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Home My WebLink About20080827INT to Staff 1-4, 9-11, 16-35.pdfEXECUTIVE OFFICES INTERMOUNTAIN GAS COMPANY 555 SOUTH COLE ROAD. P.O. BOX 7608. BOISE, IDAHO 83707. (208) 377-6000. FAX: 377-6097 Itt .'\" 51 August 25, 2008 Jean Jewell Commission Secretary Idaho Public Utilities Commission 472 West Washington St. P. O. Box 83720 Boise,ID 83720-0074 RE: First Production Request of the Commission Staff to Intermountain Gas Company Case No. INT-G-08-02 Dear Ms. Jewell: Attached for filing with the Idaho Public Utilities Commission are the original and seven copies of Intermountain Gas Company's response to the remaining questions from The First Production Request of the Commission Staff in the above referenced Case. This transmittal in combination with the company's August 20th responses represents a full response to the Staff's First Production Request. If there are any questions regarding the attached, please contact me at (208) 377-6168. MPM/sc Attachments cc Scott Madison Request No.1: Based on the calculations to derive the "/GC commercial multiplier rate ",...does t~ historical relationship between new construction and commercial growth display a signifc'5t corr~tation? If so, please explain which years were used, and the significance of the correlation. (IRP ø.~ 9Y;;;~:::..);; _~:~~:_c t:-...... Record Holder: Responder:Byron Oefenbach Ph 377.6080 Michael McGrath Intermountain Gas Company 555 S. Cole Rd. Boise, 10 83709 Ph 208-377-6168 Byron Oefenbach --",..,Y., i../ -tJI-J- Witness: Response: There is a relationship between historical new residential construction and commercial growth, and the forecast commercial growth in the 2008 IRP does bear a significant correlation. Please see "Request NO.1 Exhibits 1.1 and 1.2". Exhibit 1.1 depicts the Residential and Commercial sales history going back to Fiscal Year 1990, and the percentages of Commercial new construction sales relative to Residential new construction sales. Exhibit 1.2 depicts the percentage of Commercial new construction sales to Residential new construction, as forecast in the 2008 i RP. In the Exhibit 1.1 history, the ranges vary across IGC's operating regions. As housing grew during the 1990's and through 2006, the Commercial sales percentage declined as the Residential proportion of sales grew. That would make sense given the speculative housing boom in Fiscal '05 and '06, followed by the rapid decline in new housing starts in Fiscal '07. Commercial growth trails cyclical to household growth by a year or so. In Exhibit 1.2, the IRP Forecast shows some regional differences in proportion and direction. In all three of IGC's operating regions, the IRP forecast Commercial sales percentage is lower than that experienced during Fiscal 07, and is higher than the three-year average. That is within our expectations. Request No.2: The Company uses the Idaho Economic Forecast published by John S. Church, dated May 2007 for its 2008 IRP. Did Mr. Church publish a later or updated Forecast? (IRP page 11) If so, why wasn't this used? If not, have other data providers been considered? Responder:Byron Oefenbach Ph 377.6080 Michael McGrath Intermountain Gas Company 555 S. Cole Rd. Boise, 10 83709 Ph 208-377-6168 Byron Oefenbach Record Holder: Witness: Response: Mr. Church frequently updates his publication between IRP filings and Intermountain utilzes these updates on an as-needed basis for non-IRP forecasts. Intermountain strives to use the freshest data possible in the IRP but nearly every step in the IRP process is reliant upon some previous work. Therefore the Company must make decisions based on the data available at a given time and then must progress forward in the process to the next step. Mr. Church did provide Intermountain with an updated forecast in late May 2008 but since the customer forecast is one of the foundations that the IRP is built upon, Intermountain had already utilized the 2007 Forecast to complete its IRP customer projection during the fall of 2007. However, the inclusion of high and low growth scenarios help to ensure that any material variation in a future Forecast Page 1 update will likely be included within the high and low bands. This helps the Company to mitigate the effects that any such variation might cause. The Idaho Economic Forecast is highly respected forecast and Mr. Church is sought after as an expert on local and regional economic issues. His work is utilized by many private and public organizations seeking to better understand the economic dynamics of this region. The Idaho Economic Forecast provides very discreet forecast household and population growth data relative to IGC's specific operating regions. The Company has evaluated other sources for the needed forecast data; however, no other source met the Company's in that it includes data that is readily available and current yet also includes detail specific to the counties and communities the Company serves in Idaho. Therefore, as of today no other state or regional forecast has been nearly as useful and practical as the Church forecast. Request No.3: How often does Wells Fargo report on building permits used to calculate household growth? (IRP page 18). Responder:Byron Oefenbach Ph 377.6080 Michael McGrath Intermountain Gas Company 555 S. Cole Rd. Boise, 10 83709 Ph 208-377-6168 Byron Oefenbach Record Holder: Witness: Response: The Wells Fargo report is produced monthly. Request No.4: Please explain how Wells Fargo and IGC's market penetration rates have been reconciled to come up with a final forecast. (IRP page 18). Responder:Byron Oefenbach Ph 377.6080 Michael McGrath Intermountain Gas Company 555 S. Cole Rd. Boise, 10 83709 Ph 208.377.6168 Byron Oefenbach Record Holder: Witness: Response: IGC Regional Market Penetration Reports (Request NO.4 Exhibits 4.1, 4.2, 4.3) are compared to the Wells Fargo permit totals (Request NO.4, Exhibits 4.4, 4.5, 4.6) to gauge the accuracy of the internally derived figures. The Regional reports are the primary driver of the derivation of market penetration rates. Request No.9: When forecasting industrial customers' consumption (IRP 31): a) What... "other forecast data was then utilzed to adjust the survey data base for two of the three forecasts (Base Case and Low Growth)"? b) Please provide the "other forecast data" used in forecasting this group of customers and describe how it was utilzed. Responder:Brent Wilde Ph. 377.6053 Michael McGrathRecord Holder: Page 2 Witness: Intermountain Gas Company 555 S. Cole Rd. Boise, 10 83709 Ph 208-377-6168 Brent Wilde Response: a) "Other forecast data" includes things such as face-to-face or phone conversations with the customer relating to their actual usage patterns and/or future plans which may affect consumption, general market trends or other anecdotal evidence. The past three-to-five year history of consumption for each customer was compared to customer projections, when information provided the customer, or by Mr. Wilde when no projections were provided. These comparisons help to strengthen the forecast. b) The "other forecast data" includes things that are not generally contained in documents format. However, Intermountain uses such information to make frequent updates to its forecasts and analyzes the customers' usage projections using this type of data. An example of this type of analysis can be seen on Request NO.9, Exhibit 9.1. Request No. 10: Within IGC's forecasts, how have consumption differences among different days in the week been considered? Responder:Lori Blattner Ph 377-6000 Michael McGrath Intermountain Gas Company 555 S. Cole Rd. Boise, 10 83709 Ph 208-377-6168 Lori Blattner Record Holder: Witness: Response: Consumption differences between weekdays and weekend days have been accounted for by testing a weekend binary variable. This weekend binary variable statistically measures the difference in consumption between weekdays and weekend days. The variable is 1 for weekend days and 0 for weekdays. The weekend binary variable was a significant explanatory variable for the November, December, and January peak day models (see IRP Exhibit 2, Appendix A). Request No. 11: With regards to DSM analysis (IRP page 64): a) What research was conducted throughout the 90s indicating DSM actions did not present a clear sensible solution? b) Is there more recent research confirming this? If so, please provide it. Responder:Byron Oefenbach Ph 377-6080 Michael McGrath Intermountain Gas Company 555 S. Cole Rd. Boise, 10 83709 Ph 208-377-6168 Byron Oefenbach Record Holder: Witness: Response: IGC conducted a DSM study in the early '90s employing AUS Consulting to perform the detailed analytical work. As a result, IGC filed an application to start a pilot low-flow showerhead and Page 3 faucet aerator DSM program. In IPUC Order No. 26546 per Case No. INT-G-96-04, dated August 1, 1996, the IPUC denied IGC's application for that DSM program, citing changes in practices and technology which had transformed the marketplace, thus rendering certain DSM programs no longer necessary or supportable at that time. No subsequent research had been performed until 2007, when IGC engaged Navigant Consulting to assist with the DSM analysis ordered after the filing of our 2006 IRP. (See also the response to Request No. 12) Request No. 16: Has research been completed differentiating between households replacing equipment prior to burning out vs. replacement following burning out in evaluating DSM program success? Responder:Byron Oefenbach Ph 377-6080 Michael McGrath Intermountain Gas Company 555 S. Cole Rd. Boise, 10 83709 Ph 208-377-6168 Byron Oefenbach Record Holder: Witness: Response: A customer replacing a burned-out furnace with a new one, and at the same time taking advantage of a DSM program incentive to do so, could be considered a form of free-ridership. They would have replaced the furnace anyway, so the cost decision only relates to the incremental net cost of purchasing a furnace covered by the DSM program, and not the entire cost of a new furnace. Navigant's work includes an evaluation of free-ridership in the measures analysis. IGC feels that there are two situations which provide an opportunity to gain a conversion customer. One is when a customer's existing furnace burns out, and they are compelled to replace it. We call this a "mandatory replacement". The other is when a customer chooses to replace a perfectly-good, functioning furnace because of other reasons, such as cheaper operating costs. We call this a "discretionary replacement". Intermountain believes that overall conversions have declined, in part, because the closer alignment of natural gas and electrical prices has largely eliminated the real or perceived advantage to be gained by a discretionary replacement. Intermountain does provide most of the mandatory replacement conversions. Request No. 17: With regards to the Gas Equipment Financing Program in place on previous IRPs (2004 IRP Staff Comments page 4 and 2006 IRP page 61): a) Has IGC considered reinstituting a gas equipment financing program through Wells Fargo Bank which provided current and prospective customers with an equipment financing avenue that included competitve rates and an expedited approval process? If not, why not? b) Why was this program eliminated? Responder:Byron Oefenbach Ph 377-6080 Michael McGrath Intermountain Gas Company 555 S. Cole Rd. Boise, 10 83709 Ph 208-377-6168 Byron Oefenbach Record Holder: Witness: Response: a) We have not considered reinstituting a gas equipment financing program through Wells Fargo that would include competitive rates and an expedited approvaL. The Wells program did not Page 4 appear to provide any significant advantage over manufacturer or dealer financing over the years, and its utilization level never reached expectations. b) Based on those low participation levels, Wells Fargo decided to eliminate the IGC Finance Program. Request No. 18: Please provide the list of DSM programs and opportunities Navigant Consultng evaluated (IRP page 65). Responder:Byron Oefenbach Ph 377-6080 Michael McGrath Intermountain Gas Company 555 S. Cole Rd. Boise, 10 83709 Ph 208-377-6168 Byron Oefenbach Record Holder: Witness: Response: Please see the attached list of Navigant's DSM Program Opportunity Analysis (Request No. 18, Exhibit 18.1). Request No. 19: What types of weatherization assistance programs does IGC participate in to reduce gas consumption? Responder:Byron Oefenbach Ph 377-6080 Michael McGrath Intermountain Gas Company 555 S. Cole Rd. Boise, 10 83709 Ph 208-377-6168 Byron Oefenbach Record Holder: Witness: Response: Intermountain supports the concept of best energy use and the practice of efficient use of natural gas. While Intermountain does not participate directly with any weatherization assistance programs it does, through its customer service efforts, assist customers by directing them to appropriate organizations that may help customers in their conservation efforts. The Company's website makes available a wealth of conservation information and Intermountain often provides customers seasonally relevant information through direct mailings such as bill stuffers. Intermountain also provides indirect support to the assistance agencies in our service territory through sponsoring training and meetings and by fund-raising and awareness activities like Project Share, Project Warmth, Season of Hope, and Coats for Kids. The Company also promotes weatherization through its partnership with Energy Star. Request No. 20: What milestones are in place for IGC to evaluate, consider, reach a decision, and implement the following (IRP page 66): a) $30 rebate when a homeowner converts to a natural gas water heater from another energy source, and installs a . 64-or-greater energy factor (EF) gas water heater? b) $200 rebate when an existing customer replaces a below 90% efficiency natural gas furnace with a 90%-or-greater efficiency natural gas furnace? c) $30 rebate when an existing customer replaces a . 59-or-below EF natural gas water heater with a .64-or-greater EF natural gas unit? Responder:Byron Oefenbach Page 5 Record Holder: Witness: Ph 377-6080 Michael McGrath Intermountain Gas Company 555 S. Cole Rd. Boise, 10 83709 Ph 208-377-6168 Byron Oefenbach Response: Regarding the three DSM programs cited, milestones considered by IGC include the determination of a specific geographic area in which to perform the potential pilot programs. In this case, the Idaho Falls lateral was proposed as potential target market. The establishment of a technical potential by Navigant in their work for that region has also been an important milestone in determining costs and therm savings. Another important milestone was determining whether the equipment covered by the DSM program was widely available in the target region. The outcome of further discussions with IPUC Staff, and the direction provided by that interaction will be important for setting further milestones in the DSM process. Request No. 21: Does IGC offer any rebate incentives to encourage existing customers who have to replace efficient equipment (90%-or-greater furnace, . 64-or-greater water heater) to choose new efficient equipment in their replacement? If not, why not? If so, please provide a description of the program (IRP page 66) Responder: Record Holder: Witness: Byron Oefenbach Ph 377-6080 Michael McGrath Intermountain Gas Company 555 S. Cole Rd. Boise, 10 83709 Ph 208-377-6168 Byron Oefenbach Response: Intermountain has not considered rebate incentives for existing customers. If a customer already has high efficiency equipment and they are satisfied with it, we assume they would replace it with similar or better equipment without receiving any rebate. Request No. 22: How does IGC evaluate and determine the appropriate rebate amount on any given DSM efficiency program? Responder: Record Holder: Witness: Byron Oefenbach Ph 377-6080 Michael McGrath Intermountain Gas Company 555 S. Cole Rd. Boise, 10 83709 Ph 208-377-6168 Byron Oefenbach Response: Intermountain believes that if an efficiency upgrade makes economic sense for the customer, that is, it provides an economic payback to the customer within the expected life of the upgrade, the Company need not offer more than 30% of the incremental cost of the upgrade. Page 6 Request No. 23: What avoided cost projections has IGC made to evaluate current and future DSM programs? Please explain. Responder:Byron Defenbach Ph 377-6118 Michael McGrath Intermountain Gas Company 555 S. Cole Rd. Boise, 10 83709 Ph 208-377-6168 David Swenson Record Holder: Witness: Response: The 20081RP was based on the assumption that, at a minimum, the benchmark for DSM savings would be based on the then current WACOG of $.63583 per thermo That WACOG benchmark was used by Navigant for the Avoided Cost study. Request No. 24: With regards to the elimination of the T-1 and T-2 tariffs, and the introduction ofthe T-5 tariff: a) Wil the "Transportation Capacity" section of the IRP change? Please explain. (IRP page 47). b) What implications wil the changes have given the statement that "All current customers were assumed to remain on their current tariff while any new customers if less than 500,000 therms were classified as a LV-1 customer and those over 500,000 therms were classified as a T-4 customer"? (IRP page 31). Responder: Record Holder: David Swenson Ph 377-6118 Michael McGrath Intermountain Gas Company 555 S. Cole Rd. Boise, 10 83709 Ph 208-377-6168 Mike McGrathWitness: Response: a) The "Transportation Capacity" section of the IRP will not change because 1) the agreements governing the Company's capacity were already in place and are generally multi-year in nature and 2) as indicated in INT-G-08-01, Intermountain has agreed to release capacity to the formerT- 1 and T -2 customers in the same volume and receipt point proportion as that formerly held by Intermountain for use by these customers through the end of their now existing contracts. The next IRP wil consider any impact due the above changes if Intermountain rebalances its portfolio. b) The IRP did not include an assumption that T-1 and T-2 would be eliminated. Having said that, any future IRP, just as the 2008 IRP, will show that new transport customers wil provide their own interstate capacity. Only the very smallest new industrial customers wil be considered for LV-1 service which will limit the need for Intermountain to provide bundled service including interstate capacity. There will be no impact from a distribution system standpoint. Request No. 25: How has IGC or the companies it works with incorporated the electric industries effect of peaker plant gas consumption growth on the NYMEX prices used in forecasting? Record Holder: David Swenson Ph 377-6118 Michael McGrath Responder: Page 7 Witness: Intermountain Gas Company 555 S. Cole Rd. Boise, 10 83709 Ph 208-377-6168 Mike McGrath Response: The NYMEX futures market by its nature is very sophisticated and complex and at any given time wil reflect all known factors that can influence future prices including any projection of load growth in any particular market. Request No. 26: With regards to the multinational energy companies that were used in the evaluating future gas prices (IRP page 45): a) What two multinational energy companies were used in evaluating future gas prices? b) How were they selected amongst others? c) Please provide a comparison summary of these multnational energy companies' methodologies and output in arriving at similarly projected natural gas prices Responder:David Swenson Ph 377-6118 Michael McGrath Intermountain Gas Company 555 S. Cole Rd. Boise, 10 83709 Ph 208-377-6168 David Swenson Record Holder: Witness: Response: a) As stated on page 45 of the IRP, Intermountain approached two of its natural gas suppliers with a request for gas price forecasts. Due to issues relating to the competitive marketplace, both companies agreed to provide the requested data within the parameters outlined by Intermountain on the condition of confidentiality. There is no ulterior motive for Intermountain to conceal the source of the data but it does wish to honor its commitment to its business partners and therefore respectfully requests that this information remain confidential and out of the public domain. b) The Company selected these multinational energy companies based on 1) their considerable presence in the energy business and their known experience and expertise in the related financial/derivative market for energy 2) a historical business relationship of trust and, 3) those companies' willingness to provide the data within the criteria outlined by Intermountain without upfront cost and without requiring a costly subscription service. c) Please see the attached Request No. 26, Exhibit 26.1 and 26.2. Please note that the data on those exhibits was collected on two separate dates in order to validate the comparison. Request No. 27: What future plans beyond the "city gate" storage are in place to utilze redelivery capacity ("city gate supplies") without having to use IGC's interstate capacity resources? (IRP page 69). Responder:David Swenson Ph 377-6118 Michael McGrath Intermountain Gas Company 555 S. Cole Rd. Boise, 10 83709 Ph 208-377-6168 Mike McGrath Record Holder: Witness: Page 8 Response: Intermountain is aware of the types of various resources the IRP model selected and when such resources may be required. The Company is therefore vigilant in working with its Administrative Service Agent in identifying potential opportunities and evaluating whether or not they meet the Company's operating and cost criteria. Intermountain will engage in negotiation to obtain such resources when and where applicable. Request No. 28: Please provide a legend for the acronyms shown in Column 2 of Exhibit NO.8, Appendix D. (IRP page 70). Responder:David Swenson Ph 377-6118 Michael McGrath Intermountain Gas Company 555 S. Cole Rd. Boise, 10 83709 Ph 208-377-6168 David Swenson Record Holder: Witness: Response: A legend for the acronyms found in Column 2 of Exhibit NO.8, Appendix D is as follows: 1. IMG (row 4): A zone or pool in which all natural gas deliveries from Northwest Pipeline are received by Intermountain. These delivered supplies are then delivered to Intermountain's customers through its various citygates to the distribution system. 2. ENWP-ST (row 6): A summation of the existing transport agreement volumes with Northwest having their firm receipt point at the interconnect with GTN (and all related Canadian upstream capacity that delivers gas into GTN) at a point known as Stanfield in north central Oregon. 3. StanfieldlMG (row 17): A note to remind the model user which Arc the gas supplies are following. Request No. 29: With regards to the Sun Valley Lateral (IRP page 41): a) What analysis has been done to support the assumption that rebuilding the gate station and relying on short-term line pack will remediate the deficit through 2011? b) What wil happen following the 2011 horizon? Responder:Russ Nishikawa Ph 377-6038 Michael McGrath Intermountain Gas Company 555 S. Cole Rd. Boise, 10 83709 Ph 208-377-6168 Russ Nishikawa Record Holder: Witness: Response: a) In order to remediate the peak day deficit on the Sun Valley Lateral (SVL) prior to the installation of the compressor station for year 2011, the Company plans to operate the new gate station that feeds into the SVL at an increased outlet pressure for years 2009 and 2010. Northwest Pipeline has historically provided pressures that exceed contractual minimums and the newly constructed gate station gives IGC the ability to control the outlet pressure and maximize the higher operating pressure from the pipeline. The ability to receive the higher pressure and yet control the outlet Page 9 pressure will allow Intermountain to operate increased pressures safely and within code compliance. This pressure increase is planned to only occur on a temporary basis through 2010 and only during the winter months. This analysis is based on an annual study of the SVL using actual data and simulation models. The annual study begins with the installation of pressure recorder devices placed in key locations along the lateral each fall to capture real-life data throughout the winter months. The captured data is then reviewed each spring. This real-life analysis is derivatively applied to the SVL simulation model but cannot be directly applied because the model is simulating a higher degree day than any actual experienced degree day captured on pressure recorders. The simulation model is created using the Stoner softare program SynerGEE Gas v4.3.0. This software allows the user to input existing pipeline parameters and the corresponding gas usage components, and allows for an unsteady state model (USM) simulation with respect to time. USM allows the SVL model to take into consideration the line pack of the -65 miles of high pressure pipeline. b) The 2008 IRP includes the installation of a new and upgraded compressor station prior to the winter of year 2011 which wil increase the SVL capacity and negate any shown deficits through the year 2013. Request No. 30: Do you feel it is reasonable to attribute a 30% average annual forecasted growth change in customers between IRPs as being "mainly due to the downturn in housing construction"? If yes, explain why it is accurate to base projections on housing construction given its volatiliy. If no, explain what other factors signifcantly impacted the average annual forecasted growth change and how these impacts compare to housing construction (IRP page 74). Responder:Byron Defenbach Ph 377-6080 Michael McGrath Intermountain Gas Company 555 S. Cole Rd. Boise, 10 83709 Ph 208-377-6168 Byron Defenbach Record Holder: Witness: Response: Yes, because the preponderance of our customer growth is based on the residential new construction market. Basing projections on the housing construction outlook is the best gauge we have in assessing our potential growth. The market can be volatile but we update the IRP every two years in order to provide the most reasonably accurate outlook. It was our best estimate then and the market remains flat just as was forecast albeit our new customer additions are stil down from levels seen just a few years ago. Request No. 31: When comparing the declining industrial customer demand forecast reported in 2008 vs. 2006, what proportion is associated with a decline in economic conditions vs. progress made on alternative supply and DSM? (IRP page 74). Responder:Brent Wilde Ph 377-6053 Michael McGrath Intermountain Gas Company 555 S. Cole Rd. Boise, 10 83709 Ph 208-377-6168 Brent Wilde Record Holder: Witness: Page 10 Response: Intermountain has no hard data correlating economic conditions to any particular customer; however, the Company believes that the economic downturn has contributed to this decline. A second factor relating to less natural gas usage is energy conservation since the increasing cost of all energy sources is making energy conservation a "MUST DO" for all businesses. As an example, Intermountain participates in an annual energy symposium held by the J. R. Simplot Company to help their management teams learn more about ways to conserve resources and make their plants more energy efficient. Other organizations in the Pacific Northwest region hold similar conferences to discuss market trends including advances in technology and other issues fundamental to efficient business operations. Request No. 32: When IGC changed from the "Parade of Homes sponsorship to a practice wherein the Company now assists the local Building Contractor Associations" with promotion of their respective Parades (IRP page 76): a) Are these promotional efforts directed toward association that would already be installng effcient gas appliances? b) What Building Contractor Associations is IGC teaming up with to encourage efficiency? c) On what basis are these Associations selected? d) What other means of advertising are you considering for the deployment of IGC's advertising promotion and what was done to ensure these are the most effective avenues? (IRP page 66) Responder:Byron Defenbach Ph 377-6080 Michael McGrath Intermountain Gas Company 555 S. Cole Rd. Boise, 10 83709 Ph 208-377-6168 Byron Defenbach Record Holder: Witness: Response: a) As a matter of fairness, these promotional efforts are directed toward all the major building associations in our service territory. As trade allies, we wish to support all BCA's and encourage equipment efficiency. b) As stated above, all of those in our service territory. c) Again, as above, all the BCA's in our service territory. d) Our local offices purchase advertising in the Parade magazines, and we purchase radio advertising promoting the various Parades. High efficiency equipment is promoted in the radio ads. Our ad agency uses established measurement practices to ascertain the various market reach numbers for our advertising. Request No. 33: With regards to DSM programs between 2006 and 2008 outlined in the IRPs (IRP page 77): a) Please describe any changes or progression IGC has made in the selection, design, and assessment of DSM programs. b) If changes are planned, what is the timeline? Record Holder: Byron Defenbach Ph 377-6080 Michael McGrath Intermountain Gas Company 555 S. Cole Rd. Boise, 10 83709 Responder: Page 11 Witness: Ph 208-377-6168 Byron Defenbach Response: a) IGC's use of Navigant Consulting has been the one major change in DSM program design between the 2006 and 2008 IRPs. b) There have been numerous tangible activities that Intermountain has directed towards encouraging customer to use natural gas efficiently. As noted in the response to Request No. 20, ''The outcome of further discussions with IPUC Staff, and the direction provided by that interaction will be important for setting further milestones in the DSM process". Please contact Byron Defenbach for an elaboration the above mentioned adtivities. Request No. 34: Why is there a net decrease in "Existing Distribution Transport Capacity" shown on Table 9.3 when Tables 9.1 and 9.2 representing 2008 and 2006 "Load Duration" show no change? (IRP page 87). Responder:Brent Wilde Ph 377-6053 Michael McGrath Intermountain Gas Company 555 S. Cole Rd. Boise, 10 83709 Ph 208-377-6168 Brent Wilde Record Holder: Witness: Response: Table 9.3 contains errors. The 'Net' change in 'Existing Distribution Transport Capacity for 2009, 2010 and 2011 should be zero (0) for each column in all 3 years. Request No. 35: Why was there a significant decline in market penetration rates when comparing the 2008 IRP to the 2006 IRP, specifically in the Eastern division (2008 IRP page 18 and 2006 IRP page 21). Responder:Byron Defenbach Ph 377-6080 Michael McGrath Intermountain Gas Company 555 S. Cole Rd. Boise, 10 83709 Ph 208-377-6168 Byron Defenbach Record Holder: Witness: Response: Past IRP forecast market penetration rates for the Eastern Region were higher based on the Company's projection of an increase in the penetration rate; actual results proved these projections to be too optimistic. Therefore, this IRP uses lower rates that are more in line with recent actual results. Page 12 INTERMOUNTAIN GAS COMPANY RESIDENTIAUCOMMERCIAL SALES HISTORY 12-Aug-Q8 Sub-directoi: 2oo81RP File name: SALESHIST for 2008 IRP FOLLOWUP RESIDENTIAL NEW CONSTRUCTION ONLY WESTERN CENTRAL EASTERN REGION DIVISION REGIONYEA SALES SALES SALES TOTAL F80 F81 F82 F83 F84 F85 F86 F87 F88 F89 F90 F91 F92 F93 F94 F95 F96 F97 F98 F99 Foo FOl F02 F03 F04 F05 F06 F07 NA NA NA NA NA 1,077 1,337 1,271 1,187 1,624 2,218 2,236 3,351 4,671 5,482 3,801 4,826 4,771 5,843 6,063 6,102 6,126 6,078 6.995 8.138 10,230 9,602 5,225 F08 Plan 4,750 15 YR. ACTUALTOTAL 93,953 10 YR. ACTUALTOTAL 70,402 NA NA NA NA NA 120 98 99 117 234 365 287 346 426 601 610 617 650 691 667 668 668 846 956 906 1,166 1,335 1,001 11.808 8,904 NA NA NA NA NA 165 150 225 190 198 278 378 475 497 723 530 891 852 1,134 1.414 1,295 1,061 1.319 1,917 2,244 2,601 2.498 2.250 900 2,500 8,150 21,226 126,987 17.733 97,039 INTERMOUNTAIN GAS COMPANY RESIDENTIAUCOMMERCIAL SALES HISTORY 12-Aug-08 Sub-director 2008 IRP File name: SALESHIST for 2008 IRP FOLLOWUP RESIDENTIAL AND COMMERCIAL NEW CONSTRUCTION WESTERN CENTRAL EASTERN REGION DIVISION REGIONYEAR SALES SALES SAES TOTAL F80 F81 F82 F83 F84 F85 F86 F87 F88 F89 F90 F91 F92 F93 F94 F95 F96 F97 F98 F99 FOO FOl F02 F03 F04 F05 F06 F07 o o o o o 1,077 1,337 1,271 1,187 1.624 2,492 2,481 3,607 5,016 5.779 4.075 5,171 5,210 6.262 6.572 6,562 6,547 6,474 7,357 8,562 10,789 10,284 5,920 F08 Plan 5,445 15 YR. ACTUALTOTAL 100,580 10 YR. ACTUALTOTAL 75,329 13,421 9,959 o o o o o 120 98 99 117 234 494 403 459 537 700 736 730 759 800 808 822 801 933 1,020 967 1,276 1,415 1.117 1,030 o o o o o 165 150 225 190 196 443 556 658 705 811 638 1,065 1,008 1,334 1,638 1,462 1,252 1.523 2,109 2,472 2.846 2.790 2,536 24,189 138.190 2,755 9,230 19,962 105,250 924 1,507 919 1.574 1,516 1,362 1;585 1,595 1,494 2.056 2,861 2,901 4,172 5,594 6,806 4,941 6,334 6,273 7,66 8,144 8,065 7,855 8,243 9.86 11,288 13,997 13,435 8,476 o o o o o 1,362 1,585 1,595 1,494 2,056 3,429 3,440 4,724 6,258 7,290 5,449 6,966 6,977 8,396 9,018 8,846 8,600 8,930 10,486 12,001 14.911 14,489 9,573 COMMERCIAL Case No. INT-G-08-02 Staff's First Production Request Request No. 1 - Exhibit No. 1.1 Page 1 of 1 WESTERN CENTRAL EASTERN REGION DIVISION REGION YEAR SALES SALES SALES TOTAL F80 F81 F82 F83 F84 F85 F86 F87 F88 F89 F90 F91 F92 F93 F94 F95 F96 F97 F98 F99 FOO FOl F02 F03 F04 F05 F06 F07 NA NA NANA NA NA NOT TRACKED NOT TRACKED NOT TRACKED NOT TRACKED NOT TRACKED NOT TRACKED NOT TRACKED NOT TRACKED274 129 165245 116 178256 113 183345 111 208297 99 88274 126 108345 113 174439 109 156419 109 200509 141 224460 154 167421 133 191396 87 204362 64 192424 61 228559 110 245682 60 292695 116 286 F08 Plan 695 15 YR. ACTUALTOTAL 6,627 10 YR. ACTUALTOTAL 4,927 130 1,613 2.96 1,055 2.229 337 265 o o o o o o o o 568 539 552 664 484 508 632 704 728 874 781 745 687 618 713 914 1.054 1,097 255 1,060 11.203 8,211 COMM NEW CONST SALES AS A % OF RES NEW CONS' WEST CENTRAL EAST COMPANY 12.35% 10.96% 7.64% 7.39% 5.42% 7.21% 7.15% 9.20% 7.17% 8.40% 7.54% 6.87% 6.52% 5.18% 5.21% 5.46% 7.10% 13.30% THREEYR AVe. 8.62% NOT TRACKED NOT TRACKED NOT TRACKED NOT TRACKED NOT TRACKED NOT TRACKED NOT TRACKED NOT TRCKED 35.34% 59.35% 19.85% 40.42% 47.09% 18.58% 32.66% 38.53% 13.23% 26.06% 41.85% 11.87% 16.47% 12.17% 7.11% 20.66% 20.38% 10.28% 18.31% 19.53% 9.98% 16.77% 18.31% 1122% 15.77% 17.64% 9.49% 21.14% 15.84% 10.73% 23.05% 12.90% 9.68% 19.91% 18.00% 9.48% 10.28% 15.47% 8.33% 6.69% 10.02% 6.26% 6.73% 10.16% 6.32% 9.43% 9.42% 6.53% 5.99% 11.69% 7.85% 11.59% 12.71% 12.94% 9.00%11.27%9.11% 14.63% 14.44% 10.20% 13.25% 7.05% 13.66% 13.96% 8.82% 7.00% 11.85% 12.57% 8.46% IN T E R M O U N T A I N G A S C O M P A N Y FI S C A L 2 0 0 7 S I N G L E / M U L T I F A M I L Y O N - L I N E M A R K E T P E N E T R A T I O N SE P T E M B E R 3 0 , 2 0 0 7 Su b d i r e c t o r y : M K T R P T S Fil e n a m e : F 2 0 0 7 O n l i n e P e n e t r t i o n R a t e Sh e e t n a m e : S I N G L E - M U L T I C O M B I N E D / - - - S I N G L E / M U L T I F A M I L Y M O N T H L Y B U I L D I N G P E R M I T S P E R R E G I O N A L R E P O R T S - - \ 1 - - - - - . - - 1 - - - - - - - . 1 . . . - . . - - 1 - - - - - - - - 1 - - - - . - - . .~ - . - - - - -- - - . - - - 1 - - . - . - - - -- - - - - - - - - 1 - - - -- I CI T Y OR AR E A 1 OC T 1 NO V 1 DE C 1 JA N 1 FE B MA R AP R 1 MA Y JU N 1 JU L AU G 1 SE P -- - - - - - - - . - - - - - - - - - - - - - - - _ . . _ - - - - - - - - - - - - - - - - - - - - - - - - - 1 . - . - - - - 1 - - - - - - - . 1 - - . - - - - - 1 - - - - - - - - 1 - - - - - - - - --- - - - - - -- - - - - - - 1 - . . - - - - - -- - - - - - - - - 1 - - -1 - - - - - - - _ . 1 1 I I I 1 1 1 YT D BO I S E / M E R I D I A N / A D A I 1 I I 1 1 1 1 33 6 3 1 1 1 1 I 1 1 YT D CA L D W E L L / N A M P A / C A N Y O N C O . 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C .¡ C D m~ Case No. INT-G-08-02 Staff's First Production Request Request NO.9 - Exhibit No. 9.1 Page 1 of 2 INTERMOUNTAIN GAS COMPANY FY09 INDUSTRIAL PLA vs FY08 CURRENT ESTIMATE FY09 FY08 FY08 FY09 Over/IUnder)Pecent Change No.SEGMENT/CUSTOMER Plan AprCE Plan 08 AprCE 08 Plan 08 Apr CE 08 Plan Explanation 1 Customer No. 1 10,600,000 11,273,539 10,000,000 (673,539)600,000 -6.0%6.0%Oil boiler dow for repair most of FY08 2 Customer NO.2 2,664,000 2,083,237 2,380,000 580,763 284,000 27.9%11.9%Historil 3 Customer NO.3 8,000,000 8,528,255 7,200,000 (528,255)800,000 -6.2%11.1%Historical 4 Customer NO.4 6,500,000 5,753,079 5,100,000 746,921 1,400,000 13.0%27.5%Historical 5 Customer NO.5 3,000,000 3,827,060 2,297,978 (827,060)702,022 -21.6%30.5%Historil 6 Customer NO.6 4,050,000 3,933,628 3,708,555 116,372 341,445 3.0%9.2% 7 Customer No. 7 7,700,000 8,514,704 7,000,000 (814,704)700,000 -9.6%10.0%Historical 8 Customer No.8 3,747,000 5,719,350 4,000,000 (1,972,350)(253,000)-34.5%-6.3%Historil 9 Customer NO.9 10,551,000 10,440,790 11,000,000 110,210 (449,000)1.1%-4.1% 10 Customer No. 10 12,316,000 11,895,706 12,600,000 420,294 (264,000)3.5%-2.3% 11 Customer No. 11 9,564,000 10,270,228 11,860,000 (706,228)(2,296,000)-6.9%-19.4%Historical 12 Customer No. 12 5,336,000 5,204,030 4,245,803 131,970 1,090,197 2.5%25.7% 13 Customer No. 13 680,000 676,131 600,000 3,869 80,000 0.6%13.3% 14 Customer No. 14 200,000 13,389 1,575,000 186,611 (1,375,000)1393.8%-87.3%Plant been down-plant says it will retum this yer 15 Customer No. 15 6,532,000 5,999,046 5,514,000 532,954 1,018,000 8.9%18.5% 16 Customer No. 16 200,000 147,663 250,000 52,337 (50,000)35.4%-20.0%Plant should get back to norml 17 Customer No. 17 240,000 297,830 200,000 (57,830)40,000 -19.4%20.0%Historical 18 Customer No. 18 1.937,000 1,797,957 1,250,000 139,043 687,000 7.7%55.0%Trend 19 Customer No. 19 2,934,000 3,024,562 3,000,000 (90,562)(66,000)-3.0%-2.2% 20 Customer No. 20 1,120,000 1,108,706 850,000 11,294 270,000 1.0%31.8% 21 Customer No. 21 7,870,000 8,755,557 8,500,000 (885,557)(630,000)-10.1%-7.4%Historical trend 22 Customer No. 22 2,263,000 2,119,811 2,000,000 143,189 263,000 6.8%13.2% 23 Customer No. 23 425,000 450,952 425,000 (25,952)0 -5.8%0.0% 24 Customer No. 24 250,000 271.019 280,000 (21,019)(30,000)-7.8%-10.7% 25 Customer No. 25 2,700,000 2,704,401 2,600,000 (4,401)100,000 -0.2%3.8% 26 Customer No. 26 2,932,000 2,623,331 3,000,000 308,669 (68,000)11.8%-2.3%Historical 27 Customer No. 27 1,300,000 1,217,926 1,178,303 82,074 121,697 6.7%10.3% 28 Customer No. 28 875,000 890.275 850,000 (15,275)25,000 -1.7%2.9% 29 Customer No. 29 1,200,000 1.232,193 1,000,000 (32,193)200,000 -2.6%20.0% 30 Customer No. 30 16,300,000 16,647,760 16,000,000 (347,760)300,000 -2.1%1.9%Historical 31 Customer No. 31 7,300,000 7,569,018 7,500,000 (269,018)(200,000)-3.6%-2.7%Historical 32 Customer No. 32 3,600,000 3,766,469 2,927,840 (166,469)672,160 -4.4%23.0%Hisrical 33 Customer No. 33 1,300,000 1,353,117 1,300,000 (53,117)0 -3.9%0.0% 34 Customer No. 34 709,000 747,072 750,000 (38,072)(41,000)-5.1%-5.5% 35 Customer No. 35 560,000 595,227 551,043 (35,227)8,957 -5.9%1.6% 36 Customer No. 36 228,000 237,535 220,000 (9,535)8,00 -4.0%3.6% 37 Customer No. 37 360,000 202,733 180,000 157,267 180,000 776%100.0%Historl 38 Customer No. 38 837,000 892,767 950,000 (55,767)(113,000)-6.2%-11.9% 39 Customer No. 39 641,000 554,466 550,000 86,534 91,000 15.6%16.5%Historical 40 Customer No. 40 900,000 890,601 750,000 9,399 150,000 1.1%20.0% 41 Customer No. 41 875,000 913,939 790,000 (38,939)85,000 -4.3%10.8% 42 Customer No. 42 280,000 178,575 234,700 101,425 45,300 56.8%19.3%Trend 43 Customer No. 43 268,000 304,585 310,000 (36,585)(42,000)-12.0%-13.5%Historical 44 Customer No. 44 850,000 921,654 875,000 (71,654)(25,000)-7.8%-2.9% 45 Customer No. 45 9,350,000 9,646,220 9,190,000 (296,220)160,000 -3.1%1.7% 46 Customer No. 46 475,000 506,591 450,000 (31,591)25,000 -6.2%5.6% 47 Custoner No. 47 294,000 294,469 405,000 (469)(111,000)-0.2%-27.4% 48 Custoner No. 48 484,000 427.592 467,249 56,408 16,751 13.2%3.6%Tred 49 Customer No. 49 581,000 461,751 600,000 119,249 (19,000)25.8%-3.2%Trend 50 Customer No. 50 286,000 767,153 700,000 (481,153)(414,000)-62.7%-59.1% 51 Customer No. 51 950,000 933,273 850,000 16,727 100,000 1.8%11.8% 52 Customer No. 52 2,750,000 2,536,699 2,000,000 213,301 750,000 8.4%37.5% 53 Customer No. 53 3,618,000 3,708,852 3,550,000 (90,852)68,000 -2.4%1.9% 54 Customer No. 54 850,000 735,199 400.000 114,801 450,000 15.6%112.5%Duel fuel boiler down for maintenance FY08 55 Customer No. 55 350,000 363,055 340,000 (13,055)10,000 -3.6%2.9% 56 Customer No. 56 5,545,000 5,464,178 5,350,000 80,822 195,000 1.5%3.6% 57 Customer No. 57 1,010,000 983,081 950,000 26,919 60,000 2.7%6.3% 58 Customer No. 58 505,000 481,972 500,000 23,028 5,000 4.8%1.0% 59 Custoner No. 59 3,200,000 0 °3,200,000 3,200,000 #DIV/O!#DIVlO! 60 Customer No. 60 616,000 570,584 568,540 45,416 47,460 8.0%8.3% 61 Customer No. 61 4,729,000 4,678,943 4,600,000 50,057 129,000 1.1%2.8% 62 Customer No. 62 249.000 248,668 250,000 332 (1,000)0.1%-0.4% 63 Customer No. 63 218,000 224,392 225,878 (6.392)(7,878)-2.8%-3.5% 64 Customer No. 64 432.000 422,798 430,000 9,202 2,000 2.2%0.5% 65 Customer No. 65 2.264,000 2,196,093 2,200,000 67,907 64,000 3.1%2.9% 66 Customer No. 66 428,000 448,291 450,000 (20,291)(22,000)-4.5%-4.9% 67 Customer No. 67 2,772,000 2,560,129 1,750,000 211,871 1,022,000 8.3%58.4%In full producton now 68 Customer No. 68 274,000 312,013 385,000 (38,013)(111,000)-12.2%-28.8%Trend 69 Customer No. 69 1,300,000 1,358,132 1,200,000 (58,132)100,000 -4.3%8.3% 70 Customer No. 70 275,000 330,015 320,000 (55,015)(45,000)-16.7%-14.1%Coal boiler up and down-hisotr 71 Customer No. 71 219,000 218,980 220,000 20 (1,000)0.0%-0.5% 72 Customer No. 72 225,000 223,298 215,000 1,702 10,000 0.8%4.7% Case No. INT-G-08-02 Staff's First Production Request Request No. 18 - Exhibit No. 18.1 Page 1 of 1 List of Residential Measures Considered for IGC's DSM Program Portfolio Advanced Efficiency - Condensing Furnace AFUE=96 Air-to-Air Heat Exchangers Below Grade Insulation (R-10) Duct Insulation (R-8) Drain Water Heat Recovery (GFX) Energy Star Clothes Washer (MEF=1.8) Energy Star Dishwasher (EF=O.58) Faucet Aerators (2.5 GPM) High Efficiency Storage Water Heater (EF=0.64) Hot Water (SHW) Pipe Inulation (R-4) Integrated Space and Water Heating - Premium Storage WH Duct Repair and Sealing Green Roof High Effciency Condensing Furnace (AFUE =90) High Efficiency Windows (U=O.35) Insulated Exterior Entry Door Insulation-Ceiling (R-38) Inulation-Floor (R-25) Insulation-Rim Joist (R- 10) Insulation-Wall 2x4 (R-13) Low-Flow Showerheads 2.5 GPM Integrated Space and Water Heating - Condensing Furnace (AFUE=90) Leak Proof Duct Fittings NW ES Homes - Site Built PTCS Aerosol-Based Duct Sealing Whole House Air Sealing ni'tc (1(,.¡: a.-ni(,;: ~ (1 æ 0 ~0. 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