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{ <br />iii iiiiiiiiiiiu iii <br />999 <br />STATE OF COLORADO <br />DIVISION Of MINERALS AND GEOLOGY <br />Depanment of Natural Resources <br />131 }Sherman 51., Room 215 <br />Denver, CO 80203 <br />Phone. (3031 866-3 567 <br />FAX 13031 012-81 06 <br />DATE: February 24, 1994 <br />TO: Erica Crosby <br />FROM: Susan Burgmaier~ <br />RE: Roadside & Cameo Mines (C-81-041) <br />Technical Revision 17 <br />oc cow <br />~,~ 4 <br />~' ~ O <br />~~ <br />r8 i6 ~ <br />Roy Romer <br />Governor <br />M¢hael B. Lang <br />Division Dveanr <br />I have completed a preliminary review of items submitted in support of the above mentioned <br />technical revision application. Following are comments and questions regarding the proposal. <br />Larry Routten voiced some concerns in his memo dated February 18, 1994. [have answers <br />to some of those concerns: <br />The berm northwest of the Borrow Area 1 sump does not route water uphill when the borrow <br />area has been graded to post mine contours. <br />There is a 30" CMP at the CRDA 2 access road to convey runoff from the East Collection <br />Ditch to Pond 10. The runoff previously made a 90° turn to the three CMP's that enter Pond <br />10 further north. They had problems with it and, after consultation with Janet, decided to <br />route the runoff to the pond in a more direct fashion. <br />The stream diversion below CRDA 3 is already permitted. <br />Page 150 says the road will not be maintained beyond Borrow Area 2, which is probably <br />appropriate. <br />Pond 11 has an approved NPDES discharge outfall, but it will be moved. <br />The borrow areas are bonded, but very generally (rough guess of volume and haul). I would <br />suggest editing the bond estimate tasks to specify the actual volumes and haul distances that <br />would be moved. <br />