Allen Fossil Plant Emissions

What TVA is doing about emissions at Allen

TVA has taken a number of steps to make the efficient generation of power at Allen as clean as possible:

  • The plant is equipped with electrostatic precipitators that capture ash from the burning coal.
  • The use of low-sulfur coal from the western United States limits emissions of sulfur dioxide.
  • A technology called overfire air limits the production of nitrogen oxides that contribute to the formation of ozone and acid rain. This technology involves modifications that reduce the oxygen available to form nitrogen oxides in the furnaces’ combustion zones.
  • All three coal units at Allen operate SCRs, reducing nitrogen oxide emissions by up to 90 percent.
  • In support of environmental agreements, TVA will retire the Allen coal-fired units no later than Dec. 31, 2018, replacing them with natural-gas fired combined cycle units.
  • Allen combustion turbines burn low-emitting natural gas or ultra-low-sulfur fuel oil.

Sulfur dioxide

 

See raw data for this chart

Year Coal Combustion Turbines*
1974 79408  
1975 99727  
1976 106568  
1977 111432  
1978 103189  
1979 75602  
1980 73989  
1981 74620  
1982 44935  
1983 68640  
1984 60853  
1985 65717  
1986 62143  
1987 73712  
1988 62774  
1989 52561  
1990 59704  
1991 53844  
1992 57614  
1993 80216  
1994 79250  
1995 48274  
1996 20332  
1997 21323  
1998 20211  
1999 13681  
2000 18862 4
2001 15454 24
2002 18711 6
2003 18785 18
2004 23495 5
2005 23882 4
2006 17413 3
2007 13210 1
2008 12495 1
2009 11871 2
2010 11049 9
2011 10969 5
2012 9609 4
2013 9991 5
2014 9750 9
2015 6950 2
2016 7693 3
2017 7636 1

Additional historical emission data for combustion turbines will be added when it becomes available.

*Data includes 32 tons from 2000 to 2014 for units that produce less than 25 megawatts and are not required to be reported to the Environmental Protection Agency.

View more information on sulfur dioxide and what TVA is doing about it.

Nitrogen oxides

 

See raw data for this chart

Year Coal Combustion Turbines*
1974 26058  
1975 30992  
1976 35907  
1977 32416  
1978 31612  
1979 30644  
1980 32855  
1981 33834  
1982 21357  
1983 31643  
1984 28082  
1985 30148  
1986 27139  
1987 33386  
1988 27491  
1989 25141  
1990 29580  
1991 28078  
1992 28406  
1993 40305  
1994 42277  
1995 38673  
1996 28967  
1997 29193  
1998 26389  
1999 16215  
2000 18708 287
2001 18560 26
2002 14471 44
2003 11515 35
2004 11302 11
2005 12491 12
2006 13265 47
2007 12628 29
2008 8057 7
2009 2603 4
2010 2449 24
2011 2531 33
2012 1807 9
2013 1937 1
2014 1941 23
2015 1467 6
2016 1495 11
2017 1582 1

Additional historical emission data for combustion turbines will be added when it becomes available.

*Data includes 88 tons from 2000 to 2014 for units that produce less than 25 megawatts and are not required to be reported to the Environmental Protection Agency.

View more information on nitrogen oxides and what TVA is doing about them.

Carbon dioxide

 

See raw data for this chart

Year Coal Combustion Turbines*
1995 4863072 0
1996 4341469 0
1997 5027025 0
1998 5072807 0
1999 3469872 0
2000 5112502 92688
2001 4921528 7032
2002 5366473 13650
2003 5434209 6620
2004 5046074 2205
2005 5337930 2481
2006 5733667 7468
2007 5476954 3188
2008 5359344 554
2009 5210346 380
2010 4981959 2274
2011 4890479 2199
2012 4433339 426
2013 4735258 382
2014 4594144 8689
2015 3634983 1422
2016 3967907 3106
2017 3974924 244

Additional historical emission data for combustion turbines will be added when it becomes available.

*Data includes 143,265 tons from 2000 to 2014 for units that produce less than 25 megawatts and are not required to be reported to the Environmental Protection Agency.

View more information on carbon dioxide and what TVA is doing about it.

Toxics Release Inventory

2015 data

All amounts are in pounds

Chemical / Chemical Category Air Water Land Off-Site Disposal Total
Hydrochloric Acid (aerosol) 79,000 0 0 0 79,000
Hydrogen Fluoride 28,000 0 0 0 28,000
Sulfuric Acid (aerosol) 8 0 0 0 8
Ammonia 78,000 69 0 0 78,069
Antimony Compounds          
Arsenic Compounds          
Barium Compounds 1,729 20,000 790,000 2,800 814,529
Beryllium Compounds          
Cadmium Compounds          
Chromium Compounds          
Cobalt Compounds          
Copper Compounds 141 2,600 22,000 0 24,741
Lead Compounds 90 0 5,200 139 5,429
Manganese Compounds 238 0 33,000 0 33,238
Mercury Compounds 110 7 31 6 154
Nickel Compounds          
Selenium Compounds          
Silver Compounds          
Thallium Compounds          
Vanadium Compounds 151 2,800 27,000 0 29,951
Zinc Compounds 991 2,800 13,000 0 16,791
Benzo(g,h,i)perylene 0 0 0 0 0
Naphthalene 13 0 0 0 13
Nitrate Compounds          
Dioxin (grams) 1 0 0 0 1
Polycyclic Aromatic Compounds 3 0 3 0 6
Hydrazine          
Total 188,474 28,276 890,234 2,945 1,109,929
           
Gross MWh Generated: 3,474,940        
Pounds Released per MWh: 0.319