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Page 5 rehabilitated by the Leach family, the prior owners of the reservoir, and used as a storage location for augmentation supplies in accordance with the Decree in Case No. 80CW194. The District purchased the Smelter Pipeline Reservoir in 2005, and the reservoir has been empty since the fall of 2008. In 2006 and 2007, the reservoir was filled in the springtime. The District proposes improvements to the Smelter Pipeline Reservoir to return its water storage function. By filling in a portion of the reservoir and deepening the rest of it, the modified reservoir would have a reduced surface area of 3.39 acres with an expanded storage capacity of 28 af. Specific project activities would include removing sediment and debris from the slopes and bottom of the reservoir to increase the storage capacity, recontouring the existing reservoir and installing a geomembrane liner below the reservoir, filling the western portion of the reservoir below the ordinary high water mark with excess fill; and installing a buried relief pipe and/or cutoff wall on the western edge of the reservoir. As a result of the project improvements, the modified Smelter Pipeline Reservoir would have a different footprint, but still within the existing footprint of the reservoir. As part of the overall improvements at the Smelter Pipeline Reservoir, the District also proposes improvements to the inlet and outlet structures. The existing inlet pipe and outlet valve would be evaluated, and then depending on conditions, would be repaired or replaced. A new staff gauge and flow meter vault would be installed. A 6 -inch perforated pipe also would be installed along the existing water release ditches to allow for both summer and winter releases. The existing inlet pipe would be extended into the new reservoir footprint. The District's boundaries are Park County; hence, the water that would be stored in the reservoir can be used within Park County. Since the District has other water rights in various locations within Park County, the primary uses for the water stored in the Smelter Pipeline Reservoir are anticipated to be within the Middle Fork of the South Platte River upstream of Spinney Mountain Reservoir. The District is not a municipal water provider; its primary use of the Smelter Pipeline reservoir would be as an augmentation water storage structure. Currently, the reservoir is not included within the District's countywide augmentation plan, and it has no customers that would use augmentation water from the reservoir. That is anticipated to change over time as the District adds customers to its augmentation plan and the reservoir is incorporated into the Plan. The only existing use of the Smelter Pipeline Reservoir for augmentation was adjudicated in Case No. 80CW194, District Court, Water Division No. 1, where the reservoir structure is the augmentation pond for the Adventure Placer Subdivision in Park County. The 80CW194 augmentation plan was adjudicated by the Leach family. When the District acquired the Smelter Pipeline Reservoir in 2005, it assumed the obligation to operate the 80CW 194 augmentation plan as part of its purchase. The 80CW194 Decree provided that, at full build - out, 2.28 of per year of augmentation water was to be stored in the reservoir to be released to Mosquito Creek, which is tributary to the South Platte River, during the non - irrigation season.