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STATE OF COLORADO <br />OFFICE OF THE STATE ENGINEER <br />Division of Water Resources <br />Department of Natural Resources <br />1373 Sherman Street, Room 818 <br />Denver, Colorado 80203 <br />Phone (3031 866-3587 <br />FAX (3031 866-3589 <br />Mr. Joseph J. Dudash <br />Environmental Protection Specialist <br />Divsion of Minerals and Geology <br />1313 Sherman Street, Room 215 <br />Denver. Colorado 80203 <br />pF'~O <br />4FCFj~ED ~`'= `°b <br />,.~,ed O <br />MAY 0 3 1995 ~'~''~° <br />~ IBT6 i <br />JIVI$1U0 UI IVliOeral$ ~ Roy Romer <br />Geology c~,ernor <br />lames S. Lochhead <br />Executive Director <br />May 3, 1995 Hal D. Simpson <br />Siaie Engineer <br />RE: Trapper Mine (Permit No. C-81-010) <br />Technical Revision No. 67 (Oak No. 1 and No. 2 Ponds) <br />(Location: SWi/4 of Section 30, Township 6 North, Range 90 West <br />Dear Mr. Dudash: <br />This office has reviewed the information provided in your letter of April 28, 1995, relative to <br />the referenced Technical Revision. The following comments are provided: <br />1) The described impoundment structures, which are proposed to be 14 feet in height and <br />impound 2 acre-feet each, will be non-jurisdictional erosion control structures as defined in <br />C.R.S. 37-87-122 (1990). <br />2) These structures must be located on drainage channels determined by the State Engineer <br />to be normally dry (the Divsion Engineer can make this determination). <br />3) Pursuant to Rule 11 (Non-Jurisdictional Dams) of the "Rules and Regulations for Dam Safety <br />and Dam Construction" (September 30, 1988), the referenced structures may have minimum <br />freeboard requirements. <br />4) The referenced structures must meet the standard specifications for erosion control dams <br />on file in this office. <br />5) Construction cannot commence until the State Engineer has approved the erosion control <br />dam application pursuant to C.R.S. 37-87-122 (1990). <br />Provided the statutes and rules and regulations cited above are complied with, this office <br />has no objection to the referenced Technical Revision. <br />Sincerely, ~ <br />~~~~~ ~~ <br />Chuck Roberts <br />Professional Engineer III <br />CR/jmg:6395 <br />cc: Ed Blank, Division 6 Office <br />