2006-06-13_REVISION - M2004009 - Laserfiche WebLink

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Page 5 21. The total area to be seeded and fertilized on the site is 148 acres. This number has also been updated in Exhibit E and reflected in the reclamation costs (Exhibit L). 22. The haul road is currently in place and operable. It is approximately 30 ft in width and is slightly elevated and compacted. Exhibit E now states that the haul road will be reclaimed by ripping, grading, topsoiling with 0.5 ft of overburden, and revegetating the area. This is all shown on both the revised Mine Plan Maps and the Reclamation Plan Maps. A smaller access road will be constructed for access to the oil wells, also shown on the Reclamation Plan Maps. 6.4.6 EXHIBIT F -Reclamation Ptan Maa 23. The map has been changed to show the correct reclaimed slope as 3H:1V. 6.4.6 EXHIBIT G -Water Information 24. The substitute water supply plan (SWSP) for this entire operation (including the amendment area) is currently under final approval from the State Engineer's Office. As represented in the SWSP and the enclosed, revised Exhibit G, the only water use will be water lost with mined product, 0.1 acre-foodmonth for dust control, and evaporative losses from groundwater exposed in the dewatering and rechazge trenches. As stated in this letter, with the elimination of the concrete batch plant from this amendment, there will be no washing of gravel at this site or botching of concrete. 25. Dust control water will be diverted from water pumped from the dewatering trenches. Exhibit G has been edited [o include this information and is enclosed 26. The currently shown 100-year floodplain as mapped by FEMA is shown on the enclosed, revised Exhibit C-2, Sheets 1-2, as requested. The 100-year flooding event would likely fill the excavated pits during the event and would dissipate through the topographically lower elevation. Prior to any increased disturbance to this site, meaning the increased mining proposed by this amendment, a floodplain permit will have to be obtained from Weld County in which flooding will have to be accounted for in upstream and downstream effects on Boulder Creek. 27. A complete search of all State Engineer's well records and a thorough search on the ground and with aerial photography have shown that no alluvial wells exist within 600 ft of the limits of mining. Impacts to Boulder Creek are addressed and compensated for by the SWSP. No other significant surface bodies of water exist that would be negatively impacted by the operation of dry mining, other than the slight potential for impacts to the Plumb and Dailey irrigation ditch as described in Response 13 and addressed in the enclosed, revised Exhibit E, Attachment E-1, and Exhibit F, Sheet 4. 28. We have neazly completed mining in Cell 1 of the site, as approved in the original permit, and no negative effects have been noted [o any Cottonwood trees. As described in Response'27, there are no alluvial wells anywhere neaz (<600 ftJ the limits of mining. 6.4.9 EXHIBIT I -Soils Information 29. The soil units were mapped and shown o Turnpike application in 2004. This map nothing had changed from 2004 to 2005. backfill and as the soil cover for revegetation n the Pre-Mining Plan Map for the original was not submitted for this amendment, as All overburden on the site will be used as 6.4.12 EXHIBIT L -Reclamation Costs 30. The low-water crossing will be removed as part of final reclamation. The cost of removal is now shown in the revised Exhibit L, which is enclosed.