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� a%c <br />• <br />Ali roa C. <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 />May 12, 2015 <br />RECEIVED <br />Mr. Tyler O'Donnell <br />Division of Reclamation, Mining & Safety (/MIRY 482015 <br />1313 Sherman St, Suite 215 <br />Denver, CO 80203 DIVISION OF RECLAMATION <br />MINING AND SAFETY <br />Dear Tyler; <br />RE: Albert Frei & Sons, Inc. <br />Stagecoach Pit - Six Month update <br />M.L.R.B. Permit # M-1983-067 <br />On behalf of my client Albert Frei & Sons, Inc. I am <br />submitting this correspondence to update and keep you appraised of <br />what Albert Frei & Sons, Inc., is doing to investigate and <br />mitigation the ground water issues to the east of the Stagecoach <br />Pit. In October 2014 Albert Frei & Sons, Inc. proposed a plan in <br />response to the Divisions September 2014 inspection to collect <br />monthly data from the 6 monitoring wells closest to the mine to try <br />to establish a pattern of groundwater fluctuations after installing <br />items they we thought would reduce the impacts to groundwater <br />elevation around the mine. <br />I have included a life of the mine groundwater monitor data <br />table that starts in 2001 when Lafarge was the operator to the last <br />reading on April 15, 2015. The blank spots are where data was not <br />collected prior to August 2009 when Frei became the mine operator. <br />We did two projects that we believe have had an impact on <br />reducing the groundwater level in the system. The first was to add <br />an extension and meter to the end of the Drain Pipe from the Zigan <br />Lake to the river. The data collected is shown in Table 2. This <br />allow the water in the lake to have a clear path back to the river. <br />The extension was install in September 2014 and at that time we <br />estimated the lake level was 9 inches above the inlet grate. By <br />March 10, 2015 the lake level has dropped to 25 inches below the <br />grate for a total change of 34.0 inches (see photo). On March 26, <br />2015 the grate elevation was established by Gillian Land Consultant <br />(surveyor) and the lake level was surveyed at 5013.53 or 25.50 <br />inches below the top of the grate. The Zigan pipeline has carried <br />