AREVA EPR closer to construction in United States

BC Hydro Customer Crisis Fund Surplus highlights unused grants, pilot program imbalance, and calls to reduce fees or expand eligibility. Ratepayers, regulators, and social agencies urge awareness, rebates, and aid for overdue electricity bills.

Key Points

A funding carryover from BC Hydro's crisis grants, sparking debate over fee reductions or more aid eligibility.

✅ $2.9M surplus from 25-cent monthly customer fee

✅ Only 2,250 grants issued; awareness and eligibility questioned

✅ Regulator may refund balance or adjust program design

BC Hydro is sitting on a surplus of about $2.9 million in its customer crisis fund, even as BC Hydro rates rise 3% across the province, leading to calls for the utility to reduce its take from the average customer or provide more money to those in need.

B.C. Liberal Energy Critic Greg Kyllo said if the imbalance continues in the year-old pilot program, amid a provincial rate freeze announced by the province, it’s time to cut the monthly 25 cent fee in half.

"If the grant requirement or the need in the province is going to remain where it is, they should look at rolling back the contribution level in the fund," he told CTV News Vancouver from Salmon Arm.

But social agencies who were part of the consultation around the fund in the beginning said it’s more likely that people in need don’t know about the fund and more time is necessary to get the word out.

"If they collect the money, then the program’s got to change to make sure more people are able to be helped," said Gudrun Langolf of the Council of Senior Citizens Organizations of BC.

The customer crisis fund was started in spring 2018 to give people short-term relief when they can’t pay their electricity bills, especially as a $2 monthly hike pressures household budgets. Customers can apply to get a grant of up to $500 to keep the lights on, and up to $600 if electricity heats their homes.

The public utility took in about 25 cents per customer per month which added up to a revenue of $4.5 million in the year since the program started, BC Hydro confirmed to CTV News.

But the agency only gave out 2,250 grants totalling $850,000.

Administration costs added up around $750,000 – leaving the $2.9 million remaining.

The news will come as a welcome relief to those who suddenly struggle to pay their hydro bills, particularly as Alberta ratepayers are on the hook under a utility deferral program elsewhere in Canada.

Some people who come into Disability Alliance B.C. are often anxious and emotional when they’re suddenly unable to pay their bills, said Shar Saremi, an advocate there.

"I’ve had people crying. I’ve had people who have experienced a loss in the family," she said. "A lot of the time people are stressed out, anxious, really upset. They are looking for assistance, and they aren’t sure what is available for them."

She said people are only eligible if their bills are under $1,000, which could be cutting out the people who are most in need. And because the program is in its first year, it could be undersubscribed, she said.

"A lot of people don’t know about the program, don’t know how to apply, or what kind of assistance is out there," Saremi said.

The fund was established thanks to an order from the B.C. Utilities Commission, the utilities regulator in the province.

The pilot program is going to be examined by the regulator at the end of its first year.

"Any remaining balance in the account at the end of the pilot would be returned to residential ratepayers," says a BCUC fact sheet, as BC Hydro rates are set to rise 3.75% over two years. The decision on exactly what to do with the money hasn’t yet been made.

In Manitoba, a similar program is by donation, and in Newfoundland and Labrador a lump-sum credit was offered to bill payers in a separate initiative. That program raised about $200,000 from customers and $60,000 in other income. It spent $199,000 on grants to applicants, but lost about $20,000 a year.

In Ontario, private utilities are expected to raise 0.12 per cent of their revenue, and Hydro One reconnections have highlighted the stakes for nonpayment there. Across the province, those utilities gave out about $7.3 million in grants. Any unused funds in one year are rolled over to the following year.

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Electric mining equipment enables zero-emission, diesel-free operations at Goldcorp's Borden mine, using Sandvik battery-electric drills and LHD trucks to cut ventilation costs, noise, and maintenance while improving underground air quality.

Key Points

Battery-powered mining equipment replaces diesel, cutting emissions and ventilation costs in underground operations.

✅ Cuts diesel use, heat load, and noise in underground headings.

✅ Reduces ventilation infrastructure and operating expense.

✅ Improves air quality, worker health, and equipment uptime.

Mining operations get a lot of flack for creating environmental problems around the world. Yet they provide much of the basic material that keeps the global economy humming. Some mining companies are drilling down in their efforts to clean up their acts, exploring solutions such as recovering mine heat for power to reduce environmental impact.

As the world’s fourth-largest gold mining company Goldcorp has received its share of criticism about the impact it has on the environment.

In 2016, the Canadian company decided to do something about it. It partnered with mining-equipment company Sandvik and began to convert one of its mines into an all-electric operation, a process that is expected to take until 2021.

The efforts to build an all-electric mine began with the Sandvik DD422iE in Goldcorp’s Borden mine in Ontario, Canada.

Goldcorp's Borden mine in Borden, Ontario, CanadaGoldcorp's Borden mine in Borden, Ontario, Canada

The machine weighs 60,000 pounds and runs non-stop on a giant cord. It has a 75-kwh sodium nickel chloride battery to buffer power demands, a crucial consideration as power-hungry Bitcoin facilities can trigger curtailments during heat waves, and to move the drill from one part of the mine to another.

This electric rock-chewing machine removes the need for the immense ventilation systems needed to clean the emissions that diesel engines normally spew beneath the surface in a conventional mining operation, though the overall footprint depends on electricity sources, as regions with Clean B.C. power imports illustrate in practice.

These electric devices improve air quality, dramatically reduce noise pollution, and remove costly maintenance of internal combustion engines, Goldcorp says.

More importantly, when these electric boring machines are used across the board, it will eliminate the negative health effects those diesel drills have on miners.

“It would be a challenge to go back,” says big drill operator Adam Ladouceur.

Mining with electric equipment also removes second- or third-highest expenditure in mining, the diesel fuel used to power the drills, said Goldcorp spokesman Pierre Noel, even as industries pursue dedicated energy deals like Bitcoin mining in Medicine Hat to manage power costs. (The biggest expense is the cost of labor.)

Electric load, haul, dump machine at Goldcorp Borden mine in OntarioElectric load, haul, dump machine at Goldcorp Borden mine in Ontario

Aside from initial cost, the electric Borden mine will save approximately $7 million ($9 million Canadian) annually just on diesel, propane and electricity.

Along with various sizes of electric drills and excavating tools, Goldcorp has started using electric powered LHD (load, haul, dump) trucks to crush and remove the ore it extracts, and Sandvik is working to increase the charging speed for battery packs in the 40-ton electric trucks which transport the ore out of the mines, while utilities add capacity with new BC generating stations coming online.

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BC Hydro drought operations address climate change impacts with hydropower scheduling, reservoir management, water conservation, inflow forecasting, and fish habitat protection across the Lower Mainland and Vancouver Island while maintaining electricity generation from storage facilities.

Key Points

BC Hydro drought operations conserve water, protect fish, and sustain hydropower during extended heat and low inflows.

✅ Proactive reservoir releases protect downstream salmon spawning.

✅ Reduced flows at Puntledge, Coquitlam, and Ruskin/Stave facilities.

✅ System relies on northern storage to maintain electricity supply.

BC Hydro is adjusting its operating plans around power generation as extended heat and little forecast rain continue to impact the province, a report says.

“Unpredictable weather patterns related to climate change are expected to continue in the years ahead and BC Hydro is constantly adapting to these evolving conditions, especially after events such as record demand in 2021 that tested the grid,” said the report, titled “Casting drought: How climate change is contributing to uncertain weather and how BC Hydro’s generation system is adapting.”

The study said there is no concern with BC Hydro being able to continue to deliver power through the drought because there is enough water at its larger facilities, even as issues like crypto mining electricity use draw scrutiny from observers.

Still, it said, with no meaningful precipitation in the forecast, its smaller facilities in the Lower Mainland and on Vancouver Island will continue to see record low or near record low inflows for this time of the year.

“In the Lower Mainland, inflows since the beginning of September are ranked in the bottom three compared to historical records,” the report said.

The report said the hydroelectric system is directly impacted by variations in weather and the record-setting, unseasonably dry and warm weather this fall highlights the impacts of climate change, while demand patterns can be counterintuitive, as electricity use even increased during Earth Hour 2018 in some areas, hinting at challenges to come.

It noted symptoms of climate change include increased frequency of extreme events like drought and intense storms, and rapid glacial melt.

“With the extremely hot and dry conditions, BC Hydro has been taking proactive steps at many of our South Coast facilities for months to conserve water to protect the downstream fish habit,” spokesperson Mora Scott said. “We began holding back water in July and August at some facilities anticipating the dry conditions to help ensure we would have water storage for the later summer and early fall salmon spawning.”

Scott said BC Hydro’s reservoirs play an important role in managing these difficult conditions by using storage and planning releases to provide protection to downstream river flows. The reservoirs are, in effect, a battery waiting to be used for power.

While the dry conditions have had an impact on BC Hydro’s watersheds, several unregulated natural river systems — not related to BC Hydro — have fared worse, with rivers drying up and thousands of fish killed, the report said.

BC Hydro is currently seeing the most significant impacts on operations at Puntledge and Campbell River on Vancouver Island as well as Coquitlam and Ruskin/Stave in the Lower Mainland.

To help manage water levels on Vancouver Island, BC Hydro reduced Puntledge River flows by one-third last week and on the Lower Mainland reduced flows at Coquitlam by one-third and Ruskin/Stave by one quarter.

However, the utility company said, there are no concerns about continued power delivery.

“British Columbians benefit from BC Hydro’s integrated, provincial electricity system, which helps send power across the province, including to Vancouver Island, and programs like the winter payment plan support customers during colder months,” staff said.

Most of the electricity generated and used in B.C. is produced by larger facilities in the north and southeast of the province — and while water levels in those areas are below normal levels, there is enough water to meet the province’s power needs, even as additions like Site C's electricity remain a subject of debate among observers.

The Glacier Media investigation found a quarter of BC Hydro's power comes from the Mica, Revelstoke and Hugh Keenleyside dams on the Columbia River. Some 29% comes from dams in the Peace region, including the under-construction Site C project that has faced cost overruns. At certain points of the year, those reservoirs are reliant on glacier water.

Still, BC Hydro remains optimistic.

Forecasts are currently showing little rain in the near-term; however, historically, precipitation and inflows show up by the end of October. If that does not happen, BC Hydro said it would continue to closely track weather and inflow forecasts to adapt its operations to protect fish, while regional cooperation such as bridging with Alberta remains part of broader policy discussions.

Among things BC Hydro said it is doing to adapt are:

Continuously working to improve its weather and inflow forecasting;
Expanding its hydroclimate monitoring technology, including custom-made solutions that have been designed in-house, as well as upgrading snow survey stations to automated, real-time snow and climate stations, and;
Investing in capital projects — like spillway gate replacements — that will increase resiliency of the system to climate change.

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Global Electricity Demand Surge underscores rising coal generation, lagging renewables deployment, and escalating emissions, as nations prioritize reliable power; nuclear energy and grid decarbonization emerge as pivotal solutions to the electricity transition.

Key Points

A rapid post-lockdown rise in power consumption, outpacing renewables growth and driving higher coal use and emissions.

✅ Coal generation rises faster than wind and solar additions

✅ Emissions increase as economies prioritize reliable baseload power

✅ Nuclear power touted for rapid grid decarbonization

By Robert Bryce

As the Covid lockdowns are easing, the global economy is recovering and that recovery is fueling blistering growth in electricity use. The latest data from Ember, the London-based “climate and energy think tank focused on accelerating the global electricity transition,” show that global power demand soared by about 5% in the first half of 2021. That’s faster growth than was happening back in 2018 when electricity use was increasing by about 4% per year.

The numbers from Ember also show that despite lots of talk about the urgent need to reduce greenhouse gas emissions, coal demand for power generation continues to grow and emissions from the electric sector continue to grow: up by 5% over the first half of 2019. In addition, they show that while about half of the growth in electricity demand was met by wind and solar, as low-emissions sources are set to cover almost all new demand over the next three years, overall growth in electricity use is still outstripping the growth in renewables. 

The soaring use of electricity, and increasing emissions from power generation confirm the sage wisdom of Rasheed Wallace, the volatile former power forward with the Detroit Pistons and other NBA teams, and now an assistant coach at the  University of Memphis, who coined the catchphrase: “Ball don’t lie.” If Wallace or one of his teammates was called for a foul during a basketball game that he thought was undeserved, and the opposing player missed the ensuing free throws, Wallace would often holler, “ball don’t lie,” as if the basketball itself was pronouncing judgment on the referee’s errant call. 

I often think about Wallace’s catchphrase while looking at global energy and power trends and substitute my own phrase: numbers don’t lie.

Over the past few weeks Ember, BP, and the International Energy Agency have all published reports which come to the same two conclusions: that countries all around the world — and China's electricity sector in particular — are doing whatever they need to do to get the electricity they need to grow their economies. Second, they are using lots of coal to get that juice. 

As I discuss in my recent book, A Question of Power: Electricity and the Wealth of Nations, Electricity is the world’s most important and fastest-growing form of energy. The Ember data proves that. At a growth rate of 5%, global electricity use will double in about 14 years, and as surging electricity demand is putting power systems under strain around the world, the electricity sector also accounts for the biggest single share of global carbon dioxide emissions: about 25 percent. Thus, if we are to have any hope of cutting global emissions, the electricity sector is pivotal. Further, the soaring use of electricity shows that low-income people and countries around the world are not content to stay in the dark. They want to live high-energy lives with access to all the electronic riches that we take for granted.  

 Ember’s data clearly shows that decarbonizing the global electric grid will require finding a substitute for coal. Indeed, coal use may be plummeting in the U.S. and western Europe, where U.S. electricity consumption has been declining, but over the past two years, several developing countries including Mongolia, China, Bangladesh, Vietnam, Kazakhstan, Pakistan, and India, all boosted their use of coal. This was particularly obvious in China, where, between the first half of 2019 and the first half of 2021, electricity demand jumped by about 14%. Of that increase, coal-fired generation provided roughly twice as much new electricity as wind and solar combined. In Pakistan, electricity demand jumped by about 7%, and coal provided more than three times as much new electricity as nuclear and about three times as much as hydro. (Wind and solar did not grow at all in Pakistan over that period.) 

Hate coal all you like, but its century-long persistence in power generation proves its importance. That persistence proves that climate change concerns are not as important to most consumers and policymakers as reliable electricity. In 2010, Roger Pielke Jr. dubbed this the Iron Law of Climate Policy which says “When policies on emissions reductions collide with policies focused on economic growth, economic growth will win out every time.” Pielke elaborated on that point, saying the Iron Law is a “boundary condition on policy design that is every bit as limiting as is the second law of thermodynamics, and it holds everywhere around the world, in rich and poor countries alike. It says that even if people are willing to bear some costs to reduce emissions (and experience shows that they are), they are willing to go only so far.”

Over the past five years, I’ve written a book about electricity, co-produced a feature-length documentary film about it (Juice: How Electricity Explains the World), and launched a podcast that focuses largely on energy and power. I’m convinced that Pielke’s claim is exactly right and should be extended to electricity and dubbed the Iron Law of Electricity which says, “when forced to choose between dirty electricity and no electricity, people will choose dirty electricity every time.” I saw this at work in electricity-poor places all over the world, including India, Lebanon, and Puerto Rico. 

Pielke, a professor at the University of Colorado as well as a highly regarded author on the politics of climate change and sports governance, has since elaborated on the Iron Law. During an interview in Juice, he explained it thusly: “The Iron Law says we’re not going to reduce emissions by willingly getting poor. Rich people aren't going to want to get poorer, poor people aren't going to want to get poorer.” He continued, “If there is one thing that we can count on it is that policymakers will be rewarded by populations if they make people wealthier. We're doing everything we can to try to get richer as nations, as communities, as individuals. If we want to reduce emissions, we really have only one place to go and that's technology.”

Pielke’s point reminds me of another of my favorite energy analysts, Robert Rapier, who made a salient point in his Forbes column last week. He wrote, “Despite the blistering growth rate of renewables, it’s important to keep in mind that overall global energy consumption is growing. Even though global renewable energy consumption has increased by about 21 exajoules in the past decade, overall energy consumption has increased by 51 exajoules. Increased fossil fuel consumption made up most of this growth, with every category of fossil fuels showing increased consumption over the decade.” 

The punchline here – despite my tangential reference to Rasheed Wallace — is obvious: The claims that massive reductions in global carbon dioxide emissions must happen soon are being mocked by the numbers. Countries around the world are acting in their interest, particularly when it comes to their electricity needs and that is resulting in big increases in emissions. As Ember concludes in their report, wind and solar are growing, and some analyses suggest renewables could eclipse coal by 2025, but the “electricity transition” is “not happening fast enough.”

Ember explains that in the first half of 2021, wind and solar output exceeded the output of the world’s nuclear reactors for the first time. It also noted that over the past two years, “Nuclear generation fell by 2% compared to pre-pandemic levels, as closures at older plants across the OECD, especially amid debates over European nuclear trends, exceeded the new capacity in China.” While that may cheer anti-nuclear activists at groups like Greenpeace and Friends of the Earth, the truth is obvious: the only way – repeat, the only way – the electric sector will achieve significant reductions in carbon dioxide emissions is if we can replace lots of coal-fired generation with nuclear reactors and do so in relatively short order, meaning the next decade or so. Renewables are politically popular and they are growing, but they cannot, will not, be able to match the soaring demand for the electricity that is needed to sustain modern economies and bring developing countries out of the darkness and into modernity. 

Countries like China, Vietnam, India, and others need an alternative to coal for power generation. They need new nuclear reactors that are smaller, safer, and cheaper than the existing designs. And they need it soon. I will be writing about those reactors in future columns.

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Schneider Electric Notre Dame Restoration delivers energy management, automation, and modern electrical infrastructure, boosting safety, sustainability, smart monitoring, efficient lighting, and power distribution to protect heritage while reducing consumption and future-proofing the cathedral.

Key Points

Schneider Electric upgrades Notre Dame's electrical systems to enhance safety, sustainability, automation, and efficiency.

✅ Energy management modernizes power distribution and lighting.

✅ Advanced safety and monitoring reduce fire risk.

✅ Sustainable automation lowers consumption while preserving heritage.

Schneider Electric, a global leader in energy management and automation, exemplified by an AI and technology partnership in Paris, has played a significant role in the restoration of the Notre Dame Cathedral in Paris following the devastating fire of April 2019. The company has contributed by providing its expertise in electrical systems, ensuring the cathedral’s systems are not only restored but also modernized with energy-efficient solutions. Schneider Electric’s technology has been crucial in rebuilding the cathedral's electrical infrastructure, focusing on safety, sustainability, and preserving the iconic monument for future generations.

The fire, which caused widespread damage to the cathedral’s roof and spire, raised concerns about both the physical restoration and the integrity of the building’s systems, including rising ransomware threats to power grids that affect critical infrastructure. As Notre Dame is one of the most visited and revered landmarks in the world, the restoration process required advanced technical solutions to meet the cathedral’s complex needs while maintaining its historical authenticity.

Schneider Electric's contribution to the project has been multifaceted. The company’s solutions helped restore the electrical systems in a way that reduces the energy consumption of the building, improving sustainability without compromising the historical essence of the structure. Schneider Electric worked closely with architects, engineers, and restoration experts to implement innovative energy management technologies, such as advanced power distribution, lighting systems, and monitoring solutions like synchrophasor technology for enhanced grid visibility.

In addition to energy-efficient solutions, Schneider Electric’s efforts in safety and automation have been vital. The company provided expertise in reinforcing the electrical safety systems, leveraging digital transformer stations to improve reliability, which is especially important in a building as old as Notre Dame. The fire highlighted the importance of modern safety systems, and Schneider Electric’s technology ensures that the restored cathedral will be better protected in the future, with advanced monitoring systems capable of detecting any anomalies or potential hazards.

Schneider Electric’s involvement also aligns with its broader commitment to sustainability and energy efficiency, echoing calls to invest in a smarter electricity infrastructure across regions. By modernizing Notre Dame’s electrical infrastructure, the company is helping the cathedral move toward a more sustainable future. Their work represents the fusion of cutting-edge technology and historic preservation, ensuring that the building remains an iconic symbol of French culture while adapting to the modern world.

The restoration of Notre Dame is a massive undertaking, with thousands of workers and experts from various fields involved in its revival. Schneider Electric’s contribution highlights the importance of collaboration between heritage conservationists and modern technology companies, and reflects developments in HVDC technology in Europe that are shaping modern grids. The integration of such advanced energy management solutions allows the cathedral to function efficiently while maintaining the integrity of its architectural design and historical significance.

As the restoration progresses, Schneider Electric’s efforts will continue to support the cathedral’s recovery, with the ultimate goal of reopening Notre Dame to the public, reflecting best practices in planning for growing electricity needs in major cities. Their role in this project not only contributes to the physical restoration of the building but also ensures that it remains a symbol of resilience, cultural heritage, and the importance of combining tradition with innovation.

Schneider Electric’s involvement in the restoration of Notre Dame Cathedral is a testament to how modern technology can be seamlessly integrated into historic preservation efforts. The company’s work in enhancing the cathedral’s electrical systems has been crucial in restoring and future-proofing the monument, ensuring that it will continue to be a beacon of French heritage for generations to come.

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Tucson Electric Power Coal Phaseout advances an Integrated Resource Plan to exit Springerville coal by 2032, lift renewables past 70 percent by 2035, add wind, solar, battery storage, and cut carbon emissions 80 percent.

Key Points

A 2032 coal exit and 2035 plan to lift renewables above 70 percent, add wind, solar, storage, and cut CO2 80 percent.

✅ Coal purchases end at Springerville units by 2032

✅ Renewables exceed 70 percent of load by 2035

✅ 80 percent CO2 cut from 2005 baseline via wind, solar, storage

In a dramatic policy shift, Tucson Electric Power says it will stop using coal to generate electricity by 2032 and will increase renewable energy's share of its energy load to more than 70% by 2035.

As part of that change, the utility will stop buying electricity from its two units at its coal-fired Springerville Generating Station by 2032. The plant, TEP's biggest power source, provides about 35% of its energy.

The utility already had planned to start up two New Mexico wind farms and a solar storage plant in the Tucson area by next year. The new plan calls for adding an additional 2,000 megawatts of renewable energy capacity by 2035.

The utility's switch from fossil fuels is spelled out in the plan, submitted to the Arizona Corporation Commission, amid shifts in federal power plant rules that could affect implementation. Called an Integrated Resource Plan, it would reduce TEP's carbon dioxide emissions 80% by 2035 compared with 2005 levels.

The plan drew generally positive reviews from a number of environmentalists and other representatives of an advisory committee that had worked with TEP for a year.

Two commissioners, Chairman Bob Burns and Tucsonan Lea Marquez Peterson, also generally praised the plan, although they held off on final judgment.

University of Arizona researchers said the plan would likely meet the utility's share of the worldwide goal of holding down global temperatures to less than 2 degrees Celsius, or about 3.6 degrees Fahrenheit, above pre-industrial levels, even as studies find that climate change threatens grid reliability in many regions.

But a representative of AARP and the Pima Council on Aging expressed concern because the plan would require 1% annual electric rate increases a year to put into effect.

Officials in the eastern Arizona town of Springerville aren't happy.

And Sierra Club official Sandy Bahr said the plan doesn't move fast enough to get TEP off coal. She listed 14 separate units of various Western coal-fired plants that are scheduled to shut down sooner than 2032, many in the 2020s.

But TEP says the plan best balances costs and environmental benefits compared with 24 others it reviewed.

"We know our customers want safe, reliable energy from resources that are both affordable and environmentally responsible. TEP's 2020 Integrated Resource Plan will help us maintain that delicate balance," TEP CEO David Hutchens wrote in the forward to the plan.

The plan isn't legally binding but is aimed at sending a signal to regulators and the public about TEP's future direction. TEP and other regulated Arizona utilities update such plans every three years.

TEP has been one of the West's more fossil-fuel-friendly utilities. It stuck with coal even as many other utilities were moving away from it, including Alliant Energy's carbon-neutral plan to cut emissions and costs, and as the Sierra Club called on utilities to move beyond what it termed a highly polluting energy source that emits large quantities of heat-trapping greenhouse gases linked by scientists to global warming.

Last year, TEP got 13% of its electricity from renewables such as wind farms and solar plants along with photovoltaic solar panels atop individual homes. Fossil fuels coal and natural gas supplied the rest, a University of Arizona study paid for by TEP found.

Economics, not just emissions, a big factor

TEP's previous resource plan, from 2017, called for boosting renewable use to 30% by 2030 and to cut coal to 38% of its electric load by then from 69% in 2017, reflecting broader 2017 utility trends across the industry.

A TEP official said last week the utility is heading in a different direction not only due to concerns about greenhouse gas emissions but because of changing economics.

"For the last several decades, coal was the most economical resource. It was the lowest-cost resource to supply energy for our customers, and it wasn't really close," said Jeff Yockey, TEP's resource planning director.

But over the past few years, first natural gas prices and more recently solar and wind energy prices have fallen dramatically, he said.

Their prices are projected to keep falling, along with the cost of battery-fueled storage of solar energy for use when the sun is down, he said.

"Coal just isn't the most economical resource" now, Yockey said.

Yet the utility still needs, for now, the extra energy capacity that coal provides, he said, even as other states outline ways to improve grid reliability through targeted investments.

"Being a utility with no nuclear or hydro(electric) energy, with coal, there is reliability, a fuel on the ground, 30 or 90 days supply," he said. "It's the only source not subject to disruption in the next hour. It's our only long-term, stable fuel supply. Over time, we will be able to overcome that."

UA researchers, community panel worked on plan

TEP paid the UA $100,000 to have three researchers prepare two reports, one comparing 24 different proposals and a second comparing TEP's fossil fuel/renewable split with those of other utilities.

Also, the utility appointed an advisory council representing environmental, business and government interests that met regularly to guide TEP in producing the plan. The utility chose a preferred energy "portfolio," Yockey said.

The goal "was very much about basically achieving significant emissions reductions as quickly as we can and as cost effectively as we can," he said. TEP wanted the biggest cumulative emission cut possible over 15 years.

"If it was just about cost, we wouldn't have selected the portfolio that we selected. It wasn't the lowest cost portfolio."

UA assistant research professors Ben McMahan and Will Holmgren said combined carbon dioxide emission reductions from TEP's new plan over 15 years would be expected to hit the Paris accord's 2-degree target.

"There is considerable uncertainty about what will happen between now and 2050, but the preferred portfolio's early start on reductions and lowest cumulative emissions is certainly a positive sign that well below 2C is achievable," the researchers said in an email.

Environmentalists pleased, but some want coal cut sooner

The Sierra Club, Western Resource Advocates, the Southwest Energy Efficiency Project and Pima County offered varying degrees of praise for the new TEP plan.

In a memo Friday, County Administrator Chuck Huckelberry congratulated TEP for "the comprehensive, inclusive and transparent process" used to develop the plan.

Because of UA's involvement, TEP's advisory council and the public "can feel confident that the utility is on track to make significant progress in curbing greenhouse gas emissions to combat climate change," Huckelberry wrote.

The TEP plan "is the most aggressive commitment to reducing emissions by a utility in Arizona," said Autumn Johnson of Western Resource Advocates in a news release.

"Adding clean energy generation and storage while accelerating the retirement of coal units will ensure a healthier and better future for Arizonans," said Johnson, an energy policy analyst in Phoenix.

The Sierra Club will have a technical expert review the plan and already wants more energy savings, said Bahr, director of the group's Grand Canyon chapter. But overall, this plan is a step in the right direction for TEP, she said.

By comparison, Arizona Public Service's new resource plan only calls for 45% renewable energy by 2030, Bahr noted, while California regulators consider more power plants to ensure reliability. APS committed to going coal-free by 2031.

A Sierra Club proposal that the UA reviewed called for TEP to quit coal by 2027.

But TEP analyzed that proposal and concluded it would require $300 million in investments and would reduce the utility's cumulative emissions by only 2.4 million tons, to 70.2 million tons by 2035, Yockey said.

The Sierra Club plan was the most expensive portfolio investigated, Yockey said.

"The difference is in the timing. We still have a fair amount of value in our coal plants which we need to depreciate, which we do over time," Yockey said. "Trying to replace the capacity that coal provides in the near term with storage and solar is very expensive, although those costs are declining."

Seniors on fixed incomes could be hurt, advocate says

Rene Pina, an advisory council member representing two senior citizen organizations, praised the plan's goals but was concerned about impacts of even 1% annual rate increases on elderly people on fixed incomes.

They can't always handle such an increase, he said.

One possible fix is that TEP could ease eligibility requirements for its low-income energy assistance program, aligning with equity-focused electricity regulation principles, to allow more seniors to benefit, said Pina, representing AARP and the Pima Council on Aging.

"The program is structured so it just barely disqualifies most of our seniors. Their social security pension is just barely over the low-income limit. It can easily be adjusted without any problems to the utility," Pina said.

Advisory council member Rob Lamb, an engineer with GHLN, an architecture-engineering firm, said he was very pleased with TEP's plan.

"One of the things a lot of people don't realize when they put together a plan like that, is they have to balance environment with 'Hey, what's the reliability of service? Are we going to be able to keep our rates for something that will work?'" Lamb said.

"This a very balanced and resilient portfolio."

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