <br /> or just below the historic groundwater elevations for the prop- <br /> erty prior to backfilling. <br /> Deere and Ault Consultants was retained on September 16, <br /> 2014 to do a site analysis and design plan for installing the <br /> drain to the river. Albert Frei & Sons, will also be upgrading <br /> the groundwater trench, if appropriate, along the east side of <br /> the southern backfilled area as part of the project. Because the <br /> drain will enter the river along a section where Urban Drainage <br /> armored the river bank, they were contacted to see what was <br /> needed to cross their easement and terminate the drain at the <br /> river. They requested a conceptual plan prior to giving a go <br /> ahead. Deere and Ault completed their site visit on last Friday <br /> (9/19/14) and have started preliminary planning. <br /> Gillian' s Surveying was retained to survey the location of <br /> the drain and obtain the elevations Deere and Ault will use to <br /> design the drain. They will also collect elevations along the <br />