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• • iii iiiiiiiiiiu iii ~ ~ ~ K°A 30 December 1994 Geofecnnical Engineers & File NO. 20200-003 Environmental ConsuHents ,"~ State of Colorado `,, Office of the State Engineer ~~ Water Supply Branch R• 1313 Sherman Street, Rm. 818 ~ '~',. Denver, CO 80203 ' ,~., Attention: Mr. Dick Wolfe, P.E, Subject: Cooley Gravel Company -Morrison Quarry DMG Amendment No. 4 Dear Mr. Wolfe: On behalf of Cooley Gravel company, I am writing to thank you and Judy Sappington for taking the time during eazly December to meet with Mike Refer, Tom Hatton„ Kent Pease and me to discuss the water storage and water rights aspects of the subject Regulaz (112) Mining and Reclamation Permit Amendment. Our interest, as we told you, was to involve the State Engineer's office eazly in the process of permit amendment review by DMG and to seek your guidance relative to your office's review of proposed site reclamation involving raw water storage reservoirs. Aside from expressing our gratitude for your interest and involvement, this letter also provides an opportunity to summazize our understanding of your input from the meeting, obtain clazification if necessary, and inform DMG that we have met with you to discuss the project. Following introductions and an informal overview presentation by Cooley representatives about the annexation of the quarry into the Town of Morrison, and about the conceptual design of proposed raw water storage reservoirs, several discussions ensued concerning existing conditions at the quarry, substitute supply plan requirements, potential additional design requirements and miscellaneous related subjects. The following points were noted by Cooley: • The State Engineer review of the permit amendment will deal with potential jurisdictional dam safety and water rights issues. • New general criteria for substitute supply plans aze available in draft form and should be consulted when the substitute supply plan for the site is modified. • Seepage criteria in SB120 do not apply to the site because it is a hazd rock quarry not a sand and gravel quarry sited in tributary alluvium. • Once a persistent water table is encountered during future mining, and NPDES dischazge dewatering begins, the State Engineer wants to ensure protection of downstream water rights on both Bear Creek and Turkey Creek. ID8135.1q 1600 8roadwav Suite 1125 Demer,C0 H0202 Offices Scarbnrnuv;h, blame Rcnhecter. .Veer lock Tel: 303/33?-9636 Cambrtd,Ge. blas..uhusetb Sil cer Senn„1•lanimld Cle~'cland, Ohio Fax: 303/832-Y616 Glustonbun•, Gmnd~ucut Na11on1. \e+~ H, mp>hire