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`C HEIFNER TEL~303-722-9067 <br />Mark A. Heifner, Plant 1';oologist <br />37 East Colorado Avenue <br />Denver, CO SU210 <br />(303) 722-9067 (Voice end Faz) <br />September 8, 1994 <br />Bob Oswald <br />Division of Minerals and Geology <br />Rm 2]5 Centennial Bldg. <br />1313 Sherman St. <br />Denver, CO 80203 <br />RE: Wording in Release Standards. <br />Snyder Quarry 1994 Amendment M-77-210 <br />Dear Mr. Oswald: <br />Sep 08,.94 719 No .`001 P.O1 . <br />• III III~IIIIIIIIIIII <br />Ychclalinn cwlnpy 999 <br />lend roelnmulien plnnninµ <br />Visual impaut annlyaia <br />Ik,cumenLnry phMnRruphy <br />Fax with mail followup s~~p <br />~B <br />~, <br />lgg, <br />.^ <br />Jim Dillie and 1 discussed some wording in a Release Standards~nd I assume the same <br />changes should be tt-ade in this response as were proposed for Pikeview. I therefore propose <br />/ the following change in the wording of the first para~ra~th.of Page 9 in Release Standards: <br />~ ~~r. -Delete the second sentence of the firsK paragraph and substitute the following. <br />~. ~~ In addition to achieving the revegetation standards, erosional damages (both old and <br />~~\ recent) moat be stabilized. Erosional damages shall inr]ude rill and gully erosion, <br />slope stumpage, and other forms of mass wasting. Erosional damages shall not <br />~U~~„p, include bench collapse provided the collapsed bench or portion of bench was properly <br />filled, topsoiled, and revegetation initiated prior to the collapse occurring and the <br />~'~ vegetation of the collapsed bench is recovering. ~ _ ~ _ _ <br />]n my opinion, the original inclusion of "sediment discharge loads," is included in <br />"erosional damages." ]f erosion is cor.;rolled then sediment discharge levels should be about <br />what would be expected under natural conditions. This is probably best measured by <br />examining sediment basins to see if they contain large amounts of recently deposited sediment. <br /> <br />Respectfully, <br />~~ ~ ~G~~ <br />Mark A. Heifner <br />Post•It'• brand fax transmlttet memo 7671 • of ws•• <br /> <br />~. ~. <br />~i. Pnon• x <br />Z~_ <br />go6~ <br />FYY/ 83 l a m <br />FeaN i1 LiL~7~ <br />1 <br />