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Operator
Good afternoon, ladies and gentlemen. Thank you for waiting and welcome to the WEC Energy Group's conference call to review the 2015 third-quarter results. This call is being recorded for rebroadcast and all participants are in listen-only mode at this time.
Before the conference call begins, I will read the forward-looking language. All statements in this presentation, other than historical facts, are forward-looking statements that involve risks and uncertainties, which are subject to change at any time. Such statements are based on management's expectations at the time they are made.
In addition to the assumptions and other factors referred to in connection with the statements, factors described in the WEC Energy Group's and Integrys Holdings' latest form 10-Ks and subsequent reports filed with the Securities and Exchange Commission could cause actual results to differ materially from those contemplated. During the discussions, referenced earnings per share will be based on diluted earnings per share unless otherwise noted. After the presentation, the conference will be open to analysts for questions and answers.
In conjunction with this call, WEC has posted on its website a package of detailed financial information at wecenergygroup.com. A replay of our remarks will be available approximately two hours after the conclusion of this call. And now it's my pleasure to introduce Mr. Gale Klappa, Chairman of the Board and Chief Executive Officer of WEC Energy Group.
Gale Klappa - Chairman & CEO
Colleen, thank you very much. Good afternoon, everyone and thank you for joining us today as we review our results for the third quarter. This, of course, is our first full quarter as a newly combined company. We formed WEC Energy Group on June 29 when we closed our acquisition of Integrys.
I will update you on our progress as a new company in just a moment, but, first, as always, I'd to introduce the members of our management team who are here with me today. We have Allen Leverett, President of WEC Energy Group; Pat Keyes, our Chief Financial Officer; Susan Martin, General Counsel; Scott Lauber, Treasurer; and Beth Straka, Senior Vice President for Corporate Communications and Investor Relations.
We also have one new member of our senior team with us today, Bill Guc. Bill is our new Vice President and Controller. He has more than 20 years of solid experience in our industry. Prior to the acquisition, he served as Treasurer of Integrys. Bill, welcome aboard.
Turning now to the third quarter, I'd like to remind you that we are reporting our legacy Wisconsin Energy results only through the remainder of 2015. So the financial results and the guidance that we'll be discussing have been adjusted to remove the impact of the acquisition. Pat will review our results in detail in just a few minutes, but as you saw from our news release this morning, we reported Wisconsin Energy adjusted standalone earnings of $0.61 a share for the third quarter of this year. That compares with adjusted earnings of $0.57 a share for the third quarter of 2014.
We delivered strong results through an unusual pattern of summer weather, a cool July, a cool August, followed by an unseasonably warm September. Taking a quick look at the state of the economy, Wisconsin's unemployment rate fell to 4.3% in September, well below the national average and the lowest rate of unemployment we've seen here since back in April of 2001. And in the latest survey of the climate for business, Wisconsin was ranked the 12th best state for business by Chief Executive magazine. This ranking represents a huge leap forward since 2010 when the state came in at 41st.
In this year's third quarter, residential use of electricity surged by 11.5% compared to last year's abnormally cool summer. Also, our small commercial and industrial segment grew slightly with electricity use rising by 1.6% over the third quarter of a year ago. And deliveries of electricity to our large commercial and industrial customers, excluding the iron ore mines, rose by 6/10 of 1% in the quarter. Several sectors continue to show strength, including food processing, printing and, to Mrs. Robinson, plastics.
In addition, we continue to see an uptick in customer growth across our system. We Energies is serving 6000 more electric customers and 10,000 more natural gas customers today than we were a year ago.
Now I'd like to spend just a few minutes discussing our plans for the future of a new WEC Energy Group. When we first considered the opportunity to acquire Integrys, we weighed it against our three important criteria for evaluating any potential acquisition. And after considerable due diligence, we found that it met or exceeded all three criteria.
First, it would be accretive to earnings per share in the first full calendar year after closing. Second, it would be largely credit-neutral and third, the long-term growth rate would be equal to or greater than Wisconsin Energy's standalone growth rate. Of course, over the past year, a number of similar deals have been announced. Several, as you know, in just the past few months. We are pleased that the metrics for our transaction compare very favorably to these recent announcements.
We also see tremendous opportunity in the framework of the new Company. WEC Energy Group has the scale, scope, technical depth, geographic reach and financial resources to thrive in our consolidating industry. We plan to leverage these strengths to deliver operational and financial benefits to all of our stakeholders, from the customers and communities we serve, to the people we employ, to the shareholders who count on us to create value. And with our proven leadership team, we will incorporate best practices across the organization to streamline the operations and reduce costs.
WEC Energy Group is now the eight largest natural gas distribution company in America and one of the 15 largest investor-owned utility systems in the United States with significant opportunities for growth. Bottom line, we have the same top management team, but now with a new platform for growth, a platform focused on the energy infrastructure needs of 4.4 million customers across the Midwest.
Now let's touch on some of the key financial measures for the new Company. For starters, we issued $1.5 billion of parent company debt to help finance the transaction. The all-in interest cost for the debt was 2.21% annually, an outstanding result and clearly lower than we had expected.
So for 2016, we now project growth in earnings per share for the combined company to be in a range of 6% to 8%. 6% to 8% earnings growth for next year assumes that Wisconsin Energy standalone delivers earnings of $2.72 a share this year. For the longer term, we see earnings-per-share growth of 5% to 7% annually driven by operating efficiency, financial discipline and infrastructure investments that the region needs for reliability and for improved environmental performance.
And on the subject of infrastructure upgrades, you may recall that we originally projected capital spending for the combined company in the range of $1.3 billion to $1.4 billion a year for the remainder of the decade and actually beyond. Now about 120 days into the Company, as we look at the spectrum of projects that need to be addressed to deliver industry-leading reliability, we are seeing even stronger investment opportunities. And in the latter part of the decade, our capital investments could range above $1.5 billion a year. With a few other minor changes to our estimates, we continue to project longer-term earnings-per-share growth in the 5% to 7% a year range and we are comfortable at the midpoint of that range.
Lastly, a reminder about our dividend policy. In June, our Board of Directors raised the quarterly dividend to $0.4575 a share, an increase of 8.3% over the previous quarterly rate. This is equivalent to an annual rate of $1.83 a share. You may recall that this was our second dividend increase during 2015. In total, we have raised the dividend by 17.3% this year. Going forward, we are targeting, as you may have heard us say, a payout ratio of 65% to 70% of earnings and we expect dividend growth to be in line with growth in earnings per share.
Looking forward, we expect to return to our normal pattern of dividend action. Management typically brings a dividend proposal to the Board in January of each year and we would expect to do so in January of 2016.
Now I'd like to spend just a few minutes discussing some of our operational highlights in the past quarter. First, I am pleased to report that just two weeks ago, We Energies was named the most reliable energy in the Midwest for the fifth year in a row and in recent national studies of large utility systems, We Energies ranked in the top quartile in the Midwest for customer service and power quality and in the top quartile nationally for customer service. In addition, Wisconsin Public Service was ranked number two in the Midwest for overall customer satisfaction among midsized utilities.
We are also making progress on the accelerated main replacement project at Peoples Gas in Chicago. As you recall, this is one of the largest infrastructure modernization programs in the country. The program calls for the replacement of approximately 2000 miles of Chicago's aging gas pipelines over the next 20 years. Some of those pipes, ladies and gentlemen, literally date back to the days of Abraham Lincoln.
One of our most immediate and important goals is to improve the management and the performance of this project. Since we closed the acquisition, we put in place an entirely new senior leadership team at Peoples and we've built an in-house construction management group with extensive project experience. They determined that the best approach for the main replacement program in Chicago is a fresh start.
So over the past 100 days, we've transitioned the management of the project from an outside contractor to our experienced in-house team. We've also engaged a nationally known firm to help us conduct an independent review of the cost, scope and schedule for the program. We expect to submit this review and our recommendations to the Illinois Commerce Commission by the end of November. I am confident that the steps we are taking will ensure that Chicagoans have the safe, modern, natural gas delivery system that they deserve.
Then on the natural gas distribution side of our business in Wisconsin, I'm pleased to announce that our West Central gas pipeline project is now complete and as of November 1 in service. This was the largest expansion of our natural gas distribution network in Company history. The 85-mile line addresses reliability concerns and allows us to add a significant number of customers in the areas where propane use is the heaviest. The project came in on time and actually better than budget at just under $130 million, excluding allowance for funds used during construction.
On the power generation side of our business, you may recall that we are working to add fuel flexibility at our Oak Creek expansion units. These units were initially permitted to burn bituminous coal, but given the current cost differential between bituminous coal and Powder River Basin coal, blending the two types of fuel could save our customers between $25 million and $50 million a year in fuel costs depending on the blend.
We are working now to expand our coal storage capability at the Oak Creek site and the first capital improvements inside the plant began in September during a planned outage for one of the two units. We plan to upgrade the second unit during the first quarter of next year. Our share of these investments for the new Oak Creek units is targeted at approximately $80 million, again, excluding allowance for funds used during construction.
Next, the conversion of our Valley Power Plant from coal to natural gas is now more than 97% complete with only tuning and just punch list items remaining for the project. Solar conversion costs will be $60 million to $62 million, excluding allowance for funds used during construction. We expect to complete the work at the Valley Plant on time and on budget within the next 30 days.
We also continue to make good progress on the major construction work at our Twin Falls hydroelectric plant on the border of Wisconsin and Michigan's Upper Peninsula. After more than 100 years of operation, we are building a new powerhouse and adding spillway capacity that will meet current federal standards. Overall, the project is on time and on budget with approximately 60% of the construction now complete. We are targeting commercial operation for the summer of 2016 and we are forecasting a total investment of $60 million to $65 million, again, excluding allowance for funds used during construction.
Looking ahead, we continue to see significant investment opportunities as we upgrade our aging distribution networks and focus on delivering the future. We plan to provide you as we promised with more details on our capital investment plans for the next 10 years at the EEI Conference in just a few days.
Turning to our transmission business, WEC Energy Group, I would remind you, is now a 60% owner of American Transmission Company. As you may have seen, ATC recently updated its 10-year capital plan. The plan has slightly lower growth in the near term, but it calls for ATC to invest $3.7 billion to $4.5 billion between now and 2024 to bolster the reliability of the grid. This latest projection is up from the previous 10-year plan. That previous plan, as you recall, had an investment ranging from $3.3 billion to $3.9 billion. As I've said in the past, we welcome the opportunity to increase our commitment to the transmission business.
On a final note, we've completed our evaluation of the compressed natural gas business that we inherited with the acquisition of Integrys. That business is known as Trillium CNG. We've determined that the enterprise has value, but does not fit our focus on our core regulated business. As a result, we are now seeking a new owner for Trillium.
So in summary, ladies and gentlemen, these are exciting times filled with opportunity for our Company and we believe we have a very bright future ahead. Now for more details on our third-quarter performance and our outlook for the remainder of the year, here is our Chief Financial Officer, Pat Keyes. Pat.
Pat Keyes - EVP & CFO
Thank you, Gale. As Gale mentioned, our 2015 third-quarter Wisconsin Energy standalone adjusted earnings were $0.61 a share. That compares to adjusted earnings of $0.57 a share for the corresponding quarter in 2014. Our adjusted earnings exclude the Integrys Company's earnings and the impacts of the acquisition. They are also adjusted for the shares issued in connection with the merger.
To facilitate comparisons with last year's third quarter, my discussion of results will focus primarily on legacy Wisconsin Energy. The earnings packet placed on our website this morning includes the results of the Integrys companies and has a full GAAP to adjusted reconciliation. We will continue this practice for the remainder of 2015.
First, I will focus on operating income for Wisconsin Energy and then discuss other income, interest expense and income taxes. Third-quarter adjusted consolidated operating income was $262.2 million as compared with adjusted income of $249.1 million in 2014. That's an improvement of $13.1 million.
Starting with utility energy, adjusted operating income in the third quarter totaled $168.5 million for 2015, an improvement of $10.1 million from the third quarter of 2014. On a quarter-over-quarter basis, weather helped our earnings by $27.6 million. We had a warmer than normal September in 2015 and a very cool third quarter in 2014. We were also helped by $12 million of improved fuel recoveries and $10.1 million from the impact of the 2015 rate case.
On the downside, we saw an increase in utility operations and maintenance costs of $36 million primarily driven by increased regulatory amortizations, the timing of projects and certain benefit costs. And we also saw increased depreciation expense of $3.6 million associated with higher capital expenditures. Combining these and other factors results in a $10.1 million increase in adjusted utility operating income in the third quarter of 2015 compared with the same quarter last year.
Our non-utility operating income was $93.2 million, which is $1.2 million higher than the prior year due to additional investment in our Oak Creek expansion units. Our adjusted corporate and other improved slightly by $1.8 million over the previous year. Taking these changes together, you arrive at Wisconsin Energy's third-quarter adjusted operating income of $262.2 million. This is a $13.1 million improvement over the third quarter of 2014.
During the third quarter this year, earnings from our investment in American Transmission Company totaled $17.6 million, a decline of $400,000 as compared to the same period in the prior year. As we previously mentioned, ATC has established reserves in light of recent appeals to the FERC regarding authorized returns for regional transmission organizations. These earnings only reflect Wisconsin Energy's standalone share of ATC's results.
Other income net increased by $900,000 driven by higher AFUDC and our adjusted net interest expense increased by $700,000 primarily because of higher utility debt levels. Wisconsin Energy's standalone income tax expense rose by $4 million for the quarter. We expect that Wisconsin Energy's standalone effective tax rate for the calendar year will be between 37% and 38%. WEC Energy Group's effective income tax rate, driven by a one-time adjustment related to the acquisition of Integrys, is expected to be between 38% and 39% for 2015. Combining all of these items brings you to adjusted net income of $138.2 million or $0.61 a share for the third quarter of 2015.
Turning now to operating cash flows, we have provided information in your earnings packet for the consolidated WEC Energy Group exclusively on a GAAP basis and thus this includes three months of results from Integrys. We believe this will be a more accurate indicator of the cash position of the Company.
During the first nine months of 2015, WEC Energy Group's operating cash flows totaled $1.073 billion, which is a $39 million improvement over the first nine months of 2014. Operating cash flows were helped by improved working capital, lower natural gas prices, dropped accounts receivable balances and reduced the cost of gas in storage. Legacy Wisconsin Energy's year-to-date operating cash flows in 2015 were about $100 million lower as compared to 2014. As previously discussed, we contributed $100 million to our pension plans in 2015. No such contributions were made during 2014.
Our adjusted debt to capital ratio as of September 30, 2015 was 50.3%. This ratio reflects the Integrys acquisition and treats half of the WEC Energy Group's hybrid securities as common equity, which is consistent with past presentations. We continue to use cash to satisfy any shares required for our 401(k) plan, options and other programs. Going forward, we do not expect to issue any additional shares.
For comparison purposes, the sales information I will discuss next will reflect results for We Energies only. The actual third-quarter retail deliveries rose by 0.9%. Excluding the iron ore mines, retail deliveries increased by 4.4%. Weather-normalized retail deliveries, again, excluding the iron ore mines, were flat compared to the third quarter of 2014.
Looking at the individual customer segments, we saw weather-normalized residential deliveries rise by 1.4% and as Gale mentioned, actual residential deliveries rose by 11.5%. Across our small commercial industrial group, weather-normal quarterly deliveries fell by 0.7%. Actual deliveries rose by 1.6%. And in the large commercial industrial segment, deliveries for the third quarter of 2015 fell by 8.2%. Excluding the iron ore mines, large commercial and industrial deliveries rose by 0.6%.
Our year-to-date weather-normalized retail gas deliveries, excluding gas used for power generation, dropped 0.4% compared to the same period in 2014. Our actual gas deliveries, again, excluding gas used for power generation, were down 6.7% compared to the Polar Vortex-driven gas sales last year.
Moving to other items of interest, in September of 2015, Wisconsin Gas issued a $200 million 10-year bond at a coupon of 3.53%. In part, this new bond is replacing a $125 million bond with a coupon of 5.2% that comes due in December.
Turning now to our 2015 earnings forecast, for the remainder of the year, we will continue to guide based on adjusted standalone earnings for Wisconsin Energy and again, for your reference, adjusted earnings exclude the results of Integrys, exclude the impacts of the acquisition and adjusts for the additional shares that were issued as part of the acquisition.
Wisconsin Energy's adjusted earnings through the third quarter are $2.10 per share. Taking into account the impact of a relatively warm October as we enter the heating season and assuming normal weather for the rest of the quarter, we project our fourth-quarter adjusted earnings to be $0.62 per share. Thus the 2015 adjusted earnings forecast for Wisconsin Energy is $2.72 a share. At $2.72, Wisconsin Energy's regulated utilities will earn at or near their allowed rates of return. So again, we project our fourth-quarter adjusted earnings to be $0.62 per share.
Finally, I would like to announce our earnings guidance for 2016. As Gale mentioned, we forecast earnings-per-share growth for WEC Energy Group to be in the range of 6% to 8% off a projected base of $2.72 a share. Therefore, our guidance for 2016 is in a range from $2.88 to $2.94 a share. This projection assumes normal weather and excludes any potential remaining acquisition-related costs. Again, our guidance for 2016 is $2.88 to $2.94 per share. And with that, I will turn things back to Gale.
Gale Klappa - Chairman & CEO
Terrific. Pat, thank you. Overall, we are solidly on track and focused on delivering value for our customers and our stockholders.
Operator
And now we would like to take your questions. (Operator Instructions). Julien Dumoulin-Smith, UBS.
Julien Dumoulin-Smith - Analyst
Perhaps just to kick off the conversation, the comment on the latter part of the decade about the $1.5 billion, could you, one, elaborate around what would be driving that, what would the investment be, where would it be oriented? And then also confirm for us, would that require equity or is the balance sheet in a sufficient place to deal with the incremental capital?
Gale Klappa - Chairman & CEO
First of all, let me just reiterate no expectation of additional equity, period. And then in terms of the types of projects that we are seeing, we will give you some really granular detail at the EEI Conference on the 10-year capital spending and on the uptick that we are seeing in the latter part of the decade, but let me just say, in general, we are seeing additional requirements, additional capital spending for upgrades and expansion, particularly with natural gas in Wisconsin and for that matter in Minnesota.
So they are really infrastructure projects. They are the kinds of things we have been talking about, but as we looked across, as I mentioned, across the spectrum of projects now with the new combined company, we are really seeing infrastructure needs that are going to drive the capital spending higher.
Now if you'll recall, as we made the acquisition, we indicated that we would -- our number one priority, if there were legitimate needed projects, would be to deploy some of our positive free cash flow to that type of investment. So basically, what we are saying is that, over the course of the last 120 days as we've really refined our estimates and looked at the spectrum of projects, we are seeing higher capital spend out in those years, largely delivery networks, a lot of it gas.
Julien Dumoulin-Smith - Analyst
Got it. Excellent. And then let me cut back, and I know this is a little preempting next week a bit, but you talk about the fresh start, to use your words. Does that impact the timing of the CapEx on the Peoples side of the business and perhaps what drove you to come to that conclusion? Can you elaborate a little bit on what exactly that means?
Gale Klappa - Chairman & CEO
Well, the answer is certainly for this year and for the near term, I wouldn't expect any change in the capital projections for Peoples Gas. From the standpoint -- and let me explain. There are only so many streets you can dig up in Chicago at one time. So in essence, we are physically limited as to how much progress you can make in any given year in terms of the gas main replacement program of those 2000 miles of pipes under the streets of Chicago. So there's a governing factor that is driven mostly by just the physical capability of how many streets can you dig up and repair. That's number one.
Number two, related to the fresh start, as you may recall, there was a Commission-mandated audit of the management of the program. It was a rather critical audit. The prior management had outsourced the management of this project and we really felt like bringing in an experienced construction management team was very important to the future of the project and to managing that project well and that team has looked at the project controls and all of the other issues that they found and that's why we've decided to go back with a fresh start, with a whole new bottoms-up analysis and you will see, when we file publicly on November 30, what our long-term cost projections are and what our immediate priorities will be.
Julien Dumoulin-Smith - Analyst
Excellent. Thank you all. See you soon.
Operator
Jim von Riesemann, Mizuho Securities.
Jim von Riesemann - Analyst
First thing, Trillium book value and the tax basis and what your expected use of proceeds are?
Gale Klappa - Chairman & CEO
We will talk to Allen about that, but I believe the book value is around $130 million.
Jim von Riesemann - Analyst
Okay. Tax base is similar?
Allen Leverett - President
No, it's probably three-quarters of that.
Jim von Riesemann - Analyst
Okay. Switching over to cash flow, I'm not trying to become a debt analyst, and you guys, over the years, have been very helpful with earnings guidance and dividend expectations, but less so on the cash flow side of things. So when you look at your FFO predictions, can you just bookend how much of that FFO comes from say Power the Future and then if you add in Illinois relative to the total FFO amounts?
Gale Klappa - Chairman & CEO
Jim, we don't have that kind of detail in the room with us today. We can off-line kind of give you some broad estimates, but we just don't have -- we want to give you the right kind of answers. We just don't have that specificity in the room with us today. The entire brain trust is here, but we don't have that kind of specificity today.
Jim von Riesemann - Analyst
Okay. Are you seeing any -- we will talk about that off-line -- but as a follow-up to that, are you seeing any calls on your cash in the near to intermediate term, intermediate being defined as say two to three years? This year, you did your pension contribution for the first time. Is there any changes with respect to deferred taxes and the like?
Gale Klappa - Chairman & CEO
Well, obviously, the short answer is no. However, there's going to be a lot of developments, particularly toward the end of the year and specifically related to whether or not Congress renews or extends bonus depreciation. For many companies, including ours, that's a very big number. Now, from a cash standpoint, we have not factored in the potential uptick of bonus depreciation again from a cash standpoint in 2016 or beyond. We are just very conservative from that standpoint. We are not going to make any assumptions until we see the legislation actually signed and in place. But those are very -- that could be a very big swing.
Jim von Riesemann - Analyst
No, I get it. And then the last question, still on this debt analyst hat, fixed versus variable debt. If I did my math correctly on the combined entity, the debt is basically entirely fixed that you have. I think there's a few resets that switch over to variable in the next three to five years, but nothing really to get worked up about in the event the Fed finally decides to start moving rates, is that correct?
Gale Klappa - Chairman & CEO
Oh, gosh, yes. The lion's share of our debt is absolutely fixed. You are correct; there are a couple of hybrid issuances, one at legacy WEC, one at Integrys, that could switch over in 2017 and (multiple speakers) 2017 for us -- 2017 for legacy WEC, 2016 for Integrys that could switch over, but they switch over at -- even if the Fed raised rates a little at incredibly low levels, like LIBOR plus 212, so they are very competitive if they do -- when they do switch over.
Jim von Riesemann - Analyst
Super. That's all I had. Thanks, guys. See you in Florida.
Gale Klappa - Chairman & CEO
Look forward to it.
Operator
Jonathan Arnold, Deutsche Bank.
Jonathan Arnold - Analyst
So just a couple of small things. Your O&M, as we think about pro forma and where it came in in the quarter, is $500 million a quarter, a decent run rate expectation, wrestling with the pro forma model?
Gale Klappa - Chairman & CEO
We are looking at each other here. It's within the ballpark, maybe a hair high, but it's within the ballpark.
Jonathan Arnold - Analyst
Okay. Thank you. And then we had one other. Just as we think about [TAG] in fourth quarter and try folding that in, are we likely to see dilution in Q4 or possibly accretion given the winter weighting?
Gale Klappa - Chairman & CEO
I wouldn't think you would see dilution in Q4, but remember one of the reasons why, Jonathan, we are focusing on legacy WEC performance for the remainder of the year is there are, as we go through purchase price accounting, as we go through transition costs, as we go through any remaining acquisition costs, which should be very small at this point, there are a lot of moving pieces and a lot of one-time things that affect the Integrys performance financially from a reporting standpoint in the fourth quarter.
So again, we think it's almost fruitless to try to give you a GAAP number and to concentrate on the GAAP number for the Integrys performance in the fourth quarter. Having said that, January 1, 2016, it's combined company, rock and roll.
Jonathan Arnold - Analyst
Okay, so from 2016, you are going to give -- you're not going to keep doing this a year after the close or anything like that?
Gale Klappa - Chairman & CEO
Absolutely not. You will see combined results. That's what we will focus on. That's what we report. Jonathan, that's what our earnings guidance that Pat just gave you for 2016 is based on.
Jonathan Arnold - Analyst
Yes, good. Okay, great. Well, thank you very much and thanks for the insights.
Operator
Paul Patterson, Glenrock Associates.
Paul Patterson - Analyst
I wanted to turn to the accelerated main replacement program in Illinois. So now it looks like the projections are that it will be considerably more CapEx, I would assume. Could you give us a flavor for how much we should be seeing annually that being driven by and just sort of the causation that we are seeing there and also the rate impact, I guess, cumulatively over this period of time. It just seems like a lot that we are reading about.
Gale Klappa - Chairman & CEO
I appreciate you asking the question. Let me clarify two or three very key points here. First of all, this was designed initially to be a 20-year program. When we walked into the door after the acquisition, there had been an estimate, a revised estimate made by the previous outsourced firm, that the cost might rise to as much as say $8 billion over the 20-year period. I don't think the previous management had confidence in that estimate. We did not have confidence in that estimate. That's why we brought in our experienced team and another outside nationally known firm to basically take a complete bottoms-up review.
Having said that, the legislation that enables this program to move forward with current and appropriate cost recovery caps the amount of capital spending on this program at roughly $250 million a year. From what I have seen personally over the last 120 days, it would be extremely difficult -- I mentioned earlier there are only so many streets you can dig up and you can't do a lot of this work in the dead of winter. So from a weather standpoint and just a sheer congestion and major city standpoint, I don't think you could technically just physically spend much more than about $250 million a year anyway. So I wouldn't make the assumption. I think it would be an inappropriate assumption that we would be spending much more on that advanced main replacement program in any given year than $250 million to $300 million. Does that help, Paul?
Paul Patterson - Analyst
It does help and I guess in terms of that $8 billion number, which clearly you guys are reviewing, when do you think we are going to get -- when will you guys get a better idea about what the -- when will you be able to share with us what you think the actual number will be?
And I'm just wondering you talk about digging up streets and stuff, there are some things that you hear about in which you could do things without digging up the street, if you follow me in terms of like liner stuff and what have you, I don't know. I am just wondering whether or not --.
Gale Klappa - Chairman & CEO
Yes, we are going to try fracking down there.
Paul Patterson - Analyst
Well that will solve some transportation issues.
Gale Klappa - Chairman & CEO
There's something called keyhole technology, which we are experimenting with right now. But having said that, just the sheer logistics, I would still believe that given the weather constraints and the sheer logistics, we are probably physically capped at the $250 million to $300 million a year.
Now you asked when are we going to see more specific estimates. Well, the date is November 30. We promised the Illinois Commerce Commission that we will file on November 30 our longer-term cost estimates for the 20-year period. Now, as you know, trying to estimate precisely the cost of a construction program that is going to span 20 years, you know the only thing we're going to be is wrong. So we will probably give a range of values. We will probably have a low case, a medium case and a high case and then I would expect that what we will really focus on is, okay, those are projections, but what are we going to do in the next three years to make the most progress in getting that natural gas delivery system as safe and efficient as possible.
I think you will see a broad range for a lengthy period of time, so a low case, high case, medium case and then we will really focus on what we plan to do in the next three years and what the cost of that is and what the progress will be. And all of that look forward to November 30.
Now in terms of rate impact, and I think -- I am glad you asked that question. The legislation basically caps at that $250 million to $300 million a year, caps consumer rate increases at an average of 4%, but it's very important to understand what that 4% is based on. That 4% is based on what we call base rates. So base rates make up like less than a third of a residential customer's gas bill. The rest is the commodity. So we are not talking about tremendous rate pressure here. We are talking about 4% off of -- we are talking about basically 4% on a third of the total customer bill each year.
Paul Patterson - Analyst
Okay, great. And then, I guess, just when you say the 20 years, this project has been going on for some time.
Gale Klappa - Chairman & CEO
Not really.
Paul Patterson - Analyst
It hasn't? So we are not talking 2030, what is the date time we are talking about, I guess?
Gale Klappa - Chairman & CEO
Well, it officially -- there was some work done I think in 2012 and 2013, but basically, under the legislation, really March of 2014. I think that the hope was that a lot could be accomplished by 2030. Again, we are taking a hard fresh bottoms-up look at this, but we are talking about a very extensive period of time. And the one thing -- and I've spent a lot of time personally in Chicago with the team over the last couple of months. And the one thing that is very clear to me is that from the Mayor's Office to the Common Council to the Illinois Commerce Commission, there is outstanding and common agreement that this program has to move forward. It has to be done efficiently. It has to be managed well. But Chicago has to have the modern efficient system that it deserves.
Paul Patterson - Analyst
Okay. Thanks so much.
Gale Klappa - Chairman & CEO
You're more than welcome, Paul.
Operator
Michael Lapides, Goldman Sachs.
Michael Lapides - Analyst
Hey, Gale, congrats on a good quarter. Real quickly, just when you think about transmission spend and the CapEx change at ATC, can you frame how much of the near term, meaning the next two to three years, has changed relative to what was prior -- previously in the public domain?
Allen Leverett - President
There's very little change. When you look at 10-year plan to 10-year plan, Michael, there's really very little change in the front end. And I'm sure you've seen these. If you look at the 10-year estimates, the previous estimates were in a range of 3.3 to 3.9. The new estimates were in a range of 3.7 to 4.5. So over a 10-year period, they are talking about somewhat more capital spending, but in the very short term, which I think was the source of your question, two to three years, not seeing a heck of a lot of change, which is kind of what you would expect because these projects take a long time to get approved and then they are typically multi-year in nature.
Michael Lapides - Analyst
And when you think about the next two to three, three to four years at ATC, how much of those projects have already received siding, already received permitting or close to shovel-ready or are virtually shovel-ready now?
Allen Leverett - President
Well, I would say anything two years out is virtually -- has already gone through the approvals because, again, going back to what I said, the projects are typically multi-year. And then as you get farther and farther out, obviously, less and less would already have gone through the regulatory process.
Gale Klappa - Chairman & CEO
Allen is exactly right. If you think about the gestation period on some of these larger projects, they can be -- from conceptual design to approval, they can be five years. So I think you could clearly conclude what Allen is saying that the next couple, two, three years, virtually everything they've included is largely through the approval process.
Michael Lapides - Analyst
Got it. And when you are looking at demand on the gas utility side, how different do you see demand or how much do you expect demand to differ in Wisconsin relative to Illinois and some of the other Integrys service areas?
Gale Klappa - Chairman & CEO
Well, I would expect, given normal weather conditions, demand in Wisconsin and Minnesota and to some extent Michigan to grow more strongly than Illinois simply because there's just not a lot of propane use in the city of Illinois. By contrast, Wisconsin, Michigan and Minnesota are 3 of the 10 heaviest propane-using states in the US. And for example, in Minnesota, recently, there was legislation passed that, in essence, reduces the upfront hook-up cost for customers to switch over to the natural gas delivery network and allows more of those capital costs to be basically put into rate base as opposed to the individual customer having to pay more for hooking into the system. And that was done because of the very significant concern in Minnesota about what happened in 2014 during the Polar Vortex with propane supplies. So we would expect Wisconsin, Minnesota and Michigan in terms of gas demand and growth in gas customers to be stronger.
Michael Lapides - Analyst
Got it. Thanks, guys. Much appreciate it.
Operator
Paul Ridzon, KeyBanc.
Paul Ridzon - Analyst
Now that you've had kind of a few months to digest the transaction, can you give us an update on maybe what you are seeing as potential synergy opportunities?
Gale Klappa - Chairman & CEO
Well, let me start by saying that we really have not had any major negative surprises. Essentially, I think we did a good job of due diligence and what we are seeing in terms of best practices, in terms of driving costs down, in terms of more efficient operations, I think all the potential we saw is really there. So I would first say the one upside for the past 120 days is the clear identification of infrastructure upgrades beyond what we thought in our due diligence. And that led to what I discussed about the higher capital spending on rate base opportunities here in the latter part of the decade.
In terms of cost reductions, remember this transaction was far more about growth than about cost reductions. The cost reductions we have estimated basically will be needed in any given year to help us make sure we earn our allowed rates of return. So again, I don't want to make -- I want to make sure that no one is thinking that there are going to be huge cost savings that are then going to somehow result in earnings above the allowed rates of return. That's not the plan and that's not what we are seeing.
I will say this though. I think long term there will be significant and tangible savings; there's no question about that. And even in Wisconsin, let me reiterate what we said earlier, and that is, over the next 10 years, I see in a combination of capital cost savings and O&M savings at least $1 billion of cost savings. Again, that's a combination of capital and O&M and the first tangible result of that was when we were able to, with the Commission's approval, we were able to take off the table the need for Wisconsin Public Service to build the Fox 3, which was a combined cycle natural gas unit that had been planned. That's a $600 million investment that we can postpone for a very long time.
So that's a tangible savings for customers right there.
We will see over time, for example, in just having to build only one, and it's being built by Integrys right now, only one new major customer information and billing system, the project is called ICE, I-C-E. Those projects are, Pat, $150 million, $120 million, $150 million a pop. Well, we are only going to need to build one of them and that's being built right now. See you can see all across our operations how we can drive cost savings over time. I hope that responds to your question.
Paul Ridzon - Analyst
It does. For a while, it seemed as though mining frac sand had some upside to it. What's the status of that industry?
Gale Klappa - Chairman & CEO
We have about 110 frac sand mining or processing operations in the western part of Wisconsin. That is up from literally 10 five years ago. So that industry literally has just burgeoned over the course of the past five years, 10 to 110. Now those 110 operations because of the price of oil and lesser demand for frac sand, those operations are down -- I think we are seeing about -- of those we are serving today with natural gas, about an 11% decline this year in their natural gas demand.
However, we were not serving anywhere near all of those 110 operations because we didn't have the infrastructure backbone to support that. I mentioned earlier that our West Central gas expansion project is now complete, that 85-mile line. That will allow us to sign up more of those operations. So we are going to see growth in the therms that we deliver to that industry in Western Wisconsin over time simply because we weren't serving that many of them during the boom times. As I say, they are down about 11% in terms of therms now, but we are going to be serving more of them now that we have completed the West Central line.
In fact, one of the major frac sand operators has just signed a contract with us to switch over from propane to natural gas. And remember, the ones we're not serving now are basically drying their sand with propane and their preference would be to move to less costly, more predictable natural gas. Does that respond to your question?
Paul Ridzon - Analyst
Perfectly. And then, lastly, just on the fresh look on main replacement, which way do you think that $8 billion number goes?
Gale Klappa - Chairman & CEO
When we have a firm number and file it on November 30, you will be the first to know.
Paul Ridzon - Analyst
I look forward to your call.
Gale Klappa - Chairman & CEO
Terrific. Thank you very much. All right. Well, ladies and gentlemen, I believe that concludes our conference call for today. Thank you again for taking part. If you have any other questions, please feel free to call Colleen Henderson or Beth Straka and the direct line to call is 414-221-2592. Have a good afternoon, everybody.