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. . . Holbrook's reservoirs. The Holbrook Canal has direct flows and storage water rights and it participates in the winter storage program. Holbrook's reservoirs generally fill every year. The Fort Lyon and Holbrook by-laws do not allow carryover storagl:l by shareholders; therefore, CWPDA will need to obtain by-laws changes in both companies. The best option probably would be to acquire the Holbrook Canal as the primary supply and acquire the right to store water in Fort Lyon's Adobe Creek Reservoir. Another option is for CWPDA to promote the increased use of Fry-Ark Project water as a means of decreasing well pumping. An analysis was performed to determine the impact a reduction in irrigation well pumping and increase in Fry-Ark diversions had on stream depletions and Fry-Ark return flows. The analysis included only those ditches on the Arkansas River that historically have taken Fry-Ark Project Water and assumed only CWPDA members would participate. The analysis assumed that well pumping would be replaced by Fry-Ark Project water delivered to the irrigator in the same amount as the reduction in well pumping. The cessation of pumping would result in a 0.36 acre-foot reduction in stream depletions. The additional Fry-Ark diversion would generate 0.49 acre-foot of return flow of which CWPDA should be entitled to 0.22 acre-foot. The option makes economical sense. It reduces the amount of water CWPDA needs to purchase and generates additional inexpensive augmentation water. Depending upon the cost of purchasing water, the cost savings can be from $4 to $70 per acre-foot. Then:l are several institutional and personal preferences inhibiting' this option. They include irrigators who like the independence and convenience of turning wells on and off, and most canal companies do not make specific deliveries to individuals under their canal. It is recommended that this option be explored with CWPDA members, SECWCD, and a specific canal company. It is in CWPDA's best interest to encourage Arkansas River ditch companies to increase their diversion of Fry-Ark Project water. If CWPDA decides not to go forward with the above option,at the very least CWPDA should approach selected ditch companies and try to develop mutually beneficial plans for increasing diversions. Proposed Auamentation Plan This study analyzed CWPDA's well pumping, stream depletions, and 27 different sources of replacement water. It is opined that the replacement sources listed in Table 1-3 would provide the best combination to offset CWPDA depletions during an average period. CWPDA: Sec I 10/19/99 Page 7 .