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2011-03-04_PERMIT FILE - M2011007 (4)
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2011-03-04_PERMIT FILE - M2011007 (4)
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Last modified
8/24/2016 4:31:29 PM
Creation date
3/10/2011 7:24:45 AM
Metadata
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Template:
DRMS Permit Index
Permit No
M2011007
IBM Index Class Name
PERMIT FILE
Doc Date
3/4/2011
Doc Name
Response to March 1 Adequacy Review
From
Venture Resources, Inc.
To
DRMS
Email Name
DB2
Media Type
D
Archive
No
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As stated in the Mining Plan Exhibit C - 6.3.3(1)(b) and considering the nature of poor topsoil conditions at this site <br />(0-2" Mammoth-Ohman-Bendemeere Complex soil and virtually no accumulation of true A horizon topsoil, as <br />previously described in Exhibit B) it will be challenging to salvage any significant quantities for future reclamation <br />uses. Additionally, over 20% of the impoundment area is currently covered with existing waste rock. Venture <br />Resources is going to do our best in salvaging any native, Mammoth-Ohman-Bendemeere Complex soil (also any A, <br />AB, and Bw horizon soil) for reclamation. Blending of these different soils is also permitted. It will be very likely <br />that topsoil will need to be imported and Venture Resources commits to do this, as required. <br />Before applying the newly placed topsoil, a pH treatment utilizing hydrated lime shall be broadcast on any areas <br />previously impacted by the removed waste rock. The lime shall be broadcast at a rate of 50 pounds per 1,000 square <br />feet of such impacted area. Once broadcasted, a light spray of water shall be applied over the same. This will <br />sufficiently neutralize any trace, potentially acid forming material left behind. <br />Reclaimed or imported topsoil shall be applied over the underlying area now exposed by the removal of the mine <br />waste for a depth of 6 inches. NRCS states that the available water holding capacity of this soil is approximately <br />0.06-0.07 inches/inch (i.e. 6 inches of soil can store approximately 0.4 inch of water). During the growing season in <br />this vicinity there will be about 7 inches of precipitation. NRCS states that most commercially available grass <br />species require 10 to 14 inches of precipitation. Inorder to improve the soil's water holding capacity, organic matter <br />will need to be added and to the soil. The NRCS strongly recommends the application of certified weed free straw <br />(applied at 2 tons per acre) covered with bio-degradable netting or application of wood cellulose hydro mulch with a <br />long-lived tackifier. Temporary erosion control measures shall be implemented around this area during this activity <br />(ie silt fence, straw bales, see SWMP). <br />6.3.4(1)(c)(ii) <br />Seeding will occur to coincide with the appropriate time of year for proper germination, whether it is closer to spring <br />or fall season. <br />Previously seeded areas will be examined the following growing season to evaluate the success of the revegetation <br />efforts. Re-seeding shall be done if this previous seeding failed or is insufficient. <br />Because of the short project time duration and relatively small surface area to be reclaimed, there will be an <br />opportunity to measure the success of this re-vegetation plan and provide for a chance to modify the method with <br />soil amendments and/or fertilizers on a as needed basis. A technical revision will be sought if this is necessary. <br />6.3.4(1)(c)(iii) <br />A grass seed mix and application schedule has been developed specifically for this site through consultation with the <br />Natural Resource Conservation Service (see NRCS seed mix specification attached as an appendix to this Exhibit <br />D): <br />Redondo Arizona Fescue 1.8 PLS pounds/acre <br />Red Fescue 1.0 PLS pounds/acre <br />Canbar Canby Bluegrass 1.0 PLS pounds/acre <br />Critana Thickspike Wheatgrass 3.3 PLS pounds/acre <br />Rosana Western Wheatgrass 6.4 PLS pounds/acre <br />Covar Sheep Fescue 1.2 PLS pounds/acre <br />This will be sowed together with fertilization and irrigation (if determined necessary) until permanent vegetation is <br />re-established. <br />6.14(1)(c)(iv) <br />The grass seed mixture described above in 6.3.4(1)(c)(iii) shall be broadcast at a rate of 15 pounds of pure live seed <br />per acre. Once the seed is broadcast, the seedbed shall be adequately raked to provide for seed placement. <br />Previously seeded areas will be examined the following growing season to evaluate the success of the revegetation <br />efforts. Re-seeding shall be done if this previous seeding failed or is insufficient. <br />Page 3 of 5
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