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DRMS Comment Text(from DRMS letter AR Round 2) OSMI Responses Comment# Section 4.9 of Exhibit D states that Ouray Silver Mines, Inc. (OSMI) is in process of obtaining a Road Use OSMI has been in contact with the USFS.They are working on the road use agreement but admitted that the 11 Agreement with the USFS for Road 869.3A.Once the agreement has been obtained please provide the Division process can be lengthy and likely won't happen until next summer.OSMI commits to providing a copy of the USFS with a copy. road use agreement to DRMS once it is received. Within the Mining Plan(Exhibit D)please clarify that a new building,the superstructure over the Tailings Section 3.10 and 4 of Exhibit D have been updated to provide information regarding the proposed tailings thickener,is also being proposed under this amendment.Briefly provide a description of the building, thickener super structure.Copies of the building designs were provided in Attachment 6 to OSMI's PAR responses 12 footers/foundations,dimensions,building materials,etc.and any other improvements to the existing structure dated May 26,2022 and also are provided in Attachment 3 to these responses. necessary for construction.Additional questions regarding final reclamation and demolition of the tailings thickener superstructure are also included in Exhibit L. 13 On Table D-3 please include a quantity column or otherwise specify how many tanks of each type are contained in A third column has been added to Table D-3 as suggested with the number of tanks of each type contained in the the mill. mill listed.Please see updated Exhibit D in Attachment 1. Under section 4.12 (page D-22) please briefly describe all water diversion and impoundments for the entire Section 4.12 of Exhibit D has been updated to include a brief description of water diversions and impoundments at 14 Revenue site, pursuant to Rule 6.4.4.(c). A more detailed description can be referenced under Appendix 2 the Revenue site.Exhibit U and the Stormwater Management Plan contains more detailed descriptions of these (SWMP). facilities.Please see updated Exhibits D and U in Attachment 1 and the updated SWMP in Appendix 2,which may be found in Attachment 2. Other exhibits mention a proposed SW Pond#2,however it is not explicitly proposed under Exhibit D,Section A description of stormwater conveyances and sediment control ponds was added to Section 4.12 of Exhibit D. 4.12.Please provide information detailing the pond's location,size,time of construction,etc.Please note that this Exhibit U also was updated to include more detailed descriptions of these features.A design for the proposed 15 pond will be considered an (Environmental Protection Facility) EPF and need to be designed and certified in Sediment Pond#2 is provided in Updated Appendix 2,which may be found in Attachment 2. The location and accordance with Rules 6.4.21(10)and 7.3.1(3).Please update all applicable exhibits,maps and figures to reflect general size of the pond is shown on relevant exhibits and is discussed in Exhibit U as an EPF. this change. Given the extreme location and weather of this site the Permittee may wish to be considered an intermittent OSMI appreciates DRMS's comment,however,the operation plan for the Revenue Mine does not meet the extra operation as defined by C.R.S.34-32-103(3)(6)(a)(II).If this is the case the applicant should include in this exhibit a requirements of an intermittent operation.Although we do experience extreme weather,we do not anticipate comment statement that conforms to the provisions of Section 34-32-103(6)(a)(II),C.R.S. 180 days of such conditions once the mine resumes operations. As required by Rule 6.4.5(2)(a),Table E-1 does not clearly state the amount of affected land associated with each Table E-1 was updated to include two new columns.One that lists the post reclamation use(i.e.,commercial or of the post-mine land use (wildlife or commercial) and the various reclamation treatments, waste rock or wildlife habitat)and the second one identifies the reclamation treatments to be used at each area.See Updated 16 revegetation being performed at each area.Please revise Table E-1 to define the number of acres that will receive Exhibit E in Attachment 1 for details. various reclamation treatments(#of acres revegetated,#of acres capped with waste rock) by location.This information will be used to ensure an accurate Reclamation Cost Estimate. Similarly,under section 4,the acreages and volumes of areas to receive various reclamation treatments(topsoil Table E-3 has been updated to reflect the amount of topsoil to be placed on each of the areas requiring topsoil and waste rock)are unclear. and what amount is imported and what amount is available on site. Table E-3 also has been updated to include a a. Based on the narrative provided on page E-9 the Division is unclear as to how much total topsoil is summary of waste rock treatment for each of the areas receiving waste rock. See updated Exhibit E in required for reclamation vs.how much additional topsoil will need to be imported to complete reclamation.Is the Attachment 1 for details. total amount of topsoil to be applied 4,747 cy or 6,247 cy(1,500 onsite+4,474 imported)?If the larger amount, where will the additional 1,500 cy be applied(not accounted for on table E-3)? b. Table E-3 is titled'topsoil import requirements'.The table lists out all areas requiring topsoil.This tab 17 should be renamed"topsoil requirements" c. Please revise table E-3 or create a new table to list out the volumes,depths and acreage for each area to receive waste rock treatments. d. Please ensure that all tables depicting acreages and volumes of areas receiving various reclamation treatments are consistent throughout Exhibit E and Exhibit L. Amendment 02 AR Responses Round 2 M-2012-032 2of8