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This Guideline is superseded by "Guideline 2019-03 - Reservoir Accounting Guideline" COLORADO Division of Water Resources Dep yrtment of Nabwal Rewurm RESERVOIR ACCOUNTING GUIDELINE Division of Water Resources Division One — South Platte River This Guideline addresses issues of accounting for stored water. The guideline describes how the Division Engineer for Water Division One (the "Division") intends to administer reservoir operations so as to confirm that vested water rights are not impacted by the reservoir. It serves as a guide to reservoir administration when decrees do not specifically address the issue of accounting. It is based upon the system of prior appropriation and the doctrines of vested rights and maximum beneficial use. While this guideline is subordinate to any decree language addressing specific accounting requirements, it generally addresses the minimum standards the Division Engineer requires for such accounting. Annual Operations The Division uses a single, twelve-month period to administer the storage of water. Unless otherwise specified by decree or approved by the Division Engineer, the twelve-month period begins on November 1 and ends the following October 31. The start of the twelve-month period, once set, will not be changed from year to year. Exempt Reservoirs 2. The Division Engineer or Water Commissioner may issue a written determination that certain reservoirs or reservoir operations, such as irrigation only reservoirs where water is stored and then released solely for the purpose of irrigation, regulating reservoirs, or other reservoir operations specifically identified by the Water Commissioner, should not be subject to these Guidelines. General Data Requirements 3. The purpose of a reservoir is to store water for later use, generally in accordance with a decree of the court. In order to properly account for the volume of water allowed into storage and the amount of water that must pass through the reservoir, the Division requires the information listed below to be recorded on a daily basis and submitted to the Division at least monthly: a. The volume of releases under the dominion and control of the reservoir owner/operator. For the sake of brevity, this data will be referred to as the "controlled release". b. The volume of water in storage. This is accomplished by a single stage (gauge rod) reading and referring to a stage -area -capacity table that is specific to the reservoir for determining capacity. The daily stage can be read manually or by a recorder, although it should occur at the same time every day to reflect a true daily (24 hour) value. November 14, 2018 Page 1