2011-08-10_HYDROLOGY - M1984040 - Laserfiche WebLink

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Pete Conovitz August 10, 2011 Page 3 of 5 depletions from the 8.5 -acre pond was calculated using the Integrated Decision Support Alluvial Water Accounting System ( "IDSAWAS ") model with the 7 -day SDF option starting in water year 1997 and going through the end of October 2011. Replacement Sources CDOW owns one share of the Jackson Lake Reservoir and Irrigation Company Stock which will be used to replace irrigation season depletions. This share was one of the two shares changed to augmentation in case no. W- 8561 -77. This share has not been used at the location described in case no. W- 8561 -77 since CDOW acquired the property and share in 1983. The decree in case no. W -8561- 77 states that the "Jackson Lake Private Right yields an average of 16 acre -feet of water per year per right and the historical consumptive use of this water for irrigation purposes has been 50% of the delivered amount, so that the Applicant is entitled to the amount of consumptive use or 16 acre -feet for the two rights combined ". Thus the consumptive use amount for CDOW ownership of one share is 8 acre -feet. Jackson Lake Reservoir is located 30 miles upstream of Chartier Pit; therefore transit losses of 0.5% per mile were included in the depletion calculation. CDOW is proposing an aggregate release of the Jackson Lake Reservoir water during the irrigation season to replace irrigation season depletions. The release of replacement water from Jackson Lake Reservoir may be aggregated to maximize beneficial use; however, the rate and timing of an aggregated release shall be determined by the water commissioner and/or division engineer. According to paragraph 5(c)I of the water court application in case no. 2006CW229, CDOW may utilize augmentation credits from the Riverside Irrigation District or water available from another plan for augmentation. You indicated that in 2009 CDOW acquired a 20% interest in the Goodrich Farms recharge and augmentation plan decreed in case no. 90CW10 (W- 2919). Therefore for the purpose of, this SWSP, CDOW intends to utilize augmentation credits from Goodrich Farms recharge and augmentation plan to replace the winter months depletions. These credits accrue to the South Platte River in approximately the same location as the Jackson Lake Inlet Canal water. The attached Table 4 shows the proposed accounting of the Goodrich Farms augmentation credits which will be used to replace the Chartier Pit winter month depletions. Conditions of Approval This SWSP is hereby approved pursuant to C.R.S. § 37- 92- 308(4), subject to the conditions stated below: 1. This SWSP shall be valid for the period of July 1, 2011 through June 30, 2012, unless otherwise revoked, modified, or superseded by decree. The initial date of approval for this SWSP was November 28, 2007 for operation beginning July 1, 2007. Pursuant to § 37- 92- 308(4)(b), C.R.S., "If an applicant requests renewal of a plan that would extend the plan past five years from the initial date of approval, the applicant shall demonstrate to the water judge in the applicable water division that the delay in obtaining a decree has been justifiable and that not being able to continue operating under a substitute water supply plan until a decree is entered will cause undue hardship to the applicant." This SWSP will not be approved for the 2012 — 2013 period unless we receive evidence from the court that the applicant has met this requirement. Additional SWSPs are required until a court decreed plan for augmentation is obtained for the proposed uses. Should an additional SWSP be requested, the provisions of § 37 -92- 308(4), C.R.S., shall apply. The statutory fee of $300 will be required pursuant to § 37- 92- 308(8), C.R.S. Any request for an additional SWSP must be submitted to this office no later than March 31, 2012.