2021-10-08_REVISION - M1987026 - Laserfiche WebLink

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to be a primary control structure under the 112c permit, and therefore should not be considered part of the permitted/affected land. The Phase I affected area will comprise about 25 acres, and will fully encompass the existing 110 permit. It is not known how many acres Phase II may include, since it has not been defined, and it is not currently being proposed for any mining activity under this conversion. Rule 6.4.4(f) -The obsidian deposit is an intact, massive structure, and it is not sedimentary. It is lithologically distinct from the rhyolite which is the common rock surrounding the site. There is no observable fracture system in this deposit which would cause instability, incompetence, or contribute to groundwater movement. It is not known how deep the obsidian deposit is that is being mined, nor exactly what material lies beneath it. Preliminary drilling confirmed that it is at least 100 feet thick, and dry, but drilling did not encounter the bottom of the deposit. Likewise, past mining did not reach the bottom and future miming is not expected to reach the bottom of it. Since much of the country rock in immediately surrounding areas is rhyolite,there is a chance that it, too, occurs under the obsidian. Rule 6.4.4(i)—Blasting and geotechnical stability. Roads to be used for this 112c operation: The access road leading to the site already exists and requires no significant improvements; it is not included in the 112c permitted area. Onsite roads to be used for the 112c operation either currently exist or will be constructed by blading and surfaced as needed. Some roadways will be very short term and little used, and will likely consist of overland trails that can be monitored for deterioration and easily reclaimed by ripping and seeding. These are already shown on the Exhibit C Maps. They will only serve onsite hauling and earthmoving, and should not need to be wider than 15 feet, plus drainage ditch. The operator owns much of the surface of the 112c area, and may opt for retaining an as-yet undetermined portion of these onsite roads for future non-mining use. Fuel stored onsite, location and quantity: 4000 gallon portable diesel containment. 100 gallon hydraulic, 100 gallon motor oil, 100 gallon cone oil stored in totes in enclosed trailer. All fuel, lubricants, and other fluids that are stored onsite will be in secure storage locations, away from site disturbance, and provided with a sufficient volume of secondary containment, meeting any necessary SPCC requirements. Some fuels etc. may be stored offsite and delivered to the site as needed. Adjoining/overlapping permitted area:The "Lucky VI Quarry" (Permit M-2016-015) is a 110 permit located along the southeast boundary of this proposed 112c permit. The 110 consists of a portion of the Buffalo Hunter patented lode claim and a portion of the Sharp patented lode claim. As this permit conversion boundary is proposed, there is an overlap of approximately 3.17 acres of the Lucky VI Quarry and this Black Obsidian Pit. The area of overlap includes only the permitted land within the Sharp lode; the Sharp lode claim is owned by Colorado Quarries Inc. Nearly all the mining, processing and stockpiling in the Lucky VI Quarry permit is carried out on the Buffalo Hunter lode claim, which is outside the proposed 112c boundary of the Black Obsidian Pit. Colorado Quarries has discussed with the operator of the Lucky VI a plan to transfer the 3.17 acres of permitted land on the Sharp lode to the Black Obsidian. This would begin to take place with a request for release, to be submitted by the operator of the Lucky VI Quarry. We expect that, upon issuance of the converted 112c permit,the release request would be immediately approved. Presently, no release paperwork has been prepared to be submitted, and the Black Obsidian 112c conversion maps will include this 3.17-acre area. Please see the enclosed maps detailing this area of overlap, under Exhibit C