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Mr. Rick Parsons, P.E. February 10, 2016 <br /> L.G. Everist Combined SWSP <br /> Page 12 of 14 <br /> The historical consumptive use attributed to the changed surface water right(s) under this SWSP <br /> shall not include ground water contributions. As a result, the historical consumptive use <br /> ("HCU") credit calculated for the subject water right to be changed by this SWSP shall be <br /> reduced by any ongoing sub-irrigation from ground water. In order to ensure the required dry- <br /> up conditions exist during the approval period of this SWSP, and to ensure no sub-irrigation from <br /> ground water is occurring, the Applicant shall provide records of monthly monitoring of depth to <br /> ground water for all land associated with the change of water right in this SWSP. Information <br /> regarding depth to ground water may be provided using existing irrigation wells, existing or new <br /> monitoring wells, or piezometers located on the dried-up fields. Applicant may utilize wells or <br /> piezometers located within '/a mile of each field provided that the Applicant can demonstrate <br /> the depth to ground water information available off-site is representative of the depth to <br /> ground water on the dried-up land. The Applicant shall modify its accounting to reduce the <br /> amount of the calculated HCU that may be claimed in this SWSP according to the table below. <br /> Measurements taken at the start of each month will determine the necessary reduction in credit <br /> to be applied during the following month. The Applicant may use another methodology upon <br /> review and prior approval by the state engineer and division engineer. (Construction of <br /> monitoring holes/wells, or piezometers requires that permits or notices be obtained as <br /> described in Table 1 of the Water Well Construction Rules.) <br /> Depth to Ground Percent Reduction in CU Credit' <br /> Water (Feet) <br /> Native Grass Alfalfa <br /> 1 85% 100% <br /> 2 50% 90% <br /> 3 30% 75% <br /> 4 20% 50% <br /> 5 15% 35% <br /> 6 10% 20% <br /> 7 5% 15% <br /> 8 0% 1 10% <br /> 1. Adapted from EVAPOTRANSPIRATION AND AGRONOMIC RESPONSES IN FORMERLY IRRIGATED <br /> MOUNTAIN MEADOWS, South Park, Colorado, March 1, 1990; Revised September 1, 1991 <br /> 15. This substitute water supply plan may be revoked or modified at any time should it be <br /> determined that injury to other vested water rights has or will occur as a result of this plan. <br /> Should this supply plan expire without renewal or be revoked prior to adjudication of a <br /> permanent plan for augmentation, all use of ground water must cease immediately. <br /> 16. If reclamation of the mines at the gravel pit sites included in this SWSP produce a permanent <br /> water surface exposing groundwater to evaporation, an application for a plan for augmentation <br /> must be filed with the Division 1 Water Court at least three years prior to the completion of <br /> mining to include, but not be limited to, long-term evaporation losses. If a lined pond results <br /> after reclamation, replacement of lagged depletions shall continue until there is no longer an <br /> effect on stream flow. <br /> 17. Dewatering at the Carbon Valley Pit, Rinn Valley Pit, and Firestone Pit will produce delayed <br /> depletions to the stream system. As long as the pits are continuously dewatered, the water <br /> returned to the stream system should be adequate to offset the depletions. However, once <br /> dewatering at the sites cease, the delayed depletions must be addressed. A plan that specifies <br />