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• i <br />Mr. Gib Rindahl -2- <br />January 17, 1985 <br />To maintain soil quality and quantity, the Division recommends the soil <br />~~ stockpiles be sloped to no steeper than 3h:ly and be seeded with a cover crop <br />if the pile is to remain for more than one growing season. Is this acceptable <br />to the operator? If not, please specify why. <br />During the inspection of this site, there was a brief discussion about <br />/ upgrading the access road from highway 93 and installing a 300 foot long <br />J entrance ramp curving towards the north from the access road to highway 93. <br />None of these activities are currently included in the permit application. <br />Since these activities are due to this mine operation, please include them now <br />with supportive text and maps and additional application fees, if needed. <br />Exhibit E - Reclamation Plan <br />/ The first part of page 6 addresses intercepting a perched water table. <br />_ i However, no where in this exhibit is the water table addressed. Will flow <br />~J continue after mining ceases or will the perched table be repaired? Please <br />v clarify this matter. <br />J Page 9 - Pond A addressed that the pond would have to be cleaned out every 3 <br />years with two acre-feet of sediment being removed. Mr. Stanton's letter <br />(D.8) requested where would this material be placed. The response in J. <br />Silvernale's letter specified "Ponds will not be cleaned out". Please clarify <br />this apparent discrepancy. <br />Page 11 addresses broadcast seeding of the site. It is unclear why the <br />broadcast method of seeding will be used when the more successful drill <br />seeding method could be employed. Normally, broadcast seeding is utilized due <br />~~ to the severity of slope and consideration for the safety of the workers. <br />However, the maximum slope at this site will be 5h:ly; a slope gradient <br />readily accessible to drill seeding. With the inherent greater success of <br />drill seeding versus broadcast seeding, why will this site be broadcast <br />seeded? If broadcast seeded, what will be done to insure good seed-to-soil <br />contact? <br />The last paragraph on page 11 raised two concerns: <br />< <^'~ 0K `1. How many soil tests will be done per acre(s) to determine type and <br />~u. ~ amount of amendments to be incorporated into the soil medium? <br />h <br />~'P~, Why is not mulching necessary when the gravel material should be <br />removed from the soil medium as addressed in the screening process <br />,~~PN' on page 6 - 1st paragraph? With the gravel removed, the soil <br />~yf medium would be more susceptible to erosion; therefore, some form <br />~~.t~~'~~,of mulch is needed, especially due to the extreme high wind <br />conditions of this site. <br />\O r should commit to ripping the plant site area and any haul roads <br />.getation to alleviate compaction problems. Is this acceptable to <br />iessary to rock rip-rap any of the east west drainages to reduce <br />potential soil erosion? <br />