2005-12-27_REVISION - M2000158 - Laserfiche WebLink

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~EHVIRONM ENT, ,ING. - - - PAGE 3 ~~ . ' ':GEC'Ebt B`ER 23; 2005; - ~ ~ - -_ ~~ . - - :1 armoring is needed `at-this time. As mining has moved north`on the, :, j area west .of the Plant Site it is getting further=from the ri~rfr andtno shoreline armoring-,will be needed until minicig is'done on ,,~ the.southwestern -side of the Sharkey's -Lake area withn,the °,,~ `Reservoir aea. A,number of old car:tiodies were used: to armor the , north riiier bank in this area. The cars appear to`be from the- - 1950's and. have survived, the 196.5 and 1973 flood§: They: have ' provided adequate `protection for"this section and will. no"t be - replaced in the future: we do-not .plan to mine within 150 feet of the rise= in this area at thi§ time. I will begin to prepare , a map showing the current armoring status along the tiger so'the Division"and PS&G will have an idea of where armoring is needed and where'it exists at this time. _ , - 7: PSfiG submitted the Slurry WaT1.Desigm to the Division"for. review and, approval on 12/7705. If approved the .slurry ,wall will be ' ' installed and no mining will take place within the fined .area until. , the Construction :ind Engineers Certification is accepted by fhe ,Division -.and aci: appropriate .bond is submitted and accepted. ' Publication of the: rehearing. began on 11/17/05 and the public comment period ends '12/28'/05. ' 8, i concur with your arialysis up to where you added the cost of rip I raping the,riyer. This is un-needed, at this time since the river bank is armored next. to where mining is taking place and. it is ". armored along the riverside, of the Siiarkey's, Lake. area. where the - - I slurry wall will be installed,: See Exhibit C-1=TR. At some time we will need to install the reservoir side rip-rap but thap will- ,be aomeiime in the future. I think the bond should be $177,099.00'-. or $177,100.00. To get this number i used your wo=ksheet anti took- the riprap costs out and the recalculated the percentages basefl on I .'$1;49,170 that is the total for-Task Numbers l thru 5. ^ LIST OF ATTACHMENTS TO THIS RESPONSE: ,;' Adequacy Figure TR-1' (corrected, and revised) Sharkey Lake Mining Plaq Map ExhibA C-1 TR (revised) Photos of armoring. referenced to Figure TR-1 (Figure TR-2) I.hope these responses have addressed the adequacy,'questions-you ' had.' i will place a copy of this packet with-the Weld County Clerk of the Board as required." If you have any questions please"call me. _, _~ .Sincerely, ronment, Inc . E n i I ~w' '''' ^ ~ I Stevan L. O'Brian - President. • 1 ec Platte Sand.& Gravel LLC ~ ~ ~ ~ file. ~ enclosures ~ r ` :~ eta Y ' `~ ~ "'A'D-+M.' J ~ h , M .. .," .. d.~ 3~ `H.Y iA~tF.. P ! .~~ f ~ y "~-4 S E ~~~ ~'