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<br />If this assumption is incorrect, please specify how highwall reduction will be performed. If <br />this assumption is correct, the Division highly recommends that CDOT adequately mark the <br />permit boundary and the buffer zone boundary with separate distinctive markers to prevent <br />equipment operators from straying beyond the approved extraction area. <br />2. If hazardous materials are to be stored on site, please indicate how the materials will be <br />stored and adequately contained in the event of a spill. Materials to be considered include: <br />fuel, oil, hydraulic fluid, antifreeze, asphalt, batteries, etc. Also, include the hazardous <br />materials storage area location on the mine plan map. <br />The permit indicates that an asphalt batch plant will be used on site. Please indicate how <br />the reject "uncured" asphalt will be handled to prevent contamination of water resources. <br />Exhibit E <br />The map currently labelled Exhibit E and F should actually be labelled Exhibit C. The map <br />should then be revised to indicate the direction of mining, the proposed location for the 30 <br />foot buffer zone, the proposed location of the hazardous materials containment area and the <br />proposed location of the topsoil stockpiles. When revised, the map will need to be signed <br />by the professional surveyor as required by Rule 6.2.1. The map should also be stamped <br />with the surveyors seal. <br />2. A second map should be submitted for Exhibit F that indicates the proposed cost-mining <br />contours. This map must be signed and sealed as indicated above. <br />3. Please indicate CDOT's proposed time of seeding of regraded areas. <br />4. Please commit to seeding of topsoil stockpiles that will be in place for one season or more. <br />The seed for this application must be a perennial seed, but is not required to be as diverse <br />as the post mining seed mix. If CDOT proposes to use a different seed for the topsoil <br />stockpiles, the seed or seed mix must be indicated in the permit. <br />5. Please indicate if the culverts in the access road will be removed at reclamation. It not, <br />please indicate there function relative to the post-mine land use. <br />6. The Natural Resource Conservation Service recommended fencing of the revegetated areas <br />for the first two years of establishment to prevent damage to the reclaimed areas by <br />overgrazing from deer and elk. Please indicate if CDOT will follow this recommendation. If <br />not, please indicate how CDOT wi{I deal with that potential problem. <br />If you have questions or need additional information, please contact me at our Durango Field Office, <br />1474 Main Avenue, Room 207, Durango, Colorado 81301 ,phone no. (970) 247-5062. <br />Sincerely, <br />~~' <br />Steve S. Shuey v <br />Environmental Protection Specialist <br />