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<br />INSPECTION OF EXCESS SPOIL FILL <br />~~ Second Quarter 2002 Certification <br />lJ y Fill rea No. 7 <br />Date: . a 7 2002 . <br />GENERAL DESCRIPTION OR REFERENCE TO SITE PLAN: <br />The CTL Thompson report dated April 27, 2001, "Stability Analysis and Geotechnical Recommendations <br />Loreneito Surface Mine Phase I" addresses the general requirements as also cited in Sections 4.09.1 to <br />4.09.2 of the Colorado Mined Land Reclamation Board for Coal Mining. <br />ACTIVITY DURING INSPECTION: <br />Removal of Topsoil and Organic Matter <br />Placement of Underdrains <br />Installation of Surface Drainage System <br />/Construction of Fill <br />_Placement of Topsoil <br />-Seeding <br />~c~ (v~-ru cdl+- cti-~ Gkr.~ ~~~ vw'lnl <br />fG~Xri-~y/~Y/ , <br />SEDIMENT CONTROL <br />Sediment pond construction has been completed in accordance with plans submitted to and approved by <br />the DMG and as-constructed survey/drawings certified by Registered Land Surveyor and Registered <br />Professional Enginee~rl. All surface run-off from the fill azeas is directed [o t/hi~s spediment control facility~y/~,~ <br />~~/.o~'~~.L~J-`uI?~f ~G`Q'~ .~iGd~Ln-' ~`r'~~~l~`°~L`"e~`1',~'at'~ ~%~~/ .." /~~~e <br />/ Jiro / c~ Ge> ~~ 9~2zi>~~.~ v ,/L/9 /~/ <br />SITE PREPARATION <br />Organic materials such as brush and trees were removed from the proposed fill area followed by topsoil <br />removal. Design criteria did not require keyway cuts for steeper valleys with minimal soil cover (fill #7). <br />~i~D .~UY~dLGr~-~/ ^~/ J df ° / e`elli Gee--~o ~jpZt'~ ~Gr Gbu~ <br />/~~iJ~^u/ 2~ (( ! <br />No evidence of springs or seeps was observed during site preparation. <br />DRAINAGE SYSTEM (UNDERDRAINS) <br />Drain sizes are specified by CDMG regulations for fills which can be classified as Valley Fills. Fill azea # i <br />is not a valley fill. CTL Thompson recommended a minimum 6' x 12' triangular section(area = 64 SF) for <br />this size fill. As constructed drainages generally were more trapezoidal with a top width of 12', bottom <br />width of 8', and average height of 8' (area = 80 SF). Sandstone recovered from durable "channel" <br />sandstone deposits encountered during the mining process were used in drain construction. Mirafi 160 <br />fabric was used in lieu of filter material. <br />