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the Poudre Plan and Central Replacement Plan and for exchange with Big Windsor Reservoir <br />and Windsor Lake. <br />Timnath Reservoir Outlet Canal flows into Greeley No. 2 Ditch approximately 1 mile down the <br />ditch. Flow through Greeley No. 2 is regulated by the use of Kern Reservoir (aka, Windsor <br />Lake), located downstream of the junction of Timnath Reservoir Outlet Canal and the main <br />ditch. Kern Reservoir is owned by the Kern Reservoir Company; however it is generally used by <br />the New Cache Company. Releases from Windsor Reservoir (aka, Big Windsor) enter the <br />T ~=, <br />Y~ r ~ <br />.~ <br />~"~> <br />.~ _ ~. ~~ ` M,~ ~ ate., . <br />Recently Reshaped Canal on <br />Lower End of Greeley No. 2 Ditch <br />new storage prof ect is currently in the works to <br />assist in flow equalization and storage for the <br />entire ditch. Construction of the new storage <br />project should begin in fall 2004. <br />In 1995, the diversion and measuring <br />structures were re-built to improve the <br />efficiency of the System. The new diversion <br />structure consists of a concrete structure with <br />2 radial gates, 2 Obermeyer gates, and an <br />ogee spillway. One of the two measuring <br />structures consists of a 25 foot weir in the <br />ditch downstream from the headgate. The <br />second measuring structure is located in the <br />river below the diversion structure and <br />consists of a concrete control section. <br />Length: Approximately 48 miles in length, consisting of three distinct ditch segments, 1) the <br />main ditch for the first 24 miles, 2) the North Side Lateral for the next 12 miles, and 3) <br />the North Side Extension for the last 12 miles. <br />Capacity: The capacity of Greeley No. 2 Ditch is approximately 650 cfs. <br />Measurement Device: Diversions through Greeley No. 2 Ditch are measured on the ditch <br />through a 25 foot parshall flume equipped with a Stevens recorder. An additional <br />measuring device is located downstream of the confluence of the Greeley No. 2 Ditch <br />and the outlet canal from Big Windsor Reservoir. This second gage is used internally for <br />operational purposes. <br />Conveyance Efficiency: In 2003, HRS performed a study on seepage in the New Cache <br />System. According to this study, typical ditch loss in the New Cache System is 15 <br />percent of river headgate diversions. According to the New Cache Company, more <br />seepage is likely to occur in the Greeley No. 2 Ditch at low flow and high flow. Return <br />flows from the Larimer and Weld Irrigation District to the north have the ability to off-set <br />the ditch seepage. <br />Return Flow Locations: Seepage from the Greeley No. 2 Ditch and irrigation return flows <br />accrue to the Cache la Poudre River and the South Platte River. Sand Creek is the <br />NewCacheMemo.doc 8 of 14 <br />