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~: STt~TE OF COLOIZP~DO OI VISION OF MINERALS AND GEOLOGY DeVanmrm ni .~amral Uarxwrcea 1 1 1, $h¢rni0n $L. RUOm '_ 1 i Drn~'rr Culuratl0 tIO;UJ 7hunr: Uliil Nnh-7io: F i.\ IJU .: BJ'-111 U6 MEMO :VIINERaLS PROGR4M POLICY TO: Minerals Staf£ FROM: HBI3 ~ 7 i ./ _ i DATE: May 9, 2000 RE: Addendum To The Minerals Program Policy On Application Reviews Involving Lined Sand and Gravel Pits, Original Policy Dated march 29, 2000 DlvlSlpn D~ MINERALS GEOLOGY z6c~. n.clcN MININ (.~$. ~[ CuvpnU~,- CircE ~'..~I, ni~, :.eC UI~,P J~+ti~~M ~+~cnae~ 8 lon, v~• ~.V~. J'+PIIU~ This addendum was prepazed by Division staff at the request of a consulting company, and is intended to address specific concerns 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 or pit liner. The report would typically include a project description, construction summary, a description of any problems that occurred and their resolution, a discussion of construction quality assurance observations and a tabulation of test results. 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 rep laced construction option also requires Operators to provide a commitment tha[ 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. '3Jith this level of rep latory control over the installation of the slurry wall and pit liner, the Division would no[ 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 progress on installation of slurry walls and pi[ liners that take more than one yeaz to complete in the annual reclamation report required under 34-32.5-116(3)(a), C.R.S. However, [he 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 ex[en[ of current disturbances [o affected Land. liner or slurry wall installation accomplished to dale and during [he preceding year, new disturbances that are anticipated to occur during the upcoming year, liner or slurry wall installation that will be performed during the coming year, and the dates the liner or slurry wall installation occurred during [he report year. The discussion and example specifications and quality assurance plan included in the 3/39/00 policy are not intended to be exhaustive. The 3129/00 policy memo example includes no discussion of pit liners and does not go in[o detail on the necessary quality assurance