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,~ ~lannin~ <br />services, inc. <br />.~ <br />May 29, 1998 <br />Christina L. Kamnikar, Environmental Protection Specialist <br />Division of Minerals & Geology <br />Department of Natural Resources <br />1313 Sherman St., Room 215 <br />Denver, CO 80203 <br />Re: 112 Permit Application #M-98-014 for the Gypsum Ranch Pit <br />Dear Christina, <br />RECEIVED <br />'JUN O1 1996 <br />Division of Minerals 8 Geology <br />I am writing in response to your technical adequacy review letter of May 18, 1998 on the above <br />referenced project. I will respond to your comments in the same order in which you presented <br />them. <br />1) In the Special Use Application information presented to Eagle County, [he applicant <br />indicated that two seed mixes would be used in the reclamation for the project. For the <br />mined pit bottom, an agricultural seed mix of forbs and grasses will be used. For the side <br />slopes of the pit, a native seed mix dominated by native plants, but also including some <br />agricultural species, has been proposed. The components of both of these seed mixtures <br />are given in the attached Exhibit A. <br />The applicant does commit to seeding any topsoil stockpiles left in place for longer than <br />one growing season, and will use one of the seed mixes contained in Exhibit A. <br />2) ~ A revised copy of Exhibit D, Mining Plan is attached to this letter containing the <br />statement requested. <br />3) The project engineer, High Country Engineering of Glenwood Springs, has completed the <br />calculations necessary to determine the proper channel sizes in each phase. As you will <br />notice from this attached information, the drainage channels will become a permanent <br />feature of the site, with the reclaimed version being slightly smaller in size than the ones <br />in use during the mining operations. <br />4) The geotechnical stability study provided in Exhibit S of the initial permit application <br />was prepazed by Hepworth-Pawlak Geotechnical of Glenwood Springs. H-P has <br />provided additional information per your concerns which indicates that there should be no <br />~ iiiiiiiiiiiiiiiiiii <br />box 947 -eagle, co 81631 - 970.328.6299 -fax 970.328.6254' <br />