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2019 Plan of Operations Modification American Gypsum Company, LLC <br /> Table 6.4 summarizes mining type by ton and estimated surface disturbance. For quantity <br /> estimates, Tierra Group assumed 1% of the total mining would be performed using drilling and <br /> blasting. <br /> TABLE 6.4: MINING METHOD SUMMARY <br /> EstimatedType or Mining Method Quantity of Material Area of <br /> Removed • Disturbance <br /> Upper Pit—Roto-Milling i'i 15.0 11.58 <br /> Upper Pit—Drilling/Blasting I'i 1.7 0.12 <br /> East Pit—Roto-Milling 29.6 81.76 <br /> East Pit—Drilling/Blasting 3.3 0.83 <br /> TOTAL 49.6 94.29 <br /> Notes: I']Upper Pit material summaries and acreages do not include mining the Upper Pit to the <br /> approved permit boundary, assumed to correlate with a pit floor elevation of 6900 feet amsl. <br /> If needed during the proposed mining activities, American Gypsum would contract a specialized <br /> contractor to perform drilling and blasting. Any necessary approvals would be obtained, and <br /> notifications made. <br /> 6.10.2 Underground Operations <br /> No underground operations are anticipated for the Upper Pit and East Pit (and associated <br /> appurtenances). <br /> 6.11 Use and Occupancy <br /> The proposed disturbance area would be used and occupied in a similar manner as the existing <br /> Mine, including all relevant permits. This includes items such as mining pits and access roads. <br /> There are no proposed changes to the Mine entrance or associated fences, gates, or signs.There <br /> are also no new structures (such as buildings) or enclosures associated with the proposed <br /> Modification. Drawing 15 shows a map of existing facilities at the Mine Office and staging area <br /> (see Table 1.4 for previous approvals). Table 6.2 contains a list of all equipment currently used at <br /> the Mine and proposed for continued use as a part of this Modification, including locations where <br /> equipment is left at the end of shift. <br /> A 4-foot high wire fence has been installed north of the Upper Pit to prevent accidental access <br /> from BLM trails located north of the Mine and proposed East Pit area. Signs have been installed <br /> to alert recreationists to the potential hazard ahead. <br /> The original Notice of Occupancy was submitted to the BLM on 03 October 1996. The updated <br /> Notice of Occupancy and site claim map was submitted to the BLM on 03 August 2016. The site <br /> claim map is included on Drawing 03; the list of applicable claims is shown in Table 1.5. A receipt <br /> for 2019 mining claim fees is provided in Appendix B. American Gypsum would maintain all right, <br /> title, and interest in and to each of the claims included as part of this Plan of Operations. <br /> American Gypsum's use of public lands involves the continued use of roads and the maintenance <br /> of gates, fences, and signs. In accordance with 43 CFR § 3715, Table 6.5 documents structures <br /> Am Gypsum Poo Mod ISSD 20190909 September 2019 [301 <br />