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<br />Pumping Plant lifts the water 175 feet. It then flows by gravity via the Willow Creek Feeder Canal <br />down to Lake Granby. <br /> <br />o <br /><:) <br />.... <br />c.o <br />t;) <br />C.il <br /> <br />Granby Pumping Plant lifts the water 99 feet from Lake Granby to Granby Pump Canal. The canal <br />conveys the water 1,8 miles to Shadow Mountain Lake, which also intercepts North Fork flows of <br />the Colorado River. Shadow Mountain Lake connects with Grand Lake to make a single body of <br />water from which diversions flow to Adams Tunnel to begin the journey to the eastern slope, <br /> <br />Emerging from Adams Tunnel into the East Portal Reservoir. the water flows across Aspen Creek <br />Valley in a siphon and then under Rams Horn Mountain through a tunnel. At this point, it enters a <br />steel penstock and falls 205 feet to Marys Lake Powerplant. This powerplant is located on the west <br />shore of Marys Lake, which provides afterbay and forebay capacity for re-regulating the flow. The <br />water is conveyed between Marys Lake and Estes PowerPlant, on the shore of Lake Estes, through <br />Prospect Mountain Conduit and Prospect Mountain Tunnel. <br /> <br />Lake Estes, which serves as an afterbay for the Estes Powerplant, is formed by Olympus Dam. The <br />storage in Lake Estes and the forebay storage in Marys Lake enable the Estes Powerplant to meet <br />daily variations in energy demand, <br /> <br />Water from Lake Estes and the Big Thompson River flows are conveyed by Olympus Siphon and <br />Tunnel, and Pole Hill Tunnel and Canal, to a penstock through which the water drops 815 feet to <br />Pole Hill PowerPlant. The flow is then routed through Pole Hill PowerPlant Afterbay, Rattlesnake <br />Tunnel, Pinewood Lake, and Bald Mountain Pressure Tunnel, and eventually dropped 1.055 feet <br />through two penstocks to Flatiron PowerPlant. This powerplant discharges into Flatiron Reservoir, <br />which regulates the water for release to the foothills storage and distribution system, The afterbay <br />storage in Flatiron Reservoir and the forebay storage in Pinewood Lake enable Flatiron PowerPlant <br />to meet daily power loads. <br /> <br />Southward, the Flatiron reversible pump/turbine lifts water from Flatiron Reservoir. a maximum of <br />297 feet, and delivers it through Carter Lake Pressure Conduit and Tunnel to Carter Lake, When the <br />flow is reversed, the unit acts as a turbine-generator and produces electrical energy. <br /> <br />The St. Vrain Supply Canal delivers water from Carter Lake to the Little Thompson River, St. Vrain <br />Creek, and Boulder Creek Supply Canal. The latter delivers water to Boulder Creek and Boulder <br />Reservoir. The South Platte Supply Canal, diverting from Boulder Creek. delivers water to the <br />South Platte River. <br /> <br />Northward, the Charles Hansen Feeder Canal transports water from Flatiron Reservoir to the Big <br />Thompson River and Horsetooth Reservoir, The canal crosses the Big Thompson River in a siphon <br />above the river and highway. Water from the Big Thompson River can be diverted into the canal by <br />Dille Diversion Dam and utilized for power generation at Big Thompson PowerPlant. <br /> <br />Project water deliveries and Big Thompson River water to be returned to the river are dropped <br />through a chute from the feeder canal ahead of the siphon crossing, or are passed through the Big <br />Thompson PowerPlant to convert the available head to electrical energy. <br /> <br />2 <br />