WSP05214

• File Number: 8141.700
• Description: Fryingpan-Arkansas Project - Annual Operating Plans and Reports
• State: CO
• Basin: Arkansas
• Water Division: 5
• Date: 11/1/1989
• Author: US DoI BoR
• Title: Annual Operating Plan Fryingpan-Arkansas Project Colorado 1989 - 1990
• Water Supply Pro - Doc Type: Annual Report

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Table 14 and exhibit 22 show the proposed operation of Turquoise Lake in
WY 1990.

E. Federal Fish Hatchery and Halfmoon Creek Diversion

The Federal Fish Hatchery near Leadville, Colorado, will be
supplied flow-through Project water at a rate of up to 6.7 ft3/s
as has been done 1n past years. This flow is released from
Turquoise Lake through Mt. Elbert Conduit to the fish hatchery and then
into the Arkansas River. The flow is later stored, less appropriate
transit losses, in Pueblo Reservoir.

The planned operation of Halfmoon diversion is to divert all the flow in
Halfmoon Creek, to the maximum diversion capacity of 150 ft3/s,
which is in excess of the downstream call on Halfmoon Creek or
the instream minimum flow. At times, this diversion flow may be
restricted due to operational releases from Turquoise Lake into
Mt. Elbert conduit. The diverted flow plus the release will pass through
Mt. Elbert Powerplant and will then be released to the Arkansas River
via Lake Creek.

F. Twin Lakes/Mt. Elbert Forebay

Twin Lakes/Mt. Elbert Forebay will be operated to maximize power
generation. Twin Lakes will always: 1. maintain sufficient water in
storage to be pumped into Mt. Elbert Forebay to allow 1 day of
generation or, 2. provide sufficient space in Twin Lakes to allow the
evacuation of the 1-day demand from Mt. Elbert Forebay. At no time will
the water surface elevation in Twin Lakes be less than 9168.7 feet while
the powerplant is in service.

Flow-through water at Mt. Elbert Forebay will be supplemented by pumping
from Twin Lakes to allow full utilization of Mt. Elbert Pumped-Storage
Powerplant. Therefore, as much water as possible wi 11 be released
from Turquoise Lake and diverted from Halfmoon Creek into Mt. Elbert
Conduit for use at the powerplant.

Twin Lakes Reservoir and Canal Company has both an East Slope Storage
Decree and West Slope Storage Decree which allows the company to store
up to 54,452 acre-feet of water. The company wi 11 store as near as
possible their maximum capacity this year from either or both sources
and maintain that storage for as long as possible.

The minimum release from Twin Lakes is 15 ft3/s or natural inflow,
whichever is less. Table 15 and exhibit 23 show the proposed operation
in Twin Lakes/Mt. Elbert Forebay for water year 1990.

G. Pueblo Reservoir

Water released from storage in Turquoise Lake and Twin Lakes during
the year, that is not for demands above Pueblo Reservoir, will be stored

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