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STATE OF COLORADO <br />OFFICE OF THE STATE ENGINEER <br />Division of Water Resources <br />Department of Natural Resources <br />1313 Sherman Street, Room 818 <br />Denver, Colorado 80203 <br />Phone (303) 866-3581 <br />FAX (3031 866-3585 <br />OF. ~~t0 <br />Fci <br />~~ b <br />I~ ~ ` ~ <br />.~ <br />~ X8'!6 <br />Roy Romer <br />Governor <br />RF~EIVEgame,s LuchheaA <br />Etiecunre Direttor <br />April 26, 1995 MAy p 1 19~,,, DE Smeern <br />pivision of rvune(ais ~ Geolo9Y <br />Ms. Barbara L. Pavlik <br />Environmental Protection Specialist <br />Division of Minerals & Geology <br />1313 Sherman Street, Room 215 <br />Denver, Colorado 80203 <br />RE: Eastside Mine (Permit No. C-84-063) <br />Technical Revision No. 12 (Change in Water Monitoring) <br />Dear Ms. Pavlik: <br />With regard to the referenced Technical Revision No. 12 proposal, this office has reviewed <br />the proposal and the hydrology section of the permit application to determine if the proposed <br />technical revision would have adverse water resources impacts; specifically, the following have <br />been reviewed: <br />1) The groundwater modeling done utilizing the "AQUILIS" model to simulate confined! <br />unconfined aquifer responses to mining. <br />2) The technical revision proposing to reduce but not eliminate groundwater quality monitoring. <br />3) The plan of augmentation decreed in Division 5 Water Court in Water Court Case 91 CW081. <br />This office has no objection to the proposed Technical Revision No. 12 (Change in Water <br />fdenitoring) in that no adverse water resource impacts are perceived. <br />Sincerely <br />~s~~i~~- <br />Chuck Roberts <br />Professional Engineer III <br />CGR:jmg <br />6386L.cgr <br />