Corporate Responsibility Report 2012

Greenhouse Gas Emissions

Taking action to reduce greenhouse gas emissions

We are managing GHG emissions for the near, medium and long term. Near-term practices focus on:

  • Compliance: Many of our facilities are already required to reduce or offset their greenhouse gas emissions. In Alberta, nearly 700,000 tonnes of Capital Power’s GHG emissions were offset in 2012, and our U.S. facilities participated in regional emission licensing schemes that are reducing electricity sector emissions 10% by 2018. Capital Power is also developing new sources of power generation to replace coal-fired units that will be closed due to new Canadian federal regulations. By capacity, the regulation will close 14% of Alberta’s coal fleet by 2019, rising to 28% in 2027 and 59% by 2029.
  • Offsets: We are investing in a portfolio of carbon offset projects and participating in the development of carbon markets to meet current and future requirements. More than $22 million was invested in offsets in 2012. Since 2007, Capital Power has registered nearly 10 million tonnes of carbon offsets for the Alberta market.
  • Efficiency: We seek continuous improvement in the efficiency of our power generation fleet.
  • Renewables: We are investing in the development of renewable power sources. In 2012 we completed two wind farm projects, including the largest wind farm in Alberta. Two other wind facilities are under construction in Ontario. Our facilities in Southport and Roxboro, North Carolina have Renewable Energy Certificates (RECs), and blend a fuel made from recycled tires, biomass, wood waste and coal. Our North Carolina RECs are generated from a portion of the tire-derived fuel and all of the biomass. North Carolina has a mandatory renewable portfolio standard, and the RECs are marketed to state compliance buyers.

To lay the groundwork for medium- and long-term transition to lower-emission and zero-emission technologies, we also pursue:

  • Technology commercialization: We invest in the development and commercialization of new technologies, including Front End Engineering Design work for the construction of both zero emission and carbon capture technologies.
  • Scientific and engineering research: We support university scientists and engineers in both basic and applied research, including through our partnership in the University of Alberta’s Canadian Centre for Clean Coal/Carbon and Mineral Processing Technologies.

Capital Power's Greenhouse Gas Emissions

Across our North American operations, greenhouse gas (GHG) emissions were 11.40 million tonnes (MT) in 2012, compared to 11.98 MT in 2011. Emission volumes and emission intensity were slightly lower year-over-year, due to a higher gas to coal ratio across the fleet in 2012 compared to 2011. Gas-fired generation has about half the greenhouse gas intensity of coal-fired generation.

Year-over-year changes in GHG emissions, emission intensity, and offsets are generally caused by:

  • Changes in power production volume (the length of maintenance outages at thermal facilities can have a significant impact on single-year results from individual facilities);
  • The introduction of new technologies that increase efficiency or decrease emissions;
  • Changes in emission reduction or offset requirements; and
  • Changes in our generating fleet (the development and acquisition of cleaner facilities add to emission volumes while decreasing emission intensity, while the addition of non-emitting sources leaves emission volumes unchanged and decrease emission intensity).

Our fleet is significantly different today than it was in 2010 when we owned Capital Power Income L.P. (CPILP), which consisted of three hydro facilities, two biomass facilities, 13 natural gas facilities, and Roxboro and Southport, which use a combination of coal, biomass and tire-derived fuel. Therefore, our 2010 data shows higher net generation, lower greenhouse gases, and a lower intensity when compared to 2012 performance.

Our emissions profile

The fuel mix of our fleet includes coal/solid fuel, natural gas, and wind. Solid fuel generation creates higher and more types of emissions than natural gas, while wind has zero emissions. The most obvious determinant of emissions is the generation output, or how many hours per year the facilities operate.

Greenhouse gases

Our fleet is significantly different today than it was in 2010 when we owned Capital Power Income L.P. (CPILP), which consisted of three hydro facilities, two biomass facilities, 13 natural gas facilities, and Roxboro and Southport, which use a combination of coal, biomass and tire-derived fuel.

Therefore, our 2010 data shows higher net generation, lower greenhouse gases, and a lower intensity. In 2012, our greenhouse gas emissions were 11.40 million tCO2e, compared to 11.98 million tCO2e in 2011. Emission volumes and emission intensity were slightly lower than in 2011 due to a higher gas to coal ratio in 2012 compared to 2011. Gas-fired generation has about half the greenhouse gas intensity of coal-fired generation.

Tiverton, Rhode Island

Emissions Intensities1 - Greenhouse Gases

  Year Canada U.S. All

1. Emissions intensities include only power generation operations. Emissions intensities do not include emissions from indirect sources, such as those resulting from electricity usage at our offices. Intensity is calculated using the net production (MWh) from all Capital Power facilities, including all renewable, waste heat and fossil fuel facilities.

2. In accordance with the Greenhouse Gas Protocol: A Corporate Accounting and Reporting Standard [World Resources Institute and World Business Council for Sustainable Development (2004)], carbon dioxide released at facilities from combustion of biomass and landfill gas are not included in emissions totals and intensities.

3. GHG emission intensities are stack emissions only, and do not reflect the impact of offsets.

Greenhouse Gases 2,3
(tonnes CO2E/MWh) (2)
2010 0.78 0.33 0.65
2011 0.91 0.43 0.75
2012 0.90 0.43 0.73

Total Air Emissions - Greenhouse Gases

  Year Canada U.S. All

Values represent direct emissions from power generation operations.

Greenhouse Gases
(tonnes CO2E)
2010 9,915,000 1,762,000 11,677,000
2011 9,626,000 2,351,000 11,977,000
2012 8,997,000 2,400,000 11,397,000

Greenhouse gas emissions

Greenhouse gas emissions and intensity from FOSSIL FUEL facilities

  2010 2011 2012
Greenhouse gases (tonnes CO2E) 11,320,000 11,529,000 10,906,000
Net production (MWh) 15,777,000 15,108,000 14,663,000
Fossil-fuel emission intensity (tonnes CO2E/MWh) 0.72 0.76 0.74

Greenhouse gas emissions FLEET-WIDE and intensity from Canadian and U.S. facilities

  2010 2011 2012
Greenhouse gases (tonnes CO2E) 11,677,000 11,977,000 11,397,000
Net production (MWh) 18,037,000 15,939,000 15,626,000
Fleet emission intensity (tonnes CO2E/MWh) 0.65 0.75 0.73

Reducing Emissions Through Offsets and Licensing

Offsetting emissions in Alberta

  • In 2012, Capital Power retired 699,076 tonnes of GHG offsets in Alberta, which were created primarily from a variety of agricultural, fuel switching and coal mine methane projects.

Our Alberta plants are subject to the Specified Gas Emitters Regulation (SGER) under the Climate Change and Emissions Management Act (Alberta). SGER requires companies that emit more than 100,000 MT of carbon dioxide to reduce the emission intensity of a facility by 2% per year to a maximum of 12%, compared to the calculated baseline intensity for the specific facility. These companies may choose to purchase carbon offsets equal to their reduction requirements as one of four compliance mechanisms. Alternative compliance strategies would be to physically reduce production, purchase Emission Performance Credits from other companies or pay $15/tonne into the Climate Change and Emissions Management Corporation’s Technology Fund, widely referred to as the “Tech Fund”. As the risk-free compliance option, the price of a Tech Fund contribution sets a cap on the market price for SGER reductions.

Capital Power uses offsets as a primary means for meeting compliance obligations under SGER.

The baseline emission intensity for Genesee 1 and Genesee 2 is the average emissions intensity from 2003-2005. However, for new facilities, such as our Clover Bar Energy Centre, the baseline emission intensity is based on the facility’s third full year of commercial operation. In 2012, under SGER, Genesee 1 and Genesee 2 were subjected to a CO2e intensity reduction target of 12%, and Genesee 3 had a CO2e intensity reduction target of 8%. 2012 was the first year that our Clover Bar Energy Centre was subjected to SGER GHG reduction targets starting at 2%. We retired 83,167 tonnes of Alberta SGER GHG offsets in 2012. These reductions came from a variety of Alberta-based No-/Low-Till Agriculture and Conservation Cropping offset projects.

In addition to SGER, we are also required to reduce our share of Genesee 3’s GHG emissions by approximately 53%, which is to the level of a combined-cycle natural gas plant. Offsets have been retired every year since commissioning in 2005 and will continue to be retired to meet future obligations. In 2012 Capital Power retired 615,909 tonnes of offsets from a variety of agricultural, fuel switching and coal mine methane projects on behalf of Genesee 3, in addition to the offsets already retired under the abovementioned SGER program.

Leading Emission Offset Practices

  • In 2012, Capital Power invested $22.5 million in emission offsets. Since 2007, Capital Power has registered nearly 10 million tonnes of carbon offsets for the Alberta market.

We have been acquiring offsets for almost a decade and have entered into more than 35 offset purchase agreements. Approximately $22.5 million was invested in offsets in 2012, which is slightly higher than our investment in 2011.

We have expertise in the origination, purchase, and sale of verified emission offsets. We also developed two of the Alberta Offset System Quantification Protocols.

Our early, active and responsible participation in emission offset practices has delivered nearly six million tonnes of Alberta SGER offsets since 2007, and approximately four million Natural Gas Combined Cycle (NGCC) offsets from 2007 to 2012. Emission offsets are audited and verified by independent third parties.

We continue to invest in emission offset markets and have become an active buyer of Climate Reserve Tonnes (CRT) offsets. We are also an active member of the International Emissions Trading Association.

We have purchased offsets from a variety of Alberta and CRT projects in 2012. Some of these project types include composting, ozone depleting substances, forestry, agricultural methane, no-tillage agriculture and landfill gas.

Licensing emissions in the United States

Our facilities in Connecticut, Maine, and Rhode Island are subject to the Regional Greenhouse Gas Initiative (RGGI). RGGI is a co-operative effort by nine states that have capped CO2 emissions from the power sector and mandated an emissions reduction of 10% by 2018. A limited number of allowances are available for purchase each year, and facilities are required to hold sufficient allowances to equal their CO2 emissions over a three-year control period. Facilities may also meet a portion of their requirement by applying certified offsets from qualifying GHG-reduction projects that are located within one of the RGGI states.

To date, our New England assets have complied with the RGGI regulations through the procurement of allowances in auctions or secondary markets. In 2012, we transferred 2,101,940 tonnes of emissions allowances into asset compliance accounts for the second compliance period, which runs from January 1, 2012 to December 31, 2014.

Future emission reductions from coal unit retirements

  • New Canadian regulations will close 14% of Alberta’s coal fired generation by 2019, rising to 28% in 2027 and 59% by 2029, significantly reducing future greenhouse gas emissions.

Capital Power has long supported Canadian targets and regulations to mandate emission reductions from coal-fired power generation, including national and provincial regulations that would significantly reduce GHG and air emissions from coal-fired electricity plants, helping Canada achieve its Copenhagen commitment to lower GHGs.

In 2012, Canadian federal regulations were finalized which will permanently reduce emissions from coal-fired power generation. The regulation mandates the closure of coal-fired generation facilities in Canada once they have reached a defined end of life and prohibits new coal-fired generation after 2015, unless units are either retrofitted or constructed to achieve carbon capture and storage. In the near to medium term, it is anticipated that units will be retired and replaced with alternative forms of generation, including natural-gas fired generation.

The Canadian regulation mandating orderly coal unit retirements provide certainty for generators, accelerates carbon reduction, avoids stranded investment, and facilitates planning of cleaner replacement generation.

In Alberta, for example, the regulation signals the timing and volumes of replacement baseload generation that will be required and provides certainty about greenhouse gas reduction. By capacity, the regulation will close 14% of Alberta’s coal fleet by 2019, rising to 28% in 2027 and 59% by 2029.

Replacement generation for all the pre-2025 coal unit retirements is already in development, and includes the proposed Capital Power Energy Centre at Genesee, a baseload gas-fired facility.

  1. See Report Scope for an explanation of which facilities and offsets are included in these totals. For example, no emissions or offsets are included with respect to Capital Power’s 50% ownership interest in Keephills 3 because Capital Power does not hold the operating permit; however, 100% of emissions and offsets are included from Genesee 3, where Capital Power is the operator, despite Capital Power owning only 50% of Genesee 3. This approach also aligns with Canadian federal reporting requirements, where operators report 100% of facility emissions rather than emissions based on their proportional ownership interest.
  2. For 2012, offsets by facility and compliance regime were CBEC 22,000 SGER (2012 first year of compliance); Genesee 3 SGER: 100,062 (85,912 in 2011); Genesee 3 Natural Gas Combined Cycle (NGCC): 665,940 (703,841 in 2011); Genesee 1 and 2 SGER: 11,136 (13,489 in 2011); New England facilities under Regional Greenhouse Gas Initiative (RGGI): 2,101,940 (2,096,254 in 2011).

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