WSP10444

• File Number: 8441.400
• Description: Colorado Big Thompson Project - Reports
• State: CO
• Basin: South Platte
• Water Division: 1
• Date: 8/1/1986
• Author: Colo. Water Resource
• Title: Summary Report - Preliminary Hydrologic Analysis
• Water Supply Pro - Doc Type: Report/Study

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Th'e 52,000 . . af replacement pool of Green . Mountain
Reservoi~ has first prio'rit;{ for filling and is reserved
to provide replacement water. f.or out-of~priority CBT
project diversions.

.

Releases from the 100,000 at power pool of Gre.enMountain
Res'ervo,ir are used to makeup natural water shortages for
perfected ir't:"igation and domestic useS with a decreed,
date senior to 1977. Annual rele<ls'e. of up to 66,000 af
is allowed during the irrig<ltion sea$on (assumed to be
April through october) to satisfy .theGrand Valley demand
and to relieve shortages .toother irrigation diversions
senior to 1977 caused by the Shosnoheor Cameo call.

.

The. remaining water available from the 100,000 af power
. pool in Green Mountain Reservoir is used. to meet the
demands for water sales.

.

During the non-irrigation Season (assumed to be November
through April) releases frOm Green Mountain Reservoir are
made fo~ power production and replacement of CBT out-of-
priority diversions. Winter releases are used to
drawdown the ~eservoir to. a level between 40,000 and
60,000 af by. April. d$pending on the anticipated inflows
during the snowmelt season.

.

Williams Fork Rese~voirprovides replacement for out-of-
priority diversions by the Fraser River Diversion
Project, the Williams Fork Diversion Project, the RobertS
Tunnel, and storage in Dillon Reservoir.

.

Dillon Reservoir is allowed to store out-of-priority to
Green Mountain Reservoir under the condition that it
satisfies the one fill requirement by Green Mountain
Reservoir by the. end of the. water year. Calis on Green
Mountain Reservoir are met first by releases from

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