Construction of the Oak Creek expansion project began on June 29, 2005, and is on schedule to begin operation of Unit 1 in 2009 and Unit 2 in 2010.  Currently, there are approximately 3,000 people working on-site.  Overall project construction is approximately 60 percent complete.

• Unit 1 & 2 activities
  Foundation work on the building of the Unit 1 boiler began in January 2006.  Steel erection on Unit 1 began in May 2006 and reached its full height of 280 feet in March 2007.  It is anticipated that the project will utilize more than 28,000 tons of structural steel to construct the needed facilities.
  
  Work on Unit 1 currently consists of installing the remaining infrastructure, final stages of boiler erection, and turbine/generator assembly.  The first boiler section was set in place on May 3, 2007 and the Unit 1 generator stator was set in place on May 11, 2007.
  
  Foundation work for Unit 2 began in May 2006.  Structural steel erection of the Unit 2 boiler building began in March 2007 and reached its full height of 280 feet in September 2007.  Work on Unit 2 currently consists of installing the remaining infrastructure and boiler erection.  Unit 2 boiler erection began on May 6, 2008, with the hanging of the furnace frontwall and the Unit 2 generator stator was set in place on July 17, 2008.
  
  An air quality control system (AQCS) will be installed on both units to significantly reduce emissions.  In May 2006, foundation work on the Unit 1 AQCS began.  Erection of the Unit 1 absorber vessel began in fall 2006 and was completed in June 2007.  Erection of the Unit 2 absorber vessel began in May 2007 and was completed in September 2007.

Work on Unit 1 currently consists of installing internal equipment for the wet electrostatic precipitator (WESP), remaining steel and internals for the absorber, and installing the internals for the baghouse.  Work on Unit 2 currently consists of erecting lower structural steel and lower internal equipment for the WESP, remaining steel and internals for the absorber, and erecting structural steel for the baghouse. 

• Chimney
  The units will utilize a common chimney that will be approximately 550 feet tall and 70 feet in diameter.  In May 2006, preparation for foundation work began and by October 2006 the concrete work was ready to begin.  To construct the chimney a slip-form was used and concrete was poured continuously for 41 days - 24 hours a day.  The concrete outer shell was completed in December 2006.  Inside the chimney there will be two 25 feet diameter fiber glass flues, one serving each unit.  These flues are being constructed on-site, and the first section was installed within the concrete shell in September 2007.  The entire chimney is expected to be completed in late 2008.

Updated 7/23/08