Laserfiche WebLink
~Se$rv'ing Our Clients Since 1980 <br />V~ <br />~C engineering <br />A DIVISION OF WESTERN WATER CONSULTANT:, INC. <br />Civil Environmental Mining Water Fiesources <br />61 I Skyline Road Laramie. Wpomine 3'_070 (307) 711-0031 FAX (307j 711-=:913 E-mail: infolar@wwcengineering.com <br />July 30; 2002 <br />Mr. Crellin Scott <br />Colowyo Coal Company L.P. <br />5751 State Highway 13 <br />Meeker, CO 81641 <br />RE: Colowyo Impoundment Evaluation, Stoker Pond. OOSA <br />Dear Mr. Scott: <br />WWC Engineering (WWC) has performed an evaluation of the Stoker Pond at the <br />request of Colowyo Coal Company. The evaluation was performed following the outline of the <br />Streeter Gulch Pond evaluation submitted to you in March 2002. The objective of this exercise <br />was to evaluate compliance of the Stoker Pond with Section 4.(15.9 of the Division of Minerals <br />and Geology regulations. <br />This submittal inchtdes the following attachments. <br /> <br />I. Reclamation Blocks Stoker Pond, OOSA. This drawing depicts the post-mining <br />topography on which the pond evaluation was based. the Stoker watershed outline <br />and the reclamation blocks by year from which the worst-case drainaee scenario was <br />developed. State Highway 13 and Good Spring Creek are also indicated. <br />2. Sedimentation Pond Redesign Stoker Pond, OO~A. This drawing depicts the post- <br />mining topography and the SEDCAD 4 watershed dissection. <br />3. Pond Footprints Stoker Pond, OO~A. There v'e no post mining ponds in the Stoker <br />Pond watershed. <br />4. Stoker Pond, OO~A .As-Built. This drawing. prodded b} Colow~u Coal Cumpany. <br />was used to obtain the dimensional information necessary to model the pond in <br />SEDCAD 4. <br />UTH[It LUC'-1 ~IU.A~S <br />ItilJ Terri d~ruua IT E.ni I-n.i tier::; iUl >nOar Dric:. Suim _'.. <br />Sheridan. \1'nmting ti'_SUI Gillaua.\1\ninin ti'71h Caper.\\\omine ti?GIII <br />Phunc 131171 G7_-11761 Phone~307i 6N_-I HSU Phunc 1 3 0 7 1 -17 3-1 7117 <br />Ric 11(17) 671-1_'65 Fay i 10716F'_-'_'_>7 Fay (311T '_ 37 ~113'_K <br />L-mail: infoshrCdwa'cengincerin~unn F-mail: mlim_hC wtcccn„incariu,~.rum C;-hail: inlix:+p@tru~cengineering.com <br />Pot~cr BIurA Building <br />7 \1'a>I 6'"Accnua. Seim lE <br />Helena. AInmuna 596!11 <br />Phone 11061113-3)6' <br />Fax M(161117-1?i5 <br />E-mail: inli~hln~ mwctngi neering.ann <br />