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INSPECTION OF EXCESS SPOIL FILL <br />First Quarter 2007 Certification <br />Fill Area No. 7 <br />Date: March 30.2007 <br />GENERAL DESCRIPTION OR REFERENCE TO SITE PLAN: <br />The CTL Thompson report dated April 27, 2001, "Stability Analysis and Geo-technical Recommendations <br />Lorencito Surface Mine Phase P' addresses the generel requirements as also cited in Secticros 4.09.1 to <br />4.09.2 of the Colorado Mined Land Reclamation Board for Coal Mining. <br />ACCIVITY DURING INSPECTION: <br />Removal of Topsoil and Organic Matter <br />Placement of Under rains <br />[ostallation of Sur&ce Drainage System <br />Construction of Fill <br />Placement of Topsoil <br />_Seeding <br />X Other Facility idle <br />SEDIMENT CONTROL <br />Sediment pond construgion has been completed in accordance with plans submitted to and approved by the <br />DMG and asconstrrreted survey/drawings certified by Registered Land Surveyor and Registered <br />Professional Engineer. All sur6ce runoff from the fill area is directed to this sect®ent control facility <br />(mown as Pond 7. No discharge occurred during the quarter. <br />SURFACE DRAINAGE <br />Armored Ditches line the east and west boundary of the fill area. Lateral ditches on the fill face direct <br />runoff to these side ditches. A fouAh east west ditch was constructed at the upper most extent of the fill, <br />connecting to both armored ditches on the east and west perimeters. No erosional problems were noted at <br />Ure intersections of the hdeml ditches and the armored ditches. Slopes have become well vegetated and no <br />erosional problems were noted. <br />SITE PREPARATION <br />As indicated in previous inspection reports, organic materials such as brush and trees were removed from <br />the proposed fill area followed by topsoil removal prior to fill placement Desigp criteria did not require <br />keyway cWS for steeper valleys with minimal soil cover (fill #7). No evidence of springs or seeps was <br />observed during site preparation <br />DRAINAGE SYSTEM (UNDERDRAINS) Dram sins are specified by CDMG regulations for fills which <br />can be classified as Valley Fills. Fill area #7 is not a valley fill. CTL Thompson recommended a miu®um <br />6' x 12' triangular section (area = 64 SF) for this size fiR As indicated by previous inspection reports, as <br />constructed drainages generally wee more trapezoidal with a top width of 12', bott~n width of 8', and <br />average height of 8' (area = 80 SF). Sandstone recovered from durable "channel" sandstone deposits <br />encormtered during the mining process was used in drain constnaxioa MirnS 160 fabric was used is Geu of <br />filter material. <br />