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Ms. Richardson <br /> Page 2 <br /> January 12,2015 <br /> 6.4.2 Exhibit B—Index Map <br /> No comment. <br /> 6.4.3 Exhibit C—Pre-mining and Mining Plan Map(s)of Affected Lands <br /> 2. The `Introduction' section of the submittal states the purpose of submitting the Amendment <br /> Application was to correct a small error in the permit boundary. Please describe the error in <br /> the permit boundary and explain how it was corrected. The Applicant should note that <br /> removing any portion of the mine site from within the currently approved permit boundary <br /> requires a separate permitting action. <br /> 3. The map labeled `C-2: 2010 Conditions' depicts water at the bottom of the quarry. Please <br /> specify if the pit currently contains water and identify the source of this water, e.g. <br /> groundwater or surface runoff. Also,demonstrate the operation is in compliance with all <br /> applicable Colorado water laws and regulations governing injury to existing water rights. <br /> Exposure of groundwater requires, at a minimum, a well permit and substitute water supply <br /> plan. Stormwater that is captured by the pit must infiltrate into the ground or be released to <br /> the stream system within 72 hours. Otherwise, the Operator is responsible for replacement of <br /> evaporative depletions. <br /> 4. The map labeled `C-2: 2010 Conditions' depicts several buildings immediately to the west of <br /> the processing area located at the southwest corner of the site. Are these structures associated <br /> with the quarry operation? <br /> 5. The map labeled `C-4: Cross Sections' states the vegetation islands will be planted with <br /> rangeland shrubs. However, the seed mix provided as part of the Reclamation Plan does not <br /> include shrub species. Please clarify if shrubs will be planted on the vegetation islands. If <br /> shrubs are to be planted, then specify the species and seeding or transplant rate. If shrubs will <br /> not be planted on the vegetation islands, then revise the Reclamation Plan Map accordingly. <br /> 6. The map labeled `C-4: Cross Sections,Detail B - Eastern Slope Information' states that <br /> drilling and blasting will create benches on the eastern slope. However,the Mining Plan <br /> states a continuous slope of 65°would be excavated on the east side. Please clarify if the <br /> final grade will be one continuous slope or if the final grade will be achieved through <br /> benching and revise the map or Mining Plan accordingly. <br /> 6.4.4 Exhibit D—Mining Plan <br /> 7. The Applicant has stated the permit boundary will be marked. Please note that Rule <br /> 3.1.12(2)(b)requires the Operator to delineate the boundary of the affected area, which <br /> would be 210 acres of the total 271.61 acres permitted at the Ralston Quarry. <br />