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• ~ III IIIIIIIIilllllll STATE OF COLORADO DIVISION OF MIPJERALS AND GEOLOGI' Drpanmenl of Yalu ral Brsuurcee I }1 t Sherman $L. Boom '_ i i Den•. er. Colorado 80?O i Phone d0i. 866-ii6- F.41 .303 A}'-81 Ob MEMO DI<'IS ION OF MINERALS GEOLOGI' 0. E C L A M A T I O N MINING•s AFETY MINERALS PROGRAM POLICY Co. e~nrn TO: Minerals Staff ~ r,,,~ E ~\.irt lg. [.e~u,,.~, n„,.~.~, FROM: HBH !~ .r,: n~..lu Lnnq DATE: March 29, 2000 RE: Policy On Application Reviews Involving Lined Sand and Gravel Pits The Division has received comments from applicants and their consultants concerning Division request for design information related to Lined sand and gravel pits. These comments questioned the need for :;uch information, as well as the Division's technical ability to review it. It is clear that the Division has a need for such design information in order to calculate an appropriate reclamation bond. It is also clear that the Division has the technical expertise necessary to ; eview the engineering evaluations and designs. However, it is correct that the actual authority to review and approve such designs rests with the Office of the State Engineer (SEO). This review and approval authority is clearly stated in their "Proposed Guidelines for Lining Criter;a For Gravel Pits"(8/16/99), and verified through conversations with personnel in the Office of the State Engineer. Therefore, the Minerals Program will no longer approve engineering designs for installing liners that are intended to meet SEO water rights protection criteria. An applicant, however, shall be required to provide DMG any of the following in order to demonstrate compliance with Section 3.1.6 of the Construction Material Rules: • A copy of [he SEO's letter approving the proposed liner design and a copy of the design and specifications for inclusion into the applicant's application prior to the Division's approval or recommendation date, or • A committnent to stay at least two feet above the historic highest ground water level together with an adequate means to monitor compliance, or • A bond adequate to bacl:fill the pit to t~vo feet above the historic highest ground water elevation. or • A letter from the SEO stating that the applicant has satisfied the SEO requirements for an augmentation plan or substitute supply plan for ground water exposed to evaporative loss and has an associated well permit.