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cna.ETrE snxn & c>l~nv>Fl, nvc. ~- / 9 ~ ~ - U D ~ <br />zos7s Hi~way 24 <br />Woodland Park, CO 80563 `,~~~~ <br />Telephone: (719) 657-3111 <br />Fas (719) 657 3156 AUG 0 8 2005 <br />Date: 7/26/05 <br />To: The Division of Minerals & Geology ,i"ision os Minerate _.. <br />From: Gillette Sand & Gravel Inc. <br />Re: Technical Revision of Wash Circuit/New Road Base Cut - t' K ~ 3 <br />Attn: Berhan Keffelew and Dr. Hany Posey <br />CC: The Water Quality Control Division Colorado Dept of Public Health & Envmt. <br />Deaz Sirs, <br />After many years of negotiating with the City of Cripple Creek, we were fmally able to <br />reach an agreement to purchase water from that city and tap into the existing pipeline <br />in the easement bordering the Northern properly line. A telemetry system was installed <br />at a cost approaching $25,000 for the city to be able to monitor the mines total water <br />usages. As a result of the water cost, it has become necessary to captivate and recycle <br />said water. Exhibit A shows the revised plan to line ponds A & B with indigenous clay <br />and prepare a "Potential Overflow/Runoff Containment Area" with an approximate <br />capacity of 300 cubic yards. This containment area will remain unlined so as to allow <br />any potential overflow from the ponds, plant dischazge or storm water runoff to be fully <br />contained and rapidly peculate through the highly porous and permeable native <br />substrate to groundwater. Pond B will have an overflow outlet capacity of 24 inches <br />and directed into the containment area to it"s south. Pond A will have weir set to allow <br />water flow into Pond B in the event of severe storm waters entering there. <br />Ponds A & B will have a capacity approaching 900,000 gallons with more than 90% of <br />the ponds perimeters being excavated below surface levels assuring stability for the life <br />of the structures and together with Potential Overflow feature, eliminates any possibility <br />of <br />structural breach or failure. The South boazder of Pond B will be constructed of the <br />impermeable clay found on site compacted on to and azound large boulders and concrete <br />blocks and juxtaposed to the Containment Area eliminating any possibility of surface <br />dischazge to State Waters in the most unlikely event of structural failure there. <br />Ponds A & B have a surface azea approximating 180 feet x 50 feet elongated North & <br />South. The Containment Area will again be excavated subsurface for maximum <br />effectivity and bordered on the West side with lazge boulders adding to the area <br />aesthetics while strengthening the zone along that property boundary. <br />Exhibit B shows a new road and excavation to the East of the XKE cut that contains good <br />looking road base material and hereafter shall be referred to as The Road Base Cut. This <br />area of disturbance shall be one acre or less and still puts the operation well within the <br />acreage currently bonded. <br />Sincerely, <br />Chris Pyles ~~ <br />C~l~~~ _~B~- <br />