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III IIIIIIIII1111111 <br />~g Cyprus Yampa Valley Coal Corporation <br />An Alfiliafe of Cypus Minerals Company <br />29587 Roull County Roatl #2) <br />Oak Creek, CO 80487 <br />Phona (303) 8793800 <br />January 19, 1989 <br />David Berry <br />Colorado Mined Land Reclamation Division <br />1313 Sherman Street, Room 215 <br />Denver, CO 80203-2273 <br /> <br />JAN ? 3 1989 <br />l-(EG}..iyfui,b•,-r~:h; t7.'VL 'OiU <br />Dear Mr. Berry: <br />Re: Channel Repair Field Notes <br />Attached, please find the field notes from ACZ that were generated <br />during their supervision of the channel repair project. I believe these <br />notes adequately address your request. <br />In reference to the materials testing program I have attached the lab <br />reports. which addresses the size gradation of materials placed in channel. <br />In reference to durability the results are as follows: <br />spec gravity = 2.77 <br />L.A. Abrasion (ASTM C-131) = 18.6% <br />Freeze-thaw (12 cycle) = 0.5 % <br />These results are on the rock from the pit located near Craig. <br />I believe the above and attached reports adequately address your prior <br />request. If there are questions, please contact me at your convenience. <br />Sincerely, <br />Richard Mills <br />Supervisor; Environmental Affairs <br />RAM:dg <br />Attachments <br />CYPRUS <br />