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Mr. Richard Raines June 22, 2006 Page 5 the final determination of augmentation credits for the irrigation season can be made along with mapping showing any revisions to the dry up acreage. Credit from any dry-up fields containing alfalfa or native grass will be assessed in the following manner: (a) For fields deep tilled or chemically treated to successfully kill alfalfa or native grass, 100% credit will be given for consumptive use as otherwise computed under the conditions of this approval. (b) For fields not deep tilled or chemically treated to successfully kill alfalfa, records of monthly monitoring of depth to groundwater at existing irrigation wells or existing or new monitoring wells or piezometers within'/<-mile of each alfalfa or native grass field must be maintained. Credits will be reduced according to the following table when depth to groundwater is less than the depth assumed to provide no significant contribution to alfalfa growth. Measurements taken at the start of each month will determine the necessary reduction in credit to be applied during the following month. The applicant may use another methodology upon review and approval by the State Engineer and Division Engineer. Depth to Ground W Percent Reduction in CU Credit' ater (Feet) Native Grass Alfalfa 1 85% 100% 2 50% 90% 3 30% 75% 4 20% 50% 5 15% 35% 6 10% 20% 7 5% 15% 8 0% 10% 1. Adapted from EVAPOTRANSPIRATION AND AGRONOMIC RESPONSES IN FORMERLY IRRIGATED MOUNTAIN MEADOWS,South Park, Colorado, March 1, 1990; Revised September 1, 1991 10. This substitute water supply plan may be revoked or modi£ed at any time should it be determined that injury to other vested water rights has or will occur as a result of this plan. 11. Lafarge, West, Inc. filed for a plan for augmentation for the Port of Entry Pit site in case no. 2004CW111 and filed for a plan for augmentation for the Weizel Pit site in case no. 2002CW205. Lafarge is required to operate the Port of Entry Pit site and the Weizel Pit site under a SWSP until such time that a decree is entered in case nos. 2004CW111 and 2002CW205. If reclamation of the mines at the Three Bells Pit and Kyger Pit sites produces a permanent water surface exposing groundwater to evaporation, an application for a plan for augmentation must be filed with the Division 1 Water Court at least three years prior to the completion of mining to include, but not be limited to, long- term evaporation losses. If a lined pond results after reclamation, replacement of lagged depletions shall continue until there is no longer an effect on stream flow. Granting of this plan does not imply a position by our office on any litigation associated with case nos. 2004CW 111 and 2002CW205 or any other case. 12. Dewatering at the Kyger Pit and Three Bells Pit will produce delayed depletions to the stream system. As long as the pits are continuously dewatered, the water returned to the stream system should be adequate to offset the depletions. However, once dewatering at