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I I I I I I I I I I I I I I I J ,'''it'':" ''t ",:;"".vProject computed return flow is to be considered available to meet the above operating condition. The 1961 water supply study contemplated, and was heavily dependent upon, transfer of the 20,000 acre-foot Model Reservoir storage decree to Trinidad Reservoir. In addition, the individual ditch direct flow rights of the existing independent irrigations system that would participate i~ the Project were to be integrated into the project and administered by the Oistrict. Also, the study assumed that all project participants would share equally in the prOject water supply. The concept of equal sharing of project water was unacceptable to the District Board and they requested that the project operation studY be modified to recognize and give some advantage to those individuals holding the most senior water rights and the Model land and Irrigation Company who was providing the storage right.l/ The Bureau modified the 1961 Operation Study and redrafted the operating prin- ciples as a result of the District's concern. This modified operation study was developed showing water supply available to each ditch with. Model land and Irrigation Company having priority to certain storage and use of project water. Resu lts of th i s study were presented in Appendi x A Supp 1 ement, revi sed Water Supp 1y and Ut i1 i zat i on, Apr i1 1964, hereafter referred to as the "1964 Study." Following a review by others of the 1964 Study and proposed operating prin- ciples, the Bureau received a letter from the Governor of Kansas (dated December 3D, 1966) stating approval of the operating principles providing five additional conditions were added as follows: 1. All inflows over establ ished Colorado water rights 0156.05 cfs) be designated flood flows and released as promptly as downstream conditions permit. The only time water so des i gnated may be stored in the conservat i on pool will be when John Martin Reservoir does not have the capacity to store additional water. 2. Any subsequent amendment of the operating principles should be subject to review and approval of the ,same interests as provided for in the original procedure. 3. Assurances that there will be no significant increase in water use which would result in a depletion of water yield to other Colorado and Kansas water users. 4. That 5 years after beginning operation of the Trinidad Reservoir for irrigation purposes, the operating principles be reviewed to determine the effect, if any, the operation has had on other Colorado and Kansas water users and the principles amended as necessary. Each 10 year thereafter reviews should be provided with amend- ments as needed. 1!In late 1966, the District contracted with one participant - Hoehne Ditch Company - to deliver 95% of irrigation requirements of 1,200 specified acres. 3