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STATE OF COLORADO <br />DIVISION OF RECLAMATION, MINING AND SAFETY <br />Department of Natural Resources <br />1313 Sherman St., Room 215 <br />Colorado 80203 <br />Denver C O L O R A D O <br />, <br />Phone: (303) 866-3567 DIVISION o e <br />RECLAMATION <br />FAX: (303) 832A706 MINING <br /> - &- <br />January 22, 2007 SAFETY <br /> <br />Steve Brown Bill Owens <br /> Governor <br />Lafazge North America Russell George <br />10170 Church Ranch Way, Ste. 200 Executive Director <br />Westminster, Colorado 80021 Ronald W. Cattany <br /> Division Director <br /> Natural Resource Trustee <br />Re: Adequacy Review of Permit Amendment (AMl) M & G Pit (M-1986-079) <br />Steve, <br />After review of the amendment submittals and after our 1/18/2007 phone conversation <br />regazding the M & G Pit, the Division is seeking clarification on some issues. I would <br />appreciate it if you could please respond to the following questions prior to the 4/12/2007 <br />decision due date so that this office has time to review your responses. <br />1. Please clarify the purpose of the proposed stormwater detention pond. Is it to be <br />used for stormwater runoff from the M & G Pit and/or the Dunes subdivision? <br />Will the detention pond remain after reclamation is complete? Where does the <br />detention pond dischazge to? Has or will the Operator apply for a stormwater <br />discharge permit for this detention pond? <br />2. Please provide a design for the stormwater pond, including the proposed elevation <br />of the bottom of the stormwater detention pond, and of the dischazge pipe? <br />3. What is the elevation of the historic ground water level? How was this number <br />derived? <br />4. Is the stormwater detention pond expected to hold water for more then 72 hours at <br />a time? If so the Operator may be required to obtain a Substitute Supply Plan <br />from the State Engineers Office. <br />5. Is there currently or aze there any plans to get a stormwater discharge or point <br />source discharge permit for the reclamation work at the M & G Pit? It appears <br />that you will be discharging to the Howe Pit; will the Howe Pit CDPS permit need <br />to be amended to handle the additional dischazge from the M & G Pit? <br />6. Please describe the system for dischazging water off of the site and pumping fill <br />material on to the site during the reclamation phase. <br />7. There is some confusion on the amount of remaining permitted acreage. Based on <br />the two DMG letters dated 2/26/2006 you forwarded it appeazs that the current <br />permit acreage is 78.78 acres, is this correct? <br />Office of Office of <br />Mined Land Reclamation Active and Inactive Mines <br />