Xcel Energy

Control and Efficiency Projects for 2012

We have a number of efficiency and emission-control projects that were completed in 2012 or underway that will reduce emissions and modernize our facilities.

Location Project Description Completion Date
Upper Midwest
Sherco Units 1 and 2 Emission control upgrades: Sparger project for controlling SO2 (40 % improvement) and new or improved low-NOx burner systems (45% improvement) 2014
Breaker Replacement Project Replace six SF6 substation breakers: reduction in SF6 emissions 2012
St. Anthony Falls Hydro
Unit 4
Turbine upgrade to improve efficiency 82% and increase power 24%. 2012
Big Falls Hydro
Unit 1
Turbine upgrade to improve efficiency 92% and increase power 15%. 2012
Wissota Hydro
Unit 4
Turbine upgrade to improve efficiency 90% and increase power 26%. 2012
Colorado
Cherokee
Unit 1
Retired through the Clean Air-Clean Jobs project resulting in an annual reduction of 643,000 tons CO2, 2,900 tons NOx,and 2,100 tons SO2 and 3 pounds mercury 2012
Pawnee Clean Air-Clean Jobs emission control project: installation of LSD and SCR to reduce SO2 and NOx. 2014
 Arapahoe Clean Air-Clean Jobs emission control project, which includes retirement of Arapahoe 3 in 2013 and switch to natural gas on Arapahoe 4 in 2014. Emission reductions from Arapahoe 3 retirement include an annual reductions of  350,000 tons of CO2, 1250 tons of NOx, and 900 tons of SO2. 2014
Hayden Clean Air-Clean Jobs emission control project: installation of SCR’s on Units 1 and 2 to reduce NOx. 2015 (Unit 1)
2016 (Unit 2)
Texas/New Mexico
Tolk
Unit 1
Low-NOx burner and separated over-fire air equipment for reducing NOx emissions about 30 percent 2012
Tolk
Unit 2
Low-NOx burner and separated over-fire air equipment for reducing NOx emissions about 30 percent 2017

About the Report

We published our first corporate responsibility report (formerly known as the Triple Bottom Line report) in April 2005, with the contents covering the 2004 calendar year, and we have published a similar report in each following year. Our report is based on Global Reporting Initiative (GRI) G3 Sustainability Reporting Guidelines, the most widely used sustainability reporting framework in the world. Additionally, we incorporate the GRI’s Electric Utilities Sector Supplement indicators wherever possible.

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