20040521Response of Avista to Potlatch.pdf

Avista Corp.
1411 East Mission POBox3727
Spokane, Washington 99220-3727
Telephone [phone]
Toll Free 800-727-9170
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Conley E. Ward
GIVENS PURSLEY LLP
601 W. Bannock Street
PO Box 2720
Boise, ill 83701-2720
Re:Second Production Request of Potlatch Corporation
in Case Nos. A VU-04-01 and A VU-04-
Mr. Ward
I have attached one copy of Avista s response to Potlatch Data Request No. 22.
If you have any questions, please call me at [phone] or Don Falkner at (509) 495-
4326.
Mike Fi
Rate Analyst
Enclosures
Cc:S. Woodbury
D. Peseau
A. Yanke
(IPUC)
(Utility Resources, Inc.
(Yanke 1 & Assoc, Inc.
VISTA CORPORATION
RESPONSE TO REQUEST FOR INFORMATION
JURISDICTION:
CASE NO:
REQUESTER:
TYPE:
REQUEST NO.
Idaho
A VU - E-O4-0 1 / A VU -O4-0 1
Potlatch
Data Request
DATE PREPARED:
WITNESS:
. RESPONDER:
D EP AR TMENT:
TELEPHONE:
05/17/2004
Don KopczYnski
Warren Clark
Trans. Operations
[phone]
REQUEST:
Please refer to Mr. Morris s testimony at page 17 , lines 13-17. For each year from 2003 through
2006, specify the annual increases in Avista s firm transmission and load carrYing capability
resulting from the annual transmission capital expenditures.
RESPONSE:
To specifically identify the "annual" increase in Avista s firm transmission and load carryingcapacity resulting from transmission capital expenditures internal to Avista s networked
transmission system is not possible. Electricity follows the path of least resistance.Reconductoring of existing transmission lines or construction of additional transmission lines
changes the impedance of the networked transmission system. It is not possible to identify theannual load carrying capacity of a networked transmission system. Even if it were possible todetermine the total capacity of the network transmission system, there are other factors thatimpact the transmission network system capacity. These factors include ambient temperature
actual load and generation on-line connected to the system, and energy transmitted across the
transmission system.
However, it is possible to identify the increase of capacity on individual transmission line
segments. As Mr. KopczYnski explains in his testimony, Avista Utilities, in collaboration with
the Bonneville Power Administration (tBP A
),
is building and upgrading transmission
infrastructure that will improve the delivery of electricity to meet existing and future power
needs in Avista s service territory. This collaborative effort defined as the West of Hatwai
projects is a culmination of many years of system planning work, contract negotiations, andcoordinated transmission operations that will improve the delivery of electricity to meet existing
and future power needs in Avista s service territory. The construction has the added benefit of
providing additional transmission capacity to meet future growth needs in the region. Thefollowing is a list of Avista s transmission upgrades associated with the West of Hatwai projects.
The table also identifies the individual line segments capacity increases, but as explained earlier
these capacity increases do not necessarily translate to specific increases in Total Transmission
Capacity.
Please also see the Company s response to Staff Request No. 256.
Response to Potlatch Data Request No. 22
Page 2
Work Prior Summer New Summer
Completed Ratine Ratine
Beacon-Rathdrum 230 kV (Rebuild from single 2004 285 MV A 1768 MVA
circuit to double circuit)
Hatwai-Lolo 230 kV line (Reconductor)2005 428 MV A 829 MV A
Hatwai-North Lewiston 230 kV (Reconductor)2005 417 MYA 884 MV A
Dry Creek-North Lewiston 230 kV line (Upgraded)2005 365 MV A 483 MY A
Dry Creek 230/115 kV Substation (New)2005
Dry Creek 230 kV - Installation of capacitors 2005 0 MVAR 216 MVAR
Beacon-Bell #4 230 kV (Reconductor)2005 285 MY A 884 MV A
Beacon-Bell #5 230 kV (Reconductor)2006 366 MY A 884 MV A
Benewah 230 kV - Installation of capacitors 2006 0 MVAR 216 MVAR
Benewah-Shawnee 230 kV (New construction)2006 OMVA 884 MV A
These major transmission upgrades began in 2003 and are scheduled to be complete by year-end
2006. The West of Hatwai projects (including both Avista s and BPA's transmission network
upgrades) will help relieve current transmission congestion in the area and improve system
reliability.