WSP03221

• File Number: 8441.100
• Description: Colorado Big Thompson Project - Project Description
• State: CO
• Basin: South Platte
• Water Division: 1
• Date: 1/1/1950
• Title: The Colorado - Big Thompson Project
• Water Supply Pro - Doc Type: Project Overview

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Soldier Canyon Darn and extends southeasterly to existing irriga-
tion facilitieso

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Poudre Supply Canal, under construction north of Horsetooth
Reservoir, leads from the reservoir outlet at Horsetooth Dam and
extends north approximately 5,,2 miles to the Cache la Poudre River"
This canal is designed to carry 1,500 cfs of water from the res-
ervoir to a bifurcation works located on,Lewstone Creek" From
this point the entire flow may be directed onward to the river or
a portion of the water may be diverted to the pronosed Windsor
Supply Canal 0

North Poudre Supnly r,anal will carry supplemental water to
lands currently irrigated from the North Fork of the Cache la
Poudre River by means of the existing North Poudre Ditcho Current
plans contemplate the construction of a diversion headworks on the
Cache la Poudre River, about 14 miles northwest of Fort Collins,
and an II-mile long canal leading to the existing ditch at a point
located about 9 miles northwest of the town" This canal will have
a capacity of 250 cfs and will require the construction of a siphon
and three tunnels"

Power Transmission System

Transmission Systemo--In addition to the construction of
hydroelectric plants and the production of energy from project
operation, the power development phase of the project plan includes
the delivery of salable energy to preference customers in the
market area" To assure the availability of this energy at public-
owned power and distribution systems, a network system of trans-
mission lines and substations is being constructed to connect the
various power plants of the prQject with load centers serving
municipalities, communities, and RoE"A. cooperative systems in
Colorado and with other projects located in Colorado, wyoming, and
Nebraska"

Transmission system facilities, completed or under construc-
tion, include aoproXLmately 500 miles of l15,000-volt circuit and
associated substations" These facilities include the following
linesg Green Mountain-Dillon; Green Mountain-Oak Creek; Estes-
Marys Lake; Estes-Flatiron-Greeley-Brush-~terling, with extensions
to Wiggins and Prospect Valley; Wiggins-Hoyt; Brush-Yuma-Wray;
Flatiron-Leyner-Brighton; Beaver Creek-Limon; Pole Hill-Flatiron;
Big Thompson-Flatiron, and Salida-Gunnison, reached through facili-
ties of the Public Service Company of Colorado" There are also
approximately 130 circuit-miles of 69,000-volt transmission lines
which include Green Mountain-Granby Pumping Plant; Granby Pumping
Plant-Estes which includes 69,000-volt, gas-insulated submarine
cable through the Alva Bo Adams Tunnel; extension to Willow Creek
Pumping Plant, and the Sterling-Holyoke line"

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