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PHYSICAL INFORMATION <br />The major structural elements included in the City of Greeley's water resources system are <br />Milton Seaman Reservoir, Barnes Meadow Reservoir, other high mountain reservoirs <br />(Comanche Reservoir, Hourglass Reservoir, Twin Lake Reservoir, and Peterson Lake), Bellvue <br />Potable Treatment Plant, and Canal No. 3. The Boyd Potable Treatment Plant is a potable <br />treatment facility located on the southern end of Boyd Lake used by the City to treat its water <br />stored in Boyd Lake and Lake Loveland. These structures are located as shown in Figure 1. <br />Horsetooth Reservoir and Carter Lake Reservoir are also used to delivery water to the City of <br />Greeley. These storage units are owned and operated by the Bureau of Reclamation and are used <br />to generate power and to deliver transmountain water to various users in the Cache la Poudre <br />River, Big Thompson River, and South Platte River basins. Information related to these <br />infrastructure components are presented in the Task SMemorandum NCWCD and the CBT <br />System. The history, operations, and current specifications of the elements of Greeley's water <br />resources infrastructure are summarized below. <br />1) Milton Seaman Reservoir (Structure ID 0303713) <br />Milton Seaman Reservoir is an on-channel reservoir that was completed in 1945. The 108-foot <br />high earthen dam and reservoir were constructed on the North Fork Cache la Poudre River above <br />the City's Bellvue treatment plant, located as shown on Figure 1. Sediment deposited in the <br />reservoir from storm events and runoff during the mid-1980s reduced the storage capacity by <br />about 500 ac-ft. The dam had also deteriorated and was determined to be unable to pass the <br />probable maximum flood. The spillway was subsequently enlarged in the late 1990s (see Figure <br />2). Greeley is currently participating in a prof ect with the City of Fort Collins and other Cache la <br />Poudre River basin water users that would include an enlargement of Milton Seaman Reservoir. <br />Specifics regarding Milton Seaman Reservoir include: <br />• 5,008 ac-ft total capacity <br />• Maximum surface area of 146 acres <br />• Approximately 800 ac-ft dead <br />storage <br />Seepage losses from the reservoir are <br />considered low due to the bedrock <br />material at the bottom of the <br />reservoir. The Water Commissioner <br />does not charge the City for <br />evaporative losses from the reservoir. <br />An elevation-capacity curve for the <br />reservoir was provided by the City of <br />Greeley. A subset of points from the <br />curve is provided in Table 1. <br />Page 4 of 21 <br />Figure 2 -Milton Seaman Dam Rehabilitated Spillway <br />http://www.ecih2o.com/PROJECTS/DAMSFTYproj/MSeaman.htm <br />