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Acreage of disturbance - Abandoned Canon National Mine Subsidence <br />Sci Ft <br />haul area - loader shuttle routes 300 <br />1,200 <br />200 <br />500 <br />1,000 <br />roadway access 7,380 <br />Subtotal - access + shuttle routes: <br />Acres <br />10,580 0.24 <br />Surface area of subsidence holes (6 holes) <br />1 south most 910 <br />2 south 573 <br />3 largest, east 1,353 <br />4 NW 720 <br />5 NE 575 <br />6 NE small 240 <br />Subtotal - subsidence holes 4,371 0.10 <br />Spoils pile footprint (used for backfill) 3,870 0.09 <br />Contingency factor ( +10 %) 1,882 <br />Total area of disturbance: 20,703 0.48 <br />Round up - Acres: 0.5 <br />