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operates at this site to the 5650' elevation. In the event that mining continues below 5650' that <br />interrupts the current storm water flow path, new detention ponds will be located at appropriate lower <br />elevation. <br />Please refer to the Storm Water Management Plan Map describing the diversion of the upland <br />watershed to the north of the mining ground onto affected land owned by the mine operator, <br />specifically for the purpose of handling storm water flows, attached to this application with Exhibit G <br />Water Information. The storm water map shows the locations of four other detention ponds and <br />storm ditches which convey and retain storm flows to achieve a zero discharge at the Tunnel Drive <br />location. The storm water plan has been reviewed and approved by a licensed structural engineer. <br />Included with this application package are engineered and stamped drawings showing the <br />construction techniques for the sediment ponds, ditches, and spillways utilized therein. Also attached <br />with Exhibit G is a recent watershed study conducted to assure that current storm water controls are <br />accurate to address the amended acreage and increased life of the mine. <br />(d) the size of area(s) to be worked at any one time. <br />4 <br />Phase One mining will result in approximately 35 acres of highwall development and 45 acres of pit <br />floor disturbance. At total build out, up to 65 acres of highwall development and up to 90 acres of pit <br />floor disturbance is estimated. <br />(e) An approximate timetable to describe the mining operation. The timetable is for the purpose of <br />establishing the relationship between mining and reclamation during the different phases of a mining <br />operation. An Operator /Applicant shall not be required to meet specific dates for initiation, or completion <br />of mining in a phase as may be identified in the timetable. This does not exempt an Operator /Applicant <br />from complying with the performance standards of Section 3.1. If the operation is intended to be an <br />intermittent operation as defined in Section 34- 32.5- 103(11)(b), C.R.S., the Applicant should include in <br />this exhibit a statement that conforms to the provisions of Section 34- 32.5- 103(11)(b), C.R.S. Such <br />timetable should include: <br />(i) an estimate of the periods of time which will be required for the various stages or phases of the <br />operation; <br />(ii) a description of the size and location of each area to be worked during each phase; and <br />(iii) outlining the sequence in which each stage or phase of the operation will be carried out. <br />(Timetables need not be separate and distinct from the mining plan, but may be incorporated <br />therein.) <br />The life of mine of this deposit is approximately seventy (70) years. Due to the highwall mining <br />technique employed, the mining zone, including stockpile areas, will stay basically in the same area <br />through the life of the mine. While this will keep the mining area in a defined zone with some <br />movement of the working face to the northern and western portions of the mining affected lands, <br />reclamation of the lower reaches of the mining site will not occur until near the end of the life of <br />mine. Reclamation of the highwall areas as described in the 1997 submittal and resubmitted with this <br />application will reflect the stormwater drainage and highwall configurations as planned and will be <br />performed as the granite rock highwall producing face is worked back to the affected land boundaries <br />to the west. At the time of location of lower storm water detention ponds, a technical revision will be <br />tendered to the Division for review and approval. This may not occur for 20 — 30 years from present. <br />