2016-03-30_HYDROLOGY - M1986015 - Laserfiche WebLink

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Mr. Paul Bruss, P.E March 24, 2016 Page 3 of 6 Month Phasel Phase 2 Phase 7 1 49.15% 54.46% 76.62% 2 34.43% 36.62% 19.16% 3 11.76% 8.92% 4.22% 4 4.65% - - Historical phreatophyte and effective precipitation were determined to partially offset gross evaporation at the site. The credit from historical phreatophyte consumptive use was calculated to be 19.5 acre-feet per year from 5.6 acres of equivalent 100% canopy cover native vegetation in Phase 1, and 17.5 acre-feet per year from 5 acres of 100% canopy cover native vegetation in Phase 7. Effective precipitation was claimed on the remaining 26.4 acres of exposed surface area, and was calculated as 70% of precipitation. REPLACEMENT The replacement water is proposed to be from three sources. The first is excess credits from the Hamp-Bell Ditch water rights changed in Division 2 Water Court case no. 03CW8 and subject to the April 2004 agreement (amended March 2007) between Transit Mix and Pueblo Board of Water Works ("PBWW"). The second is consumable water leased from the PBWW. Transit Mix currently has a lease with Pueblo that will provide 120 acre-feet of fully consumable water annually through September 30, 2022. The third is 60 shares of Twin Lakes Reservoir water owned by Transit Mix that are primarily used for Transit Mix's Grisenti Pit under a separate SWSP (SWSP ID 4625), but typically provide excess water available for this SWSP, should it be needed. For purposes of this SWSP, only the transmountain component of the subject Twin Lakes Reservoir shares may be considered available to be used as a replacement supply herein. The excess credits from the Hamp-Bell Ditch water rights were changed in Division 2 Water Court case no. 03CW8 to commercial and augmentation uses. As decreed by the Division 2 Water Court in case no. 12CW102, PBWW obtained the right to store the Hamp-Bell Ditch credits changed in case no. 03CW8; therefore, Transit Mix is no longer responsible for replacing the winter return flow obligation associated with the Hamp-BeU Ditch water rights, and will only be entitled to use the net excess credits after full augmentation of Chain of Lakes depletions and replacement of winter delayed return flows, which will average approximately 10.0 acre-feet annually. The projected depletions, credits, and releases subject of this SWSP are shown on the attached Table 5. The State and Division Engineers have reviewed the plan and the adequacy of each source of water provided for use as augmentation water, including, where necessary, the historical consumptive use of each water right, and return flows from diversion of waters imported into the Arkansas River Basin or other fully consumable waters proposed for use as augmentation water. 1313 Sherman Street, Room 821, Denver, Co 80203 P 303.866.3581 F 303.866.3589 www.water.state.co.us John W. Hickenlooper, Governor i Robert Randall, Interim Executive Director