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DRMS Comment Text(from DRMS letter AR Round 2) OSMI Responses <br /> Comment# <br /> Plugging and abandonment of monitoring wells was not sufficiently discussed within the reclamation plan.Please Wells will be P&A'd using guidance from the State Engineers Office(SEO)and will be similar to what was done for <br /> 25 describe the methods to be employed and ensure the requirements of Rule 5 are sufficiently addressed.The GW-4 in TR-12.A description of well abandonment has been added to the Section 3.3 of the Reclamation Plan in <br /> methods described in Exhibit E should also be accounted for in Exhibit L. Exhibit E.The cost to abandon 7 GW monitoring wells was provided in Task la of Exhibit L. <br /> Sec 9,page E-13 states,one annual weed survey will be conducted immediately following snowmelt.This is not Page E-13 of Exhibit E has been updated to include a bi-annual weed survey of noxious weeds.Please see Updated <br /> sufficient.Plants germinate at different times,several surveys and/or treatments should be made throughout the Exhibit E for details. <br /> 26 growing season in order to effectively manage potential noxious weed populations on site.Please propose a more <br /> robust noxious weed monitoring and management plan. <br /> Section 3.3 lists buildings to be removed and generally states they have foundations.Please commit to removing OSMI commits to removing building foundations by either burying them 3 feet deep or breaking up the <br /> 27 the foundations of demolished buildings or utilizing in place capping at a depth of no less than three feet below foundations and using the crushed concrete to backfill portal areas.Section 3.3 of the Reclamation Plan was <br /> reclamation grade. updated to reflect this practice. <br /> Map C-3,TSF Cross Sections,is presented in Exhibit C,it is more applicable to the Reclamation Plan Maps,please Map C-3 has been duplicated and included as Map F-3 in Exhibit F.See updated Exhibit F for details. <br /> 28 duplicate Map C-3 in Exhibit F. <br /> Neither Map F-1 and F-2 contain topo lines depicting the final reclamation topography.Pursuant to Rule 6.4.6(a) Topographic lines have been added to Map F-1 and F-2.See updated Exhibit F in Attachment 1. <br /> 29 the reclamation plan map must show the proposed topography of the area with contour lines of sufficient detail <br /> to portray the direction and rate of slope of all reclaimed lands <br /> 30 Updated map F-1 and map F-la to correspond with approvals from Ouray County (CO for Admin Building)see response to comment#18. <br /> regarding which buildings are to remain post reclamation. <br /> Surrounding the treatment ponds are currently rock with a split rail fence, map F-1 depicts no fence and The treatment ponds will remain post-reclamation to treat mine water from the Revenue mine. The rock will <br /> 31 revegetation.Will the fence and rock be removed upon final reclamation?If so please update the reclamation remain in place as is.The fence is an aesthetic feature that will remain post-reclamation.It has been added to <br /> plan narrative to support map F-1 as currently depicted. OR revise map F-1 to include these features post-Map F-1. <br /> reclamation. <br /> In order to completely address the requirements of Rule 6.4.7(2)(d)for the Atlas TSF,please incorporate the more The information provided in PAR response#61 was added to Section 3.2 of Exhibit G.Please see Exhibit G for <br /> 32 in depth PAR table response#61 into the narrative portion of Section 2.3 of Exhibit G. details. <br /> Two maps labeled G-1 were provided under Exhibit G.Please rename one of the maps to differentiate between The two figures DRMS is referring to are labeled Map G-1 and Figure G-1.Map G-1 is a map showing the mine <br /> the two.And update references to the maps within the narrative portion of Exhibit G. area surface hydrology.Figure G-1 is a schematic showing the water balance for the mine.They are labeled as <br /> 33 such in the Table of Contents of Exhibit G and referenced appropriately throughout relevant exhibits.There does <br /> not seem to be a need to revise Exhibit G perthis comment. <br /> Section 2.2 of Exhibit G references new proposed groundwater monitoring wells downgradient of the Mill Facility We are working with our current Receiver to decide whether to install the 2 down gradient monitoring wells this <br /> to be constructed in the summer of 2022. Please clarify if Summer of 2022 is still an appropriate estimate for season or wait until next spring.We understand the mill cannot be certified until the wells are installed and <br /> 34 completion.Also please see additional comments in Exhibit U. sampled.Section 2.2 of Exhibit G has been updated to state that down gradient wells will be installed prior to mill <br /> certification(either by late fall 2022 or spring of 2023).See updated Exhibit G in Attachment 1. <br /> The wetlands on Map G-1,Mine Area Surface Hydrology,are slightly different from maps F-1,C-1a(between TSF).The wetland delineation shown on Map G-1 has been updated with the most current wetland delineation.See <br /> 35 Please revise Map G-1 accordingly. updated Exhibit G in Attachment 1. <br /> The Division agrees that the areas of influence identified on Map G-2 are appropriate though smaller than the two The following sentences were added to Section 2 of Exhibit G. <br /> miles as required under Rule 6.4.21.However please provide a narrative describing the justification for the smaller "As noted in Rule 6.4.21,the operator is required to identify groundwater and surface water within 2 miles of the <br /> 36 area. permit boundary.The area of influence noted on Map G-2 is less than 2 miles due to geographic features that <br /> control both surface water and groundwater.Rather,the area of influence identified on Map G-2 is bound by a <br /> ridge line to the south and west,Sneffels Creek to the north and Canyon Creek and Imogene Creek to the east of <br /> the permit areas." <br /> Please revise Map G-2a to depict the permit area pursuant to Rule 6.2.1. The permit boundary has been added to Map G-2a.See updated Exhibit G in Attachment 1. <br /> 37 <br /> Amendment 02 AR Responses Round 2 <br /> M-2012-032 <br /> 4of8 <br />