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COLORADO...B IG THOMPSON PROJECT The Colorado-Big Thompson Project Hill provide a supplemental water supply to approximately 615,000 acres of land now under culti- vation and will develop electrical energy for resale to consumers and distributing agencies in Colorado, Wyoming, and Nebraska. The combined ge~erating capacity will be approximately 176,000 kilowatts, The key feature of the project is the Alva B. Adams Tunnel which pierces the backbone of the Roc~ Mountains for a distance of 13.1 miles bet\.reen Grand Lake, Colorado, and Estes Park. It is through this tunnel that stored water from the western slope watershed will be diverted to the eastern slope for irrigation and power purposes. The largest reservoir on the project, Granby Re~ervoir, is lo- cated on the western slope of the Colorado River and will store 'ex- cess runoff, which will later be pumped through Granby Pumping Plant into Shadow l-1ountain Lake. From Shadow 110untain Lake, the pumped water, together with additional water flowing into it, will flow by gravi ty through Grand Lake and thence into the Alva B. Adams Tunnel and Under the Continental Divide to the eastern slope. Tvlo large reservoirs, namely, Horsetooth Reservoir and Carter Lake Reservoir, with a combined capacity of 256,000 acre-feet, will be used for storage of \Tater preparatory to release for irrigation purposes. Water will be released from these two reservoirs through supply canals into the Poudre RiveT, the Big Thompson, St. Vrain Creek, Boulder Creek, and the Platte River, Green Mountain Reservoir is located on the Blue River, a tr~b.!l-u, tary of the Colorado River on the- westernslope-.--Wa:ters-t;oredU in this reservoir \01111 provide a continuous and uninterrupted flow of water \vhich might otherwise have been interfered Hi th as a result of the diversion process. Power plants of the project will be interconnected with power systems of the North Platte, Kendrick, Riverton, and Shoshone Projects in addition to numerous privately and publicly-owned systems. The total cost of the project is estimated at'$144,581,OOO and the program for fiscal year 1949 was ~23,995, 706. ' Major features of this project are discussed in more detail on subsequent paees, 32.