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<br /> <br />NPDES PERMIT CO-0027154 <br />COLORADO YAMPA COAL COMPANY <br />MINES 1, 2, 3 and ECKMAN PARK <br />DISCHARGE <br />POINT I.D. <br />~ 001 <br />002 <br />' 003 <br />004 <br />005 <br />006 <br />007 <br />008 <br />014 <br />LOCATION <br />Eckman Park, Pond A <br />Mine 1, Pond T <br />Mine 1, Pond B <br />Mine 1, Pond C <br />Mine 1, Pond D <br />Mine 1, Pond E <br />Mine 1, Pond F <br />Mine 1, Pond G <br />Mine 3, Pond E <br />10-YR., 24-HR. <br />RUNOFF VOLUME <br />52.3 ac-f t. <br />3.4 ac-ft. <br />0.86 ac-f t. <br />1.1 ac-f t. <br />-13.9 ac-ft.- <br />1.9 ac-f t. <br />0.60 ac-f t. <br />20.3 ac-f t. <br />1.52 ac-ft. <br />AS-BUILT RUNOFF <br />STORAGE VOLUME <br />73.6 ac-ft. <br />3.4 ac-ft. <br />3.9 ac-f t. <br />1.1 ac-f t. <br />51.0 ac-f t. <br />1.9 ac-f t. <br />1.21 ac-ft. <br />20.3 ac-f t. <br />1.52 ac-f t. <br />CERTIFICATION <br />DATE <br />07/14/81 <br />07/15/81 <br />03/24/82 - ~ ~ ~r "' <br />r <br />07/14/81 <br />07/14/81 <br />07/15/81 <br />10/27/82 <br />07/14/81 <br />05/31/83 j <br />FOOTNOTES: 1: 10-year, 24-hour precipitation event: 1.8 inches <br />2: Gauge station for monitoring precipitation: Main Mine Weather Station <br />