Laserfiche WebLink
RECEIVED <br />Response to Technical Adequacy Letter by Item r30 <br />Durango Field Office <br />Division of Reclamation, <br />Mining and S fety <br />The following summarizes each item brought forward by the DRMS in their initial review o <br />the Amendment application (AM-01) to the Ruby Trust permit (M-1979-181) (copy provided <br />in ATTACHMENT A). The following is formatted to describe the location of the issue item by <br />page and paragraph within the June 28 letter, a summary of the issue item as stated by <br />DRMS, followed by a response provided by Grayling LLC and the Mount Sneffels Mining <br />Company. <br />1. Cover Page, Second Paragraph "Exhibit C-Mining Plan (Rule 6.3.3)":..."the plan should <br />include better description of where (the waste rock) will be placed on the surface, and <br />the quantities that the waste dump areas can accept". <br />RESPONSE: The proposed plan was amended to provide TWO Figures depicting the <br />Ruby Trust Mine Plan (Exhibit E, Map E.1) and the Ruby Trust Reclamation Plan (Exhibit <br />E, Map E.2). As shown in Map E.1, there are three areas usable for waste rock materials <br />management. The volume of waste rock that can be managed by each area assuming a <br />maximum slope of 3:1 is summarized within this Figure. As part of this amendment <br />application, the 'Road and Bridge Department' for Ouray County was contacted in order <br />to secure a documented agreement for waste rock transfer to the County (with NO <br />economic return to the Mount Sneffels Mining Company) for use by the County to <br />amend roads, install storm-water features and help abate ongoing avalanche scour. A <br />copy of this documented agreement is provided in ATTACHMENT B. <br />As per correspondence with the County, they are capable of taking all of the produced <br />waste rock. There are contingencies to this agreement based upon the character of the <br />waste rock (refer to ATTACHMENT B). The Mount Sneffels Mining Company is <br />responsible for the determination that the material is safe to the environment and will <br />therefore continue the sampling and analysis of material to assure that it is inert (does <br />not leach metals) and does not generate acid. Since the County is capable of taking as <br />much material as the mine can provide, the amount of storage space on-site should be <br />more than adequate to manage materials produced, managed and ultimately <br />transported to the County. The quantities the three dump areas can accommodate <br />equate to 453 cubic yards. Based upon a conservative assumption of the mine <br />producing approximately 14 cubic yards of waste rock per day, these combined storage M <br />areas would provide over 30 days of storage capacity. This is more than enough time <br />a