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Exhibit D-Mine Plan Amendment IN <br /> • Constructing the base of operations (See Figure D-3); <br /> • Installing fuel storage (with secondary containment) areas at the base of operations, and <br /> the May Day No. 1 and No. 2 benches; <br /> • Locating portable toilets at the base of operation, May Day No. 1 and May Day No. 2; <br /> • Establishing three equipment and ore stockpile staging areas 12 (See Figure D-4); <br /> • Establishing access road truck turnouts; <br /> • Upgrading the La Plata River Bridge with a final load bearing capacity of 50 tons; <br /> • Removing surface debris for offsite disposal; <br /> • Recycling scrap metal; <br /> • Salvaging the historic mill equipment located on the May Day No. 1 mine bench and the <br /> equipment within the Idaho Storage building; <br /> • Conducting underground exploration using grab sample and core drilling techniques; ; <br /> • Mining and transporting May Day No. 1 ore; <br /> • Performing routine equipment and mine maintenance activities at the base of operations;; <br /> • Installing and maintaining : <br /> o entrance gate, <br /> o fences (the property boundary parallel to La Plata River); <br /> o visual and sound barriers; and <br /> o signs (entrance and speed limit signs); <br /> • Maintaining Best Management Practices (BMPs) structures,and road surfaces and <br /> grades; and <br /> • Establishing and maintaining site security. <br /> The total affected mine area within the permit area is approximately 56 acres (Figure D-1) and <br /> includes the following: <br /> • Base of Operations include the access road to the La Plata River Bridge is 6.4 acres; <br /> • May Day No. 1 Portal and Bench-6.5 acres; <br /> •. May Day East-1.7 acres; <br /> • May Day No. 2 Portal and Bench-5.5 acres; <br /> • May Day 2 East-0.5 acres; <br /> • Idaho Affected Area-13.5 acres; <br /> • Chief Portal and Manway-0.5 acres; <br /> • May Day No. 3 Affected Area 8.3 acres; <br /> • Access Roads— 12.8 acres <br /> 1 Base of operation ore stockpiles will temporarily store up to 1,000 cubic yards(CY)(See Figure D-6) <br /> Z May Day No. 1 and May Day No.2 ore pads will temporarily store approximately 100 and 300 cubic yards.(CY) <br /> respectively(See Figure 8 and 9). <br /> 112(d)Permit <br /> May Day and Idaho Mine and Mill Application <br /> M-1981-185 <br /> Revised-03.08.2017 <br /> Exhibit D—Rule 6.4.4 Page 2 of 13 <br />