Laserfiche WebLink
i <br />INSPECTION OF EXCESS SPOIL FILL r~i7 °~ `~ <br />Fi1lArea#9 ~^~~~~".,,~~-i~~~~' <br />Third Quarter 2002 Certification <br />September 30, 2002 <br />The CTL Thompson report dated April 27, 2001, "Stability Analysis and Geotechnical Recommendations <br />Lorencito 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 />ACTIVITIES NOTED DURING INSPECTION <br />Out-slopes have been seeded and mulched. Mulch was crimped-in using a D-8 Dozer. A combination of <br />the approved seed mix and an alternate seed mix requested by the surface owner was broadcast seeded at <br />approximately 40 lbs-PLS/Acre. A certified weed-free barley straw mulch was placed at 3000 lbs./Acre. <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 Engineer. All surface run-off from the fill areas is directed to this sediment control facility. <br />SITE PREPARATION AND CONDITION <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 #9). <br />No evidence of springs or seeps was observed during site preparation. <br />DRAINAGE SYSTEM (UNDERDRAINS) <br />Underdrain construction was completed in advance of fill placement. <br />FILL PLACEMENT <br />CDMG regulations require that spoil be "placed in horizontal lifrs in a controlled manner, concurrently <br />compacted as necessary to ensure mass stability". Maximum lift thicknesses are no[ specified. Lifts were <br />placed in accordance with plans specified by the CTL Thompson report. <br />No additional spoil material was placed during the quarter. <br />COVER MATERIAL <br />Final fill configuration has been obtained and cover material placed during previous quarters. <br />