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Aggregate Industries South Platte Combined SWSP January 30, 2019  <br />Plan IDs 3614, 4773, 3624, 4772, 4616, 3437, 3376, 3650, 3668, and 5475 Page 11 of 21  <br /> <br />shares for 2018 has been estimated from a dry-year farm headgate delivery of 2.64 acre-feet per  <br />share or approximately 164 acre-feet for all 62 shares. After accounting for return flow obligations,  <br />the total consumptive use credit for the 62 shares is projected to equal 110.97 acre-feet in 2019. In  <br />the event the Fulton Ditch goes into Sections, the Applicant has sufficient alternative replacement  <br />supplies in the form of shares in the Brighton Ditch, as described below, to make up any temporary  <br />shortfalls.  <br />Brighton Ditch  <br />Pursuant to a March 4, 2010 Water Lease with the City of Westminster, Aggregate has the  <br />right to use 1.038 shares in the Brighton Ditch Company owned by the City of Westminster for  <br />augmentation purposes. The lease is currently valid through March 4, 2020. The subject 1.038  <br />shares were changed in case no. 2016CW3186 from irrigation use to direct flow and storage or all  <br />beneficial uses of the municipal water system of Westminster. The use of the subject shares for  <br />replacement purposes in this SWSP was not decreed in case no. 2016CW3186; however, the decree  <br />entered in case no. 2016CW3186 included a provision that Aggregate’s continued use of the subject  <br />shares be governed by the terms and conditions of the decree. The decree entered in case no.  <br />2016CW3186 relied on a parcel-specific analysis of the historic consumptive use of the subject water  <br />rights, with a study period of 1950 through 2001. The total shares include 4/6​th​ (0.667) of a share  <br />historically used to irrigate the Broncucci (aka Wattenberg) Property. An average of 42 acres of  <br />pasture grass were irrigated by controlled flood irrigation. The engineering study commissioned by  <br />Westminster for case no. 2016CW3186 found the average historical consumptive use for the 0.667  <br />Brighton ditch shares used on the Broncucci Property to be 82.5 acre-feet. <br />The other 0.371 shares were historically used to irrigate the Haake Property, along with 5.75  <br />shares of the New Brantner Extension Ditch Company. Irrigated portions of the Haake Farm ranged  <br />from 92.3 to 111.8 acres from 1950-2001. During the study period, between 10.7 and 11.3 acres of  <br />dry beans (prior to 1960) and corn (1960 on) were irrigated by the Brighton Ditch shares only; 20  <br />acres of pasture grass and between 14.2 and 20.1 acres of dry beans (prior to 1960) and corn (1960  <br />on) were irrigated by the New Brantner Ditch shares only; and between 49 and 61 acres of furrow  <br />irrigated corn and flood irrigated pasture grass were irrigated by both the combined Brighton Ditch  <br />and New Brantner Ditch water supplies. The engineering study commissioned by Westminster for  <br />case no. 2016CW3186 found the average historical consumptive use attributable to the 0.371  <br />Brighton Ditch shares used on the Haake Property to be 67.85 acre-feet.  <br />The total average historical consumptive use for the subject 1.038 shares is therefore 150.35  <br />acre-feet per year (144.85 acre-feet per share). Aggregate will utilize the entire 1.038 shares for use  <br />in this plan. The use of the Brighton Ditch shares in this plan must comply with the terms and  <br />conditions of the 2016CW3186 decree, including the volumetric limits identified in paragraph 35.D of  <br />the decree and summarized in the table below.   <br />  <br /> Apr May Jun Jul Aug Sep Oct Annual  <br />Max Monthly and Annual Limits 59.7 96.3 96.3 106.6 97.8 56.8 52.3 458.0  <br />20-Year Limits 458 1,073 1,355 1,598 1,375 879 425 7,163  <br />  <br />For the purposes of this SWSP, you have estimated the expected credit for the Brighton Ditch  <br />shares from a dry-year farm headgate delivery (using a 25% ditch loss, consistent with case no.  <br />2016CW3186) of 334 acre-feet per share, or 343.60 acre-feet for all 1.038 shares for the period of  <br />April through October. This amount is less than the 20-year average annual limit of 358.15 acre-feet  <br />(7,163 acre-feet ÷ 20 years), and therefore is acceptable.