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'lG4J '\ ~'jr'~~ ) F-Cr . Storage in Trinidad Lake. Las Animas County. Colorado u.s. Army Corps of Engineers, dated September 1994, the initial filling shall only be made using waters imported into the Arkansas River basin from other river basins, either by direct importation or by exchange pursuant to the ~ laws of Colorado. The initial filling and the replacement of evaporation and seepage shall be made according to the following procedures: (a) All water rights on the Pur~atoire River downstream of Trinidad Reservoir V' will be satisfied during the period of any exchange; (b) Prior to any exchange, the specific source of imported or native water, as / limited by the Operating Principles for Trinidad Dam and Reservoir Project, as amended, will be verified by the Colorado State Engineer; (c) For each acre-foot of native water stored in Trinidad Reservoir by exchange, the Colorado Division of Parks will deliver an acre-foot ofIdentifiable Imported water, or native water whose consumptive use has been determined by final decree of the Colorado Water Court, to the Arkansas River at Las Animas gauging station; (.:' v (d) Transit losses between the source of supply for an exchange and the Las ~ Animas gauge will be determined and assessed by the Colorado State Engineer, using the "Livingston Method" or other suitable means, to assure that a "one for one" exchange is accomplished. . The Colorado State Engineer will report and account contemporaneously and annually to / the Arkansas River Compact Administration on the initial filling and replacement of evaporation and seepage in the permanent fishery pool. 2. In the accounting for water in storage, evaporation and seepage losses due to the /' permanent fishery pool shall be determined using the most recent data available by the Colorado State Engineer and the District with the cooperation of the operating agency. 3. There shall never be any release or transfer of water from the permanent fishery \./' !illQ/ excepting by necessity of dam safety or flood emerl?ency operations as determined by the Cows of Engineers. District Engineer. Article VI - REVIEW AND AMENDMENT These operating principles may be subject to review and amendment not more than once a year at the request of any of the parties' signatory; provided, that at least one review shall be accomplished within the first 10 years following completion of the Trinidad Dam and at least one review shall be accomplished every 10 years thereafter. The primary obiect of such reviews will be obtaining optimum beneficial use of water as conditions change, operating experience is gained, and more technical data become available. /' . 11