2019-08-27_HYDROLOGY - M1989120 - Laserfiche WebLink

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Amended Aggregate Industries South Platte Combined SWSP August 27, 2019 Plan I Ds 3614, 47731 3624, 47721 4616, 3437, 3376, 3650, 3668, and 5475 Page 18 of 21 15. The name, address, and phone number of a contact person who will be responsible for the operation and accounting of this plan must be provided to the Water Commissioner(s) and the Division Engineer. 16. Subject to prior approval by the division engineer, the Applicant may lease or purchase additional replacement water as identified in this SWSP request. Such additional sources of replacement water may only be used in this SWSP if the Applicant complies with the attached Division One Administration Protocol "Use of Replacement Sources Not Specifically Identified in an SWSP or Augmentation Plan". 17. The Applicant shall perform an inspection and provide verification that the land associated with the changed water rights in this SWSP has been removed from irrigation during the term of this SWSP. Verification of dry-up must be in the form of an affidavit signed by an individual with personal knowledge of the dry-up for the entire irrigation season for each parcel of land associated with each change of water right in this SWSP. In accordance with the attached "Administration Protocol - Dry-Up of Irrigated Land", by October 31, 2019, the Applicant shall provide an affidavit to the water commissioner and division engineer that confirms dry-up during the 2019 irrigation season. A GIS shapefile outlining the dry-up must accompany each affidavit and be emailed to DNR DivlAccounting2state.co.us. The shapefile shall include the pending court case number, the WDID of the plan, a delineation of the dried-up land, the acreage of dry-up, and any accompanying metadata. In addition, the datum must be NAD83 and the UTM projection must be Zone 13. If a shapefile of the acreage was provided previously and the proposed dry-up acreage has remained the same, the notice can reference the previously provided shapefile, rather than providing it again. If the actual dry-up does not match the land proposed for dry-up in the spring, a revised GIS shape file must be submitted with the affidavit in the fall. The historical consumptive use attributed to the changed surface water right(s) under this SWSP shall not include groundwater contributions. As a result, the historical consumptive use ("HCU") credit calculated for the subject water right(s) to be changed by this SWSP shall be reduced by any ongoing sub-irrigation from groundwater. In order to ensure the required dry-up conditions exist during the approval period of this SWSP, and to ensure no sub-irrigation from groundwater is occurring, the Applicant shall provide records of monthly monitoring of depth to groundwater for all land associated with the change of water right(s) in this SWSP. Information regarding depth to groundwater 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 '/ mile of each field provided that the Applicant can demonstrate the depth to groundwater information available off-site is representative of the depth to groundwater 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.)