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4) North Poudre Supply Canal (aka Munroe Gravity Canal) (Structure ID 0300905) <br />The North Poudre Supply Canal, also known as the Munroe Gravity Canal, was built as a Bureau <br />of Reclamation project as part of the C-BT project, sponsored by Northern Colorado Water <br />Conservancy District (NCWCD). In exchange for NCWCD funds, NPIC assumed the costs of <br />annual maintenance. <br />The Munroe Gravity Canal diverts from the south side of the Cache la Poudre River through a <br />tunnel located approximately 3 miles east of Poudre Park and directly upstream of the confluence <br />of the North Fork and mainstem Cache la Poudre River. The tunnel crosses the Cache la Poudre <br />River approximately 1 mile south of the Fort Collins Filtration Plant and continues for <br />approximately another 1 mile before it discharges into the predominately earth-lined, open <br />Munroe Gravity Canal. The Munroe Gravity Canal travels toward the northeast, carrying direct <br />flow, storage, and exchange water to the NPIC System. The Munroe Gravity Canal becomes the <br />Main North Poudre Supply Canal at the point where the No. 15 Bypass intersects the canal, south <br />of North Poudre Reservoir No. 15. The Main North Poudre Supply Canal continues east toward <br />Clark Reservoir and Indian Creek Reservoir. Laterals extending from the Main North Poudre <br />Supply Canal include Cheyenne Lateral, Cowan Lateral, and Cactus Hill Lateral. When the <br />canal was initially constructed, those sections underlain by loose rock were lined. The majority <br />of the ditch was originally and is still earth lined. <br />The Munroe Gravity Canal and its extensions pass over Campbell Springs, Park Creek, Coal <br />Creek, and Indian Creek. During flood conditions, flows may be intercepted from Park Creek, <br />Coal Creek, and Indian Creek. The canal intersects Dry Creek and Boxelder Creek, where it can <br />intercept flows by virtue of decreed water rights. Flows in Boxelder Creek can also be bypassed. <br />In 2004, construction of the Pleasant Valley Pipeline was completed. The pipeline is fed through <br />diversions through the Munroe Gravity Canal. The capacity of the pipeline is 160 cfs, however <br />Greeley currently diverts only about 20 cfs through the structure. <br />Direct flow water in the Munroe Gravity Canal is used predominantly for irrigation of lands <br />under the NPIC System. Munroe Gravity Canal direct flow water can also be used for storage, <br />municipal, commercial, industrial, recreation, fishery, fire, domestic, augmentation, and wild and <br />scenic river uses. Since spring 2004, diversions through Munroe Gravity Canal have included <br />carrier diversions to the Pleasant Valley Pipeline. <br />Length: From the Munroe Gravity Canal headgate on the Cache la Poudre River to Clark <br />Reservoir, the length of the Munroe Gravity Canal is approximately 23 miles. <br />Capacity: In 1973, the maximum daily diversion recorded through Munroe Gravity Canal was <br />398 cfs. However, NPIC reported that the current capacity of the Munroe Gravity Canal <br />is approximately 250 cfs and the Main North Poudre Supply Canal below the Reservoir <br />No. 15 outlet is 300 cfs. Daily diversion records back to 1989 support a reduction in <br />capacity of the Munroe Gravity Canal. <br />Measurement Device: Diversions through Munroe Gravity Canal are measured at a 10-foot <br />Parshall flume equipped with a Stevens A35 recorder. <br />NorthPoudreMemo.doc 13 of 29 <br />