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

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Page 3 of 5 5) There appears to be an inconsistency as to what sediment control structures will be constructed alongside the railroad spur line. The Map 21 plan view appears to show berms in place but the cross - section B -B' shows that ditches will be next to the railroad track. However, on Map 16 and Figure 13 (Map 13 ?), there appear to be ditches on both sides for only part of the spur line. Please explain or revise the maps so that there is consistency among these maps. The Division has no further concerns. In the August 19, 2011 submittal cover letter, CAM explained that the sediment control along the spur line and a portion of the railroad loop varies due to Union Pacific construction standards for cut sections versus fill sections and, also, for the protection of the wetlands. Additional sediment control symbols were added to Maps 16 and 21 for clarity. 6) Please add more detail to the discussion of pond reclamation,in Section 2.05.3(4)(a)(ii)(D) and, as was done for the topic of road reclamation, please add a reference in Section 2.05.4(2)(c) on page 2.05 -30 that a general discussion of the reclamation of the sediment ponds is presented in Section 2.05.3(4)(a)(ii)(D). In the August 19, 2011 submittal, CAM added additional information on pages 2.05- 20, 21 and 31. However, the Division requests an expanded discussion concerning pond reclamation, including where the fill will come from since the ponds will be incised, compaction of the fill material and whether or not topsoil will be applied. 7) There are two short purple line segments shown along the railroad loop on Figure 13 (Map 13 ?), Map 16 and Map 21, one between track locations 53 +00 and 64 +00 and one between track locations 106 +00 and 110 +00. Please explain and add their designations to the map legends or remove these lines. The Division has no further concerns. In the August 19, 2011 submittal, CAM explained that the purple lines represent ditches. Maps 16 and 21 were modified to show ditch symbols. 8) Please update Section 2.05.6(b)(i) on permit text page 2.05 -54 to reflect that there are three ponds and one SAE in the current sediment control plan. The Division has no further concerns. Page 2.05 -54 was revised accordingly in the submittal dated August 19, 2011. 9) Please change 20% slope to 0.2% slope for ditch 1 -d in the Ditch and Culvert Design Summary on page Exh. 9 -2. The Division has no further concerns. The summary on page Exh. 9 -2 was revised appropriately in the submittal dated August 19, 2011. 10) Please change "V-Ditch" to "Trapezoidal" and 0.5% slope to 8.0% slope for ditch segment 3 -c in the Ditch and Culvert Design Summary on page Exh. 9 -2.