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The Timnath Reservoir Inlet Canal diverts water from the Cache la Poudre River for storage. <br />There is no irrigation under the inlet canal. Storage water in Timnath Reservoir owned by <br />stockholders of the New Cache Company is generally used for irrigation of lands within the New <br />Cache System located under Greeley No. 2 Ditch. In addition to being used for irrigation under <br />the New Cache System, Timnath Reservoir storage water is delivered to Lake Canal Ditch per its <br />stockholders ownership. <br />Timnath Reservoir is impounded by an earthen embankment with a rock face on two sides. The <br />reservoir spillway is located at the right shoulder of the outlet works and is cut into the natural <br />material. The spillway was constructed as part of the reservoir improvements conducted in 1977. <br />The outlet works consists of a slant gate located on the upstream face of the dam. Two tower <br />gates, located in the middle of the dam, control the discharge through the RCP outlet pipe to a <br />stilling basin located on the downstream side of the dam. From the stilling basin, water either <br />spills over an ogee crest to the weir measuring water to the Timnath Reservoir Outlet Canal or is <br />released through additional headgates to a weir that measures releases to the Lake Canal. <br />The Timnath Reservoir Inlet Canal (aka, Cache la Poudre Reservoir Inlet Canal) (Structure ID <br />0300924) headgate is located one mile downstream of the Fort Collins Wastewater Treatment <br />Plant No. 1 on the north side of the Cache la Poudre River. The unlined canal travels <br />approximately 7 miles in a southeasterly direction and terminates at the reservoir. The canal <br />crosses Dry Creek, Cooper Slough, and Boxelder Creek as it conveys water to the reservoir. <br />The design capacity of Timnath Reservoir Inlet Canal was originally 200 cfs. Over the years, the <br />capacity of the canal has decreased. The current capacity of the channel is a constraint on <br />storage. The New Cache Company is currently conducting a study on how to maximize the <br />design capacity of the inlet canal. There is no measurement device on the Timnath Reservoir <br />Inlet Canal. Diversion measurements are back calculated from the reservoir gage height. <br />There is one outlet from Timnath Reservoir. This outlet splits into two canals, Lake Canal Ditch <br />and Timnath Reservoir Outlet Canal, immediately downstream of the reservoir outlet structure. <br />Flows into Lake Canal Ditch and Timnath Reservoir Outlet Canal are measured by separate <br />parshall flumes. <br />New Cache System water is carried in the earth lined Timnath Reservoir Outlet Canal in a <br />southerly direction for approximately 3 miles, to a point in the southeast corner of Section 12, <br />Township 6 North, Range 68 West, where it intersects with Greeley No. 2 Ditch. The capacity <br />of Timnath Reservoir Outlet Canal is approximately 575 cfs. <br />Releases from Timnath Reservoir into the Timnath Reservoir Outlet Canal are measured through <br />a 12 foot parshall flume. A separate parshall flume is used to measure releases from Timnath <br />Reservoir into Lake Canal. These measurements are used by the New Cache Company for <br />operational purposes and are not reported by the State. <br />NewCacheMemo.doc 5 of 14 <br />