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<br />COLOWYO COAL COMPANY L.P. <br />Small Depressions/Stock Ponds <br />Summary of As-Built Structures <br />December 3, 1999 <br /> <br />POND <br />LOCATION <br />STORAGEVOI:. <br />ac ft SPILLWAY <br />BOTTOM <br />WIDTH ft <br />EMBANKMENT <br />WIDTH ft <br />EMBANKMENT <br />HEIGHT ft <br />POND <br />SIDESLOPES <br />SPILLWAY <br />DEPTH ft <br />YEAR <br />CONSTRUCTED <br />A E.Pit 1989 Area 0.041 9 16 0.3 <3.11:1 1 JULY, 1997 <br />B E.Pit 1986 Area 0.068 10 16 0 <3.09:1 2 JULY, 1997 <br />C E. Pit 1988 Area 0.06 10 20 0.2 <3.2:1 2 JULY, 1997 <br />D E.Pit 1986 Area 0.067 9 16 0.5 <3.0:1 2 JULY, 1997 <br />E E.Pit 1995 Area 0.072 13 16 0 <3.5:1 4.5 JULY, 1997 <br />F E.Pit 1994 Area 0.036 12 13 0.7 <4.0:1 2.5 JULY, 1997 <br />G S. 16 - 1994 Area 0.3 14 15 0 <3,5:1 3 NOVEMBER, 1997 <br />H S. 16 -1994 Area 0.38 14 17 1.5 <3.5:1 4 JULY, 1998 <br />I S. 16 -1994 Area 0.022 15 14 1.0 <3.2:1 1.5 JULY, 1998 <br />J S. 16 -1995 Area 0.47 16 16 2.0 <3.0:1 1.5 JULY, 1998 <br />K S. 16 -1995 Area 1.02 13 15 <3.0 <4.0:1 3 OCT, 1999 <br />L E.Pit 1995 Area 0.31 9 12 0 <3.0:1 2 OCT, 1999 <br />M E.Pit 1995 Area 0.29 10 10 0 <3.0:1 1.5 OCT 1999 <br />FOOTNOTES: <br />`) Embankment height is measured from original ground elevation (inside slope of embankment) to bottom of spillway. <br />SIGNED: DATE: ~ -3 ~9`/ <br />BRIAN KEITH BRIGGS <br />B a7 3 7+~A <br />.0 ~ o <br />~~~~~~aiuaL E""r <br />P.E. No. 31956 <br />