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to' <br />min. <br />Top of Dam <br />30-1 <br />3' <br />$r <br />Postmining Surface <br />5' <br />Note: This example shows the EP1 stock tank, although the <br />Impoundment contours are are meant to depict the approximate <br />size and shape needed to achieve a 2.0 acre -foot capacity. <br />be curved or bent to tie to postmine surface. <br />7 will vary depending on topography <br />�ie'fc'h\ <br />-5' 0 25' 50 <br />Pond Plan View <br />Scale: 1 " =50' <br />Contour Interval = 1' <br />Excavated <br />5' 0 5' 10 <br />Pond Profile View <br />Scale: 1 " =10' <br />1) Stock tank design <br />This design is provided for future stock tank design. <br />In general, the stock tanks will have the following characteristics: <br />Combination excavation and minimal embankment type dugout construction. <br />Less than 3 acre -feet in volume, typically less than two acre -feet. <br />Source of runoff is surface runoff from topsoil and revegetated areas. <br />Maximum 3H :1V slopes on side slopes. <br />Topsoiled and vegetated. <br />Top of structure width at least 10 feet. <br />Embankments will typically be less than 13 feet high from the bottom of the pond <br />2) Open channel spillway <br />Minimum width will be 8 feet, typically 12 -15 feet in width. <br />Grass lined spillway minimum, riprap may be specified for particular structures. <br />3) Inspections <br />An as -built summary table will be submitted upon completion of construction, and these structures will <br />be inspected annually by an engineer or by a qualified professional specialist under the direction of <br />a professional engineer. A Professional Engineer with certify a report following the inspection. <br />Professional Engineer Certification <br />I Thomas C. Peterson, being a registered Professional Engineer in the state of Colorado, do hereby <br />certify that the above parameters have been reviewed by me and are correct to the best of my <br />knowledge and information. <br />`,``��11111111II� j Figure 2.05 -6 <br />Stock Tank Plan /i <br />�O �PQ • L I CF ii�G Tvpical Desh <br />As <br />THOMAS C. PETERSON �• ••• . �J' W_ oa E <br />DRWG, BY: <br />P.E. No. 32257 _� t o o•; C c °o,wxr Y <br />• N 32257 Z • \�"e.. �wti i,a� i� DRWG NO <br />Date% j � •i L l Z • ` Colo ryo Coal Company <br />,a <br />• • \\�/ ``� 06 UPDATED LOGO <br />�✓,,'''' TONAL •�- ``�`����` <br />Page 28 411111111 <br />TONY <br />