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r1EMO RArr nuM • T0: Tvrin Pines Coal Co, Inc, December 6, 1983 FROr9: Lawrence ~, White, P. E, SUBJECT: Hydrological Consequences of Trrin Pines PIo, 2 Mine on Caldirolc No, 2 Mine l"Jell 1, Discussion of Problem: The town of Coal Creek owned water rights which included a well at the Caldirola No, 2 Mine, These rights vrere decreed in Case 2637 on February 14, 1916 in the District Court of Fremont County, all with appropriation date of March 5, 1884, and all are alternate points of diversion granted by this vrater court in Case VJ-4221 on August 22, 1975, In 1982 the tovrn of Coal Creek joined the city of Florence and the town of Williamsburg in a joint water system, All of the above water rights were abandoned to the stream system upon completion of the water system, and equipment was removed except that the Caldirola No. 2 Mine Well and the Williamsburg Wells No. 1 and No, 2 can remain eeuipped and be used for emergency or fire-fighting purposes, l'Jhen not so used, said yells are to be capped and locked, The transfer and abandon- ment of the vrater rights is explained in detail in Case No, 80C6'J93 filed in the District Court in and for 'later Division • No, 2, State of Colorado, dated August 3, 1982 and recorded in Book 679 Page 497, As discussed in the Small Operators' Assistance Program or S,O.A,P, Report prepared by J, F, Sato and Associates (included in the Hermit application), the proposed workings of Twin Pines IVo. 2 mine lie geologically downdip from the Caldirola rlo, 2 S~Iine '!fell, Consequently, concern was expressed by the Land Reclamation Division that the quantity of water in the well would be affected by development of Tvrin Pines No, 2 Mine, The concern was so indicated in proposed stipulations set forth in the permit findings documents, This matter was not pursued at an earlier date as the S. O, A. P, report expressed little con- cern over the effect of the mining operation on surface or underground vrater sources as stated in Section 2,04.7(3) Alternate Water Supply Information, Page JFSA-57, of the J, F, Sato Report, 2, Results of Investir;ation: After revievr of the preliminary find- ings of the Land Reclamation 1ivision, an investigation was initiated to further define the probable effect by the mine on the well. A summary of the facts related to the well are as follows: a) The Caldirola I4o, 2 IQine operated from 1950 until 1962, The coal was reached by an inclined roc!: slope, The mine • map is shown on Drawing No, TP-7. The Following statements erere taken from men who had vrorked in the mine: