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• <br />COLORADO <br />~~ <br />III I II I II I II IIII III • PETER C. LIEN (1898-1969) <br />CHARLES H. LIEN-PRESIDENT <br />BRUCE H. LU'_N~CHAIRAIAN OF THE BOARD <br />PETE LIEN~C.0.0. <br />CRUSHED LIMESTONE • GYPSUM • CALCIUM FEED SUPPLEMENT • SILICA SAND <br />Non-Metallic Minerals <br />P.O. Box 1961 <br />Fort Collins, CO 80522 <br />970493-6294 <br />Fax:970~490-1063 <br />COMPANY Located 19 miles NoAh of Fort Collins near Owl Canyon <br />RECEIVED <br />Mr. Gary Curtiss ~'a~ ~~ !~"g8 <br />Colorado Division of Minerals and Geology <br />Centennial Building. 1313 Sherman Street Division of Minerals & Geology <br />Dem'er, CO 80203 <br />SUBJECT: TECHNICAL REVISION, ROBERTS QUARRY. PERMIT 77-301 <br />A Division of Pete Lien 8 Sons <br />P.O. Box 440 <br />Rapid Ciry, SD 57709 <br />605342-7224 <br />Fax: 605342-6979 <br />Loa~ted at Interstate 90 8 Deadwood <br />25 April 1998 <br />T~ ~~ <br />Dear Gaq': <br />As discussed, this is a request for a technical revision to the Mine Plan for the Robens ~~ttarr}'. <br />changing the sequence in which the various areas are mined. <br />This technical revision does not increase the total area affected or the total area disturbed. and <br />does not change the reclamation of the atlected area, other than to make reclamation somewhat easier. <br />The reason For the change is that blending of materials from various parts of the quarry is no longer <br />needed, as was planned in 1977. and therefore having extraction of materials going on in two se aarate <br />portions of the quam is no longer required. The change in sequence +vill continue to abide b}• the permit <br />condition that the total disturbed acreage during the course of mining will not exceed 5~.5 acres at any <br />time during the operation of the quarr}'. <br />Although the original plan called for extraction from Areas 1 and 2 in Phase I, and vee are <br />currently in Phase I, we have not done any stripping or extraction in those areas. <br />To simplify your review of the technical revision proposed, I am providing three attachr:tents to <br />this request: <br />(I) a copy of the original 1977 Mine Plan (Exhibit D) with the proposed changes marked with underlines <br />for neve material and strikeout of material to be removed. Both the original and the proposed new <br />Mine Plan are three pages long. <br />(2) a copy of the proposed 1990 Mine Plan (Exhibit D) +vith the proposed changes incorporated. <br />(3) a map showing the proposed new sequence. This is a reduction of the map now used for annual <br />reporting and shovrs the same areas as the original 1977 Exhibit C map. <br />We will provide am' additional information you need to make your decision. Please call or write <br />us (by regular or electronic mad) at any time. We ask for your quick review of the proposed revision so <br />that vve can begin implementation immediately. <br />Sincerely, <br />Nathan A. Barron, PE, DEE ~ 77 <br />Environmental and Permitting Compliance Engineer <br />Colorado Lien Company, a division of Pete Lien Rr Sons, Inc. C s ~ 4.3 ~bC) <br />