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e <br />2. The information in the application pertaining to ,tie hydrology/erosion <br />control is very general, and omits any discussion of the technical <br />aspects of the design. What are the design storms, peak discharges and <br />flow velocities used in the design (please include supporting <br />calculations). A list of reclamation and erosion control techniques <br />,/ "available for use" is included (pages E-I through E-3 ); but there is no <br />indication of which of the measures the operator intends to use. <br />Please describe what the operator will commit to doing, not just what <br />the choices are. <br />3. On page E-5, you indicate that "the operator will remove and regrade <br />all sediment and siltation structures...". What sediment and siltation <br />structures wi 11 de constructed (please include all design criteria and <br />supporting calculations)? <br />4. rrom the reclamation plan map, it appears that no outlet has been <br />~ provided for drainage in the Phase III area. Please ,i~~jxata how <br />drainage from this area will be handled. z a~p~~m <br />5. We recommend that you consider incorporating several small ponds or <br />other permanent impoundments as part of your final reclamation plan. <br />This would greatly enhance the post-mining utility of the property as <br />rangeland. <br />6. We recommend that you include two additional species in the proposed <br />seed mix: a) snowberry, to re-establish the stands as recommended by <br />the Division of Wildlife; and b) fringed sage, to help insure rapid <br />establishment of protective vegetative cover. <br />pla~f 7roN•~~ ire 1. a <br />7. We forsee difficulties in redistriouting topsorl~on the site at a 3" <br />depth. We recommend salvaging a layer containin " -`'° +~~coi_1_ <br />mixed withsufficient overburden material to all % l~T sr ~ s.-,% <br />% minimum 6"layer prior to reseeding. // / _ <br />Water Information (Exhibit G) -'i~,.- ~ ~ <br />1 . Reference i s made to a haul road crossing of Wi ~ ~ ~9~~"' ~ 9~ "' ~~' <br />one-half mile east of Ridge Road, which is desi ~~.._ `, ~ •~~~ <br />peak flow. What is the five-year peak discharg_. - <br />area? What culvert type/size will be used? Please provide deta~~~ ,,, <br />this design and supporting computations. <br />2. One or more wells are to be constructed for use on-site. Have permits <br />been applied for? What are the expected raw water/consumptive use <br />requirements of the operation? Is non-tributary ground water to be <br />/ used, or are water rignts to be used to augment diversions of tributary <br />gr,~n./ water? <br />- 2- <br />