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Epvi0r&pn) et)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 /> June 17, 2019 <br /> Mr. Jared Ebert <br /> Division of Reclamation, Mining & Safety RECIEFIVED <br /> 1313 Sherman St., Suite 215 <br /> Denver, CO 80203 ,JUN i <br /> Dear Mr. Ebert; DIVISION OF RECLAMATION <br /> MINING AND SAFETY <br /> Cal <br /> RE: Albert Frei and Sons, Inc. - AFS-Bennett Pit L(� ,,✓�ypS Sl,��/'�( �z� <br /> M-2001-038 - Adequacy Response 01 <br /> On behalf of my client Albert Frei and Sons, Inc, I am responding to your adequacy review <br /> letter dated April 12, 2019. I have included your review points that need to be addressed in the <br /> order presented so the questions and answers will be in this document for easy reference. <br /> Rule 6.4.4, Exhibit D—Mining Plan <br /> 1. Page 6 of the mining plan indicates groundwater elevation under the southern part of the mine is <br /> approximately 5394 feet. Based on the Exhibit C Existing Conditions Map, the southern end of <br /> the permit area has a ground elevation ranging from 5350 feet to 5325 feet. Please clarify the <br /> depth of groundwater and the two foot maximum depth of excavation? <br /> That is a typo on my part it should have read 5294. I have corrected the elevations noted on <br /> page 6 and provided a copy for the file. <br /> 2. Page 6 of the mining plan indicates the top of the shale on the north side of the property may be <br /> higher than 5394 feet. According to the Exhibit C, Existing Conditions Map, the ground elevation <br /> on the north side of the permit boundary is 5340 feet. Please clarify the depth of the shale layer on <br /> the north side of the permit area? <br /> Again it was a typo and should have been 5294. The underlaying shale slopes to the south and <br /> west from a highpoint of 5315 to 5298 towards the mid part of the mine. This means it varies <br /> from 15 to 40 feet below the existing surface elevation in that area. <br /> 3. Page 6 of the mining plan indicates all stormwater will be collected on the site and treated before <br /> being released if it contacts the disturbed area. Please describe how the water will be treated? If <br /> storm water collection basins will be used or another type of impoundment, please depict these <br /> features on the Exhibit C-1 Mining Plan Map. <br />