WSP05412

• File Number: 8141.700
• Description: Fryingpan-Arkansas Project - Annual Operating Plans and Reports
• State: CO
• Basin: Arkansas
• Water Division: 5
• Date: 11/1/1986
• Author: US DoI BoR
• Title: Annual Operating Plan Fryingpan-Arkansas Project Colorado 1986 - 1987
• Water Supply Pro - Doc Type: Annual Report

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of water through the Homestake Tunnel: from lIIay to September. In
addition to the Homestake imports, Busk-Ivanhoe imported approximately
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5,400 acre-feet of water through the Carlton Tunnel throughout the year
and 1,400 acre-feet of water through Boustead Tunnel during May, June,
and July. Of the total 6,800 acre-feet, 3,400 acre-feet was stored for
the High Line Canal Company in the Pueblo Board of Water Works permanent
storage space and the remainder either stored or flowed through
Turquoise Lake for the Pueblo Board of Water Works. The Project
imported 30,270 acre-feet of water through the Boustead Tunnel dur i ng
water year 1 986. .

Turquoise Lake storage was near capacity from May through September.
Exhibits 6 and 7 show the precipitation and pan evaporation at Turquoise
Lake. The water year ended with a content of 128,200 acre-feet in
storage.

Table 4 and exhibit 8 show the operation of Turquoise Lake during the
water year 1986.

F. lilt. Elbert Conduit/Halfmoon Cree~ Diversion

During water year 1986, 60,340 acre-feet of water were released
from Turquoise Lake and 7,030 acre-feet of water diverted at Halfmoon
Creek Diversion through Mt. Elbert Conduit .to Mt. Elbert Forebay
(exhibit 9).

G. Twin Lakes/Mt. Elbert Forebay and Mt. Elbert Pumped-Storaqe
Powerplant

On September 30, 1985, the lake surf~ce elevation of Twin Lakes was
9198.28 feet with a content of 136,160 acre-feet of water. Mt. Elbert
Forebay water surface elevation was at 9625.06 feet with a content of
5,900 acre-feet. Exhibits 10 and 11 show the precipitation and pan eva-
poration at Twin Lakes

Twin Lakes was operated throughoutl the year bas ically fu 11 and
bypassing all inflow. Beginning in March, the reservoir was drawn down
to provide storage space to better contrdl releases at the safe channel
capacity below Twin Lakes Dam during thej spring runoff. By the end of
June with all reservoirs virtually full, ~win Lakes was allowed to fill
into part of the reserved power pool space. The reservoir was then
drawn down to the operating range by the end of August and operated
nearly full the remainder of the water year. Table 5 and exhibit 12
show Twin Lakes/Mt. Elbert Forebay operatjon for water year 1986.

Mt. Elbert Pumped-Storage Powerplanll had at least one unit online
throughout the water year. The powerp 1 an,t had 67,380 acre-feet of flow
through water avai lable along with 414,58D acre-feet of water pumped
from Twin Lakes. The powerplant generated 170,461,000 kilowatt-hours
during water year 1986 with 473,630 acre-feet of water (table 6).

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