2011-12-07_HYDROLOGY - M1981058 - Laserfiche WebLink

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Depth to Ground Water (Feet) Percent Reduction in CU Credit' 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% Mr. Mark A. McLean, P.E. DeBeque Pit SWSP (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. 1. Adapted from EVAPOTRANSPIRATION AND AGRONOMIC RESPONSES IN FORMERLY IRRIGATED MOUNTAIN MEADOWS, South Park, Colorado, March 1, 1990; Revised September 1, 1991 17. The dry year analysis required by this office for a permanent plan for augmentation may vary from the analysis approved in this SWSP. Approval of this SWSP shall have no precedential or evidentiary force, does not constitute an admission or statement of position in any other proceeding, and shall not imply concurrence with any findings of fact or conclusions of law contained herein, or with the engineering methodologies used by the Applicant. 18. This SWSP may be revoked or modified at any time should it be determined that injury to other vested water rights has occurred or will occur as a result of the operation of this SWSP. Should this SWSP expire without renewal or be revoked prior to adjudication of a permanent plan for augmentation, all excavation of product from below the water table and all other use of water at the pit must cease immediately. 19. In accordance with amendments to CRS 25 -8- 202(7) and Senate Bill 89 -181 Rules and Regulations adopted on February 4, 1992, the State Engineer shall determine if the substitute supply is of a quality to meet requirements of use to which the senior appropriation receiving the substituted supply has normally been put. As such, water quality data or analyses may be requested at any time to determine if the requirements of use of the senior appropriator are met. 20. The decision of the state engineer shall have no precedential or evidentiary force, shall not create any presumptions, shift the burden of proof, or serve as a defense in any water court case or any other legal action that may be initiated concerning the SWSP. This decision shall not bind the state engineer to act in a similar manner in any other applications involving other SWSPs or in any proposed renewal of this SWSP, and shall not imply concurrence with any findings of fact or conclusions of law contained herein, or with the engineering methodologies used by the Applicant. December 5, 2011 Page 6