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/t1-200_5--Os--o 7 n,evS <br />Cazier, Tim <br />SP[LL141 -fY 9,F-S716-Al 1)rSCusS / ©,�S <br />From: Cazier, Tim <br />Sent: Tuesday, January 17, 2012 11:21 AM <br />To: _�, 'jamespirc @aol.com' (3,,�rr5 p,r.o�f`l�1� �rfH,P�cI� �xPLVR+4T�v.�✓ ft <br />Cc: Means, Russ <br />Subject: RE: Latest Email on Spillway Design <br />Categories: Hard Rock <br />Mr. Pierce, <br />Thank you for the full link. I was able to download the document you referenced and review it. <br />It appears to me that you are pulling pieces from different designs that have not been used in one design application <br />together. A spillway is a hydraulic system and each element of the design needs to function in conjunction with the <br />other elements to minimize the potential for failure. The "earth plug" from the Pennsylvania Dept. of Environment is <br />intended to eliminate the need for a cut off wall in the riprap lined spillway, not cover the filter fabric. The earth plug <br />needs to be a minimum of five feet long, but the detail indicates the riprap -lined portion is at least 90 % of the level <br />section of the spillway. The Golder design was a preliminary design /not for construction /for discussion purposes only <br />letter. There is no way to discern if what was proposed was in fact approved and /or built. In addition, the proposed <br />Golder spillway slopes do not exceed 30 %, the proposed J Bird spillways are 33.33%. <br />The Division recommends that in order to avoid additional time for review and increased costs to the operator for <br />special designs, conventional spillway designs be proposed in future revisions. <br />Thank you. Please contact me if you require additional clarification. <br />Tim Cazier, P.E. <br />Environmental Protection Specialist <br />Colorado Division of Reclamation, Mining and Safety <br />1313 Sherman Street, Room 215 <br />Denver, CO 80203 <br />ph: 303 - 866 -3567 x8169 <br />fax: 303 -832 -8106 <br />tim.caziergstate.co.us <br />From: iamespirc @aol.com Lmailtoaamespirc @ aol.com] <br />Sent: Thursday, January 12, 2012 3:20 PM <br />To: Cazier, Tim <br />Subject: Re: Latest Email on Spillway Design <br />Mr. Cazier - <br />Sorry about that, this should do - <br />httD: / /www.vukonwaterboard.ca/ reaisters /auartz /az08- 084/Volume %202 /1.6.3Nolume %202 %201 -6 -3. Ddf <br />Sincerely - <br />James Pierce, Jr <br />