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South Platte Combined Replacement Plan March 1, 2017 Page 10 of 19, ditch loss of 25% for the Brighton and 20% for the New Branter, and irrigation efficiencies of 65% for the furrow irrigated corn and dry beans and 50% for the flood irrigated pasture grass, the average historic consumptive use for the 0.371 Brighton Ditch shares was found to be 74.19 acre-feet. Aggregate will utilize the entire 1.038 shares for use in this plan. The expected credit for the Brighton Ditch shares has been estimated from a dry -year farm headgate delivery (using a 25% ditch loss) of 334 acre-feet per share, or 347 acre-feet for all 1.038 shares. Return flows consist of surface return flows, which are based on current deliveries, and subsurface return flows which are based on the previous year's total deliveries. The total consumptive use credit in 2017 is projected to equal 220 acre-feet, which is greater than the dry -year yield because of the reduced subsurface return flow obligation requirement resulting from low deliveries in 2016. The proposed depletions and replacements are shown in the attached "South Platte Combined Substitute Supply Plan Accounting 2017". The transit loss for each stream was estimated as 0.5% per mile for the South Platte River and 0.25% per mile for the Poudre River. The stream miles for each source is found on the Transit Loss spreadsheet submitted as part of the Applicant's accounting. Additional Water Supplies _ Not Authorized for Use in this SWSP The Applicant owns or has/may obtain the right to use the following additional water supplies, which are not currently included as authorized replacement sources in this SWSP. The details of each source are provided herein solely for informational purposes. Source Comments Bergen Reservoirs 4, 5, & 6" 190 shares total Boyd ft Freeman Ditch D 240 shares, owned by City of Greeley CentenniaV Perpetual lease, 30 acre-feet City of Longmont Lease Godding, Dailey Et Plumb Ditch 3 shares total Huett Seepage Ditch a 100% ownership Last Chance Ditch Co. No. 2 0.3154 shares total Left Hand Ditch Company" 4 shares total Leggett -Owens Reservoir" 19.6 shares total Lu ton Bottom Seep Ditches No. 1 Ft No. 2' 100% ownership Platte River Power Authority Lease Lease Silver Heights Lease Smith ft Emmons Ditch" 1.5 shares total eThe use of these sources for replacement purposes will only be allowed pursuant to a request for a new SWSP that provides the necessary additional information detailed for each source in our letter of December 8, 2014, and summarized below. 6The Applicant must provide a copy of a lease/purchase agreement to the State Engineer's Office and the division engineer for use of such additional replacement water prior to its use as a replacement source under this SWSP. In addition, this source 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". Boyd & Freeman Ditch In the past, Aggregate has utilized 240 shares in the Boyd Ft Freeman Ditch Company currently owned by the City of Greeley. Aggregate is currently in discussions with Greeley on the continued use of these shares in this SWSP. Until approval for their use is given by Greeley, no credit from the Boyd ft Freeman Ditch shares will be claimed in this SWSP. Bergen Reservoirs 4, 5, Ft 6 This office located the reference to the December 29, 1986 report prepared by KKBNA Incorporated consulting engineers in the July 13, 1990 SWSP request for the Thornton Pit; however Office of the State Engineer 1313 Sherman Street, Room 821, Denver, CO 80203 P 303.866.3581 www.water.state,co.us 'iti87G