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REV91929
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Last modified
8/25/2016 3:13:25 AM
Creation date
11/21/2007 11:16:12 PM
Metadata
Fields
Template:
DRMS Permit Index
Permit No
M1984041
IBM Index Class Name
Revision
Doc Date
1/26/1990
Doc Name
APPLICATION FOR AMENDMENT OF 112 PN M-84-041 EXHIBIT E-RECLAMATION PLAN
Type & Sequence
AM2
Media Type
D
Archive
No
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<br />~i <br />Amendment of M-84-041 Exhibit E page 3 <br />III RECLAMATION PRODEDURES FOLLOWING MINING ON THE NEW SITE <br />The main mined surface areas will not be reclaimed until those <br />surfaces have been lowered to the bottom of the ore body. This <br />final mined surface will be nearly flat with a slight grade <br />(approximately 0.58) to the south. The surface will be reclaimed <br />by placing the topsoil-overburden which has been retained in <br />stockpile in areas (E) and (F), or which is being stripped ahead <br />of the active mine surface, on the mined out surface and seeding <br />it for revegetation. Seeding will be done in late fall or early <br />spring. It is estimated that the topsoil-overburden placed on the <br />mined surface will be 6 to 12 inches thick. <br />Area (I) will be used to process and stockpile gypsum rock. The <br />topsoil-overburden removed from it in mine preparation work will <br />be stockpiled on the extreme northeast edge of the area. <br />Reclamation of area (I) will be accomplished by regrading any <br />fines and/or waste material stockpiles to a smooth rolling surface <br />with slopes of not greater than 3:1, covering the surface with <br />material from the topsoil-overburden stockpile to a thickness of 6 <br />to 12 inches and seeding. <br />After all waste rock has been stockpiled on area (E), the final <br />southern slope surface will be graded to a smooth rolling surface <br />with an average slope of 3:1. Topsoil- overburden, from <br />stockpiles, will be placed on the surface 6 to 12 inches thick and <br />the area will be seeded. <br />IV RECLAMATION OF EXISTING MINE AREA BEING PHASED OUT <br />Reclamation of the existing mine areas (G} and (H) will be <br />accomplished as these areas are phased out of production and <br />inactive areas become available for reclamation. Much of the <br />mined, operation and stockpile areas are relatively flat and will <br />be prepared for reclamation by contouring the surfaces to smooth <br />junction with natural slopes. In the course of mining on the <br />natural 2:1 to 1.75:1 slopes, several small areas of "highwall" <br />have been developed. These will be reclaimed by benching and <br />filling to create final slopes of 0.5:1 to 1.75:1. Seeding for <br />revegetation will be attempted on slopes flatter than 1.5:1. <br />Natural rock slopes of 0.5:1 to 1:1, 10 up to 20 feet high may be <br />commonly observed in the area. Attempts will be made to simulate <br />natural steep slope configurations in the reclamation of <br />highwalls. Portions of the tops of rock highwalls may be laid back <br />to irregular 1:1 slopes with heights up to 20 feet. At the time <br />of reclamation, the perimeters of inactive stockpiles of minus 3/8 <br />inch "fines" material will be graded to slopes of 2:1 and the flat <br />top areas will be graded for positive drainage. In the course of <br />mining and operating on areas (G) and (H), overburden-topsoil <br />stockpiles were created and reserved for use in reclamation. <br />Material from these stockpiles will be placed on the graded <br />surface, 6 to 12 inches thick and revegetated. <br />JEROME F. GAMBA & ASSOC. <br />CONSULTING ENGINEERS <br />
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