Laserfiche WebLink
<br />-2- <br />As currently calculated the proposed post-mining topography of the Revision <br />No. 1 Area will be reduced on the order of 20'-30' from the currently approved <br />plan: This reduction may be attributed to three things, according to Mr. <br />Smaldone: <br />1: The "Powder-River Basin Effort". In this area of Wyoming, about 80' of <br />coal is removed creating a Swale area during reclamation due to <br />insufficient overburden material to fill the void. With the removal of <br />22' of coal at the Chimney Rock Coal Mine, this "Powder River Basin <br />Effect" is "evident". <br />2. Since 1984, with the addition of Bechtel Operating Services as operator <br />of the site, dozers were used to compact recently dumped material: <br />Prior to Bechtel and 1984, the dump trucks would dump material over the <br />side into the excavated areas of East Pit with no compaction from the <br />dozers. This compaction of overburden material by dozers has <br />contributed to this AOC concern. <br />3: The 33.6 percent swell factor may be inaccurate. <br />recalculations of the swell factor resulted in a <br />percent to 33.6 percent, this amount may need to <br />further. However, since no activities are occur <br />operator is unable to perform the necessary work <br />swell factor. <br />Even though the <br />reduction from 39.7 <br />be reduced even <br />ring at the site, the <br />to determine a new <br />The reduction of the post-mining topography by 20'-30' correlates to a total <br />deficit of 800,000 cubic yards of material. Mr. Smaldone specified that he <br />has material balance calculations depicting where this 800,000 cubic yards of <br />material is in relation to the entire site. <br />Before a final decision is made by the Division on how to proceed with this <br />problem, Kaiser will submit by October 15, 1986 the survey maps as required by <br />Stipulation No. 10. This map will be for years 1985 and 1986 since the last <br />map submitted was for 1984. This map will be supported by cross-sections to <br />depict areas reclaimed since 1984 and areas needing final reclamation. The <br />Division will review this submitted material and direct Kaiser Steel as to the <br />magnitude of the problem and corrective actions. <br />As a follow-up to this meeting, Mr. Smaldone telephoned today (October 3rd) to <br />state that Kaiser was planning on flying the site to perform an aerial <br />survey. It will take approximately 3-4 weeks before this is done and an <br />aerial survey map submitted to the Division. Kaiser will still submit the <br />above specified information by October 15, 1986 and follow-up with the aerial <br />survey when available. <br />cc; Mike Savage <br />Tom Gillis <br />srs <br />4233E <br />