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(c) >;xplain now the tribu a y to Hubbard Creek may be af- <br />fected by possible su ~dence. Provide a description, <br />at one locality within the permit application, of the <br />estimated probable consequences of mining on [ne nydro- <br />logic regime of the proposed I4PA and 'rIPAA under all <br />seasonal conditions, including a[ a minimum the contents <br />of dissolved and total suspended solids, total iron, pH, <br />and total maganese. <br />7ts4. 15 <br />(a) i'he premining use was wildlife habitat (c <br />habitat) and rangeland. The use is to be <br />grazing. Comments by the land leasee are <br />no[ included in the application. If this <br />is considered significant, then materials <br />(2) are inadequate or not included. <br />784.16 <br />ritical winter <br />"changed" to <br />summarized but <br />land use cnange <br />concerning 734.15 <br />(a)(1) (i) Indicate the qualifications of the designer of the <br />general sediment pond and storage reservoir plan. <br />(ii) Provide a cross section of the sediment pond along <br />its long axis including the dam and spillway. <br />(iii) Provide hydrologic data upon which the design of <br />the pond for a 1J-year, '24-hour storm was based. <br />(v) Provide detailed design plans for the sediment <br />pond,and dam and spillway structure. <br />(2,3) ~(i) Identify qualifications of the designer or designers <br />of the sediment pond dam and spillway structure. <br />(ii) Include geotechnical information and any design and <br />construction requirements for the sediment pond <br />structures. <br />(iii) Describe the operation and maintenance requirements <br />~_ for the sediment pond. <br />(iv) Describe in more detail the timetable and plans co <br />remove the pond and associated structures. Fihere <br />appropriate, the same information should be provided <br />for the smaller stockpile sediment pond as for the <br />larger storage reservoir and sediment pond. <br />(b)(1) The sediment storage capacity of the pond appears to be more <br />than adequate, however, the calculation of needed storage <br />capacity is difficult co follow and needs to be clarified. <br />Apparently the 80 acres mentioned does not include the dis- <br />turbed area and the rational for using the minimum .035 <br />factor was that the land is undisturbed. Make clear that <br />a factor of U.1 was used to compute sediment yield from <br />