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III III'IIIIII'IIIII DocDate:12H1/2001 <br />sss <br />PAr3GEL, MAUI3O, HULTIN & SPAANSTKA, P.G. <br />• ATTORNEYS AT UW <br />SUITE 3600 <br />IB OI ULIFORNIq STREET <br />DENVER, COLORAW 60202 <br />TELEPH ONE 13031292-Ba00 <br />B RENT C ANDERSON TELECORIER 13031 z96~3oao <br />9 i ~ ~ ~ ~ Y <br />October 4, 1990 <br />OCT 0 4 1990 <br />SLIVERED BY MESSENGER Mined Land <br />+~eclamation Division <br />Mr. Fred Banta <br />Colorado Mined Land Reclamation Board <br />1313 Sherman Street, Room 215 <br />Denver, Colorado 80203 <br />Re: The Rockcastle Company/Grassy Gap Mine -- Permit No. <br />C-81-039 -- Submission of Engineering Reports <br />Dear Fred: <br />On June 26, 1990, The Rockcastle Company ("Rockcastle") and <br />the Colorado Mined Land Reclamation Division ("CMLRD") entered into <br />an agreement (the "CMLRD Agreement") whereby Rockcastle would <br />conduct specified reclamation activities and submit specified <br />engineering studies as part of Rockcastle's reclamation efforts at <br />the Grassy Gap Mine site. Pursuant to Section § 4.1 of the CMLRD <br />Agreement, Rockcastle agreed to complete an engineering study <br />identifying any geotechnically and geomorphically unstable areas of <br />Pits 5 and 6. Pursuant to $ 4.2 of the CMLRD Agreement, Rockcastle <br />agreed to reassess the geotechnical stability of the potential <br />slope failure adjacent to the Pit 4 haul road. BasQd upon these <br />studies, and recommendations contained therein, Rockcastle agreed <br />to conduct, where necessary, appropriate reclamation measures. <br />In fulfilling its obligations pursuant to §§ 4.1 and 4.2 of <br />the CMLRD Agreement, please find the enclosed engineering studies <br />prepared by AC2, Inc. ("AC2"), on behalf of Rockcastle. Each study <br />is discussed briefly below. <br />Pit 5/6 -- Stability Analysis. <br />The enclosed stability study of the Pit 5/6 area indicates <br />that there are no significant geotechnical or geomorphic stability <br />problems at the Pit 5/6 area. Some areas of minor surficial <br />geomorphic stability were identified by ACZ. These localized areas <br />• of minor erosion do not constitute significant erosion problems. <br />However, Rockcastle will implement the reclamation measures set <br />forth more fully in the ACZ study to assure long-term site` <br />stability. <br />