2017-03-22_HYDROLOGY - M2001005 - Laserfiche WebLink

Home Browse Search

Mr. Paul Bruss March 22, 2017 Page 5 of 7 Commissioner and Division Engineer that confirms dry-up during the 2017 irrigation season. For 2018, the Applicant shall provide a written notification to the Water Commissioner and Division Engineer by March 15, 2018 identifying the lands to be dried-up for the 2018 irrigation season. By November 30, 2018, the Applicant shall provide an affidavit to the Water Commissioner and Division Engineer that confirms dry-up during the 2018 irrigation season. The historical consumptive use attributed to the changed surface water right(s) under this SWSP shall not include ground water contributions. As a result, the historical consumptive use (“HCU”) credit calculated for the subject water right to be changed by this SWSP shall be reduced by any ongoing sub-irrigation from ground water. In order to ensure the required dry-up conditions exist during the approval period of this SWSP, and to ensure no sub-irrigation from ground water is occurring, the Applicant shall provide records of monthly monitoring of depth to ground water for all land associated with the change of water right in this SWSP. Information regarding depth to ground water may be provided using existing irrigation wells, existing or new monitoring wells, or piezometers located on the dried-up fields. Applicant may utilize wells or piezometers located within ¼ mile of each field provided that the Applicant can demonstrate the depth to ground water information available off-site is representative of the depth to ground water on the dried-up land. The Applicant shall modify its accounting to reduce the amount of the calculated HCU that may be claimed in this SWSP according to the table below. 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 prior approval by the State Engineer and Division Engineer. (Construction of monitoring holes/wells, or piezometers requires that permits or notices be obtained as described in Table 1 of the Water Well Construction Rules.) Depth to Ground Water (Feet) Percent Reduction in Calculated HCU1 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 11. The approval of this SWSP does not relieve the Applicant and/or the landowner of the requirement to obtain a Water Court decree approving a permanent plan for augmentation or mitigation to ensure the permanent replacement of all depletions, including long-term evaporation losses and lagged depletions after gravel mining operations have ceased. If reclamation of the mine site will produce a permanent water surface exposing ground water to evaporation, an application for a plan for augmentation must be filed with the Division 2 Water Court at least three (3) years prior to the completion of mining, to include, but not be limited to, long-term evaporation losses and lagged depletions. If a lined pond results