20090615Application.pdf

EXECUTIVE OFFICES
INTERMOUNTAIN GAS COMPANY
555 SOUTH COLE ROAD. P.O. BOX 7608. BOISE, IDAHO 83707. [phone]. FAX: [phone]
June 15, 2009
RECEIVED
ZOg JUN 15 PH 3= 21
IDAHO PUSl.C
UTILITIES COMMISSIC
Ms. Jean Jewell
Commission Secretary
Idaho Public Utilities Commission
472 W. Washington S1.
P.O. Box 83720
Boise, 10 83720-0074
RE: Intermountain Gas Company
Case No. INT-G-09-01
OearMs. Jewell:
Enclosed for filing with this Commission are a signed original and seven copies of
Intermountain Gas Company's Application and supporting Workpapers for Authority to
Establish a Hook-up Fee along its Sun Valley LateraL.
Please acknowledge receipt of this filing by time stamping and returning a photocopy of this
Application cover letter to us.
If you have any questions or require additional information regarding this Application,
please contact me at [phone].
MPM/sc
Enclosures
cc: F. Morehouse
E. N. Book
S. Madison
T. Clark
RECEIVED
28ll JUN f 5 PH 3= 26
10 P ie
INTERMOUNTAI GAS COMPANY UTiLlT C ISSION
CASE NO. INT-G-09-01
APPLICATION,
EXHIBIT
AND
WORKAPERS
In the Matter of the Application of INTERMOUNTAIN GAS COMPANY
for Authority to Establish a Hook-up Fee along its Sun Valley Lateral
Morgan W. Richards, Jr., ISB NO.19B
RICHAS LAW OFFICE
804 East Pennsylvana Lane
Boise, Idaho 83706
Telephone: [phone]
Facsimile: [phone]
Attorney for Intermountain Gas Company
REceIVED
ZOOt JUN '5PI1 3: 30
UTIL~~~iOt ie
ISS10N
BEFORE THE IDAHO PUBLIC UTILITIES COMMISSION
In the Matter of the Application of
INERMOUNTAI GAS COMPAN
for Authority to Establish a Hook-up Fee
alon its Sun Valley Lateral
Case No. INT.G-09-01
APPLICATION
Intermountain Gas Company ("Intermountain" or "Company"), a subsidiar of MDU
Resources Group, Inc. with general offices located at 555 South Cole Road, Boise, Idaho, hereby
requests authority, pursuant to Idaho Code Sections 61-307 and 61-622, to place into effect July 15,
2009 a new Rate Schedule. The proposed schedule would require new customers, whose estimated
peak usage on the Company's Sun Valley Lateral exceeds the average peak-day usage on the
Lateral, to pay a fee for the disproportionate amount of incremental distrbution system plant
investment that these new customers utilize. Intermountain's earngs will not change as a result of
the proposed new Rate Schedule. Intermountain's proposed Rate Schedule is attached hereto as
Exhibit No. 1 and is incorporated herein by reference.
Communcations in reference to this Application should be addressed to:
Michael P. McGrath
Director - Gas Supply & Regulatory Affairs
Intermountain Gas Company
Post Offce Box 7608, Boise, ID 83707
and
Morgan W. Richards, Jf.
Richards Law Offce
804 East Pennsylvana Lane
Boise, ID 83706
In support of this Application, Intermountain does allege and state as follows:
APPLICATION - 2
I.
Intermountai is a gas utility, subject to the jursdiction of the Idaho Public Utilties
Commission, engaged in the sale of and distrbution of natual gas withi the State of Idaho under
authority of Commission Certificate No. 219 issued December 2, 1955, as amended and
supplemented by Order No. 6564, dated October 3, 1962.
Intermountain provides natual gas service to the following Idaho communties and counties
and adjoining areas:
Ada County - Boise, Eagle, Garden City, Kuna, Meridian, and Star;
Bannock County - Chubbuck, Inom, Lava Hot Springs, McCammon, and Pocatello;
Bear Lake County - Georgetown, and Montpelier;
Bingham County - Aberdeen, Basalt, Blackfoot, Firt, Fort Hall, Morelandlverside, and Shelley;
Blaine County - Bellevue, Hailey, Ketchum, and Sun Valley;
Bonneville County - Amon, Idaho Falls, Iona, and Ucon;
Canyon County - Caldwell, Greenleaf, Middleton, Nampa, Parma, and Wilder;
Caribou County - Bancroft, Conda, Grace, and Soda Springs;
Cassia County - Burley, Declo, Malta, and Raft River;
Elmore County - Glenns Ferr, Hammett, and Mountain Home;
Fremont County - Parker, and St. Anthony;
Gem County - Emmett;
Gooding County - Gooding, and Wendell;
Jefferson County - Lewisville, Menan, Rigby, and Ririe;
Jerome County - Jerome;
Lincoln County - Shoshone;
Madison County - Rexburg, and Sugar City;
Minidoka County - Heyburn, Paul, and Rupert;
Owyhee County - Bruneau, Homedale;
Payette County - Fruitland, New Plymouth, and Payette;
Power County - American Falls;
Twin Falls County - Buhl, Filer, Hansen, Kimberly, Murtugh, and Twin Falls;
Washington County - Weiser.
Intermountain's properties in these locations consist of transmission pipelines, a liquefied
natual gas storage facility, distrbution mains, services, meters and regulators, and general plant
and equipment.
II.
Intermountai Gas Company has, and continues, to make substantial capital upgrades to its
Sun Valley Lateral in order to serve the daily natual gas needs of all its Sun Valley Lateral
customers. By way of recent examples, in 2003 Intermountain provided 15 miles of "uprate" along
APPLICATION - 3
the Lateral at a cost of $675,000. In 2005, Intermountain again uprated the Sun Valley system along
an additional 33.5 miles at a cost of$550,000.
in.
Today, the Sun Valley Lateral is operating at near system capacity. The physical
deliverability and demand characteristics of the Sun Valley Lateral are unque. Curently, 97% of
the demand on the Lateral is contained with the last (nortern) 15 miles of the 68 mile LateraL.
Due to the physical natue of providing distrbution servce to an "end-of-the-line" customer,
distrbution system upgrades in the Ketchum and Sun Valley, Idaho areas, which are necessar to
provide for contiued customer growt, become more expensive. Adding to the unqueness of the
KetchumSun V alley area, much of the planed growt in the area is for "seasonal" homes much
larger than an average sized residence. Whle the occupancy of these large seasonal homes do not
generate year-round revenue for the Company, these homes none-the-Iess require the same
commitment by the Company to provide for the customer's peak-day natual gas needs. The next
planed distrbution system upgrade off the main Sun Valley Lateral is the "Ketchum Uprate"
planed to be completed in 2009. This distrbution system upgrade will provide for 16,000 therms
per day of incremental distrbution capacity to new Ketchum and Sun Valley, Idaho customers at an
estimated cost of $640,000, or $40.00 per incremental thermo
IV.
The uprate of a natual gas pipeline is the process required to increase the allowable
operating pressure of a pipeline segment whereby the pipe segment is subjected to assessments
mandated by federal regulations. Upon completion of an uprate the pipeline segment subjected to
the assessment may operate at, and not exceed, the newly established allowable operating pressure.
The paricular assessment hereto is described as a pressure test in adherence to federal regulation
known as CFR Title 49, Par 192, Subpar J.
v.
Intermountain seeks with this Application to establish a Hook-up Fee requirng new
customers, whose estimated peak-day usage on the Company's Sun Valley Lateral exceeds the
average peak-day usage on the Lateral, to pay a fee for their disproportonate share of the
incremental distrbution system plant investment constrcted in order to serve the needs of these
new customers.
APPLICATION - 4
The customers who wil be subject to the proposed Hook-up Fee will be the same new
customers causing the need for, and who directly benefit from, additional Sun Valley Lateral
distrbution system capital upgrades. Additionally, the Company has defined a specific
geographic region subject to the proposed Hook-up Fee as more fully described on pages 2 and 3
of the attached Exhibit NO.1. This defined geographic region is the same area directly benefiting
from the before mentioned Ketchum Uprate.
VI.
Whle the average peak-day usage per customer along the Lateral is 15.5 therms per day
(see Company's Integrated Resource Plan on file at the Commission), the natue of the new
customer growth (primarly due to the large size of the planed KetchumSun Valley area
domiciles) is such that the demands each new customer can place on the Lateral can far exceed the
average 15.5 therms per day. New customers, the Company contends, should pay a Hook-up Fee
based on the demands they place on the Lateral that go above-and-beyond this 15.5 therms per
day Sun Valley Lateral system average.
VII.
The Company has determined the boundares that a new customer's peak-day demand can
place on the Sun Valley LateraL. The upper end of this range can be established by using a
sumation of the hourly mechancal ratings of the customer's proposed natual gas equipment
which represents the "mechancal potential" for hourly peak consumption of that new customer.
The lower bounda was estimated by using a regression analysis that correlated hourly natual gas
usage for customers on the Sun Valley Lateral to the customers' installed natual gas equipment
ratings. Ths study supported a lower range of the customers' hourly demand needs, based on
equipment ratings, as being approximately 50% of what would otherwise be possible based on the
"mechancal potential" of the equipment alone. The results of ths study are included in Workpaper
No. 1 which is attached hereto and incorporated herein by reference. The above methodologies
purosely excluded any natual gas consumed for the purose of providing snowmelt. The
Company contends that the application of the proposed Hook-up Fee should not provide for un-
interrpted servce for the purposes of snowmelt.
Intermountain Gas Company proposes herein, based on the lower range of its study, to
establish a new KetchumSun Valley area customer Hook-up Fee by takg 50% of the customer's
APPLICATION - 5
proposed mechancal equipment ratings, multiplied by 20 hours, to arve at the customer's natual
gas peak-day consumption needs. If the result ofthis calculation exceeds the before mentioned 15.5
therms per day, the customer will be charged for that excess (above average peak-day usage) at the
before mentioned cost of $40.00 per peak-day thermo
Workpaper NO.2 provides examples of the calculation of the proposed Hook-up Fee.
Workpaper NO.2 is attached hereto and incorporated herein by reference.
VIII.
Any collected Hook-up Fee will be applied as a reduction to the distrbution system plant
investment (rate base) provided to serve the incremental KetchumSun Valley area customers
thereby avoiding any cross-subsidies that would otherwise occur to pay for any above average
customer usage.
ix.
The Company proposes to adminster the Hook-up Fee pursuat to the proposed Rate
Schedule beginnng at the time the Rate Schedule would become effective. Therefore, the Fee will
be intially set based on the estiated cost of constrction of the Ketchum Uprate Project, or
$640,000. Intermountai will come before the Commission with a revised Rate Schedule reflecting
the actual cost of the Ketchum Uprate once those figues are known by the Company. If ths revised
Rate Schedule results in a Hook-up Fee lower than the Hook-up Fee originally approved by the
Commssion, and subsequently charged to a customer, Intermountain would make a refud to that
customer based on the lower Fee. If, however, the revised Rate Schedule results in a higher Hook-
up Fee as compared to what was origially biled the customer, Intermountain proposes to not
charge that customer for any difference caused by the higher Fee.
Additionally, the Company wil come before ths Commssion as necessar tò update the
proposed Rate Schedule to reflect the next increment of KetchumSun Valley area distrbution
system plant investment which wil be required as prior system upgrades become full and reach
their deliverable maximum.
x.
The proposed Rate Schedule requested herein is a just, fair, and equitable pass-through of
those costs made in order to serve the above normal demands of KetchumSun Valley area
customers. To do otherwise, Intermountain contends, would cause undue subsidization and
APPLICATION - 6
upward price pressure on those customers not directly benefiting from the KetchurnSun Valley
area distribution system upgrades.
XI.
This Application is fied pursuant to the applicable statutes and the Rules and Regulations
of the Commission. This Application has been brought to the attention of Intermountain's
customers through a News Release sent to daily and weekly newspapers in Intermountain's service
area impacted by the proposed rate schedule. The News Release is attached hereto and incorporated
herein by reference. Copies of this Application, its Exhibit, and Workpapers have been provided to
those governental bodies whose jursdictional area would be directly impacted by the proposed
rate schedule.
XII.
Intermountain requests that this matter be handled under modified procedure pursuant to
Rules 201-204 ofthe Commission's Rules of Procedure. Intermountain stands ready for immediate
consideration ofthis mattef.
APPLICATION - 7
WHREFORE, Intermountain respectfully petitions the Idaho Public Utilities Commission
as follows:
a. That the proposed Rate Schedule herewith submitted as Exhibit No. 1 be approved
without suspension and made effective as of July 15, 2009 in the maner shown on Exhibit No.1.
b. That ths Application be heard and acted upon without hearg under modified procedure,
and
c. For such other relief as ths Commssion may determine proper herein.
DATED at Boise, Idao, ths 15th day of June, 2009.
INTERMOUNTAI GAS COMPAN Morgan W. Richards, Jr.
y1By
Morgan W. chards, Jr.
Attorney for Intermountain Gas Comp
APPLICATION - 8
CERTIFICATE OF MAING
I HEREBY CERTIFY that on ths 15th day of June, 2009, I served a copy of the
foregoing Case No. INT-G-09-01 upon:
Mayor Randy Hall
Box 2315
Ketchum, Idaho 83340
Mayor Wayne Willich
Box 416
Sun Valley, Idaho 83353
by depositing tre copies thereof in the United States Mail, postage prepaid, in envelopes addressed
to said persons at the above addresses.
APPLICATION - 9
WORKAPERNO.l
CASE NO. INT -G-09-01
INTERMOUNTAIN GAS COMPANY
Regression Analysis Study
(8 pages)
~... INTERMOUNTAIN
"" GAS COMPANYA_oI___,"'
Workpaper NO.1
Case No. INT-G-09-01
Intermountain Gas Company
Page 1 of 8
Ketchum/Sun Valley Usage Study
1.1 Scope
This paper describes the overall process and results for a usage study that was
done on the KetchumSun Valley distrbution system, more specifically;
customers fed from Regulator Stations 633 and 6300 as of March 2009. The
study was performed with the intent to determine a percentage of the natural
gas equipment rating a residence uses on a projected peak-day and identify any
correlations associated with the projected usage.
1.2 Data Collection
Because it is unealistic for a customer to use 100% of the equipment ratings
for all of the appliances within the residence at one given time, IGC
Engineering completed a study to determine what realistic percent of the total
equipment rating a customer would use on a "Peak-Day". Approximately 18%
of new RS2 and GSll customers that came online from November 2003 to
February of2009 were used in the study (82 of 450). The following is the
criteria used in selecting the sample of customers:
. RS 1 and LV customers were filtered out
. Customers that used less than 20% or over 80% of their equipment
rating were considered bad data and filtered out
. Customers that did not have documented equipment ratings were
filtered out
. Snowmelt was removed from the equipment rating
. Constrction heat loads were fitered out
. Monthly usages from the winter months of2003 to February of 2009
were used
The data used in the study can be found in Attachment A.
1
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'" GAS COMPANY'_01_"""",,,
Workpaper NO.1
Case No. INT-G-09-01
Intermountain Gas Company
Page 2 of 8
For each ofthe customers used in the study the following data was collected
from the IGC database:
. Equipment rating
. Service line number
. Square footage of the residence
. Maximum monthly usage
. Read date for when the maximum usage occured
. Biling days for when the maximum usage occured
. Average Heating Degree Day (HDD) when maximum usage occured
2
~A INTERMNTAIN
"" GAS COMPANY, A_ulMI__..
Workpaper No.1
Case No. INT-G-09-01
Intermountain Gas Company
Page 3 of 8
1.2.1 Average Heating Degree Day
The Average "Heating Degree Day" (HD) was found using
AccuWeather's historical database which gives a calculated HDD
for days that were used durng the study. In order to get to an
average HDD for the billing cycle, the HDDs were averaged from
the time ofthe read date to the time of the previous read date by
using the number of biling days for that paricular meter read.
1.3 Projected Peak Daily and Hourly Usage
Once all of the pertinent data was collected, the Actual Maximum Daily Usage
was found by first taking the Maximum Monthly Usage for the specific
residence and dividing it by the number of biling days for the read cycle. In
order to convert the Actual Maximum Daily Usage to a Projected Daily Peak
Usage, the Average HDD and Actual Maximum Daily Usage needed to be
increased to represent a Projected Peak Daily usage based on an 86 HDD. This
was done by factoring in the base load (10% of the peak load) and using a
linear fuction (y=x+b) with the Average HDD and Actual Maximum Daily
Usage. In order to get to a Projected Peak Hourly Usage, the Maximum
Projected Daily Usage was divided by a 20 hour day.
1.4 Discussion of Results
After analyzing the data that was gathered for the usage study, the calculated
Projected Peak Hourly Usage as a percent ofthe Equipment Rating was plotted
against the square footage of the residence. There was no correlation between
the hourly usage and the square footage and the results are shown in Figue 2.
3
~.. INTERMOUNTAIN
" GAS COMPANY, A_d""_Gr..
Workpaper NO.1
Case No. INT-G-09-01
Intermountain Gas Company
Page 4 of 8
Figue 2: Square Footage Comparson
Historical Data for Customer Usage in Ketchum/Sun Valley
16.00
2.00
14.00
12.00-..::0..-
E 10.00..
CI
03-2009 Data..~ear (2003-2009 Data)CICll'I/8.00:i
)(l'
:E
'0
CI 6.00..(,
CI...0..
Q.
4.00
0.00
o 2,000 4,000 6,000 8,000 10,000 12,000
Square Footage
Based on the R2 value of 0.345, no useable correlation exists between the square
footage of the residence and the Projected Max Hourly Usage.
The Projected Hourly Usage was then plotted against the Equipment Rating and the
results can be seen in Figure 3.
4
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f' GAS COMPANYASUolMD1ln:Gr,/n
Workpaper NO.1
Case No. INT-G-09-01
Intermountain Gas Company
Page 5 of 8
Figure 3: Hourly Usage and Equipment Rating
Historical Data for Customer Usage in Ketchum/Sun Valley
16.00
2.00
3-2009 Data
ear (2003-2009 Data)
14.00
12.00
"i::o.c
E 10.00..
Gl.c~
GlClClUl 8.00::
~::
'0
Gl-U
Gl
'ê'ii
6.00
4.00
0.00
o 5 10 15 20 25 30
Equipment Rating (therm/hour)
Figue 3 shows that the correlation between the Projected Max Hourly Usage
and the Equipment Rating is linear with an R2 value of 0.75. Although an R2
value of 1.0 is considered perfect when fitting data to a fuction, a value of
0.75 shows that the fuction is a good representation ofthe data based on the
varables and circumstances ofthe data being used.
5
~Â. INTERMUNTAIN
"., GA COMPANY
A Sl 01 MO R8Tr Gi, In
Workpaper No.1
Case No. INT-G-09-01
Intermountain Gas Company
Page 6 of 8
1.5 Conclusion
Based on the results from the usage study, an average customer without
snowmelt uses approximately 50% of their total equipment rating on a peak
HDD. The projected peak usage based on the customer's equipment rating can
be approximated by using the following equation:
Project Peak Usage (th/hr) = 0.47 * (Total Equipment Rating (th/hr)) - 0.29
6
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Workpaper NO.1
Case No. INT..G-09-01
Intermountain Gas Company
Page 8 of 8
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WORK APER NO.2
CASE NO. INT-G-09-01
INTERMOUNTAIN GAS COMPANY
Hook-up Fee Examples
(l page)
Workpaper NO.2
Case No. INT-G-09-01
Intermountain Gas Company
Page 1 of 1
INTERMOUNTAIN GAS COMPANY
Examples of the proposed Ketchum/Sun Valley Area Hook-up Fee
Example #1 Example #2 Example #3
Line 4,000 fe 11,000 fe Commercial
No.Description Residential (1)Residential (1)Application (2)
(a)(b)(c)(d)
1 Summation of Therm-per-hour Ratings for all Installed Equipment 3.5 25.0 14.9
2 Times: the Average Equipment Utilization Factor 50%50%50%
3 Average Peak Hourly Usage 1.8 12.5 7.5
4 Times: the Hourly to Peak-day Conversion Factor 20 20 20
5 Projected Peak Therm Use 36.0 250.0 150.0
6 Less: the Average Sun Valley Lateral Peak-day Usage 15.5 15.5 15.5
7 Sample Customer Projècted Peak-day Over Average Peak-day 20.5 234.5 134.5
8 Times: the Average Cost per Therm for Incremental Capacity Upgrade $40.00 $40.00 $40.00
9 Total Hook-up Fee $820.00 $9,380.00 $5,380.00
(1) Reflects a typical residential application for the identified square footage (excluding any snowmelt use).
(2) Reflects a 5,000 square foot commercial application (excluding any snowmelt use).