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~~ ST?~T~ OF COLORP~DO DIVISION OF MINERALS AND GEOLOGY Depanmenl o~ ~awral Rrsour[es I ] 1 ] $6r. nian $1., Ruom_ 1 i Drnrrr ~uluracln NO'_U3 Vhunr I ~li]I Nnh-3i6,- MEMI~ MINERALS PROGRAM POLICY T0: Minerals StatT ! 1~ I FROM: HBH ~ . ~ I` I ~~ - j DATE: May 9, 2000 RE: Addendum To The Minerals Progrlm Policy On Application Reviews Involving Lined Sand and Gravel Pits, Original P~>'Gcy Dated march 29, 2000 DI~'ISIOF Oi MINEFALS GEOLOGY 0.ECL+n •~ipN niral ~+G•S.FET* a,+l n..,•,. cam.:. ,~, Get C. tt.J, n¢r Ew(Vli•e J~rectnr ~•IiCNaClB Lon_ ~ ~•~.Nrl J'4UW This addendum waz prepazed by Division staff at the request of a consulting company, and is intended to address specific conccros that have been raised by users of the 3/29/00 policy. Under the regulated construction option, an Operator is required to provide a construction report detailins the construction of a slurry wall cr pit liner. The report would typically include a project description, construction summery, a description of any problems that occurred and their resolution, a discussion of construction quality assurance observations and a tabulation of test resulu. The report would also include a certification from the quality assurance engineer that the facility was constructed in accordance with the approved design plan. The regulated construction option also requires Operators to provide a commitment that approved plans and specifications will not be altered without the Division's consent and to provide a construction schedule to facilitate•inspections by the Division. With this level of regulatory control over the installation of the slurry wall and pit liner, the Division would not typically require submittal of any interim construction reports. A final construction observation report submitted following completion of the facility is sufficient. Operator's must summarize the prop ess on installation of slurry walls and pit liners that take more than one year to complete in the annual reclamation re fort required under 3432.5-1 ! 6(3)(a), C.R.S. However, the level of detail required in the annual reclamation report is much less than in the final construction observation report. Information required in the annual report includes a discussion and a map showing the extent of current disturbances to affec[ed land, liner or slurry wall installation accomplished [o d:t[e and during the preceding year, new disturbances that are anticipated [o occur during [lie upcoming year, liner or slurry wall installation that will be performed during the coming year, and the dales the liner or slurry wall ins[allation occurred during the report year. 2 The discussion and example specifications and quality assurance plan included in the 3/29/00 policy are not intended to be exhaustive. The 3/2'x/00 policy memo example includes no discussion of pit liners and does not go into detail on the necessary quality assurance