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C-1981-019 <br /> Class: Inspectic <br /> Starting in 1975, two years before mining began, Colorado State University <br /> four years of extensive vegetation studies at Colowyo to determine methods <br /> reclaiming the mined lands. <br /> -'� &£ter the spoil material has been regraded, topsoil is distributed onto th <br /> �= with dozers. <br /> Figure 6 <br />