2011-08-24_APPLICATION CORRESPONDENCE - C2010088 (2)

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Page 2 of 5 In submittals dated April 11, 2011, July 8, 2011 and August 19, 2011, the surface water control plan has been modified three times from the original August 25, 2010 submittal plan. The Division had additional questions from the July 8, 2011 submittal and the following is the status of those additional questions: 1) Please provide revised permit text, maps and hydrology designs that take into account that the borrow area, borrow area topsoil stockpile and pond 4 will be deleted from the Fruita Loadout plan, that there will be three sediment ponds and that sediment control for the portion of the railroad loop adjacent to the deleted borrow area will not involve a sediment pond. In the August 19, 2011 submittal, CAM revised the permit text. However, please also revise the water depletion estimate in Section 2.04.11 on pages 2.04 -37 and 38 to include only the three proposed sediment ponds. 2) In the July 8, 2011 submittal, a new topsoil stockpile, topsoil pile #3, was added along the railroad spur line. Since this topsoil stockpile does not drain to a sediment pond, the stockpile needs to be designed as a small area exemption (SAE). Please provide the appropriate hydrology designs for the topsoil stockpile SAE, describe the topsoil stockpile SAE in the appropriate permit text sections and add the SAE designation to the appropriate maps. The Division has no further concerns. In the submittal dated August 19, 2011, CAM provided a Sedcad design for small area exemption no. 1. The revised pages are Exh. 9 -82, 83 and 84. 3) It appears that Figure 13 should be re- labeled as Map 13. The Division has no further concerns. In the August 19, 2011 submittal, Figure 13 was changed to Map 13. 4) In the submittal dated April 12, 2011, the plan view drawings on Map 13 for ponds 1 and 2 were small and difficult to read. However, in the July 11, 2011 submittal, the plan view drawings on Figure 13 (Map 13 ?) are too small to read. Please submit new plan view drawings of each sediment pond, at a scale that is large enough to easily read the contour lines, contour intervals and elevations. Section 2.05.3(4)(a)(ii)(B) on permit pages 2.05 -19 and 2.05 -20 contains a description for the construction of pond embankments with discharge structures. However, referring to Map 13, revised in the August 19, 2011 submittal, it appears that ponds 1, 2 and 3 are completely incised, with no constructed embankment and no discharge structures. If all three ponds are completely incised with only pumped discharge, please revise Section 2.05.3(4)(a)(ii)(B) to describe the construction of the three incised ponds.