2013-03-28_HYDROLOGY - M1999050 - 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. Todd Williams Timnath - Connell SWSP March 27, 2013 Page 5 (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 13. Adequate accounting of depletions and replacements must be provided to the division engineer in Greeley (Div1Accountinq(a state.co.us) and the water commissioner (mark.simpsonstate.co.us) on a monthly basis. All amounts shall be in acre -feet. All submitted accounting shall conform to the Administration Protocol "Augmentation Plan Accounting, Division One — South Platte River" (attached). 14. The name, address, and phone number of the contact person who will be responsible for the operation and accounting of this plan must be provided on the accounting forms submitted to the division engineer and the water commissioner. 15. Monthly excess recharge credits are dedicated to the SerFer Pit as their primary replacement water source. Submitted accounting must adequately show the monthly amount as a depletion to the Timnath - Connell Pit. As the Applicant owns both the SerFer and Timnath- Connell Pits, combined accounting is acceptable. 16. This substitute water supply plan may be revoked or modified at any time should it be determined that injury to other vested water rights has or will occur as a result of this plan. Should this supply plan expire without renewal or be revoked prior to adjudication of a permanent plan for augmentation, all use of ground water must cease immediately. 17. If reclamation of the mine site 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 approval by this office of any such court application(s).