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Bob Oswald <br />Re: Carnation Mine, Permit M-1977-416 <br />Request for Technical Revision <br />Page 3 of 4 <br />Historical Facilities and Vent Shafts: Historical mine facilities, consisting of a portal and <br />loadout structure and small waste dump, are located near the north end of the Permit The old <br />portal has been permanently closed. There are no vent shafts or other remote facilities associated <br />with this Permit, although there is a pre-Law 24" vent hole a few hundred feet west of the old <br />Carnation portal. <br />Dump Grading: Much of the Carnation Mine site has been previously reclaimed. Runoff <br />control structures have been constructed, and much of the site is revegetated. In November of <br />2002, the Operator removed the ore loadout wall north of the mine portal, as the loadout was <br />failing and unstable. The entire area near the loadout has been regraded to blend into the <br />surrounding topography (see enclosed 1" = 100' site map). <br />The surface of the southwest dump was re-seeded, with moderate success, by a previous <br />operator. The final reclamation map to be submitted by this Operator will include regrading of <br />this dump. Outslopes of dumps will be graded to a slope of no steeper than 2 Horizontal : 1 <br />Vertical to provide a suitable face for reclamation and to blend the reclaimed dump into existing <br />site contours. The general practice will be to reduce all "created slopes" to a gradient of not <br />more than 2:1. However, as a practical consideration there will be occasions when reduction of <br />slopes will not be performed if the required grading will create greater disturbance and <br />potentially cause site erosion. As stated, the normal practice will be to reduce all slopes, but <br />possible exceptions might include benches or road cuts that have already revegetated or <br />stabilized or which can only be graded by cutting new access, provided however that the existing <br />face is stable and not eroding. <br />Access Roads: Road reclamation at the Carnation site will be limited. The main access <br />road into the mine site is also the primary access road up the northeast-facing slope of the large <br />ridge forming one side of Big Gypsum Valley. This road provides access into lands used for <br />other purposes locally. This primary road will not be closed as part of the Carnation Mine final <br />reclamation. Local roads within the mine yard will be scarified and seeded in conjunction with <br />reseeding elsewhere on the mine site. Upon completion of grading and scarifying, disturbed <br />azeas will be seeded by broadcast seeding, followed by light harrowing or dragging to embed <br />seeds. <br />One culvert exists immediately west of the Permit; this culvert is under the access road to the St. <br />Jude Mine. This culvert will be left in place during final reclamation to provide necessary <br />drainage control. <br />Reclamation Seed Mix: Adjoining mine sites in the local area have differing reclamation <br />seed mixes in the original permit reclamation plans. The Operator proposes to "standardize" the <br />seed mix to be used in the area of the Sunday group of mines. The proposed seed mix is derived <br />from the existing mixes in the permits held by the Operator and from recent experience with the <br />proposed general mixture. The following seed mix is proposed: <br />Western Wheatgrass: 6 lbs/acre PLS <br />Crested Wheatgrass: 6 Ibs/acre PLS <br />Indian Ricegrass: 3 lbs/acre PLS <br />Yellow Sweet Clover: 1 lb/acre PLS <br />