WSP00420

• File Number: 8441.600.20
• Description: CBT Title Transfer to NCWCD
• State: CO
• Basin: South Platte
• Date: 10/1/2000
• Author: USDOI/BOR
• Title: Draft Environmental Assessment - Title Transfer of Selected Colorado-Big Thompson Project Water Facilitiies to the Northern Colorado Water Conservancy District
• Water Supply Pro - Doc Type: Publication

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ENVIRONMENTAL ASSESSMENT
nTLE TRANSFER OF SELECTED COLORADO-BIG THOMPSON PROJECT WATER
FACILITIES TO THE NORTHERN COLORADO WATER CONSERVANCY DISTRICT

capacity of] ,500 cfs, The surface area covered by the easement associated with the canal
is ] 67.88 acres with an average width of ] 50 feet ]n addition to providing for the
delivery of supplementary water to the Poudre Valley, the canal provides for the
replacement of water diverted into the North Poudre Supply Canal. The main canal is
composed of unlined and concrete-lined trapezoidal sections, a rating section with
gauging station, four siphons, chute and outlet stilling basin.

Windsor Extension

The Windsor Extension begins at the bifurcation works on the Charles Hansen Supply

Canal and extends north, crossing the river, to the Windsor Canal and Reservoir

Company Canal, which diverts from the river above the point where project deliveries are

made. The Windsor Extension is V, mile long and has a design capacity of250 cfs. It is

made up of an inlet control works, concrete-lined trapezoidal section, Parshall flwne and

gauging station, bench flwne, the Poudre River Siphon, and an outlet control works. The

width of the easement above the Poudre River siphon is about ] 50 feet

North Poudre Supply Canal
The North Poudre Supply Canal leads from the Cache la Poudre River at a point
about I mile above its confluence with the North Fork and extends northeast about 12.85
miles to a junction with the North Poudre Ditch at a point located about 12 miles
northwest of Fort Collins. The area covered by the easements associated with the canal is
359.7 acres, with a typical width of 100 to 110 feet The canal passes through four
tunnels. The width of the easements above the tunnels is typically 12.5 to ] 5 feet. The
canal is designed to divert and transport water from the river to supplement irrigation
supplies taken from the North Fork by the North Poudre Ditch. Water diverted via the
supply canal may be replaced in the river about 6 miles below the diversion point by
water release from Horsetooth Reservoir via the Charles Hansen Supply Canal.

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