WSP06826

• File Number: 8441.600.20
• Description: Pleasant Valley Pipeline
• State: CO
• Basin: South Platte
• Date: 11/1/2000
• Author: USDOI/BOR
• Title: Pleasant Valley Pipeline Draft Environmental Assessment
• Water Supply Pro - Doc Type: Publication

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PLEASANT V ALLEY PIPELINE
ENVIRONMENTAL ASSESSMENT

southeast the pipeline would cross agricultural lands north of the community of Bell vue
and State Road 28 east of Bellvue. The proposed pipeline would continue southeast
crossing the Pleasant Valley and Lake Canal until it intersects Bingham Hill Road. The
pipeline would be located in Bingham Hill Road until just east of Claymore Lake where
it would turn south along a secondary road and cross agricultural fields to the south side
of Claymore Lake. The pipeline would then turn south and parallel the existing Fort
Collins pipeline right-of-way to the terminus at the Fort Collins and Soldier Canyon
WTPs.

A pressure dissipation vault would be constructed at the project terminus and water
would be conveyed to existing pipelines for distribution to the Fort Collins and Soldier
Canyon WTPs. A turnout would be installed on the pipeline to deliver water to the
Bellvue WTP via an existing pipeline. This structure would include an isolation valve to
control winter and summer pipeline operations.

A fiber optic cable would be located within the pipeline easement to provide
operational control of intake facilities. Conduit for the cable would be installed during
pipeline placement and the cable would be pulled through when the line is complete.

Project Operation

The PVPL would convey raw water from the Poudre River via the Munroe Canal to
the Fort Collins and Soldier Canyon WTPs during the summer delivery period (generally
April through October). During the winter (generally November through March), the
PVPL would convey C-BT water from Horsetooth Reservoir to the City of Greeley's
Bellvue WTP. The pipeline would operate as a gravity system under both summer and
winter conditions. Gravity flow from the Munroe Canal and proposed forebay south is
possible due to a hydraulic grade between the diversion point and the terminus near
Horsetooth Reservoir. During the winter, raw water would enter the PVPL from the
existing Soldier Canyon outlet pipe from Horsetooth Reservoir. There is sufficient head
difference between the water surface elevation in Horsetooth Reservoir to allow gravity
flow north to the Bellvue WTP turnout.

The Munroe Canal has sufficient excess capacity to allow diversions and conveY1illce
of water to the PVPL in addition to diversions by NPIC (TZA 2000). The PVPL would
not affect the continued delivery of water to NPIC shareholders through the Munroe
Canal. The District would enter into an agreement with NPIC regarding deliveries of
water through the Munroe Canal. This agreement would preserve the ability of the
company to make water deliveries to its shareholders.

Water Delivery Tbrougb tbe PVPL
The anticipated capacity of the PVPL is 120 mgd (185 cfs). Water deliveries are
e)(pected to increase over time as demand increases. Preliminary hydrologic modeling
(TZA 2000) was used to project water demands for the years 2002 (the potential
completion date for the PVPL), 2010,2020 and 2030 (Table I). Water deliveries to each
of the three entities would be derived from several sources and water rights as described
below.

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