HomeMy WebLinkAbout19900621Supplemental to Application.pdf/58~1
SNAKE RIVER ..IDAHO
HECEI
POVVER
, h.x11J L:
COMPANY
HYDRO POWER LED o BOX 70. BOISE, IDAHO 83707
.10 JUN 21 rF1 3 06 June 21, 1990
110 PU Lie
ITIES C Mtv1!S "lhi7?~
Mrs. Myrna J. Walters
Secretary
Idaho Public Utilities Commission
Statehouse
Boi se, Idaho 83720
Re: Supplement to Initial Appl ication
Case No. IPC-E-90-2
Dear Mrs. Walters:
Please find enclosed for fil ing an original and seven (7) copies of
Idaho Power Company iS Supplement to In it i a 1 App 1 i cat i on to Prov i de Commi tment
Estimate. The supplement has also been mailed to those individuals indicated
on the Certificate of Mail ing.
I f you have any quest ions, please feel free to call me.
~wLarry D. Ripley
Attorney
LDR:mmb
Enclosures
..
CERTIFICATE OF MAILING
I HEREBY CERTIFY that on thi s 21st day of June, 1990, I mai 1 ed a true
and correct copy of the within and foregoing SUPPLEMENT TO INITIAL APPLICATION
TO PROVIDE COMITMENT ESTIMATE, postage prepaid and addressed as follows:
Grant E. Tanner
Lindsay, Hart, Neil & Weigler
Suite 1800
222 SW Col umbi a
Portl and, OR 97201
Peter J. Richardson
Lindsay, Hart, Neil & Weigler
Jefferson PL ace, Su i te 400
350 N. Ninth
Boise, ID 83702
Afton Energy, Inc.
c/o Owen H. Orndorff
Orndorff & Peterson
Suite 230
1087 West River Street
Boise, ID 83702
Harold C. Miles
Energy & Natural Resources Committee
316 Fi fteenth Ave., South
Nampa, ID 83651
~~
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EVANS, KEANE, KOONTZ, BOYD,
c/o Idaho Power Company
1220 West Idaho Street
P.O. Box 70
Boi se, Idaho 83707
(208) 383-2674
STEVEN L. HERNDON
Idaho Power Company
1220 West Idaho Street
P.O. Box 70
Boise, Idaho 83707
(208) 383-2918
SIMKO & RIPLEY
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ES
Attorneys for Idaho Power Company
BEFORE THE IDAHO PUBLIC UTILITIES COMMISSION
IN THE MATTER OF THE APPLICATION OF )
IDAHO POWER COMPANY FOR AUTHORITY )
TO RATE BASE THE INVESTMENT REQUIRED)
FOR THE REBUILD OF THE SWAN FALLS )
HYDROELECTRIC FACILITY )
)
CASE NO. IPC-E-90-2
SUPPLEMENT TO INITIAL
APPLICATION TO PROVIDE
COMMITMENT ESTIMATE
In its initial Appl ication dated February 14, 1990, Idaho Power
Company (Idaho Power or Company) stated it would supplement that fil ing with a
Commitment Estimate for the Swan Falls Project.
COMMITMENT ESTIMATE
I
Set forth in Attachment 3 is the Swan Fall s Project Cost Estimate and
Commitment Estimate for (1) the decommissioning of the old powerhouse, (2) FERC
required renovation of the old powerhouse structure for historical purposes, and
(3) construction of the new powerhouse.
II
Updated Project cost estimates will be submitted to the Commission
as part of the Company i s Quarterly Report of Construct i on Projects. The updated
..
cost estimate will include any scope or escalation changes. The final cost
report on the Project will st ill compare the actual costs to the Commi tment
Estimate.
III
In addition, Idaho Power has been required by FERC to establ ish an
expedited construction schedule to insure stabilization of the existing
powerhouse no 1 ater than January 1994.The revi sed schedul e requi res
stabilization by April 1, 1994, with concentration on compressing the schedule
to January 31, 1994. Attachment 4 is Idaho Power1s letter, dated March 16, 1990,
that submi tted a revi sed schedul e and plan, and Attach~ent 5, FERC iS 1 etter,
dated March 26, 1990, is the approval of the revi sed schedul e and pl an. In
paragraph III of the Company/s Initial Application, the Company projected award
of the turbine and generator contract to be on or about December 1, 1990. Under
the revised schedule, the Company projects awarding the contract on October 15,
1990.
DATED This 21st day of June, 1990 at Boise, Idaho
~&£Attorney for
Idaho Power Company
2
..
BEFOR Tl
IDAHO PULI UTS COMSlON
CASE NO. PC-E-92
SLPLE TO NT APPUA TI
IDAHO POWE CQAN
A TT ACl 3
· IDAHO POWER COMPANY ·
SWAN FALLS HYDROELECTRIC PROJECT
COMMITMENT ESTIMATE
(IN THOUSANDS OF DOLLARS)
PROJECT
ESTIMATE 1/
1 NEW POWERHOUSE:
2 DIRECTS:
3 GENERAL CONSTRUCTION CONTRACTS $23,065
4 PROCUREMENT CONTRACTS 19,192
5 OTHER CONTRACTS & FACILITIES 926
6 TOTAL DIRECTS $43,183
7 INDIRECTS 404
8 OVERHEADS 9,504
9 AFUDC 6,843
10 TOTAL NEW POWERHOUSE $59,934
=============
11 DECOMMISSION OLD POWERHOUSE:
12 DIRECTS:
13 GENERAL CONSTRUCTION CONTRACTS $2,900
14 PROCUREMENT CONTRACTS 0
15 OTHER CONTRACTS & FACILITIES 9
16 TOTAL DIRECTS $2,909
17 INDIRECTS 0
18 OVERHEADS 435
19 AFUDC 108
20 TOTAL DECOMMISSION OLD POWERHOUSE $3,452
=============
21 RESTORATION OLD POWERHOUSE:
22 DIRECTS:
23 GENERAL CONSTRUCTION CONTRACTS $668
24 PROCUREMENT CONTRACTS 0
25 OTHER CONTRACTS & FACILITIES 0
26 TOTAL DIRECTS $668
27 INDIRECTS 0
28 OVERHEADS 155
29 AFUDC 19
30 TOTAL RESTORATION OLD POWERHOUSE $842
=============
31 TOTAL SWAN FALLS PROJECT 2/$64,228
32 1.25
33 TOTAL COMMITMENT ESTIMATE $80,285
=============
1/ COST ESTIMATE REPORTED IN DOLLARS AT COMPLETION.
2/ COST ESTIMATE EXCLUDES i REMOVAL COSTS i OF $804,000.
ATTACHMENT 3 ~
SUPPLEMENT TO INITIAL APPLICATION
..
BEFOR Tl
IDAHO PlUC UTTIS COMSSON
CASE NO. PC-E-92
SlPl TO NTAL APPUA TI
IDAH POWER CGAN
ATTACI 4
i
SNAKE RIVERØ£\;~~.- -' ~
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HYDROPOWER
. .
IDAHO POVVER COMPANY
BOX 70 · BOISE, IDAHO 13707
March 16, 1990
"
Mr Ronald A CorsoDirector .
D-D-S-I
Federal Energy Regulatory Commission
825 North Capi ta 1 Street, NE
Washington, DC 20426
Subject: Swan Falls Hydroelectric Project
Project No. 503, Idaho
Dear Mr Corso:
This is in reference to our March 12, 1990 meeting with you and
staff on the schedule and existing powerhouse stabilization plans for the Swan
Falls Project.
As agreed, the presented schedu 1 e, opti on 2, wi 11 be adopted.During the progress of the design and construction, our effort will be con-
centrated on finishing the stabilization of the existing powerhouse one year
earlier than our previous schedule, dated January 22, 1990.
Resubmitted for your approval under Article~ 304 of the Swan Falls
Amended License are an original and fourteen (14) copies of the revised
schedule, dated March 14, 1990, with a revised plan. The plan also includes
these additional features as agreed in our meeting:
o Prior to the new powerhouse excavation:
- Piezometers for monitoring existing powerhouse uplift under the
east bay adjacent to unit '10, and under the wall between units
'8 and 9 wi 11, be ins ta 11 ed .
- Concrete backfill will be placed in the east bay adjacent to
unit #10. Concrete backfill will also be placed in the bay
between uni ts '6 and '7 if it wi 11 not interfere wi th access
and operation of the powerhouse.
o The current monitoring program for the existing powerhouse in-
cludes:
A'. 4SUPPLE TO IN APCAON
..
Mr Ronald A Corso
Page 2
March 16, 1990
- Continuation of the current crack monitoring that consists of:
1. Read and record the Avongaard moni tors at least once per
month. Additional measurements shall be taken prior to,
during, and immediately after any dewatering activity or a
reservoir drawdown in excess of 3.5 feet. There are two
monitors located below the generator floor; one on the
right wall of unit #10, and one on the left wall of unit #7.
'2. Measure and record the generator floor longitudinal crack
at locations in units 3, 4, 5 and 10 every three months.
3. Survey and record horizontal and vertical movement of points
located on the generator floor over each wall between all
uni ts every six months.
These monitoring intervals are in accordance with FERC's region-
a 1 di rector's 1 etter of January 26, 1990, our 1 etter of February
22, 1990, and the March 13, 1990 confirmation phone discussion
wi th Mr Norm Wese 1 oh of the reg i ona 1 offi ce .
o Monitoring of the existing powerhouse during the new powerhouse
excavation includes:
- The current moni tori ng wi 11 be conti nued unti 1 the exi sti ng
powerhouse is stabilized, except during blasting for the new
powerhouse excavation. During this period, the monitoring ~
interval will be increased to daily for monitoring numbered (1),
every week for monitoring numbered (2), and monthly for monit-
ori ng numbered (3). However, if condi ti ons change for the
numbered (1) or (2) moni tori ng, then more frequent i nterva 1 for
monitoring numbered (3) will be established consistent with
need. Intervals for monitoring numbered (1) and (2) will also
be adjusted to reflect any changed condition.
- Read and record piezometers daily during blasting for the new
powerhouse excavation and existing powerhouse stabilization.
Monitoring intervals will be adjusted to reflect any changed
condition. At other times during new powerhouse construction,
monitoring will be less frequent, but responsive to encountered
condi ti ons.
- Seismic monitoring of the existing powerhouse for each blast
during new powerhouse excavation.
- Monitoring by one person and prompt dissemination of the in-
formation to those designated.
~~._.,-
'..
Mr Ronald A Corso
Page 3
March 16, 1990
o Pool lowering elevations during blasting for the new powerhouse
excavation will be established to satisfy requirements for the
existing powerhouse stability. The pool levels will be coordi-
nated with headwater concerns including irrigation.
"
o As-built drawings for the entire project, including the previously
constructed new spillway and tailrace channel, will be submitted
after project completion.
o Monitoring data will be summarized and provided to the Portland
Regional Office at the end of each month unless unusual instru-
mentation data deve10pes. When unusual readings of the instru-
mentation data occurs, it will be reported to the regional office
immediately, along with ~plans for assessing the significants of
the data as it may affect the projects structural integrity.
Correspondence on Swan Fall s was received on Ma rch 13, 1990, from
your regional office relative to Part 12, Safety of Water Power Projects.
However, our response to thi s matter wi 11 be addressed by separate letter.
Sincerely,
~£~¿(//J6).
Steven L Herndon
Attorney
SLH :EOG:cy
Encs
cc: Arthur Martin, FERC
Lee S Sherline, Leighton & Sherline
L E Lanham
E 0 Groff
..
SWAN FALLS PROJECT
IDAHO POWER COMPANY
FERC Project No 503
Idaho
PLAN AND SCHEDULE
Revised March 16, 1990
Subject
,1
Plan and schedule for constructing the new powerhouse and for modifying
the existing powerhouse.
Reference
Order Amend i ng license issued December 8, 1989, Project No 503-006,'
Articl e 304.
Schedule
Attached is a detailed schedule showing each activity of work. Also,
attached is a summary schedul e showing the project by major feature.
Plan
o Work began on January 22, 1990, to actively pursue the design, con-
struction and begin operation of the new 25 MW powerhouse as scheduled.
o The earlier 1980s design effort expended toward building the new plant.
at that time is being utilized to the fullest extent feasible. How-
ever, a review of each feature is being made to take advantage of
recent experience of similar plants and the latest technology for the
most efficient and safe construction and plant operation. The bulb
turbine with a speed incr,easer and high-speed generator has been
determined to be most cost effective and efficient for operation.
o The initial critical item is to develop specifications for a single
supply contract for the two 12.5 MW turbines with speed increasers,
generators and governors. Information from the turbine supplier for
turbine setting, water intake and waterway configurations is needed
earlier to finalize the powerhouse bid solicitation drawings. The
powerhouse contractor will install the turbines and associated equip-
ment with direction from the turbine erection engineer.
o The powerhouse contract will be awarded by April 15, 1991. The overall
excavation and concrete placing durations allow for winter weather in
1991-92 and 1992-93. Installation of the first turbine will begin by
Februa ry 1, 1993.
o Major accessory equipment will be supplied by individual contracts and
furnished to the powerhouse contractor for installation.
o Power on-l i ne is schedu 1 ed for the fi rs t un it on November 1, 1993, and
the second unit on January 1, 1994.
..
o The exi sti ng powerhouse wi 11 be operated unti 1 the first unit in the
new powerhouse is on line. Then the existing powerhouse will begin
decommissioning, turbine/generators and accessory equipment will be
removed, draft tubes and scro 11 cases wi 11 be fi 11 ed wi th concrete, one
complete generating unit will be prepared for public exhibit, and the
powerhouse superstructure will be repaired and preserved.
o The existing powerhouse is near the new powerhouse, some cracks have
developed in the structure, and stability of the structure is a concern
especi ally duri ng excavati on for the new powerhouse. Therefore, thisprogram is es tab 1 i shed. "
A. Prior to the new' powerhouse excavation:
- ~i ezometers for moni tori ng ex is t i ng powerhouse up 1 i ft under the
east bay adjacent to unit #10, and under the wall between units
#8 and 9 wi 11 be ins ta 11 ed.
- Concrete backfill will be placed in the east bay adjacent to
unit #10. Concrete backfill will also be placed in the bay
between un its #6 and #7 if it wi 11 not interfere with access
and operation of the powerhouse.
B. The current monitoring program for the existing powerhouse in-
cludes:
- Conti nuati on of the current crack moni tori ng that cons i sts of:
1. Read and record the Avongaard monitors at least once permonth. Additional measurements shall be taken prior to,
dLlring, and immediately after any dewatering activity or a
reservoir drawdown in excess of 3.5 feet. There are two
monitors located below the generator floor; one on the right
wall of unit #10, and one on the 1 eft wall of unit #7.
2. Measure and record the generator floor longitudinal crack
at locations in units 3, 4, 5 and 10 every three months.
3. Survey and record horizontal and vertical movement of points
1 oca ted on the genera tor floor over each wa 11 between all
units every six months.
These monitoring intervals are in accordance with FERC's region-
al director's letter of January 26, 1990, our letter of February
22, 1990, and the March 13, 1990 confirmation phone discussion
with Mr Norm Weseloh of the regional office.
C. Monitoring of the existing powerhouse during the new powerhouse
excavation includes:
- The current monitorina will be continued until the existing
powerhouse is stabiližed, except during blasting for the new
..
powerhouse excavati on. Duri ng thi s peri od, the monitoring
interval will be increased to daily for monitoring numbered (1),
every week for monitoring numbered (2), and monthly for monit-
ori ng numbered (3) . However, if condi ti ons change for the
numbered (1) or (2) moni tori ng, then more frequent i nterva 1 formonitoring numbered (3) will be established ~consistent with
need. Intervals for monitoring numbered 0) and (2) will also
be adjusted to reflect any changed condition.
- Read and record piezometers daily during blasting for the new
powerhouse excavation and exi sting powerhouse stabi iization.
Monitoring intervals will be adjusted to reflect any changed
condition. At other times during new powerhouse construction,
mon i tori ng wi 11 be 1 ess frequent, but respons i ve to encountered
conditions.
- Seismic monitoring of the existing powerhouse for each blast.
during new powerhouse excavation.
- Monitoring by one person and prompt dissemination of the in-
formation to those designated.
D. Pool lowering elevations during blasting for the new powerhouse
excavation wi 11 be establ ished to satisfy requirements for the
existing powerhouse stability. The pool levels will be coordi-
nated with headwater concerns including irrigation.
o As-built drawings for the entire project, including the previously
constructed new spillway and tailrace channel, will be submitted after
project completion.
o Monitoring data will be summarized and provided to the Portland Region-
al Office at the end of each month unless unusual instrumentation data
deve lopes. When unusual readi ngs of the ins trumentati on data occurs,
it will be reported to the regional office immediately, along with
plans for assessing the significants of the data as it may affect the
projects structural integrity.
o The entire project will be completed by October 1, 1994.
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BEFOR Tl
IDAHO PUUC UTES COMSI
CASE NO. IPC-E-92
SlPl TO NTAL APPUCA TI
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IDAH POWER CQANY
A TT ACl 5
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..FEDERAL ENERGY REGULATORY COMMISSION
WASHINGTON. 0, C. 20426
lI 26 199
Project No. 503
Swan Falls Dam
Idaho Power Company
Mr. Steven L. HerndonAttorney
Idaho Power Company
P.O. Box 70
Boisei Idaho 83707
Dear Mr. Herndon:
We have received your letter dated March 16, 1990 submitting
your revised plan and schedule for construction of the new
powerhouse and stabilization of the existing powerhouse at the
Swan Falls Project No. 503. The revised schedule and the
features of the revised plan are acceptable.
The revised schedule i presented as option 2 in our March 12,
1990 meeting i indicates completion of the powerhouse
stabilization one year earlier than that presented in the
previous schedule of January 22 i 1990. The revised plan
adequately addresses instrumentation and monitoring programs
during construction, concrete backfilling in the east bay and the
bay between units no. 6 and 7 during the early phases of
construction i and reservoir drawdown during blasting for the newpowerhouse.
Sincerely,~ai~
Ronald A. Corsoi Director
Division of Dam Safety andInspections
AT 5SUPPL ~.'I INTI APCAION