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discussed above, Larimer Weld Company satisfies this demand from a number of different <br />diversion structures and storage units. In the SPDSS modeling effort, Larimer Weld Company's <br />total demand will be modeled at the Little Cache la Poudre Ditch and the Larimer Weld <br />Irrigation Canal headgates which are able to receive water from the various infrastructure <br />components subject to the physical limitations (e.g., headgate capacity, canal capacity, storage <br />capacity) and legal limits (i.e., water rights) previously presented for those components. <br />At full water supply, one share of Larimer Weld Company is equivalent to 25 days of water at <br />1.44 cfs, or 72 acre-feet. <br />Storage water in ditch company reservoirs is used for irrigation on ditch company lands and <br />exchange with other irrigating companies in Water District 3. Ditch company reservoirs are <br />generally operated in an aggregate fashion with water stored in the upper reservoirs first, water is <br />released to the plains reservoirs when direct flow water rights do not provide sufficient supply, <br />once in the plains reservoirs storage water is moved between and among storage units in order to <br />maximize efficiency of available supplies. <br />Although there is a great amount of variability in the delivery of water to shareholders within any <br />irrigation ditch system, the following operations apply to the Larimer Weld System in a typical <br />year: <br />• Larimer Weld Company delivers water according to the following priority of sources, <br />with the objective of keeping water as high in the system as long as possible. <br />1. Direct Flow Rights, <br />2. Storage in lower reservoirs, <br />3. Transbasin Water, and <br />4. High Mountain Storage Releases. <br />• Winter through spring -Starting in November, water can be diverted from the Cache la <br />Poudre River for storage, when reservoir storage rights are in priority. Because a <br />majority of Larimer Weld Company reservoirs are lower in the system, Larimer Weld <br />Company will typically coordinate with other large irrigation companies to store its water <br />high in Water District 3. Big Windsor Reservoir is typically filled throughout the winter. <br />Because Big Windsor is lower in the Larimer Weld System, water stored in Big Windsor <br />Reservoir is typically exchanged with the New Cache Company through the Greeley No. <br />2 Canal. As spring run-off increases, the Larimer Weld Company will fill its plains <br />reservoirs. <br />• Early summer -Water is taken through the Larimer Weld System pursuant to Company <br />direct flow rights. C-BT releases are made to shareholders starting May 1 through three <br />different mechanisms. <br />1. C-BT water can be taken directly in the Poudre Valley Canal through the Windsor <br />Extension of the Hansen Supply Canal, <br />2. C-BT water released to the Cache la Poudre River can be taken directly through <br />Little Cache la Poudre Ditch or Larimer Weld Irrigation Canal, or <br />3. C-BT water can be used by exchange through releases from Fossil Creek <br />Reservoir. <br />• Late summer -Releases are made from the high mountain reservoirs to supplement <br />irrigation demands. C-BT deliveries also continue to be made if available. <br />Larimer&Weld Memo.doc <br />18 of 20 <br />