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<br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br /> <br />ENVIRONMENTAL ASSESSMENT <br />nTLE TRANSFER OF SELECTED COLORADO-BIG 1lI0MPSON PROJECT WATER <br />FACILITIES TO THE NORTHERN COLORADO WATER CONSERVANCY DISTRICT <br /> <br />lands and municipalities in northeastern Colorado. The C-BT Project delivers about <br />230,000 acre-feet of water annually to northeastern Colorado for agricultural, municipal, <br />and industrial uses. The water is used to help irrigate 61 S ,000 acres of northeastern <br />Colorado fannland and supply 30 cities and towns. Twelve reservoirs, 3S miles of <br />tunnels, 95 miles of canals, and 700 miles of transmission lines comprise the complex <br />collection, distribution, and power system. The C-BT system spans 150 miles east to <br />west and 65 from north to south (Figure 2). <br /> <br />West of the Continental Divide, Willow Creek and Lake Granby collect and store the <br />water of the upper Colorado River. It is pumped into Shadow Mountain Reservoir where <br />it flows by gravity through Grand Lake. From there, the 13. I-mile Alva B. Adams <br />Twmel transports the water under the Continental Divide to the East Slope. <br /> <br />Once the water reaches the East Slope, it is used to generate electricity as it falls <br /> <br />almost Y, mile through five power plants on its way to Colorado's Front Range. Carter <br /> <br />Lake, Horsetooth Reservoir, and Boulder Reservoir store the water. Upon reaching <br /> <br />Flatiron Afterbay at the end of the foothills power system, the water is either pumped to <br /> <br /> <br />Carter Lake Reservoir for use in the Little Thompson, Saint Vrain, Boulder, and South <br /> <br />Platte Valleys to the south, or directed northward to the Big Thompson and Poudre <br /> <br /> <br />Valleys. Water pumped to Carter Lake Reservoir is subsequently transported southward <br /> <br /> <br />via the supply canals or returned to the afterbay via the Flatiron Power and Pumping <br /> <br />Plant District allottees north of Flatiron Afterbay are served by the Horsetooth Feeder <br /> <br /> <br />Canal, Horsetooth Reservoir, Dixon Feeder Canal, and the Charles Hansen Supply Canal <br /> <br />and Windsor Extension, and North Poudre Supply Canal and Diversion Works. <br /> <br />6 <br />