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cinderblock or metal panel stoppings. MSHA approved ventilation and dust control <br />• plans were followed at both mines. <br />0 <br />• <br />As of December 31, 1986, the total clean reserves within the permit boundary <br />of the Roadside North and South Portals follows: <br />LEASE <br />C-078049 <br />C-01538 <br />C-024998 <br />C-029889 <br />C-020740 <br />Roadside South Private <br />Roadside North Private <br />Total <br />CLEAN COAL IN PLACE (TONS)' <br />29,000 <br />13,371,000 <br />9,926,000 <br />10,417,000 <br />240,000 <br />100,000 <br />2,400,000 <br />36,483,000 <br />'As of December 31, 1986. <br />Lease boundaries and lease numbers are indicated on Exhibit 4, Tab Section 3. <br />Previous reserve calculations and report (General Mining Order No. 1) are <br />provided in Appendix 12-1. Room and pillar mining typically recovers 40 to 50 <br />percent of the in-place reserves. A coal seam isopach for the Cameo "B" seam is <br />shown in Exhibits 31 and 42, Tab Section 6. A map of the overburden depth for the <br />affected area is provided in Exhibits 32 and 45, Tab Section 6. <br />Volume 3 Tab 12 12.2 5/00 <br />