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Please update Figure 4.2-2 accordingly and add GW-9 to the approved water <br />monitoring plan in permit Section 4.2.4. Please ensure that all appropriate <br />text and tables of the approved water monitoring plan are updated as <br />needed. <br />57. There is no PHC analysis provided regarding the new sediment pond. <br />Please add a discussion of the pond drainage and sediment pond discharge to <br />the PHC analysis in Appendix N. Given the close proximity of the proposed <br />pond to East Salt Creek, please include an assessment of the need for <br />installation of a protective clay liner in the pond, and include such design <br />modification as appropriate. <br />58. The proposed sediment pond will be located within 100 feet of a stream with a <br />drainage area of greater than 1 square mile (East Salt Creek). As such, the <br />provisions of Rule 4.05.18 (Stream Buffer Zones) apply. <br />Please provide narrative demonstrating how the requirements of 4.05.18(a) <br />and (b) will be achieved. Include plans for installation and maintenance of <br />silt fencing or other appropriate interim measures to provide sediment <br />control for disturbances located within 100 feet of East Salt Creek. Such <br />measures will need to be maintained throughout the construction period, and <br />until an effective interim stabilization vegetation cover is established. In <br />addition, please delineate the East Salt Creek buffer zone that is not to be <br />disturbed on Figure 2.2-2 or 2.2-3, and specify that the buffer zone will be <br />clearly marked, in accordance with Rule 4.02.5 and 4.05.18(2). <br />Rule 2.06.8 Alluvial Valley Floors <br />59. Permit Section 4.1.2.5 "Alluvial Valley Floor" was not revised for TR-16. Item <br />12 of the cover letter indicates that "the new gob pile and associated facilities are <br />not located in the delineated alluvial valley floor". Based on our comparison of <br />the TR-16 Facilities map to permit Figure 4.1-2 Preliminary Alluvial Valley Floor <br />Identification, it appears that the proposed sediment pond and topsoil stockpile <br />would be located within the alluvial valley floor (AVF) boundary, although the <br />boundaries of the AVF relative to the proposed facilities are difficult to determine <br />with certainty, due to the small scale of Figure 4.1-2. We have the following <br />requests regarding AVF disturbances associated with TR-16. <br />a) Please include the delineated East Salt Creek AVF boundary within and <br />adjacent to surface affected areas on one of the large scale TR-16 maps <br />(Figure 2.2-2 or 2.2-3). <br />17