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<br /> <br />o <br />(:::> <br />N <br />0) <br />,>,- <br />o <br /> <br />Table 4.--Potential sediment yiebis from surfaoe-mined areas in the Yampa River basin <br />for three estimated levels of ooal produotion by 1990 <br /> <br />1975-80: <br />Area mined------------------------------- <br />Area partly reclaimed-------------------- <br />Sediment yield from surface-mined and <br />partly reclaimed areas----------------- <br /> <br />N <br />\0 <br /> <br />1980-85: <br />Area mined---------------------.--------- <br />Area partly reclaimed-------------------- <br />Sediment yield from surface-mined and <br />partly reclaimed areas----------------- <br /> <br />1985-90: <br />Area m i n.ed--------~---------------------- <br />Area partly reclaimed--------------~----- <br />Sediment yield from surface-mined and <br />partly reclaimed areas----------------- <br /> <br />Slow-growth <br />projection1 <br /> <br />Rapid-growth <br />projection1 <br /> <br />Moderate-growth <br />proj ect i on 1 <br /> <br />Square <br />mi les2 <br /> <br />Tons <br />per year3 <br /> <br />Tons <br />per year' <br /> <br />Square <br />mi les2 <br /> <br />Tons <br />per year3 <br /> <br />Square <br />miles2 <br /> <br />2.0 <br />o <br /> <br />3.4 <br />o <br /> <br />2.9 <br />o <br /> <br />4,500 <br /> <br />6,700 <br /> <br />7,800 <br /> <br />2.6 <br />2.0 <br /> <br />4.9 <br />2.9 <br /> <br />7.3 <br />3.4 <br /> <br />8,100 <br /> <br />15,000 <br /> <br />21,000 <br /> <br />3.1 <br />2.6 <br /> <br />6.0 <br />4.9 <br /> <br />9.4 <br />7.3 <br /> <br />10,000 <br /> <br />19,000 <br /> <br />30,000 <br /> <br />Iprojected coal production from Steele, Bauer, Wentz, and Warner (1978, table 4). <br />2Assuming 50 acres of land are mined to produce 1 million tons of coal. <br />3Sediment yields have been adjusted to reflect a basin of 40 square miles. <br />