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I I I I I I I I I I I I I I I I I I I share. So, more or less 1,120 acre feet of late season water is available within the Lake Canal service area. Colorado Bia Thompson Proiect IC-BTl Water Riahts At the present time, Lake Canal shareholders own approximately 1,684 units of Colorado Big Thompson (C-BT) project water. However, it is anticipated that all C-BT units will eventually be turned over to potable water purveyors and will not be available to meet the late season water needs within the Lake Canal service area. For this reason no C-BT water is considered in the analytical model for Lake Canal. Well Water Riahts There are approximately 32 wells in the Lake Canal service area that are owned by various shareholders. Most of the wells are augmented wells in the Poudre Plan. It is known that some wells are Coffin wells2, which are court decreed as non-tributary wells. In early 2003, the company initiated a questionnaire and information sheet, which was mailed to Lake Canal Company shareholders along with their assessments. The purpose of this questionnaire was to determine which farms in the Lake Canal service area have wells and to obtain permit and decree data for the wells. Also in 2003, wells were located using a handheld GPS unit. A total of 32 wells were mapped and are now shown on the Figure 2 service area map. Under the secondary supply scenario, it is presumed that wells will continue to be used as a source for secondary water supply on the decreed properties. In other words, the wells, whether tributary or non-tributary wells, would continue to be used on the properties for which they are decreed, which allows for more flexibility in allocating the remaining surface water dedicated to secondary supply under the Lake Canal system. Water Riahts Summary Table 1 summarizes the present water right ownership of Lake Canal shareholders and the average (normal year) yields of those rights. Note that C-BT units that have been important in the past are presumed to have no yield as far as the Lake Canal secondary supply system is concerned because these units will likely be turned over to the potable water purveyors to meet their water turnover requirements for potable water. It is hoped and presumed that the native water rights will stay within the service area for future use in landscape irrigation under the Lake Canal secondary supply system. Even now, some of these water rights are being sold for use in potable water systems or for augmentation plans. One of the positive elements of secondary supply is that there will be a sustainable market for the native water supplies and this water may continue to be used for irrigation without a water court proceeding. 2 It should be noted that an attempt to move or change the decree for a Coffin well makes it subject to potential loss of Coffin well status. Coffin wells can be redrilled if the relocated well is still in close proximity to the original well. Aqua Engineering, Inc. June 7, 2004 Canal Modernization Feasibility Study - 5-