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l~ • <br />C c~~us <br />"`~ Yampa Valley <br />~ III IIIIIIIIIIIIIIII <br />Cyprus Yampa Valley Coal Corporation <br />29587 Routt County Road N27 <br />Oak Creek, Colorado 80467 <br />303.8793800 <br />September 17, 1990 RECEIV`D <br />David Berry, Reclamation specialist SEP 20 1gg~ <br />Colorado Mined Land Reclamation Division Mined Land <br />1313 Sherman Street, Room 215 Reclamation Division <br />Denver, CO 80203-2273 <br />Dear Mr. Berry: <br />Re: Minor Revision 90-i1, Commitment to Demonstration - Mine <br />3, Permit C-84-062 <br />In response to your letter of 17 July 1990 and subsequent <br />discussions, CYCC is submitting the following information. I have <br />listed each comment/concern from the Division and CYCC's response <br />follows each one respectively. <br />MLRD CONCfiRN: <br />1. Verification that monitoring stations 301 and 69 are upstream <br />and downstream, respectively, from the location on Trout Creek <br />where the Homestead Ditch tailwater intersects the creek. <br />Response: <br />According to the ranch responsible for the Homestead Ditch, the <br />majority of the irrigation tailwater enters Middle Creek, which in <br />turn joins Trout Creek between the two stations in question. The <br />remainder of the flow intersects Trout Creek below Station 301. <br />MLRD CONCERN: <br />2. A compilation and analysis of water quality data for the Trout <br />Creek stations, which verifies that the Trout Creek stream <br />standards have not been jeopardized by the parcel. You may <br />use those stream quality standard parameters which are already <br />used in your monitoring plan. <br />Response: <br />First, CYCC feels that such a compilation and analysis would not <br />be representative, given the size of the parcel in relation to the <br />total contributing area present above Station 69. The Foidel Creek <br />and Middle Creek Watersheds are approximately 11,360 acres and <br />16,000 acres respectively (Bob Ugland, USGS), yielding a combined <br />total of some 27,360 acres. The 16.8 acre parcel in question <br />