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Ei)vi*rcpn)ei)t,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 />February 4, 2015 <br />Mr. Tyler O'Donnell RE C <br />- -Division of Reclamation, Mining & Safety <br />1313 Sherman St, Suite 215 �' FL <br />Denver, CO 80203 <br />DIVISION OF RECLAMATION <br />MINING AND SAFETY <br />Dear Tyler; <br />RE: Albert Frei & Sons, Inc. <br />Stagecoach Pit - Update #4 <br />M.L.R.B. Permit # M -1983 -067 <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 to the east of the Stagecoach Pit. This <br />information is provided since the last update on 10/24/14. <br />On Tuesday October 7, 2014 the boards were pulled from the <br />inlet structure on the inlet structure in the Zigon Lake. The <br />lake froze up in mid December and until January 29, 2015 when we <br />were no able to access the outlet vault due to the ice cover. <br />When visited the grate was clogged with leaves and flow was <br />greatly reduced. The water level in the outlet vault was down so <br />only half of the outlet pipe was flowing. <br />The result of the clean out and lowering the board in the <br />lake outlet vault is that the water is now above the inlet pipe <br />and the water is approximately 17 inches below the top of the <br />vault and approximately 350 GPM was leaving the lake. Since the <br />last update (85 days) the lake level has dropped an additional 11 <br />inches below the grate. Attached are photos taken on November <br />4,11,17, & 25 and December 2 & 9 showing the inlet structure <br />until the lake froze and then January 29 during the last visit. <br />At this time we estimate the lake level had dropped by 20 to 25 <br />