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May 2, 1994 <br /> <br />MAY 5 1994 <br />Mr. Harry Ranney <br />Reclamation Specialist <br />Colorado Division of Minerals and Geology <br />C~yi~ien el fnmeras c ~ecicny <br />215 Centennial Building <br />1313 Sherman Street <br />Denver, Colorado 80203 <br />RG: MR-4l for Change in Ditch Design -Chimney Rock Mine (Permit No. C-SL-023) <br />Dear Harry, <br />Kaiser Steel Resources hereby submits this minor revision requesting approval to change the design <br />of a portion of Ditch 4[B and 41C in the Fast Pit area. The portion of the ditch to be changed is shown on <br />the attached section of Map 8, Drainage Control Plan. The ditch, located on the steep portion of the <br />reclaimed area, will be widened, lined with rip rap, and eventually routed directly into Stollsteimer Creek. The <br />attached design parameters were taken from Exhibit 7 0( the permit document and revised to reflect the <br />changes. The design specifications are currently fora 10-year 24-hour event, however, the new ditch segments <br />have been designed to pass a 100-year 24-hour event. Requirements for the ditch arc presented on the <br />attached design specifications. <br />Should you have any questions, please do not hesitate to contact Mr. Mike Keegan ur give me a call. <br />Sincerely, <br />~~ ~~ <br />Jerry Koblitz <br />Project Manager <br />Attachments <br />cc: Mike Keegan -Eagle Mountain Mine <br />l IC/ms <br />~~~~t `~+ <br />~~ ~ ~ J <br />t/" ` <br />5990 Greenwood Plaza Blvd. Suite 250 Englewood, CO 80111 <br />(303)850-0930 Fax (303)721-9298 <br />