1978-10-11_REPORT - M1977378 - Laserfiche WebLink

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TECHNICAL REVISIONS The following items are revisions of the original permit application for regular operations submitted by Standard Metals Corporation on October 1, 1977: (1) Seed Species Change Grass seed species listed in the permit application Reclamation Plan (Exhibit E) are those combined in one of two mixes, Alpine Mix or Mountain Mix. See Appendix 2 for species common names. In order to achieve a higher rate of success in the revegetation program species other than those listed in Exhibit E have been incorporated into the program. The seeding rate for these species will be 30 lbs per acre. A technical revision to include these species in the Reclamation Plan is thus submitted to the Mined Land Reclamation Board. (A list of the species to be added to the present species list follows.) By inclu- sion of these grass species, the total cost of reclaiming affected lands as projected in the Reclamation Plan will not be altered. (2) Fertilizers Initial fertilization of lands having major disturbance was to be carried out applying 200 lbs per acre of commercial grade Ammonium Phosphate 16-20-0 as mentioned in the Reclamation Plan submitted. In order to attain higher and more diverse nutrient application, a different custom blended fertilizer 20-20-9 is now being used. A technical revision to include this fertilizer with similar applica- tion rates (200 lbs per acre) is submitted to the Mined Land Recla- mation office. The cost per pound of this fertilizer ($0.10/lb) is comparable to that of the Ammonium Phosphate grade previously used, thus no additional cost will be incurred in the Reclamation Plan. (3) Additional Affected Acreage In its application for a regular operation mining permit, Standard Metals Corporation listed 140 acres as the total acreage to be affected by mining and milling operations. During the current year, 1978, an additional 3.2 acres of land having moderate to minor disturbance has been affected. The newly affected lands are divided between two loca- tions, 1.2 acres at the American Tunnel portal area, and 2.0 acres at the Terry Tunnel portal area. Geographic location of these areas can be obtained by referring to Map 5 showing the American Tunnel portal area and Map 6 , the Terry Tunnel portal area. The additional acreage affected at the American Tunnel portal is a result of excavating approximately three feet of topsoil from a surface area covering 1.2 acres. The excavated material was used for construc- tion of a series of three settling ponds at this site. The settling ponds were constructed to reduce the concentrations of suspended -8-