WSP12206

• File Number: 8141.700
• Description: Fryingpan-Arkansas Project - Annual Operating Plans and Reports
• State: CO
• Basin: Arkansas
• Water Division: 5
• Date: 11/1/1990
• Author: US DoI BoR
• Title: Annual Operating Plan Fryingpan-Arkansas Project Colorado 1990 - 1991
• Water Supply Pro - Doc Type: Annual Report

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'2.1 S 4:

F. Twin lakes/Mt. Elbert Forebav

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 For$bay to allow 1 day of generation
or, (2) provide sufficient space in Twin lakes to allow the evacuation of
the I-day demand from Mt. El bert Forebay. At no time wi 11 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 utilizati:on of Mt. Elbert Pumped-Storage
Powerplant. Therefore, as much water as possible will be released from
Turquoise lake and diverted from HalfmoonCreek 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 wh i ch allows the company to store up to
54,452 acre-feet of water. The company will 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 17 and exhibit 23 show the proposed operation in Twin
lakes/Mt. Elbert Forebay for water year 1991.

G. Pueblo Reservoir

Project water released from storage :in Turquoise lake and Twin lakes
during the year, that is not for demands: above Pueblo Reservoir, will be
stored in Pueblo Reservoir. Water in stprage (Project, winter water, or
water stored under contract with other entities) will be released on demand
of the contractor and administered in the Arkansas River by the Colorado
Division of Water Resources Division 2 Engineer.

The Arkansas River water users winter water storage decree will be in effect
beginning November 15, 1990. Under this decree, the total system production
up to 100,000 acre-feet will be divided 28.8 percent to entities with
direct-flow water rights (stored in Pueblo Reservoir) and 71.2 percent to
entities having storage water rights and their own storage facilities. The
next 2,750 acre-feet will go to Amity Mutual Irrigation Company to be stored
in John Martin Reservoir or the Great Plains System, the next 356 acre-feet
will go to Holbrook Mutual Irrigation Company to store in their system. Any
water above the 103,106 acre-feet will be divided 75 percent to off-channel
storage entities and 25 percent for the direct-flow entities.

All winter water storage in Pueblo Reservqir shall be released to the river
if not furnished to the district within :18 months from the start of the
winter storage period but not later than M~y 1 of the year following the end
of the winter storage period in which it ,was stored. Any water stored in
the Joint-Use Pool, other than flood waters, will be released prior to
April 15 of each year.