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. EXHIBIT C - PREMINING AND MINING PLAN MAPS OF AFFECTED LANDS ~_. ~_ , _ _ .: _..w Exhibit C-l, Surface Ownership (with its index), illustrates surface ownership for the property controlled by Rio Grande and for the property within 200 feet ofthe Rio Grande boundary. Exhibit C-2, Premining and Mining Plan Map, illustrates the following: • Existing topography and names and locations of creeks, roads, railroads, and buildings. • The location of the proposed road and railroad spur to access the plant site. • The proposed plant site and fill area (for relocating excess excavated construction soils). • The property and resource boundaries • The proposed surface mine area and production sequence. • The location of the proposed bridge to be constructed over the St. Charles River. • The proposed permit boundary. • Telephone lines • Power lines • Fiber optic lines • Stock fences • Mainline railroad • Access roads • Stock ponds • Stock tanks • The total area within the proposed permit boundary is approximately 2,500 acres. The disturbed land within this boundary totals approximately 1,061 acres, as summarized below: Surface Mine (50 years) 898 acres Plant (inc. Fill Area) 125 acres Railroad Spur 8 acres Access Road 10 acres Borrow Area 20 acres TOTAL 1,061 acres Based on current market conditions and process technology, the life of mine presently planned is 50 years; however, exploration data indicate that the resource could potentially yield up to 100 years of limestone reserves suitable for cement feedstock. Given the economic importance of the Fort Hays limestone deposit and quantity of material available, Rio Grande expects to extend the life of mining and processing beyond 50 years. Therefore, the mine plan prepared for this project incorporates the necessary flexibility to accommodate future technological advances with respect to both mining and cement production. • 1180-Mine Permi[Exhibits (JuL03.02)FINAL.doc (`_] July 3, 2002