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 12 of 21 Replacement SummM The proposed depletions and replacements are shown in the attached "South Platte Combined Substitute Supply Plan Accounting 2019". 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 Poud re 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 Currently 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, 51 Et 6a 191 shares total Boyd Et Freeman Ditch' 240 shares, owned by City of Greeley Centenniala Perpetual lease, 30 acre-feet City of G reele ' Lease City of Longmont' Lease Goddin , Dailey Et Plumb Ditch 3 shares total Huett Seepage Ditch 100% ownership L.G. Everist' Lease Last Chance Ditch Co. No. 21 0.3154 shares total Left Hand Ditch Company shares total Leggett-Owens Reservoira 19.6 shares total Lupton Bottom Seep Ditches No. 1 Et No. 2a 100% ownership Platte River Power Authority Lease' Lease Silver Heights' Lease Smith Et Emmons Ditcha 1.5 shares total aThe 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. 'The 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 Et Freeman Ditch In the past, Aggregate has utilized 240 shares in the Boyd Et 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 Et Freeman Ditch shares will be claimed in this SWSP. Bergen Reservoirs 4, 5, Et 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 this office does not appear to have a copy of the report itself. Therefore this office is unable to determine the validity of the conclusions reached by the report. Prior to use of these shares as a replacement source, the Applicant must provide documentation to support the claimed net annual yield of 85 acre-feet and estimated average annual consumptive use of 15.8 acre-feet for these shares.