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<br /> C <br />~ 1 1 v qtr <br /> • . <br />- ~^~ SNOWMASS COAL COMPANY <br /> Mini Olllc4: P.O. Boa 980 <br />A <br />~~~ - cc 7 ~~~ <br />O <br />r <br />t <br />/ Carbondale, Colorado 81623 <br />(303)9833440 <br />H 1 <br />l <br />:>: <br />, _ ~~ Osn,sr Olllcs: Suite 2300 <br /> 410 Seventeenth Street <br /> <br />~ ~,. 5 <br />~ Denver, Colorado 80202 <br />- ~~ - (303) 8251968 <br />April 4, 1985 <br />Mr. Robert Liddle <br />Reclamation Specialist <br />Colorado Mined Land Reclamation <br />1313 Sherman Street, Room 423 <br />Denver, CO 80203-2273 <br />RE: North Thompson Creek Mines Augmentation Plan <br />Dear Mr. Liddle: <br />As you know, Snowmass Coal Company has agreed to file an augmentation plan to <br />mitigate any depletions to North and Middle Thompson Creeks caused by our mining <br />operations. Snowmass has agreed to file this plan in 1985 after we have col- <br />lected low flow data from our stream flumes. <br />To date, Snowmass has installed the upstream and downstream recording devices on <br />North Thompson Creek. Work will soon begin on the Middle Thompson Creek flumes <br />so that we can begin recording flows less than 30 cfs when spring runoff subsides. <br />Snowmass will have data from these devices for the sulmner and fall of 1985. <br />Snowmass is concerned that these few months of data will not give us a complete <br />representation of possible stream depletions. Snowmass would like to obtain data <br />from these flumes in 1985 and 1986 before we submit a formal augmentation plan. <br />This will allow us to obtain a more complete picture of what is happening to the <br />stream flows in this area. Snowmass feels that this extension for filing an <br />augmentation plan will not affect any senior water right holders because of the <br />following reasons: ~ <br />1) Since July 26, nowmass Coal Company has temporarily ceased all mining <br />operations. Our wash plant and longwall (two of the biggest consumptive <br />water users) have been shut down. Approximately 200,000 GPD of water is <br />being pumped from the mines daily to North Thompson Creek; therefore, there <br />are no depletions of North and Middle Thompson Creeks taking place at this <br />time. It now appears that Snowmass will be idle through 1985 and possibly <br />through 1986. Consequently, Snowmass will continue to pump approximately <br />200,000 GPD of water into North Thompson Creek through 1986. <br />2) Snowmass has received approval from the CMLRD and the State Engineers Office <br />to enact a temporary augmentation plan. This plan calls for the discharge <br />of 64,800 GPD of water into North Thompson Creek. This figure was based on <br />