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sss • STATF. OF COLORADO DIVISION OF MINERALS AND GEOLOGY Depanmem of NaWral Resources 13U Sherman SL, Room ]ii Denver. Colorado d0?U3 Phone. ' 3U 71 866-3 i 6 i FT r: 130E 83'~tl106 MEMO MINERALS PROGRAM POLICY TO: Minerals StafG FROM: HBH ' ~/ r-~ . 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 D I \' I S I O N O E MINERALS GEOLOGY RECLAMATION MINING•SAFETY dill O., rn. GG~'erno~ C~eRC \~.+I. nc~ E •rc ulne J~recux l~~Ch~PI B .on;. D~~~~aun Dnet mr This addendum was prepared 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 detailing 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 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 progress on installation of slurry walls and pit liners that take more than one year to complete in the annual reclamation report required under 34-32.5-116(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 affected land, liner or slurry wall installation accomplished to date and during the preceding yeaz, 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 ]finer or slurry wall installation occurred during the report year. 2. The discussion and example specifications and quality assurance plan included in the 3!29100 policy are not intended to be exhaustive.\ The 3/29/00 policy memo example includes no discussion of pit liners and does not go into detail on the necessary quality assurance