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D1/28 'DO 00:50 <br />POWDERHORN <br />COAL COMPANY <br />ID:LANIERFAX3800 <br />June 4, 1997 <br />FAX <br />FAX: <br />Mr. Larry Routten <br />Colorado Division of Minerals and Geology <br />1313 Sherman Street, Room 215 <br />Denver, CO 802D3-2273 <br />RE: Outstanding Midterm Review Issues C-B1-041 <br />Dear Mr. Routten: <br />PA(,E 1 <br />P.O. Box Il7D <br />PdIMd~. CobWnB1548 <br />(WO) IM•7Y5f <br />Fv[ (BiD) ~6/-7111 <br />Per our conversation last week, I am sending a list of issues <br />that I stall have with the midterm review for our permit. These <br />issues are listed by numbers that have been carried through the <br />review process. The latest letter being responded to is a letter <br />from Dan dated April 25, 1997. Many of the remaining requests in <br />this letter will be taken care of. The following are the <br />questions that may need mitigation: <br />B0. I have had non-discharging sumps and berms and other <br />Naeft drainage control structures in my permit for years. All of <br />S~"'r"' a sudden I am asked how I will dewater one of them. I <br />~ ,w w( <br />P~ ~ offered to pump it to another pond once it had settled. It <br />~j~r would be a minor amount of water, it would be settled prior <br />A+'~ q to pumping and would be pumped at a non-critical period. I <br />~~ySl~'~" don't believe that this scenario would affect the size of <br />the receiving pond. My current thought is that all of my <br />alternate sediment control atructuxes are or will be listed <br />in my Storm Water permit and a statement to that affect <br />could be included in out M&R permit. <br />96. This question has to do with headwater design of culvert. <br />U,,,lwf~ <br />,~/ <br />The response that <br />I have had to my design brings <br />up the <br />~ <br />,.. y issue of a person without professional certifica tion <br />q++~ ;~ evaluating work with professional certification. There is a <br />I <br />` certain amount of logic and judgement that goes along with <br />6~ ~ <br />~^ <br />'* <br />~ <br />~ <br />~ <br />~ s <br />1 .N <br /> <br />