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Ms.Megan Gutwein August 16,2019 Page 17 of 25 purpose of this operation is to avoid the construction of recharge ponds,which the Super Ditch and Colorado Springs believe will simplify this and future alternative transfer method projects. 4. Operations Projections indicate up to 1,928.8 acre-feet of irrigation season stream depletion credits (consisting of 1,123.7 acre-feet of the historical consumptive use credit and 805.2 acre-feet of lagged deep percolation return flows, will be allocated to Colorado Springs during a year of average farm headgate deliveries (see Appendix I, Table 1. The 1,928.8 acre-feet of irrigation season stream depletion credit may be exchanged to Pueblo Reservoir for delivery to Colorado Springs. The dry- year (2002) irrigation season stream depletion credit is estimated at 428.7 acre-feet and the wet year (1996) irrigation season stream depletion credit is estimated at 2,550.4 acre-feet, including both consumptive use and lagged deep percolation return flows. Note that deliveries for Colorado Springs per the Pilot Project will cease when 1,000 acre-feet of consumptive use is delivered to Pueblo Reservoir. B. Exchanges Several exchanges have been discussed in the above operations section of this report, though not all of these exchanges may be necessary for the proposed operations. For example, stepped exchanges will only be necessary when insufficient exchange potential is available to exchange the depletion credits to Pueblo Reservoir. Exchanges that may be operated as part of the Colorado Springs/Super Ditch Pilot Project include the following exchange reaches. • Timpas Creek and Arkansas River Confluence to Pueblo Reservoir. • Crooked Arroyo and Arkansas River Confluence to Pueblo Reservoir. • Stepped exchanges may also occur from the Timpas Creek and Arkansas River Confluence,the Crooked Arroyo and Arkansas River Confluence for storage in Lake Henry and Lake Meredith, or the Holbrook Canal for storage in Dye Reservoir and/or Holbrook Reservoir. The stored water will be subsequently released from these reservoirs and exchanged from the reservoir's points of delivery to the Arkansas River to Pueblo Reservoir. • Stepped exchanges may also occur to and from other diversion and delivery points located in the reach from the Crooked Arroyo confluence with the Arkansas River to Pueblo Reservoir. In evaluatingthe potential for operatingthe above-described exchanges,we have reviewed the work conducted by Martin and Wood Water Consultants (M&W) in support of Case No. 10CW04 (Division 2 Water Court). That work indicates that there is Arkansas River exchange potential to support further exchanges from the Catlin Canal to Pueblo Reservoir. We have also reviewed the expert report, dated September 2, 2014 prepared by the Wilson Water Group in support of Southeastern Colorado Water Conservancy District's application of rights of exchange in Case No.06CW08 (Water Div. 2). That report also indicates that exchange potential exists at times from the Catlin Canal to Martin and Wood Water Consultants,Inc.