The western slope collection system traps runoff from the high mountains and stores, regulates, and conveys the water to the Alva B. Adams Tunnel for diversion under the Continental Divide. I am not sure about the politics behind this but I believe there are some concerns over the 'environmental justice' of taking water from the west to cater for farmers in the east. Shows completed features, works under construction and remaining features required for project. The canal conveys the water 1.8 miles to Shadow Mountain Lake, which also intercepts North Fork flows of the Colorado River. The pumping plant contains three centrifugal pumps with a total capacity of 600 cubic feet per second at 186-foot head. The C-BT is owned and primarily managed by the U.S. Bureau of Reclamation's Eastern Colorado Area Office under its Great Plains Region. Grand Lake is Colorado's largest and deepest natural lake. Leading from the Carter Lake outlet, the St. Vrain Supply Canal extends southward 9.8 miles to St. Vrain Creek near Lyons. Windy Gap Dam. The dikes have a total volume of 1,739,000 cubic yards. Print. The reservoir can hold up to 112,230 acre feet (0.13843 km3) of water. Green Mountain Dam. Water is stored in this reservoir for delivery to the Little Thompson River, St. Vrain Creek, Boulder Creek, and the South Platte River, for return to Flatiron Reservoir for use in the Big Thompson or Cache la Poudre Valleys, or for power generation. Willow Creek Pumping Plant lifts the water 175 feet; it then flows by gravity to Lake Granby. Construction on the project continued through most of the next 20 years. C-BT Project Collection & Distribution Systems Map. 33 municipalities receive a portion of their water through the C-BT Project, along with 120 ditch, reservoir and irrigation companies. The profile maps in the center bottom of the screen shows the elevation of some of the pipe/tunnel sections, that indicate portion under gravity flow and the ones being pumped. Water is delivered to the river to replace, by exchange, that water diverted upstream of the North Poudre Supply Canal, which conveys it to the North Poudre Ditch. The St. Vrain Supply Canal delivers water from Carter Lake to the Little Thompson River, St. Vrain Creek, and the Boulder Creek Supply Canal. The pumping lift ranges from 85 to 186 feet according to the water surface elevation in Lake Granby. [Washington : Govt. The fire is also threatening two major water sources of the Colorado-Big Thompson Project — in Grand Lake and Lake Granby — which pumps water from west of the Continental Divide to … The Windy Gap project is not owned by the Bureau of Reclamation, but by the Municipal Subdistrict, a consortium of 14 Front Range cities, water providers and an electric utility. Willow Creek, a tributary below Lake Granby, is diverted by Willow Creek Dam and Canal. From Lake Estes the water travels east via the Olympus and Pole Hill Tunnels to the 38.2 MW Pole Hill Powerplant, where it drops 825 feet (251 m),[4] and flows via the shorter Rattlesnake Tunnel to Pinewood Lake. In recent years, however, water supply demands have shifted making municipal and industrial supply the main water beneficiary, rather than irrigation. The story of the Colorado-Big Thompson project. The canal has a carrying capacity of 200 cubic feet per second. The two bodies of water are connected by a short channel which allows water to flow freely to the intake of the Alva B. Adams Tunnel on Grand Lake's eastern shore. Gunnison River. While the project was originally built for agricultural purposes, it serves multiple demands including municipal and industrial supply, hydro-power generation, recreation, and fish and wildlife. Once the water reaches Flatiron Reservoir, it splits into two branches which distribute water to about 50 miles (80 km) of the Front Range Corridor, from Fort Collins to near Denver. Crystal Dam. Dam on the Blue River. Flatiron Dam provides afterbay storage for water discharged from the power plant. The afterbay storage in Lake Estes and the forebay storage in Marys Lake enable the Estes Power Plant to meet daily variations in energy demand. Without local enterprise, understanding, and support, the project could not have been constructed. Nearly every foot of the head is used for hydroelectric power generation. Great Plains Region.] Today, the "C-BT" serves over 33 cities and towns in northeastern Colorado, including Fort Collins, Greeley, Loveland, Estes Park, Boulder, and Sterling, encompassed by 7 counties, providing a secondary source of water for around 1 million people and an irrigated area of 640,000 acres (2,500 km²). Notice: Undefined variable: key in /data/webs/www/docs/projects/facility.php on line 210 In the late 1930s a solution was found: divert the water via a 13.2-mile (21.2 km)-long tunnel under the Continental Divide and Rocky Mountain National Park. The pumping unit at Flatiron Power Plant pumps from Flatiron Reservoir to Carter Lake through a 1.4-mile-long connecting pressure tunnel. The submarine-type conduit is the connection between eastern and western slope circuits and is in a nitrogen gas-filled pipe suspended from the top of the Alva B. Adams Tunnel. Water pumped southward into Carter Lake is stored for irrigation deliveries to the Little Thompson River, St. Vrain Creek, Boulder Creek, and the South Platte River. Project power facilities are interconnected with plants of the North Platte, Kendrick, Riverton, and Shoshone Projects, and are tied into the lines of the Public Service Company of Colorado at five different locations in Colorado. Carter Lake Dam and Reservoir Carter Lake is one of the two main project storage reservoirs in the East Slope distribution system. Get this from a library! Er fließt von den Bergen der Rocky Mountains nach Utah und Arizona und bildet größtenteils die Grenze zwischen Arizona und Nevada sowie die komplette Grenze zwischen Arizona und Kalifornien. Emerging from the tunnel into the East Portal Reservoir, the water flows across Aspen Creek Valley in a siphon and then under Rams Horn Mountain in a tunnel. During times of peak power demand, water can be released back from Carter into Flatiron via a pump-generating unit. Big Thompson Powerplant Documents in this collection include reports, maps, and data related to the Colorado-Big Thompson Project. It stores, regulates, and diverts water from the Colorado River on the western slope of the Continental Divide to the eastern slope of the Rocky Mountains. The water is discharged into a canal which has a capacity of 1,100 cubic feet per second, and conveyed 1.8 miles to Shadow Mountain Lake. From Marys Lake to Estes Power Plant, the water is dropped 482 feet in a pressure system consisting of Prospect Mountain Conduit and Prospect Mountain Tunnel. Green Mountain Powerplant Pole Hill Power Plant operates under an average net head of 815 feet with a generating capacity of 33,250 kilowatts. Dillon Dam and Roberts Tunnel. The canal crosses the Big Thompson River in a siphon above the river and highway. Total volume of the dam is 2,974,000 cubic yards. Willow Creek Dam, Reservoir, and Pumping Plant. Leaving Pole Hill Power Plant Afterbay, the water enters Rattlesnake Tunnel and flows into Pinewood Lake formed by Rattlesnake Dam. Eleven reservoirs, about 18 dams and dikes, the Alva B. Adams Tunnel under the Continental Divide, as well as six power plants, make up the project. Colorado-Big-Thompson-Projekt . Blue River. In addition, lambs, hogs, and cattle are fattened from the byproducts of the sugar beets. 595). One provides that a conservancy district may be organized by any distric court upon petition of a stipulated number of property owners; another recognizes that all who benefit as a result of project development should contribute to its cost and operation in proportion to those benefits. A control structure ahead of the Big Thompson River Siphon provides a means to release irrigation water to the Big Thompson River to bypass surplus water, and to release water to the Big Thompson Power Plant. Scale indeterminable. A plan was developed whereby Colorado River water could be diverted into watersheds in northeastern Colorado where there was a surplus of irrigable lands and a shortage of water. Der Fluss entspringt im Rocky-Mountain-Nationalpark im US-Bundesstaat Colorado, nordwestlich von Denver auf der Westflanke der Nordamerikanischen Kontinentalen Wasserscheide. United States. A drop of over 2000 vertical feet from the Rockies down to the plains allows for power generation. During 1956, all major features were essentially completed except the Big Thompson Power Plant, which was completed in 1959. Diverted water is used for power generation at the Big Thompson Power Plant, or water surplus to the needs of the Big Thompson Valley can be stored in Horsetooth Reservoir. Notice: Undefined variable: key in /data/webs/www/docs/projects/facility.php on line 210 This reservoir was built under an agreement between the city and the Northern Colorado Water Conservancy District. Lake Estes serves to regulate both C-BT water and the natural flows of the Big Thompson River. The afterbay storage in Flatiron Reservoir and the forebay storage in Pinewood Lake enable Flatiron Power Plant to meet daily power loads. User-contributed reviews. Water is pumped from Lake Granby into Shadow Mountain Lake by Granby Pumping Plant and Canal. Green Mountain Dam, Reservoir, and Power Plant. The first power was generated at the Green Mountain Power Plant in May 1943; all construction of the dam and power plant was completed in October 1943. Major features of the project include dams, dikes, reservoirs, powerplants, pumping plants, pipelines, tunnels, transmission lines, substations, and other associated structures. Das Colorado-Big-Thompson-Projekt ist das größte Wasserumleitungsprojekt in Colorado. Southward, the Flatiron reversible pump lifts water from Flatiron Reservoir, a maximum of 297 feet and delivers it through Carter Lake Pressure Conduit and Tunnel to Carter Lake. While simple in concept, the design and operation of the Colorado-Big Thompson Project is quite complex. Granby Dam. Service Area Map; Newsletters; COVID-19: LTWD Updates; Home; Supply and Planning; Water Storage Water Storage. Ice fishing and snowmobiling have become favorite winter sports. [5] From the tailrace of the powerplant the water enters Flatiron Reservoir from which the water is distributed to the East Slope. Off [Washington 1963. Notice: Undefined variable: key in /data/webs/www/docs/projects/facility.php on line 210 U.S. Department of the Interior: Water and Power Resources Service, Project Data, pps 251-292. This plant is located on the west shore of Marys Lake, which has been enlarged by diking the small natural basin to provide afterbay and forebay capacity for reregulating the flow. Eleven communities receive municipal and industrial water from the project. Trout, kokanee, bass, walleye, and perch are the principal fish caught in the clear, cool waters. Off. The Colorado-Big Thompson Project (abbreviated C-BT) is a federal water diversion project in Colorado designed to collect West Slope mountain water from the headwaters of the Colorado River and divert it to Colorado's Front Range and plains.wikipedia. Maps; Glossary; Search. [United States. Notice: Undefined variable: key in /data/webs/www/docs/projects/facility.php on line 210 At the end of the war, the tempo of construction was speeded up. Although water rights allow for up to 310,000 acre feet (380,000,000 m3) of water a year to be diverted, annual diversions average around 220,000 acre feet (270,000,000 m3), instead. The dependable availability of water continues to attract a variety of industires. The 0.5-mile, 250-cubic-foot-per-second Windsor Extension Canal takes part of the Poudre supply across the river to the Poudre Valley Canal, an older waterway that serves a portion of the conservancy district. The Soldier Canyon Dam outlet supplies water to Colorado State University, to the small Dixon Feeder Canal for the irrigated area cut off from its water supply by Horsetooth Reservoir, to Fort Collins, and to rural water districts. In order to survive the agricultural season, additional water supplies would be needed. The story of the Colorado-Big Thompson project Govt. Releases are made from Lake Granby to maintain the Colorado River as a live fishing stream. The water and power control center for Reclamation's reservoirs, power plants, and transmission lines in Wyoming, COlorado, and western Nebraska is at the project headquarters in Loveland, Colorado. Other articles where Colorado-Big Thompson Project is discussed: Colorado River: Economic development: In 1945 the Colorado–Big Thompson Project, the first federal interbasin water-diversion project in the United States, was completed. Colorado–Big Thompson project, constructed by the U.S. Bureau of Reclamation to divert water from the headstreams of the Colorado River to irrigate c.720,000 acres (291,400 hectares) of land in NE Colorado and to supply power; built 1938–56. In search of a solution, farmers and their representatives approached the Bureau of Reclamation. 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