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~ • iii iuiiiiinm iii <br />MINED LAND RECLAMATION DIVISION <br />Department of Natural Resources <br />X313 Sh,:rman 51.. Room 215 <br />Denver, ~~O 80203 <br />303 866-3561 <br />FA%:303 832-8106 <br />Of Cp(G <br />/.~~~.9 <br />~.. ; x-i <br />.~~. ~. <br />.~.~, . <br />re v5 <br />Roy Fomei <br />Gove~~a <br />F+etl R Bama <br />June 6, 1990 DrviSio~Drteclor <br />Mr. Steven Schurman <br />Min Search, lnc. <br />7985 Yance Drive, Suite 307 <br />Arvada, Colorado 80003 <br />RE: ,4dequacy Review - Hunter Bates Mine - File No. M-90-041 <br />Dear Mr. Schurman: <br />We have reviewed your adequacy responses and, with the below noted exceptions, <br />have Found them acceptable. The three items noted below still require some <br />clarification or commitment. <br />`lour response reiterated that only conventional flotation reagents will <br />be used for pyrite recovery in the final clean-up step in the <br />processing. This response is acceptable if the applicant adheres to this <br />commitment. Any changes to the reagents used in processing will require <br />notification to the Division and technical revision of the permit, <br />5c. four response to this question stated that the peat used for treatment of <br />mine and mill effluent will be incinerated and the ash backfilled in the <br />underground workings. The ash is expected to contain high concentrations <br />of metals. A potential problem exists if ground water is allowed to <br />contact these backstowed solids. The Division recommends a sample of the <br />e~sh be analyzed according to the currently-accepted EPA extraction <br />procedure (EP) toxicity from the first batch of peat fired. This will <br />identify the characteristics of the waste and its relative toxicity. <br />As on-site disposal has been chosen, and the underground workings are <br />required to be dewatered (Page C-4 ), a location for disposal of ash <br /><.:olids should be identified which avoids potential contact with ground <br />water under non-pumping conditions. A location within the workings which <br />4ri11 remain dry during mining and upon reclamation should be identified. <br />F~lease describe further your plan in this regard to insure the potential <br />for water quality degradation will be minimized. <br />8. The identification of water rights to supply water for the operation has <br />yet to be finalized. The operator has committed to providing this when <br />available from a title search. In order for the Division to make the <br />finding required under ~ 34-32-110(1)(c), a stipulation upon permit <br />issuance should be attached which requires the documentation on water <br />rights be submitted prior to the commencement of mining operations. <br />sTa'!E of coLO~o <br />