2019-08-27_HYDROLOGY - M1977436 - 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 7 of 21 year. The ditch-wide analysis utilized a return flow split of 50% surface and 50% subsurface return f lows. For the 2019 plan period, Aggregate will dedicate all 13.5 of their Whitney Ditch shares to this SWSP. For the purposes of this SWSP, the projected consumptive use credit has been estimated based on a dry-year farm headgate delivery of 24.75 acre-feet per share (which includes a 15% ditch loss) or approximately 334 acre-feet for all 13.5 shares. Actual deliveries, which were lower than projected deliveries, were used for the months of April and May 2019, resulting in a revised projected consumptive use credit of 314.57. After accounting for the return flow obligations, the total consumptive use credit for 2019 is projected to be approximately 157.92 acre-feet. Beginning in 2011, Aggregate utilized the Whitney Ditch West return structure (WDID 0302904) owned by the Whitney Irrigation Company located in the SE1/4 of Section 30, Township 6 North, Range 66 West, 6t" P.M. Aggregate anticipates that this return structure will be utilized again in 2019. A copy of the agreement authorizing Aggregate's use of this augmentation structure for the 2019 irrigation season, dated February 19, 2019, has been provided to this office. The dry-up locations for the subject Whitney Ditch shares were originally identified through an April 12, 2011 letter to the Division 1 Engineer. That letter stated the northern portion of Orr Farm #1 may continue to be irrigated using 1 of the 13.5 Whitney Ditch shares owned by the Applicant. In 2011 the entire Orr Ditch Farm #1 was removed from irrigation due to damage to the lateral serving the property. Therefore the entire farm is included as a dry-up location for all 13.5 shares dedicated to the plan in 2019. The share dedication dated February 29, 2012 remains valid and is attached. Bucklen Equipment Company Lease The Applicant has entered into an agreement with Bucklen Equipment Co., Inc. for the lease of excess augmentation credits from the Bucklen Pit SWSP (WDID 0302538) during the period of April through October 2019. A copy of the lease, dated December 12, 2018, is attached. The excess augmentation credits will be generated from six (6) Greeley Irrigation Company shares owned by the Bucklen Equipment Co., Inc. The return flow obligations associated with the use of the six Bucklen GIC shares are counted as a depletion in and will be replaced under the Bucklen Pit SWSP. After use in the Bucklen Pit SWSP, the shares are projected to produce a total of 61.83 acre-feet of excess credits during the 2019 irrigation season. Aggregate has leased the total estimated amount of 62.0 acre-feet of these excess credits for use in this SWSP. The Bucklen GIC shares will be delivered to the Cache La Poudre River at the 23rd Avenue and Fourth Street Return Station (WDID 0302318). Greeley Irrigation Company Shares The Applicant has obtained a lease for a total of three (3) shares in the Greeley Irrigation Company ("GIC") owned by Pat Arnold. A share of GIC water provides the shareholder with GIC direct flow water and Fossil Creek Reservoir water. The term of the lease is for the 2019 irrigation season. A copy of the lease, dated November 3, 2018, is attached. The share certificate numbers are #2476 (2 shares) and #2455 (1 share). The GIC owns a 5/8t" interest in the water rights decreed to the Greeley Canal No. 3 (WDID 0300934) and 60 preferred rights in Fossil Creek Reservoir (WDID 0303774). The historical use of 519.7 outstanding shares in the GIC was previously quantified and decreed in case no. 1996CW658 using a ditch-wide analysis. The decree in case no. 1996CW658 found that 519.7 shares were used to irrigate 3,501 acres (6.74 acres per share) with an average historical consumptive use of 5,358 acre-feet per year, which yields an average consumptive use credit of 10.31 acre-feet per share (5,358 acre-feet : 519.7 shares) or an average consumptive use credit of 1.53 acre-feet per acre.