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Epvi* roi)n) ei)t, lC. <br /> LARRY E.O'BRIAN 7985 VANCE DRIVE,SUITE 205A <br /> FOUNDER ARVADA,COLORADO 80003 <br /> STEVAN L.O'BRIAN 303-423-7297 <br /> PRESIDENT FAX 303-423-7599 <br /> October 24 , 2014 <br /> Mr. Tyler O' Donnell <br /> fDivision of Reclamation, Mining & Safety <br /> 1313 Sherman St, Suite 215 <br /> Denver, CO 80203 <br /> RICSIVED <br /> Dear Tyler; OCT 242014 <br /> RE : Albert Frei & Sons, Inc . DIVISION OF RECLAMATION <br /> Worthing Pit - Update Ve MINING AND SAFETY <br /> M.L.R.B. Permit # M-1977-526 <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 /> The in ormation prove ed is also in response to the inspection <br /> report I received on 10-22-14 and includes the actions taken from <br /> the last update on 9/25/14 . <br /> On 9/23/14 the surveyors were able to establish the water <br /> elevations in the drain/historic river channel complex. Here <br /> after I will refer to the drain/historic river channel complex as <br /> the groundwater drain . The attached map is a portion from the <br /> groundwater survey map showing the area discussed. Starting on <br /> the west end and following around the south and east sides they <br /> measured 5004 . 17 at the start of the groundwater drain, where it <br /> entered the old river channel it was 5002 . 52 and at the north end <br /> where the pipeline ROW owners installed the new pipe under the <br /> road it was 5002 . 59 . This new pipe was placed on top of the <br /> historic pipe elevating the height of the water approximately 13 <br /> inches, further restricting the natural drainage from the ground- <br /> water drain. As a reference the groundwater elevation in moni- <br /> toring well #8 in 2002 prior to slurry wall installation or <br /> mining taking place on this end of the Worthing Pit, was 5003 . 8 . <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 . They completed their first draft of the <br /> design and redlines have been made to make minor changes . When <br /> complete they will be ready to go to Urban Drainage for review to <br /> get permission to install the outlet across their ROW. <br /> During a site visit yesterday (10-22-14) Ben Frei observed <br /> that the water elevation was down by 2 to 3 inches in the ground- <br />