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									Company Alabama Power Co Alabama Power Co Alabama Power Co Alabama Power Co Alabama Power Co Alabama Power Co Allegheny Energy Supply Co LLC Allegheny Energy Supply Co LLC Allegheny Energy Supply Co LLC Allete Inc Allete Inc Allete Inc Allete Inc Allete Inc Allete Inc

Facility Barry Power Station Gadsden Power Station Gorgas Power Station Gorgas Power Station Greene County Power Station James H. Miller Jr. Power Station Pleasants Power Station R Paul Smith Power Station R Paul Smith Power Station Clay Boswell Power Station Clay Boswell Power Station Clay Boswell Power Station Clay Boswell Power Station Clay Boswell Power Station Clay Boswell Power Station

Unit Barry Ash Pond Ash Pond (NID #1428) Gypsum Pond Ash Pond (NID #1198) Rattlesnake Dam Ash Pond Ash Pond (NID #1101) McElroy's Run Embankment Lagoon Dam #3 Lagoon Dam #4 Units 1, 2 & 4 Fly Ash and Scrubber Slurry Pond Central Wastewater Treatment Pond Bucks

City

State AL AL AL AL AL AL WV MD MD MN MN MN MN MN MN

1 Hazard Potential None Low None None None Low High Significant Significant None None None None None None

2 Year Commissioned 1965 1948 2007 1954 1964 1978 1978 early 1960's early 1960's 1973 1980 1972 1973 1979 1979

East Gadsden Parrish Parrish Demopolis Quinton Willow island Williamsport Williamsport Cohasset Cohasset

3 3 2 3 Fly Bottom Boiler 3 Expansion(s) Ash Ash Slag FGD 1972, 1992, 1998, 2004 Yes Yes Yes Yes 1976, 1979, 1983 Yes Yes Yes Yes No 1979, 2007 1996 Yes Yes Yes Yes Yes Yes Yes No Yes No Yes Yes No Yes Yes Yes Yes Yes Yes No Yes No Yes No Yes

3 Other Residuals

4 PE Design No No No No No Yes Yes No No Yes Yes No No Yes Yes

5 Last 5 Next Company Company 6 Last 6 Next 7 Significant 4 PE 4 PE Assessm Assessm Regulatory Regulatory Deficiencies Constructed Monitored ent ent Inspection Inspection Identified No No No No No Yes Yes No No Yes Yes No No Yes Yes Yes CBI Claim CBI Claim CBI Claim CBI Claim CBI Claim Yes CBI Claim CBI Claim CBI Claim CBI Claim CBI Claim No CBI Claim CBI Claim CBI Claim CBI Claim CBI Claim Yes CBI Claim CBI Claim CBI Claim CBI Claim CBI Claim Yes CBI Claim CBI Claim CBI Claim CBI Claim CBI Claim Yes CBI Claim CBI Claim CBI Claim CBI Claim CBI Claim Yes 3/2009 No 2/2009 No 2/2009 No No No No No No 3/1/2009 2/1/2009 2/1/2009 No No No No No No No No No

7 Significant Deficiencies CBI Claim CBI Claim CBI Claim CBI Claim CBI Claim CBI Claim

No Yes gypsum only Yes Yes Yes Yes Yes Yes No Yes No No No No No No No Yes No No No No other No No other No No other

7 8 Surface 8 Storage 8 Unit 9 Corrective Area Capacity Height Historical Measures (acre) (acre ft) (ft) Releases CBI CBI Claim CBI Claim CBI Claim Claim No CBI CBI Claim CBI Claim CBI Claim Claim No CBI CBI Claim CBI Claim CBI Claim Claim No CBI CBI Claim CBI Claim CBI Claim Claim No CBI CBI Claim CBI Claim CBI Claim Claim No CBI CBI Claim CBI Claim CBI Claim Claim No No No No No No No No No No 219 7 13 645 2 1 200 645 645 3182 9 1 149 1041 1130 233 50 40 49 0 20 40 49 49 No No No No

9 Historical Releases Identified

Additional Data

Coal Pile Sump Cohasset Inactive Units 1, 2 & 3 Bottom Ash Pond Cohasset Unit 3 Fly Ash Pond Units 1 - 4 Bottom Ash Pond Cohasset Cohasset

No Apr 2008 - Overflow into Yes nearby lake No No No

(8) Height: 0 Ft (below grade)

Allete Inc Allete Inc Alliant Energy Alliant Energy Alliant Energy Alliant Energy

Alliant Energy

Alliant Energy

Alliant Energy

Alliant Energy

Alliant Energy

Alliant Energy

Alliant Energy

Alliant Energy

Alliant Energy

Alliant Energy

Alliant Energy

Alliant Energy

Alliant Energy

Alliant Energy

Alliant Energy

Alliant Energy

Alliant Energy

Alliant Energy

Alliant Energy

Alliant Energy

Alliant Energy

Alliant Energy

Alliant Energy

Alliant Energy

Syl Laskin Power Station Syl Laskin Power Station Columbia Power Station Columbia Power Station Columbia Power Station Columbia Power Station Interstate Power & Light Co - Burlington Generating Station Interstate Power & Light Co - Burlington Generating Station Interstate Power & Light Co - Burlington Generating Station Interstate Power & Light Co - Burlington Generating Station Interstate Power & Light Co - Burlington Generating Station Interstate Power & Light Co - Dubuque Generating Station Interstate Power & Light Co - Fox Lake Generating Station Interstate Power & Light Co - M.L. Kapp Generating Station Interstate Power & Light Co - M.L. Kapp Generating Station Interstate Power & Light Co - M.L. Kapp Generating Station Interstate Power & Light Co - M.L. Kapp Generating Station Interstate Power & Light Co - Ottuma-Midland CCR Landfill Interstate Power & Light Co - Ottuma-Midland CCR Landfill Interstate Power & Light Co - Ottumwa Generating Station Interstate Power & Light Co - Ottumwa Generating Station Interstate Power & Light Co - Prairie Creek Generating Station Interstate Power & Light Co - Prairie Creek Generating Station Interstate Power & Light Co - Prairie Creek Generating Station Interstate Power & Light Co - Prairie Creek Generating Station Interstate Power & Light Co - Prairie Creek Generating Station Interstate Power & Light Co - Prairie Creek Generating Station Interstate Power & Light Co - Prairie Creek Generating Station Interstate Power & Light Co - Prairie Creek Generating Station Interstate Power & Light Co - Prairie Creek Generating Station

Cell E Cells A, B, C & D (retired) Polishing Pond Landfill Storm Water Pond Secondary Ash Pond Primary Ash Pond

Aurora Aurora Pardeeville Pardeeville Pardeeville Pardeeville

MN MN WI WI WI WI

None None None None None None

2000 early 1960's 1975 1984 1975 1975

Yes Yes Yes Yes Yes Yes

Yes Yes Yes Yes Yes Yes

Yes Yes No No No No

No No No No No No

other other other other other

Yes No Yes Yes Yes Yes

Yes No No Yes No No

No No No No No No

12/1/2000 3/2009 3/2009 3/2009 3/2009

6/1/2008

NPDES groundwater monitoring well exceedances (no structural integrity Yes issues) No No No No No

No No No No No No

23 73 1 11 16 8

99 436 0 0 51 36

28 10 0 10 23 23

No No No No No No

Lower Ash Pond

Burlington

IA

None

1971

Yes

Yes

No

No Other

Yes

Yes

No 3/4/2009

No

No

23

68

3

No

Economizer Ash Pond

Burlington

IA

None

1986

1990, 1992

Yes

Yes

No

No Other

Yes

Yes

No 3/4/2009

No

No

11

155

10

No

Ash Seal Pond

Burlington

IA

None

1968

Yes

Yes

No

No Other

Yes

Yes

No 3/4/2009

No

No

4

46

15

No

Upper Ash Pond

Burlington

IA

None

1971

Yes

Yes

No

No Other

Yes

Yes

No 3/4/2009

No

No

13

66

5

No

Main Ash Pond

Burlington

IA

None

1980

Yes

Yes

No

No Other

Yes

Yes

No 3/4/2009

No

No

17

85

5

No

Ash Channel

Dubuque

IA

None

1954

1964, 2000

No

Yes

No

No Other

Yes

Yes

No 3/12/2009

No

No

0

0

0

No

8- height below grade

Ash Pond Emergency Ash Secondary Settling Pond

Sherburn

MN

None

1950

Yes

Yes

No

No Other

No

No

No 3/20/2009

No

No

2

8

5

No

Clinton

IA

None

1965

2000

Yes

Yes

No

No Other

Yes

Yes

No 3/13/2009

No

No

0

0

10

No

Main Ash Primary Settling Pond Emergency Ash Primary Settling Pond Main Ash Secondary Settling Pond

Clinton

IA

None

1965

2000

Yes

Yes

No

No Other

Yes

Yes

No 3/13/2009

No

No

7

41

25

No

Clinton

IA

None

1965

2000

Yes

Yes

No

No Other

Yes

Yes

No 3/13/2009

No

No

1

1

2

No

Clinton

IA

None

1965

2000

Yes

Yes

No

No Other

Yes

Yes

No 3/13/2009

No

No

2

9

10

No

Monofill Leachate Retention Pond Cedar Rapids Monofill Storm Water Retention Pond

IA

None

1995

No

No

No

No Other

Yes

Yes

No 3/5/2009

No

No

0

0

10

No

Cedar Rapids

IA

None

1995

No

No

No

No Other

Yes

Yes

No 3/5/2009

No

No

2

2

17

No

Zero Liquid Discharge Pond

Ottumwa

IA

None

1981

Yes

No

No

No Other

Yes

Yes

No 3/5/2009

No

No

17

8801

25

No

Main Ash Pond

Ottumwa

IA

None

1981

Yes

Yes

No

No Other

Yes

Yes

No 3/5/2009

No

No

18

178

25

No

Coal Pile Runoff Pond

Cedar Rapids

IA

None

2009 1965 (estimated) 1965 (estimated) 1965 (estimated) 1965 (estimated) 1965 (estimated) 1965 (estimated) 1965 (estimated) 1965 (estimated)

No

No

No

No Other (Coal fines)

Yes

Yes

No 3/6/2009

No

No

1

0

4

No

Ash Pond #2

Cedar Rapids

IA

None

Yes

Yes

No

No Other

Yes

Yes

No 3/6/2009

No

No

1

3

0

No

Final Coal Pile Runoff Pond

Cedar Rapids

IA

None

No

No

No

No Other (Coal fines)

Yes

Yes

No 3/6/2009

No

No

0

2

3

No

Ash Pond #10

Cedar Rapids

IA

None

Yes

Yes

No

No Other

Yes

Yes

No 3/6/2009

No

No

0

1

0

No

Ash Pond #9 - Dumper Building

Cedar Rapids

IA

None

Yes

Yes

No

No Other

Yes

Yes

No 3/6/2009

No

No

0

1

0

No

Ash Pond #8 - Plant Drains

Cedar Rapids

IA

None

Yes

Yes

No

No Other

Yes

Yes

No 3/6/2009

No

No

0

0

0

No

Ash Pond #7

Cedar Rapids

IA

None

Yes

Yes

No

No Other

Yes

Yes

No 3/6/2009

No

No

0

1

5

No

Ash Pond #3

Cedar Rapids

IA

None

Yes

Yes

No

No Other

Yes

Yes

No 3/6/2009

No

No

0

3

0

No

Ash Pond #1

Cedar Rapids

IA

None

Yes

Yes

No

No Other

Yes

Yes

No 3/6/2009

No

No

0

2

0

No

Company

Alliant Energy

Alliant Energy

Alliant Energy

Alliant Energy

Alliant Energy

Alliant Energy

Alliant Energy

Alliant Energy

Alliant Energy

Alliant Energy Alliant Energy Alliant Energy

Facility Interstate Power & Light Co - Prairie Creek Generating Station Interstate Power & Light Co - Prairie Creek Generating Station Interstate Power & Light Co - Prairie Creek Generating Station Interstate Power & Light Co - Sixth Street Generating Station Interstate Power & Light Co - Sixth Street Generating Station Interstate Power & Light Co - Sixth Street Generating Station Interstate Power & Light Co - Sixth Street Generating Station Interstate Power & Light Co - Sutherland Generating Station Interstate Power & Light Co - Sutherland Generating Station Interstate Power & Light Co - Sutherland Generating Station Lansing Power Station Lansing Power Station WI Power & Light Co Edgewater Generating Station WI Power & Light Co Edgewater Generating Station WI Power & Light Co Edgewater Generating Station WI Power & Light Co Edgewater Generating Station WI Power & Light Co Edgewater Generating Station WI Power & Light Co Edgewater Generating Station WI Power & Light Co Nelson Dewey Generating Station WI Power & Light Co Nelson Dewey Generating Station WI Power & Light Co -Rock River Generating WI Power & Light Co -Rock River Generating WI Power & Light Co -Rock River Generating WI Power & Light Co -Rock River Generating

Unit

City

State

1 Hazard Potential

2 Year Commissioned 1965 (estimated) 1965 (estimated) 1965 (estimated) 1930's (estimate) 1930's (estimate) 1930's (estimate) 1930's (estimate)

3 3 2 3 Fly Bottom Boiler 3 Expansion(s) Ash Ash Slag FGD

3 Other Residuals

4 PE Design

5 Last 5 Next Company Company 6 Last 6 Next 7 Significant 4 PE 4 PE Assessm Assessm Regulatory Regulatory Deficiencies Constructed Monitored ent ent Inspection Inspection Identified

7 Significant Deficiencies

7 8 Surface 8 Storage 8 Unit 9 Corrective Area Capacity Height Historical Measures (acre) (acre ft) (ft) Releases

9 Historical Releases Identified

Additional Data

Ash Pond #6

Cedar Rapids

IA

None

Yes

Yes

No

No Other

Yes

Yes

No 3/6/2009

No

No

1

5

0

No

Ash Pond #5

Cedar Rapids

IA

None

Yes

Yes

No

No Other

Yes

Yes

No 3/6/2009

No

No

1

5

0

No

Ash Pond #4

Cedar Rapids

IA

None

Yes

Yes

No

No Other

Yes

Yes

No 3/6/2009

No

No

1

3

0

No

Ash Pond 1

Cedar Rapids

IA

None

Yes

Yes

No

No Other

No

No

No 3/6/2009

No

No

0

4

15

No

Ash Pond 2

Cedar Rapids

IA

None

Yes

Yes

No

No Other

No

No

No 3/6/2009

No

No

1

0

10

No

Ash Pond 3

Cedar Rapids

IA

None

Yes

Yes

No

No Other

No

No

No 3/6/2009

No

No

4

8

10

No

Ash Pond 4

Cedar Rapids

IA

None

Yes

Yes

No

No Other

No

No

No 3/6/2009

No

No

3

13

15

No

Unit 1 & 2 Initial Settling Pond

Marshalltown

IA

None

1955

2006

Yes

Yes

Yes

No Other

No

No

No 3/19/2009

No

No

0

0

7

No

Main Ash Settling Pond

Marshalltown

IA

None

1955

2006

Yes

Yes

Yes

No Other

Yes

Yes

No 3/19/2009

No

No

6

3

7

No

Unit 3 Inititial Settling Pond Main Ash Pond Lower Ash Pond

Marshalltown Lansing Lansing

IA IA IA

None None None

1961 1975 1975

2006

Yes Yes Yes

Yes Yes Yes

Yes No No

No Other ash transport water, waste No water ash transport water, waste No water, boiler blowdown

No Yes Yes

No Yes Yes

No 3/19/2009 No 3/12/2009 No 3/12/2009 3/6/2007 3/6/2007

No No No

No No No

0 15 0

0 194 0

7 20 8

No No No (8) surface area 0.2 acres

Alliant Energy

A Ponds (Two)

Sheboygan

WI

None

1977

Yes

No

No

No Other

Yes

Yes

No 4/27/2009

No

No

4

11

19

No

Alliant Energy

B Pond

Sheboygan

WI

None

1977

Yes

No

Yes

No Other

Yes

Yes

No 4/27/2009

No

No

2

4

18

No

Alliant Energy

C Pond

Sheboygan

WI

None

1969

Yes

No

Yes

No Other

Yes

Yes

No 4/27/2009

No

No

1

1

6

No

Alliant Energy

F Pond I43 Coal Combustion landfill Contact Pond

Sheboygan

WI

None

1969

1977

Yes

No

Yes

No Other

Yes

Yes

No 4/27/2009

No

No

1

5

10

No

Alliant Energy

Sheboygan

WI

None

1985

No

No

No

No Other

Yes

Yes

No 4/27/2009

No

No

1

1

5

No

Alliant Energy

Slag Pond

Sheboygan

WI

None

1985

No

No

Yes

No Other

Yes

Yes

No 4/27/2009

No

No

2

5

18

No

Alliant Energy

WPDES Pond

Cassville

WI

None

1976

1999

Yes

No

Yes

No Other

Yes

Yes

No 3/3/2009

No

No

5

5

10

No

Alliant Energy Alliant Energy Alliant Energy Alliant Energy Alliant Energy Ameren Energy Generating Co Ameren Energy Generating Co Ameren Energy Generating Co Ameren Energy Generating Co Ameren Energy Generating Co Ameren Energy Generating Co Ameren Energy Generating Co Ameren Energy Generating Co Ameren Energy Generating Co Ameren Energy Generating Co Ameren Energy Generating Co Ameren UE Ameren UE Ameren UE Ameren UE Ameren UE Ameren UE Ameren UE Ameren UE Ameren UE

Slag Pond Slag Pond Final WPDES Pond WPDES Pond 1 WPDES Pond 2

Cassville Beloit Beloit Beloit Beloit Canton Canton Bartonville Hustonville Hustonville Hustonville Hustonville

WI WI WI WI WI IL IL IL IL IL IL IL

None None None None None None None None None Low None None

1959 1978 1978 1978 1978 1976 1986 1960 1940 1986 2000 2000

1976, 1996

Yes Yes Yes Yes Yes Yes Yes Yes No Yes Yes Yes

No No No No No Yes Yes Yes Yes No Yes Yes

Yes Yes Yes Yes Yes

No Other No Other No Other No Other No Other

Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes

Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes

No 3/3/2009 No 3/31/2009 No 3/31/2009 No 3/31/2009 No 3/31/2009 Yes 2009 Yes 2009 Yes 2009 Yes 2009 Yes 2009 Yes 2009 Yes 2009

No No No No No No No No No No No No

No No No No No No No No No No No No

4 3 4 2 1 58 85 89 1 14 4 2

4 3 4 2 1 1900 800 1000 3 50 10 5

10 5 10 16 16 50 45 32 15 22 17 12

No No No No No No No No No No No No 2006 - less than 500 gallons spilled from the Fly Yes Ash Pond No No No No No No No No No No No No (5) 1A - reassess stability of dike; 1B - seepage control on D/S slope

Duck Creek Power Station Ash Pond 1 Duck Creek Power Station Ash Pond 2 E. D. Edwards Power Station Ash Pond Hutsonville Power Station Hutsonville Power Station Hutsonville Power Station Hutsonville Power Station Bottom Ash Pond Ash Pond A Ash Pond B Ash Pond C

No Yes No Yes No No No No No No other, process water No No No No other

Meredosia Power Station Meredosia Power Station Newton Power Station Newton Power Station Labadie Power Station Labadie Power Station Meramec Power Station Meramec Power Station Meramec Power Station Meramec Power Station Rush Island Power Station Sioux Power Station Sioux Power Station Appalachian Power Co Clinch River Appalachian Power Co Clinch River Appalachian Power Co Glen Lyn Power Station Appalachian Power Co Glen Lyn Power Station Appalachian Power Co John E. Amos Power Station

Fly Ash Pond Bottom Ash Pond Secondary Ash Pond Primary Ash Pond Bottom Ash Pond Fly Ash Pond Retention Pond Old Fly Ash Pond Bottom Ash Pond (3) New Fly Ash Pond Ash Pond Bottom Ash Pond Fly Ash Pond

Meredosia Meredosia Newton Newton Labadie Labadie St. Louis St. Louis St. Louis St. Louis Festus West Alton West Alton

IL IL IL IL MO MO MO MO MO MO MO MO MO

None None None None None None None None None None None None None

1968 1972 1977 1977 1970 1993 1977 2000 1950's 2003 1976 1967 1994

Yes No Yes Yes Yes Yes Yes Yes No Yes Yes Yes Yes

No Yes Yes Yes Yes No Yes No Yes No Yes No No

No No No

No No No other, process water

Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes

Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes

Yes 2009 Yes 2009 Yes 2009 Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes 2009 2009 2009 2009 2009 2009 2009 2009 2009 2009

No No No No No No No No No No No No No

No No No No No No No No No No No No No

186 34 9 400 154 79 1 18 14 14 104 47 60

650 139

24 24 29

No No other, process water No No other, process water No No No No No No other, process water No No No No No No other, process water Yes Yes other, process water No No other, process water

2000 11403 1353 260 171 190 6745 1859 676

47 30 30 25 25 25 25 35 27 22

American Electric Power American Electric Power American Electric Power American Electric Power

Bottom Ash Pond 1A/1B Bottom Ash Pond 2 Fly Ash Pond Bottom Ash Pond Glen Lyn Glen Lyn

VA VA VA VA

Low Low Low Low

1964 1964 1965 1963

1971

Yes Yes Yes No

Yes Yes No Yes

No No No No

No No No No

No No No No

No No No No

Yes 1/7/2009 No 2008

2010

3/19/2008 3/19/2008 3/18/2008 3/18/2008

No No No No

No No No No

45 0 8 5

1240 1332 185 90

55 73 43 35

No No No No

Yes 1/13/2009 2010 Yes 1/13/2009 2010

American Electric Power

Fly Ash Pond

St. Albans

WV

High

1971

Yes

No

No

No

Yes

Yes

Yes 10/1/2008 2009

2/10/2009

No

No

175

2687

223

No

Company

American Electric Power

American Electric Power

Facility Appalachian Power Co John E. Amos Power Station Appalachian Power Co Kanawha River Power Station

Unit

City

State

1 Hazard Potential

2 Year Commissioned

3 3 2 3 Fly Bottom Boiler 3 Expansion(s) Ash Ash Slag FGD

3 Other Residuals

4 PE Design

5 Last 5 Next Company Company 6 Last 6 Next 7 Significant 4 PE 4 PE Assessm Assessm Regulatory Regulatory Deficiencies Constructed Monitored ent ent Inspection Inspection Identified

7 Significant Deficiencies

7 8 Surface 8 Storage 8 Unit 9 Corrective Area Capacity Height Historical Measures (acre) (acre ft) (ft) Releases

9 Historical Releases Identified

Additional Data

Bottom Ash Complex

St. Albans

WV

Significant

1971

No

Yes

No

No

Yes

Yes

Yes 9/24/2008 2010

2/10/2009

No clear emergency spillway

Yes

30

220

24

No

Bottom Ash Complex

Glasgow

WV

None

1977

No

Yes

No

No

No

No

No

No

No

6

116

0

No

American Electric Power

Appalachian Power Co Mountaineer Power Station Bottom Ash Complex Appalachian Power Co Philip Sporn Power Station Fly Ash Pond Appalachian Power Co Philip Sporn Power Station Cardinal Operating Co Cardinal Power Station Cardinal Operating Co Cardinal Power Station Columbus Southern Power Co - Conesville Power Station Columbus Southern Power Co - Picway Power Station IN MI Power Co - Rockport Power Station IN MI Power Co - Tanners Creek Power Station IN MI Power Co - Tanners Creek Power Station IN MI Power Co - Tanners Creek Power Station KY Power Co - Big Sandy Power Station KY Power Co - Big Sandy Power Station OH Power Co - Mitchell Power Plant OH Power Co - Mitchell Power Plant

New Haven

WV

Significant

1980

2006

No

Yes

No

No

Yes

Yes

Yes 2/11/2009 2011

3/11/2009

No evaluate scour on eastern dike (from 2005 inspect), slippage at western No dike

No

29

508

35

No (5) remediate erosion, slippage on western dike (5) remediate foundations at overflows, address erosion

American Electric Power

New Haven

WV

High

1973

2002

Yes

No

No

No

Yes

Yes

Yes 10/1/2008 2009

3/11/2009

Yes

60

1965

65

No

American Electric Power American Electric Power American Electric Power

Bottom Ash Pond Bottom Ash Complex Fly Ash Reservoir 2

New Haven Brilliant Brilliant

WV OH OH

Significant Significant High

1974 1973 1987

2002

No No Yes

Yes Yes No

No No No

No No No

Yes No Yes

Yes No Yes

Yes 10/1/2008 2010 Yes 11/5/2008 2010 Yes 11/5/2008 2009 10/27/200 Yes 8 2010 10/25/200 Yes 7 2010 Yes 2/12/2009 2012 No Yes 9/15/2008 2009 Yes 9/15/2008 2010 10/23/200 Yes 8 2009 10/23/200 Yes 8 2011 Yes 2/24/2009 2011 Yes 2/24/2009 2010

3/11/2009 2/20/2009 2/20/2009

No remediate erosion on eastern dike No No

Yes No No

12 32 96

256 350 11350

42 22 237

No No spill - right abutment in Yes 2004

American Electric Power

Ash Pond Complex

Conesville

OH

Significant

1972

Yes

Yes

No Yes

No

No

12/22/2008

No

No

49

865

35

No

American Electric Power American Electric Power American Electric Power American Electric Power American Electric Power American Electric Power American Electric Power American Electric Power American Electric Power

Ash Pond Bottom Ash Complex Boiler Slag Pond (U-4) Fly Ash Pond Bottom Ash Complex Fly Ash Bottom Ash Complex Bottom Ash Complex Fly Ash Pond

Lockbourne Rockport Lawrenceburg Lawrenceburg Lawrenceburg Louisa Louisa Moundsville Moundsville

OH IN IN IN IN KY KY WV WV

Significant None None High Significant High Low Significant High

1954 1981

2008

Yes No No

Yes Yes No No Yes No Yes Yes No

No No No No Yes No No No No

No No No No No No No No No coal prep plant solids

No No No Yes No Yes No No Yes

No Yes No Yes No Yes No No Yes

2/9/2009

No No No

No No No No No No No No No

23 137 20 60 63 97 5 18 71

275 1640 820 1076 1645 8302 40 262 13500

24 24 0 60 52 152 16 30 355

No No No No No No No No No (5) seepage upper dike (5) plug a brand new spillway, install drain

1972 1953 1969 1969 1975 1971

2007 1973 1992

Yes Yes Yes No No

9/14/2006 9/14/2006 6/3/2008

No No No No

2/24/2009 10/17/2008

No No

2009

Yes

American Electric Power

OH Power Co - Muskingum Unit 5 Bottom Ash Pond (Lower River Power Station Fly Ash Pond) OH Power Co - Muskingum River Power Station Unit 1-4 Boiler Slag Pond OH Power Co - Muskingum River Power Station Upper Fly Ash Pond OH Power Co - Muskingum River Power Station OH Power Co -General James M. Gavin Power Station OH Power Co -General James M. Gavin Power Station OH Power Co -Kammer Power Plant OK Public Service Co Northeastern 3 & 4 Plant OK Public Service Co Oklaunion Power Station OK Public Service Co Oklaunion Power Station OK Public Service Co Oklaunion Power Station Southwestern Electric Power Co - Flint Creek Power Station Southwestern Electric Power Co - Pirkey Power Station Southwestern Electric Power Co - Pirkey Power Station Southwestern Electric Power Co - Pirkey Power Station Southwestern Electric Power Co - Pirkey Power Station Southwestern Electric Power Co - Pirkey Power Station Southwestern Electric Power Co - Pirkey Power Station Southwestern Electric Power Co - Welsh Plant Southwestern Electric Power Co - Welsh Plant Southwestern Electric Power Co - Welsh Plant Apache Station Combustion Waste Disposal Facility Apache Station Combustion Waste Disposal Facility Apache Station Combustion Waste Disposal Facility Apache Station Combustion Waste Disposal Facility

Waterford

OH

High

1968

1975

Yes

Yes

No

No

Yes

Yes

Yes 5/30/2008 2009

11/3/2008

No

No

18

660

75

No

American Electric Power

Waterford

OH

Low

1950's

No

No

Yes

No

No

No

Yes 5/30/2008 2011

11/3/2008

No

No

8

100

25

No

American Electric Power

Waterford

OH

High

1975

2005

Yes

No

No

No

Yes

Yes

Yes 5/30/2008 2009

10/21/1999

No

No

69

5250

158

No

American Electric Power

Middle Fly Ash Pond

Waterford

OH

High

1968

Yes

No

No

No

No

No

Yes 5/30/2008 2009 10/29/200 Yes 8 2009 10/29/200 Yes 8 No No 11/1/2008 Yes Yes Yes

11/3/2008

No

No

27

1370

100

No

American Electric Power

Bottom Ash Pond

Cheshire

OH

High

1974

No

Yes

No

No

No

No

8/20/2007

No

No

85

1530

36

No

American Electric Power American Electric Power American Electric Power American Electric Power American Electric Power American Electric Power

Fly Ash Pond Boiler Slag Pond Bottom Ash Pond Sludge Pond Pond #23 Pond #6

Cheshire Moundsville

OH WV OK

High None Low Low Low Low

1974

1987

Yes No

No No Yes No Yes Yes

No No No

No No No

Yes No No Yes Yes Yes

Yes No No Yes Yes Yes

8/20/2007

No No

No No No No No No

324 2 69 23 13 1

23365 22 700 565 332 1044

144 0 8 0 0 24

No No No No No No ash removed

1980 1986 1986 1986

1981

No No Yes Yes

2/27/2009

No No No No

Vernon Vernon Vernon

TX TX TX

No Yes No No

No Yes

American Electric Power

Primary Bottom Ash Pond

Gentry

AR

Low

1978

Yes

Yes

Yes

No

Yes

Yes

Yes 3/30/2009 2012

No

No

43

484

46

No

American Electric Power

West Bottom Ash Pond

Hallsville

TX

None

1985

No

Yes

No

No

Yes

Yes

Yes 3/19/2009 2012

1/13/2009

No

No

31

188

25

No

American Electric Power

Auxilliary Surge Pond

Hallsville

TX

None

1985

No

No

No Yes

Yes

Yes

Yes 3/19/2009

No

No

4

64

16

No

American Electric Power

East Bottom Ash Pond Scrubber Sludg Landfill Runoff Pond

Hallsville

TX

None

1985

No

Yes

No

No

Yes

Yes

Yes 3/19/2009 2012

1/13/2009

No

No

31

188

4

No

American Electric Power

Hallsville

TX

None

1993

No

No

No Yes

Yes

Yes

Yes 3/19/2009 2012

No

No

13

25

19

No

American Electric Power

Secondary Bottom Ash Pond

Hallsville

TX

None

1985

No

Yes

No

No

No

No

No

1/13/2009

No

No

3

12

0

No

American Electric Power American Electric Power American Electric Power American Electric Power Arizona Electric Pwr Coop Inc Arizona Electric Pwr Coop Inc Arizona Electric Pwr Coop Inc Arizona Electric Pwr Coop Inc

Surge Pond Primary Ash Pond Active Bottom Ash Storage Secondary Ash Pond

Hallsville

TX TX TX TX

None None None None

1985 1977 2000 1977

No Yes Yes Yes

No Yes Yes Yes

No Yes No No No No No No

Yes Yes Yes Yes

Yes Yes Yes Yes

Yes 3/19/2009 2012 Yes 3/18/2009 2012 Yes 3/18/2009 2012 Yes 3/18/2009 2012

3/19/2009 1/13/2009 1/13/2009 1/13/2009

No No No No

No No No No

5 98 20 4

19 307 270 37

0 20 35 20

No No No No

Ash Pond 4

Cochise

AZ

High

1995

Yes

Yes

No Yes

Yes

Yes

Yes 12/2008

12/1/2008

No

No

693

31

No

Coal Pile Retention Basin

Cochise

AZ

None

1978

No

No

No

No coal

Yes

Yes

No

No

No

0

No

Evaporation 1

Cochise

AZ

High

1995

Yes

Yes

No Yes

Yes

Yes

Yes 12/2008

12/1/2008

No

No

823

28

No

Cooling Tower Blowdown Pond

Cochise

AZ

None

1978

Yes

No

No

No

Yes

Yes

Yes

No

No

10

No

Company Arizona Electric Pwr Coop Inc Arizona Electric Pwr Coop Inc Arizona Electric Pwr Coop Inc Arizona Electric Pwr Coop Inc Arizona Electric Pwr Coop Inc Arizona Electric Pwr Coop Inc Arizona Public Service Co Arizona Public Service Co

Facility Apache Station Combustion Waste Disposal Facility Apache Station Combustion Waste Disposal Facility Apache Station Combustion Waste Disposal Facility Apache Station Combustion Waste Disposal Facility Apache Station Combustion Waste Disposal Facility Apache Station Combustion Waste Disposal Facility Cholla Power Station Cholla Power Station

Unit

City

State

1 Hazard Potential

2 Year Commissioned

3 3 2 3 Fly Bottom Boiler 3 Expansion(s) Ash Ash Slag FGD

3 Other Residuals

4 PE Design

5 Last 5 Next Company Company 6 Last 6 Next 7 Significant 4 PE 4 PE Assessm Assessm Regulatory Regulatory Deficiencies Constructed Monitored ent ent Inspection Inspection Identified

7 Significant Deficiencies

7 8 Surface 8 Storage 8 Unit 9 Corrective Area Capacity Height Historical Measures (acre) (acre ft) (ft) Releases

9 Historical Releases Identified

Additional Data

Ash Pond 1

Cochise

AZ

High

1995

Yes

Yes

No Yes

Yes

Yes

Yes 12/2008

12/1/2008

No

No

717

30

No

Low Volume Wastewater Pond

Cochise

AZ

None

2005

Yes

Yes

No Yes

Yes

Yes

Yes

No

No

20

30

6

No

Scrubber Pond 2

Cochise

AZ

High

1995

Yes

Yes

No Yes

Yes

Yes

Yes 12/2008

12/1/2008

No

No

446

15

No

(8) 0 stored in pond

Ash Pond 3

Cochise

AZ

High

1995

Yes

Yes

No Yes

Yes

Yes

Yes 12/2008

12/1/2008

No

No

720

30

No

Scrubber Pond 1

Cochise

AZ

High

1995

Yes

Yes

No Yes

Yes

Yes

Yes 12/2008

12/1/2008

No

No

314

10

No

Ash Pond 2 West Area Retention Pond Sedimentation Pond

Cochise Joseph City Joseph City

AZ AZ AZ

High None None

1995 2002 1976

Yes Yes Yes

Yes Yes Yes

No Yes Yes Yes Yes Yes other, cooling tower basin sludge, general water sump sediment, West Area Retention Pond sediment, area-wide drainage sump sediment, seepage intercept system sump Yes Yes sediment other, cooling tower basin sludge, general water sump sediment, West Area Retention Pond sediment, area-wide drainage sump sediment, seepage intercept system sump Yes Yes sediment No Yes other No Yes other No Yes other No Yes other Yes Yes No Yes Yes No No No No No

Yes Yes Yes

Yes Yes Yes

Yes 12/2008 No No

12/1/2008

No No No

No No No

720 0 0

5 11

30 0 0

No No No

Arizona Public Service Co

Cholla Power Station

Fly Ash Pond

Joseph City

AZ

High

1978

Yes

Yes

Yes

Yes

Yes 5/2008

9/1/2008

No

No

420

18000

80

No

Arizona Public Service Co Arizona Public Service Co Arizona Public Service Co Arizona Public Service Co Arizona Public Service Co Arizona Public Service Co Associated Electric Coop Inc Associated Electric Coop Inc Associated Electric Coop Inc Associated Electric Coop Inc Associated Electric Coop Inc Associated Electric Coop Inc Associated Electric Coop Inc Associated Electric Coop Inc Associated Electric Coop Inc Associated Electric Coop Inc Basin Electric Power Coop Basin Electric Power Coop Basin Electric Power Coop Basin Electric Power Coop Basin Electric Power Coop Basin Electric Power Coop Basin Electric Power Coop City of Independence City of Independence City of Independence City of Los Angeles City of Los Angeles City of Los Angeles City of Los Angeles City of Los Angeles City of Los Angeles City of Sikeston City of Sikeston City of Springfield City of Springfield Cleco Power LLC Cleco Power LLC Cleco Power LLC Cleco Power LLC Cleco Power LLC Cleco Power LLC Cleco Power LLC

Cholla Power Station Four Corners Power Station Four Corners Power Station Four Corners Power Station Four Corners Power Station Four Corners Power Station

Bottom Ash Pond Upper Retention Sump Low Volume Waste Water System Decant Cells Low Volume Waste Water Pond Lined Water Impoundment Lined Ash Impoundment

Joseph City Fruitland Fruitland Fruitland Fruitland Fruitland Marston Marston Marston Marston

AZ NM NM NM NM NM MO MO MO MO

High None None None Significant Significant None None None None

1978 1984 2004 1979 2003 2003 1994 1972 1984 1972

1991

Yes No Yes Yes No

Yes No Yes Yes No Yes No No No No

Yes No Yes No Yes Yes Yes Yes Yes Yes

Yes No Yes No Yes Yes Yes Yes Yes Yes

Yes 5/2008 No Yes No Yes 1/2009 No 1/2009 Yes 6/2009 Yes Yes Yes 6/2009 visual No inspection visual No inspection visual No inspection visual No inspection visual No inspection visual No inspection No No Yes 2008 Yes No No No No No No Yes Yes Yes Yes Yes Yes Yes Yes No 2008

9/1/2008

No No No No

No No No No No No No No No No

80 1 1 14 45 75 78 62 4 31

2300

73 0

No No No No No No No No No No (8) Height: below grade (8) Height: below grade

4 137 284 2399 1351 1137 14 570

6 0 90 83 20 20 20 12

10/1/2007 10/1/2007

No No No No No No

2007

Yes Yes No No Yes

New Madrid Power Station Ash Pond 2 New Madrid Power Station Slag Pond 1 New Madrid Power Station Slag Pond 2 New Madrid Power Station Ash Pond 1

Thomas Hill Energy Center Ash - 2 Landfill

Thomas Hill

MO

None

1998

Yes

Yes

Yes Yes

Yes

No

No

No

44

0

No

Thomas Hill Energy Center Ash Pond Slag Dewatering

Thomas Hill

MO

None

1984

No

Yes

Yes

No

Yes

No

No

No

3

0

No

Thomas Hill Energy Center Ash Pond Cell 3 - Lowest

Thomas Hill

MO

None

1980

No

No

No

No water only polishing

Yes

No

No

No

10

22

No

Thomas Hill Energy Center Ash Pond Cell 2 - Middle

Thomas Hill

MO

None

pre 1980

Yes

Yes

Yes

No

Yes

No

No

No

12

25

No

Thomas Hill Energy Center Ash Pond Cell 1 - Upper

Thomas Hill

MO

None

pre 1980

Yes

Yes

Yes Yes

Yes

No

No

No

7

32

No

Thomas Hill Energy Center Ash -3 Landfill Spray Drier Ash Water Make-Up Antelope Valley Station Pond Antelope Valley Station Decant Pond (Temporary Pond) Laramie River Power Station Bottom Ash Pond Laramie River Power Station Emergency Holding Pond Leland Olds Power Station Settling Pond #1 Leland Olds Power Station Settling Pond #2 Leland Olds Power Station Settling Pond #3 Blue Valley Power Station South Fly Ash Pond Blue Valley Power Station North Fly Ash Pond Blue Valley Power Station Bottom Ash Pond Intermountain Power Project Ash Water Recycle Intermountain Power Project Bottom Ash Basin Intermountain Power Project Evaporation Ponds (6 Ponds) Intermountain Power Project Land Fill Run-Off Intermountain Power Project Settling Basin Intermountain Power Project Wastewater Holding Basin Sikeston Power Station Bottom Ash Pond Sikeston Power Station Fly Ash Pond Dallman Power Station Dallman Ash Pond Lakeside Dolet Hills Power Station Dolet Hills Power Station Dolet Hills Power Station Dolet Hills Power Station Dolet Hills Power Station Dolet Hills Power Station Lakeside Ash Pond Surge Pond No. 2 Surge Pond Secondary Basin Auxiliary Surge Pond Ash Basin No. 2 Ash Basin No. 1

Thomas Hill Beulah Beulah Wheatland Wheatland Stanton Stanton Stanton Independence Independence Independence Delta Delta Delta Delta Delta Delta Sikeston Sikeston Springfield Springfield Mansfield Mansfield Mansfield Mansfield Mansfield Mansfield Lena

MO ND ND WY WY ND ND ND MO MO MO UT UT UT UT UT UT MO MO IL IL LA LA LA LA LA LA LA

None

2005 1995

No No No No No No No No Yes Yes No No No No No No No No Yes Yes 1988 Yes Yes Yes No Yes No No No

No No No Yes No Yes Yes Yes No No Yes No Yes No No No No Yes No Yes Yes No No Yes No Yes Yes Yes

No No No Yes

No no CCW No No No

Yes No No Yes Yes No No No Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes No No Yes Yes Yes Yes Yes Yes Yes

No No No Yes Yes No No No No No No Yes Yes Yes Yes Yes Yes Yes Yes No No Yes Yes Yes Yes Yes Yes Yes

No No No 12/1/2008 12/1/2008 No No No No No No No No No No No No No No No No No No No No No No No No No

No No No No No No No No No No No No No No No No No No No No No No No No No No No No

24 28 3

0 11 6 25 20 35 19 18 19 22 13 321 3000 3225 30 145 551 891 560 27 36 23 8 7 15 12 12 20 20 21 19 40 9 30 36 29

No No No No No No No No No No No No No No No No No No No No Seepage in the North Yes Embankment No No No No No No No

Low Low None None None None None None Low Low Low None Low Low None None None Low None None None None None None None

1980 1980 late 1960's 1975 1975 1978 1989 1978 1986 1986 1986 1986 1983 1986 1981 1981 1976 pre 1958 1986 1986 1986 1986 1986 1986 1982

No Yes No No No No No No No No No No No No Yes Yes No leachate from bottom ash No

27

No Yes No No only run-off

No Yes No Yes others No Yes No No Yes Yes Yes No No No No No No No Yes Yes Yes No Yes No No

1988 1988 1988 Spring 2008 Spring 2008 Spring 2008 Spring 2008 Spring 2008 Spring 2008

12/1/1988 12/1/1988 12/1/1988 4/1/2004 Spring 2009 4/1/2004 4/1/2004 4/1/2004 4/1/2004 4/1/2004

15 17 9 27 105 180 5 14 53 54 30 34 34 5 2 6 2 31 30 36

other, sluice water other, sluice water other, sluice water other, sluice water other, sluice water other, sluice water

No 2008 No No No No No No No 3/25/2009

12/1/2007 12/1/2007 12/1/2007 12/1/2007 12/1/2007 12/1/2007 10/24/2007

18 29 75 2 501 578 641

Rodemacher Power Station Bottom Ash Pond

No Other

Company Cleco Power LLC Coleto Creek Power, LP Coleto Creek Power, LP Consumers Energy Co Consumers Energy Co Consumers Energy Co Consumers Energy Co Consumers Energy Co Consumers Energy Co Consumers Energy Co Consumers Energy Co Dayton Power & Light Co Dayton Power & Light Co Dayton Power & Light Co Dayton Power & Light Co Dayton Power & Light Co Dayton Power & Light Co Dayton Power & Light Co Dayton Power & Light Co Dayton Power & Light Co Dayton Power & Light Co Dayton Power & Light Co Detroit Edison Co Detroit Edison Co Dominion Dominion Dominion Dominion Dominion Dominion Dominion Dominion Duke Energy Corp Duke Energy Corp Duke Energy Corp Duke Energy Corp Duke Energy Corp Duke Energy Corp Duke Energy Corp Duke Energy Corp Duke Energy Corp Duke Energy Corp Duke Energy Corp Duke Energy Corp Duke Energy Corp Duke Energy Corp Duke Energy Corp Duke Energy Corp Duke Energy Corp Duke Energy Corp Duke Energy Corp Duke Energy Corp Duke Energy Corp Duke Energy Corp Duke Energy Corp Duke Energy Corp Duke Energy Corp Duke Energy Corp Duke Energy Corp Duke Energy Corp Duke Energy Corp Duke Energy Corp Duke Energy Corp

Facility Rodemacher Power Station Coleto Creek Power Station Coleto Creek Power Station Dan E Karn Generating Plant Dan E Karn Generating Plant J C Weadock Generating Plant J C Weadock Generating Plant J. R. Whiting Power Station J. R. Whiting Power Station J. R. Whiting Power Station J. R. Whiting Power Station J. M. Stuart Power Station J. M. Stuart Power Station J. M. Stuart Power Station J. M. Stuart Power Station J. M. Stuart Power Station J. M. Stuart Power Station Killen Station Killen Station O.H. Hutchings Station O.H. Hutchings Station O.H. Hutchings Station Monroe Power Station Fly Ash Pond

Unit Lena Fannin Fannin

City

State LA TX TX MI MI MI MI MI MI MI MI OH OH OH OH OH OH OH OH OH OH OH MI MI VA VA VA VA VA VA VA VA

1 Hazard Potential None None None None None None None None None None Low Significant None None None None None Low Low None None None None None None None None None None None None None High High High High None None None None Low Low Low High High None None None None None High None None None None None None High Significant Significant None None High

2 Year Commissioned 1982 1980 1980 1959/1961 1959/1961 1958 1955 1952 1959 1952 1979 2001 +/-1981 +/-1977 +/-1977 +/-1975 +/-1977 1982 1982 1964 1964 1964 1975 early 1970's 1978-79 1983 1950's 1964 1983 1967 1989 1968 1974 1957 1982 1957 1970 1970 1970 2008

3 3 2 3 Fly Bottom Boiler 3 Expansion(s) Ash Ash Slag FGD Yes Yes Yes 1986 1973 No Yes Yes No 1983 1966, 1974 1983 No Yes Yes Yes Yes No Yes No No Yes Yes Yes Yes Yes Yes Yes No Yes Yes 1984 1967-68 Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes No Yes No Yes No No Yes Yes Yes No No Yes Yes No No No No No No No Yes No Yes Yes Yes Yes Yes No Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes No Yes No Yes No Yes No Yes Yes Yes No No No Yes Yes No Yes Yes Yes No No Yes Yes Yes Yes No Yes No Yes Yes No No No No No No No No No No No

3 Other Residuals

4 PE Design Yes Yes Yes No No No No No No No Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes No No Yes Yes Yes Yes Yes Yes Yes Yes No No No No No No No No No No Yes Yes Yes Yes Yes Yes Yes No No Yes Yes Yes No No Yes Yes Yes Yes Yes No

5 Last 5 Next Company Company 6 Last 6 Next 7 Significant 4 PE 4 PE Assessm Assessm Regulatory Regulatory Deficiencies Constructed Monitored ent ent Inspection Inspection Identified Yes Yes Yes No No No No No No No Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes No Yes Yes Yes Yes No Yes Yes Yes No No No No No No No No No No Yes Yes Yes Yes Yes Yes Yes No No Yes Yes Yes No No Yes Yes Yes No No No No 3/25/2009 Yes 1/2009 Yes 1/2009 No No No 2008 No 2008 No No 2/18/2005 No No Yes Yes Yes Yes Yes Yes Yes Yes No No No Yes Yes No Yes Yes Yes Yes Yes 3/17/2008 2009 2009 2009 2009 2009 2009 2/2009 2/2009 2009 2009 2009 visual daily visual daily 1/2009 10/2008 1/2009 1/2009 9/2008 1/23/2009 11/1/2008 11/1/2008 12/1/2008 12/1/2008 2/18/2009 2/18/2009 2/18/2009 2/18/2009 6/12/2008 10/24/2007 No No No No No No No No No No No No No No No No No No No No No No 01-May-09 No No No No No No No No No No 11/1/2008 2/1/2005 2/1/2005 2/1/2005 No No No No No No No No 1/13/2009 1/13/2009 1/13/2009 No No No No No 4/2009 4/2009 4/2009 3/24/2009 No No No No No 12/1/2007 No No No No No No No No mid 2009 2/9/2009 mid 2009 2/9/2009 No No No No 11/1/2004 No

7 Significant Deficiencies

7 8 Surface 8 Storage 8 Unit 9 Corrective Area Capacity Height Historical Measures (acre) (acre ft) (ft) Releases No No No No No No No No No No No No No No No No No No No No No No No No No No No No No No No No 14 174 156 136 8 82 7 32 29 3 37 37 34 50 191 39 0 4 7 410 100 17 96 10 49 112 178 120 32 109 670 23 34 39 15 20 15 40 19 18 19 27 23 42 42 42 42 28 39 39 18 18 18 41 4 17 102 15 19 44 35 140 40 CBI Claim CBI Claim CBI Claim CBI Claim CBI Claim CBI Claim CBI Claim CBI Claim CBI Claim CBI Claim CBI Claim CBI Claim CBI Claim CBI Claim CBI Claim CBI Claim CBI Claim CBI Claim CBI Claim CBI Claim CBI Claim CBI Claim CBI Claim CBI Claim CBI Claim CBI Claim CBI Claim CBI Claim CBI Claim CBI Claim CBI Claim No No No No No No No No No No No No No No No No No No No No No No No No No No

9 Historical Releases Identified

Additional Data

Primary Ash Pond Secondary Ash Pond Bottom Ash Pond Pond A West A - E Ponds East 7 & 8 Ponds Pond 1 Ponds 3-5 Pond 2 Pond 6 Pond #10 Pond #7A Pond #7 Pond #6 Pond #5 Pond #3A Fly Ash Pond Bottom Ash Pond Secondary Settling Pond East Primary Settling Pond West Primary Settling Pond Fly Ash Basin

Essexville Essexville Essexville Essexville Erie Erie Erie Erie Aberdeen Aberdeen Aberdeen Aberdeen Aberdeen Aberdeen Manchester Manchester Miamisburg Miamisburg Miamisburg Monroe Monroe Bremo Bluff Bremo Bluff Chesapeake Chester Chester

No other, process water No No No No No

No No No No No No polishing pond only No No No No runoff No Yes cooling tower No No No No other, plant waste water No No other, plant waste water No No No No No No No No Yes Yes No No No No

4/1/2008 4/1/2008

217 37 0 372 558 620 11004 1903 4

2/23/2009 2/23/2009

9917 310 290 4300 77 740 10240 2096 6400 600

Monroe Power Station Bottom Ash Basin Bremo Bluff Power Station West Ash Bremo Bluff Power Station North Ash Chesapeake Energy Center Bottom Ash/Sedimentation Pond Chesterfield Power Station Lower (Old) Ash Pond Chesterfield Power Station Upper (New) Ash Pond Kincaid Power Station Kincaid Slagfield Berm Possum Point Power Station Ash Pond D Possum Point Power Station Ash Pond E Belews Creek Steam Station Active Ash Pond Buck Power Station Buck Power Station Buck Power Station Cayuga Power Station Cayuga Power Station Cayuga Power Station Cayuga Power Station Cliffside Power Station Cliffside Power Station Cliffside Power Station Dan River Power Station Dan River Power Station East Bend Power Station East Bend Power Station East Bend Power Station Edwardsport Generating Station Edwardsport Generating Station G. G. Allen Power Station Primary Pond New Primary Pond Secondary Pond Secondary Ash Settling Basin Ash Disposal Area #1 Primary Ash Settling Basin

Yes No Yes No other Yes Yes Yes No holds waste water Yes No treatment waters Yes No

No Yes 2005 unusual discharge No No No No No No No No No No No No No No No No No No No No No No No No No No No No No No No No No No No

Yes 1/2009 Yes 1/2009 monthly No visual No 2/2005 No 2/2005 No 2/2005 No 1/2009 No 1/2009 No 1/2009 No 1/2009 Yes 9/2006 Yes 9/2006 Yes 9/2006 No 11/2006 No 11/2006 Yes 1/2009 Yes 1/2009 Yes 1/2009 No 1/2009 No 1/2009 No 12/2007 No Yes 10/2008 No 10/2008 No 10/2008 No No monthly Yes visual Yes 11/2008 Yes 11/2008 No 1/2009 No 1/2009 No 11/2004

Walnut Cove Spencer Spencer Spencer Cayuga Cayuga Cayuga

NC NC NC NC IN IN IN IN NC NC NC NC NC KY KY KY IN IN NC IN IN IN IN IN IN NC OH OH IN IN NC

Yes Yes other Yes Yes Yes Yes Yes Yes No Yes No Yes No Yes No No other No No other No No No other No

No CBI Claim CBI Claim No CBI Claim CBI Claim No CBI Claim CBI Claim No CBI Claim CBI Claim No CBI Claim CBI Claim No CBI Claim CBI Claim No CBI Claim CBI Claim No CBI Claim CBI Claim No CBI Claim CBI Claim No CBI Claim CBI Claim No CBI Claim CBI Claim No CBI Claim CBI Claim No CBI Claim CBI Claim No CBI Claim CBI Claim No CBI Claim CBI Claim No CBI Claim CBI Claim No CBI Claim CBI Claim No CBI Claim CBI Claim No CBI Claim CBI Claim No CBI Claim CBI Claim No CBI Claim CBI Claim No CBI Claim CBI Claim No CBI Claim CBI Claim No CBI Claim CBI Claim No CBI Claim CBI Claim No CBI Claim CBI Claim No CBI Claim CBI Claim No CBI Claim CBI Claim No CBI Claim CBI Claim No CBI Claim CBI Claim No CBI Claim CBI Claim

Lined Ash Disposal Pond - Cell #1 Cayuga Retired Unit 5 Basin Active Pond Retired Unit 1-4 Basin Primary Pond Secondary Pond Ash Pond FGD Pond East FGD Pond West Secondary Ash Pond Primary Ash Pond Active Ash Pond Mooresboro Mooresboro Mooresboro Eden Eden Rabbit Hash Rabbit Hash Rabbit Hash Edwardsport Edwardsport Belmont Owensville Owensville Owensville Owensville Owensville Owensville Terrell North Bend North Bend New Albany New Albany Mount Holly

1983

Yes No

1980 1980 1980 1980 1980 1975 1975 1973 1974 1991 1995 1999 1991 1974 1965 1985 1982

Yes Yes No No No No Yes Yes No Yes Yes Yes No No Yes Yes Yes

Yes Yes Yes Yes Yes No other

No Yes boiler cleaning chemicals No Yes boiler cleaning chemicals No Yes No other No other

Yes Yes No No

Gibson Generating Station North Settling Basin Gibson Generating Station East Ash Pond #1 Gibson Generating Station East Ash Pond #2 Gibson Generating Station East Ash Pond #3 Gibson Generating Station East Ash Pond Settling Basin Gibson Generating Station North Ash Pond Marshall Steam Station Miami Fort Generating Staion Miami Fort Generating Staion Active Ash Pond Ash Pond A Ash Pond B

Yes Yes Yes Yes Yes Yes No No No No

Yes Yes Yes Yes Yes Yes No Yes other, process run-off No Yes No other, process run-off No other, process waste water

R. Gallagher Power Station Ash Pond A R. Gallagher Power Station Secondary Ash Pond Riverbend Power Station Secondary Pond

1970 1970 1986

Yes Yes Yes

Company Duke Energy Corp Duke Energy Corp Duke Energy Corp Duke Energy Corp Duke Energy Corp Duke Energy Corp Duke Energy Corp

Facility Riverbend Power Station W. S. Lee Power Station W. S. Lee Power Station Wabash River Power Station Wabash River Power Station Wabash River Power Station Wabash River Power Station Primary Pond

Unit

City Mount Holly Pelzer Pelzer Terre Haute Terre Haute Terre Haute Terre Haute

State NC SC SC IN IN IN IN

1 Hazard Potential High None None None None None None

2 Year Commissioned 1957 1975 pre 1974 2005 1984 1984 1968

3 3 2 3 Fly Bottom Boiler 3 Expansion(s) Ash Ash Slag FGD 1979 Yes Yes 1975 Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes

3 Other Residuals

4 PE Design No Yes Yes No No No No

5 Last 5 Next Company Company 6 Last 6 Next 7 Significant 4 PE 4 PE Assessm Assessm Regulatory Regulatory Deficiencies Constructed Monitored ent ent Inspection Inspection Identified No Yes Yes No No No No No 11/2004 Yes 3/2009 Yes 3/2009 No 1/2009 No 1/2009 No 1/2009 No 1/2009 11/1/2004 No No No No No No No

7 Significant Deficiencies

No other, water treatment

Secondary Ash Pond Primary Active Ash Pond South Ash Pond Secondary Ash Pond Primary Ash Pond Cell B Primary Ash Pond Cell A

Yes Yes Yes Yes Yes Yes Yes Yes No No No No

7 8 Surface 8 Storage 8 Unit 9 Corrective Area Capacity Height Historical Measures (acre) (acre ft) (ft) Releases CBI No CBI Claim CBI Claim Claim No CBI No CBI Claim CBI Claim Claim No CBI No CBI Claim CBI Claim Claim No CBI No CBI Claim CBI Claim Claim No CBI No CBI Claim CBI Claim Claim No CBI No CBI Claim CBI Claim Claim No CBI No CBI Claim CBI Claim Claim No

9 Historical Releases Identified

Additional Data

Duke Energy Corp

Walter C. Beckjord Power Station

Ash Pond B

New Richmond

OH

Significant

1963

Yes

Yes

Yes

No other

Yes

Yes

Yes quarterly

4/23/2008

Duke Energy Corp Duke Energy Corp Dynegy Midwest Generation Inc Dynegy Midwest Generation Inc Dynegy Midwest Generation Inc Dynegy Midwest Generation Inc Dynegy Midwest Generation Inc Dynegy Midwest Generation Inc Dynegy Midwest Generation Inc Dynegy Midwest Generation Inc East Kentucky Power Coop Inc

Walter C. Beckjord Power Station Walter C. Beckjord Power Station Baldwin Energy Complex Havana Power Station Havana Power Station Hennepin Power Station Vermilion Power Station Vermilion Power Station

Ash Pond C Ash Pond C extension Ash Pond System East Ash Pond North Ash Pond System Ash Pond System (2 cells) North Ash Pond

New Richmond New Richmond Baldwin Havana Havana Hennepin Oakwood Oakwood Alton Alton Winchester

OH OH IL IL IL IL IL IL IL IL KY

Significant Significant None High None Low None Low Low High None

1966 1985 1970 1990 1947 1995 +/-1970's 1989 1977 2006 1954 1999 2003 2004 1989 1997, 2003

Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes

Yes No Yes Yes Yes Yes Yes Yes Yes Yes Yes

Yes No

No other No

Yes No Yes Yes No Yes No Yes Yes Yes No

Yes No Yes Yes No Yes No Yes Yes Yes No

visual Yes weekly No quarterly Yes 2/2009 Yes 3/2009 Yes 3/2009 Yes 3/2009 Yes 2/2009 No 2/2009 Yes 2009 Yes 2009 Yes 2010 2010 2010 2010 2010 2010 2010 2010

4/23/2008 4/23/2008

Ohio inspection noted: earth slides on east exterior slope, erosion gullies. Small slide on south Yes exterior slope Ohio inspection noted: earth slide on exterior slope of south and west embankment, earth slides on east Yes embankment, sinkhole Ohio inspection noted: gullies near Yes toe at west embankment No

CBI Yes CBI Claim CBI Claim Claim

No Apr 26, 1999 significant drop in pond elevation. Yes Holes No 55 40 22 34 40 40 20 33 20 No No No No No No No No No 2008 - small leak detected, taken off line, awaiting repairs to finish before Yes placed back on-line No No No (8) height for cell 1: 25', cell 2: 40', cell 3:38', cell 4: 40'

CBI Yes CBI Claim CBI Claim Claim CBI Yes CBI Claim CBI Claim Claim No No No No No No No No No 492 2625 6 20 80 28 19 38 8 3957 1388 5 562 2400 240 210 435 25

Yes Yes other waste waters Yes Yes Yes Yes Yes Yes Yes Yes No other No other No other No other No other No other No other No other

12/1/2003

No No No No No No

East Ash Pond (2 cells) West Ash Pond (2 cells) Cells 2E Wood River Power Station and 3 Wood River Power Station East Ash Pond (2 cells) Dale Power Station Dale Ash Pond #2

12/1/2006

No No

East Kentucky Power Coop Inc East Kentucky Power Coop Inc Empire District Electric Co Empire District Electric Co

Dale Power Station H. L. Spurlock Power Station Asbury Power Station Riverton Power Station

Dale Ash Pond #4 Spurlock Ash Pond Ash Impoundment Landfill Unit

Winchester Maysville Asbury Riverton

KY KY MO KS

Low Low None None

1977 1976 1970 1951

Yes No Yes Yes

Yes Yes No Yes

Yes No Yes No

No other No No No

Yes Yes No No

Yes Yes No No

Yes Yes No 4/1987 No 3/31/2009

12/1/1998 2/1/2009 2/1/2006 5/9/2008

No No No No recommend sub surface investigation and piezometer Yes installation, also install inclinometer No No No No No No CBI Claim CBI Claim CBI Claim CBI Claim CBI Claim CBI Claim CBI Claim CBI Claim CBI Claim CBI Claim CBI Claim

No No No No

11

112

26 40 26 19

1974, 1978 1985, 2000

92 28

806

First Energy Generation Corp First Energy Generation Corp First Energy Generation Corp First Energy Generation Corp First Light Power Resources First Light Power Resources First Light Power Resources Georgia Power Co Georgia Power Co Georgia Power Co Georgia Power Co Georgia Power Co Georgia Power Co Georgia Power Co Georgia Power Co Georgia Power Co Georgia Power Co Gulf Power Hoosier Energy R E C Inc Hoosier Energy R E C Inc Hoosier Energy R E C Inc Hoosier Energy R E C Inc

Bruce Mansfield Power Station Bruce Mansfield Power Station Bruce Mansfield Power Station Bruce Mansfield Power Station Mt. Tom Station Mt. Tom Station Mt. Tom Station Bowen Power Station Harllee Branch Power Station Harllee Branch Power Station Harllee Branch Power Station Harllee Branch Power Station Harllee Branch Power Station Kraft Power Station McIntosh Power Station Scherer Power Station Wansley Power Station Lansing Smith Power Station Frank E. Ratts Power Station Frank E. Ratts Power Station Frank E. Ratts Power Station Frank E. Ratts Power Station

Little Blue Run Dam North LDS Pond (N-LDS) West HDS Pond (W-HPDS) South LDS Pond (S-LDS) Bottom Ash Basin Equalization Tank Special Basin Ash Pond E D C B A Ash Pond Ash Pond Ash Pond Ash Pond Plant Smith Ash Pond Fly Ash Pond 1 Fly Ash Pond 2 Bottom Ash Pond Fly Ash Pond 3

Shippingport Shippingport Shippingport Shippingport Holyoke Holyoke Holyoke Cartersville Milledgeville Milledgeville Milledgeville Milledgeville Milledgeville Port Wentworth Rincon Juliette Carrolton Pensacola Petersburg Petersburg Petersburg Petersburg Sullivan Sullivan Madison

PA PA PA PA MA MA MA GA GA GA GA GA GA GA GA GA GA FL IN IN IN IN

High Significant Significant Significant None None None Low High Low None Low None None None None Low None None None None None

1975 1975 1975 1975 2003 1983 1983 1968 1982 1980 1971 1967 1965 1958 1982 1980 1975 1965 1975 1982 1970 1985

1996, 2006

Yes Yes Yes Yes No Yes Yes

Yes Yes Yes Yes Yes No No Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes No No Yes No

Yes Yes Yes Yes Yes Yes Yes Yes Yes No No No No No

Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes No No Yes Yes Yes No Yes Yes Yes Yes

Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes No No Yes Yes Yes No Yes Yes Yes Yes

Yes 10/2008 Yes 3/2009 Yes 3/2009 Yes 3/2009 No No No

1/1/2009 10/1/2007 10/1/2007 10/1/2007

CBI Yes CBI Claim CBI Claim Claim No No No No No 3 3 3 2 610 108000 7300 32 27 17 0 14

several seeps - state Yes documented No No No No No No 7/28/02 sink hole; 9/9/08 Yes Stack Failure. No No Yes discharge of slurry 12/1/00 No No No No No No No No No No No (2-10) No units handle wet ash Ash handled dry. All other units are wwt or stormwater in ground (8) Height: below grade (8) Height: below grade

1992, 2001

Yes Yes Yes Yes Yes Yes

Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes No Pyrites No Pyrites No Pyrites No Pyrites No Pyrites No Pyrites No Pyrites, other No Pyrites

Yes CBI Claim CBI Claim CBI Claim CBI Claim CBI Claim Yes CBI Claim CBI Claim CBI Claim CBI Claim CBI Claim Yes CBI Claim CBI Claim CBI Claim CBI Claim CBI Claim Yes CBI Claim CBI Claim CBI Claim CBI Claim CBI Claim Yes CBI Claim CBI Claim CBI Claim CBI Claim CBI Claim No CBI Claim CBI Claim CBI Claim CBI Claim CBI Claim No CBI Claim CBI Claim CBI Claim CBI Claim CBI Claim Yes CBI Claim CBI Claim CBI Claim CBI Claim CBI Claim Yes CBI Claim CBI Claim CBI Claim CBI Claim CBI Claim Yes CBI Claim CBI Claim CBI Claim CBI Claim CBI Claim No CBI Claim CBI Claim CBI Claim CBI Claim CBI Claim Yes quarterly Yes quarterly Yes quarterly Yes quarterly quarterly quarterly quarterly quarterly No No No No

1963

Yes Yes Yes

2006

Yes Yes Yes Yes Yes Yes

Yes Yes Pyrites Yes No No No No No Other No No No No

No 1 68000 0 CBI CBI Claim CBI Claim CBI Claim Claim CBI CBI Claim CBI Claim CBI Claim Claim CBI CBI Claim CBI Claim CBI Claim Claim CBI CBI Claim CBI Claim CBI Claim Claim CBI CBI Claim CBI Claim CBI Claim Claim CBI CBI Claim CBI Claim CBI Claim Claim CBI CBI Claim CBI Claim CBI Claim Claim CBI CBI Claim CBI Claim CBI Claim Claim CBI CBI Claim CBI Claim CBI Claim Claim CBI CBI Claim CBI Claim CBI Claim Claim CBI CBI Claim CBI Claim CBI Claim Claim No No No No 10 16 6 25 40 24 24 0 24

Hoosier Energy R E C Inc Indiana-Kentucky Electric Corp

Merom Generating Station All Clifty Creek Power Station West Boiler Slag Pond

IN IN

None Significant 1955

No No

No No

No Yes

No No

No No

No No

No Yes fall 2008 annual

No No 2 levee breaches (2/14/2007, 1/30/2008)- each releasing about 30 Yes million gallons of ash sluice water. 2 levee breaches (2/14/2007, 1/30/2008)- each releasing about 30 Yes million gallons of ash sluice water.

No No 58 3600

0 35

No No 2 levee breaches (2/14/2007, 1/30/2008)State notified. 30 million Yes gallons each spill. 2 levee breaches (2/14/2007, 1/30/2008)State notified. 30 million Yes gallons each spill.

Indianapolis Power & Light Eagle Valley Generating Co Station

C Pond

Martinsville

IN

None

1949

1979, 1981, 1991

Yes

Yes

Yes

No Other

No

No

No 4/7/2009

1/30/2008

No

8

22

16

Indianapolis Power & Light Eagle Valley Generating Co Station

B Pond

Martinsville

IN

None

1949

1979, 1981, 1991

Yes

Yes

Yes

No Other

No

No

No 4/7/2009

1/30/2008

No

13

72

16

Company

Facility

Unit

City

State

1 Hazard Potential

2 Year Commissioned

3 3 2 3 Fly Bottom Boiler 3 Expansion(s) Ash Ash Slag FGD 1962, 1981, 2000, 2005, 2007, 2008

3 Other Residuals

4 PE Design

5 Last 5 Next Company Company 6 Last 6 Next 7 Significant 4 PE 4 PE Assessm Assessm Regulatory Regulatory Deficiencies Constructed Monitored ent ent Inspection Inspection Identified

7 Significant Deficiencies

7 8 Surface 8 Storage 8 Unit 9 Corrective Area Capacity Height Historical Measures (acre) (acre ft) (ft) Releases

Indianapolis Power & Light Eagle Valley Generating Co Station

D Pond

Martinsville

IN

None

1956

Yes

Yes

Yes

No Other

No

No

No 4/7/2009

1/30/2008

2 levee breaches (2/14/2007, 1/30/2008)- each releasing about 30 Yes million gallons of ash sluice water. 2 levee breaches (2/14/2007, 1/30/2008)- each releasing about 30 Yes million gallons of ash sluice water. 2 levee breaches (2/14/2007, 1/30/2008)- each releasing about 30 Yes million gallons of ash sluice water. No No No No

No

16

160

38

Indianapolis Power & Light Eagle Valley Generating Co Station

E Pond

Martinsville

IN

None

1956

2003, 2007, 2008

Yes

Yes

Yes

No Other

No

No

No 4/7/2009

1/30/2008

No

4

2

28

Indianapolis Power & Light Co Indianapolis Power & Light Co Indianapolis Power & Light Co Indianapolis Power & Light Co Indianapolis Power & Light Co Indianapolis Power & Light Co Indianapolis Power & Light Co Indianapolis Power & Light Co Indianapolis Power & Light Co Indianapolis Power & Light Co Kansas City Board of Public Utilities Kansas City Power & Light Co Kansas City Power & Light Co Kansas City Power & Light Co Kansas City Power & Light Co Kansas City Power & Light Co Kansas City Power & Light Co Kansas City Power & Light Co Kansas City Power & Light Co Kansas City Power & Light Co

Eagle Valley Generating Station Harding Street Power Station Harding Street Power Station Harding Street Power Station Harding Street Power Station Harding Street Power Station Petersburg Generating Station Petersburg Generating Station Petersburg Generating Station Petersburg Generating Station Nearman Creek Power Station Hawthorn Generating Station Iatan Power Station LaCygne Generating Station LaCygne Generating Station Lake Road Generating Station Lake Road Generating Station Montrose Generating Station Sibley Generating Station Sibley Generating Station

A Pond Ponds 2A/2B Pond 3 Pond 4 Pond 1

Martinsville Indianapolis Indianapolis Indianapolis Indianapolis

IN IN IN IN IN

None None None None None

1949 1992 1977 1983 1958

1979, 1981, 1991

Yes Yes

Yes Yes Yes Yes Yes

Yes

No Other

No Yes No No No

No Yes No No No

No 4/7/2009 Yes 6/2008 No 6/2008 No 6/2008 No 6/2008

1/30/2008

No No No No No

19 4 8 26 7

388

26 18 5 13 18

9 Historical Releases Identified 2 levee breaches (2/14/2007, 1/30/2008)State notified. 30 million Yes gallons each spill. 2 levee breaches (2/14/2007, 1/30/2008)State notified. 30 million Yes gallons each spill. 2 levee breaches (2/14/2007, 1/30/2008)State notified. 30 million Yes gallons each spill. No No No No

Additional Data

Yes Yes Yes Yes Yes Yes Yes Yes

1995, 1998 1995, 1998 1995, 1998 1980 , 1992, 1995, 1998, 2001, 2006 1999 1978 1978 1999

Yes Yes Yes

Pond 2 Pond C Pond A - Active Pond A - Discharge Pond B N/A Scrubber Waste Settling Pond Ash Pond

Indianapolis Petersburg Petersburg Petersburg Petersburg Kansas City Kansas City Weston

IN IN IN IN IN KS MO MO

None None None None None None None None

1968 1986 1967 1967 1986 1980 2006 1980

Yes Yes Yes Yes Yes No No Yes

Yes Yes Yes Yes Yes Yes No Yes

Yes Yes Yes Yes Other Yes Yes Other Yes Yes Other Yes Yes Other Yes No

No Yes Yes Yes Yes Yes No No

No Yes Yes Yes Yes Yes No No

No 6/2008 No 6/26/2008 No 6/26/2008 No 6/26/2008 No 6/26/2008 No 6/2008 No visual No weekly Spring Yes 2009 No No No No No No 08/18/2008

No No No No No No No No

No No No No No No No No

30 30 67 5 35 7 0 89 1023 310 12 1209 124 0 2479

48 37 20 20 37 21 0 0

No No No No No No No No July 2007, Sept 2007, and May 2009- Due to unusual Yes rainfall events No No No No No No (5) minor leaks at spillwy, minor seep, repair erosion gullies (4) No/No/No for 1957 and 1964; yes/yes/no for 1973 and 1990 (5) repair erosion gullies (5) evaluate wave erosion at toe (NE corner); (6) no toe drain noted (8) Height: below grade (5) repair scarp, stabalize soft spots (8) Height: below grade 8- Height incised unit (2) permitted 1982 8- height unit is incised

No Yes No No

Scrubber Sludge Ponds Bottom Ash Settling Pond Slag Settling Pond Settling Pond Ash Settling Pond Slag Settling Pond Fly Ash Settling Pond

LaCygne LaCygne St. Joseph St. Joseph Clinton Sibley Sibley

KS KS MO MO MO MO MO

None None None None None None None

1971 1977 1967 1967 1958 1986 1979

1979

Yes No

No Yes No No Yes No No

No Yes No Yes No No No No No No No Other No No Other No

Yes No Yes Yes No Yes Yes

Yes No Yes Yes No Yes Yes

No No No No No No No

No No No No No No No

483 2 1 1 4 1 15

6818 1 4 3 5 0 136

45 12 10 10 6 0 18

1977 1977

No Yes Yes No Yes

Kentucky Utilities Co

E. W. Brown Power Station Auxiliary Pond

Harrodsburg

KY

High

2008 1964, 1973, 1990 2003

Yes

Yes

Yes

No other, process water

Yes

Yes

No 1/2009

6/1/2008

No

No

35

47

75

No

Kentucky Utilities Co Kentucky Utilities Co

E. W. Brown Power Station Ash Pond Ghent Power Station Ash Pond Basin 2

Harrodsburg Ghent

KY KY

High High

1957 1995

Yes Yes

Yes Yes

Yes Yes

No other, process water No other

No Yes

No No

No 1/2009 No 1/2009

7/1/2008 3/1/2009

No No

No No

126 146

4649

126 227

No No

Kentucky Utilities Co Kentucky Utilities Co Kentucky Utilities Co Kentucky Utilities Co Kentucky Utilities Co Kentucky Utilities Co Kentucky Utilities Co Kentucky Utilities Co Kentucky Utilities Co Kentucky Utilities Co

Ghent Power Station Ghent Power Station Ghent Power Station

Ash Pond Basin 1 Secondary Ash Treatment Basin

Ghent Ghent Ghent Ghent Central City Central City Central City Central City Central City

KY KY KY KY KY KY KY KY KY KY

High None High None None None None Low Low None

1972 1972 1995 1995 1949 1949 1949 1977 1975 1977

1977

Yes Yes No No Yes Yes Yes Yes No Yes

Yes Yes No No Yes Yes Yes Yes No Yes

Yes No

No other No

Yes Yes Yes Yes No No No Yes No No

No No No Yes No No No No No No

No 1/2009 No 3/2009 No 1/2009 No No No No 3/2009 1/2009 1/2009 1/2009

3/1/2009

No No No No No No No

No No No No No No No No No No

120 4 46 8 23 2 6 37 12 7

4339 0 589 0

52 0 25 0 17 17 17 54 20 17

No No No No No No No No No No

Gypsum Stacking Facility Gypsum Stack Surge/Reclaim Ghent Power Station Pond Green River Power Station Ash Pond Number 2 Green River Power Station Finishing Pond Number 3 Green River Power Station Former Ash Pond Green River Power Station Main Ash Pond Green River Power Station Scrubber Pond Pineville Station Ash Pond

No Yes No Yes Yes No other No No Yes No other, process water Yes No other

3/1/2009

No 2/2009 No 2/2009 No 1/2009

11/1/2004 11/1/2004

No No No

682 150

No Yes No No other, process water

(5) need to evaluate need for headwall or inlet protection (5) need to evaluate need for overflow protection (5) evaluate seepage and bank erosion, monitor seepage and check for soil fines in flow (5) evaluate seepage and bank erosion, soil fines in flow

Kentucky Utilities Co Kentucky Utilities Co Lansing Board of Water & Light Louisiana Generating LLC Louisiana Generating LLC Louisiana Generating LLC Louisville Gas & Electric Co Louisville Gas & Electric Co Louisville Gas & Electric Co Louisville Gas & Electric Co Louisville Gas & Electric Co Louisville Gas & Electric Co Louisville Gas & Electric Co Louisville Gas & Electric Co Louisville Gas & Electric Co Louisville Gas & Electric Co

Tyrone Power Station Tyrone Power Station Erickson Station Power Station

Finishing Pond Ash Pond Unit 1

Versailles Versailles Lansing New Roads New Roads New Roads Louisville Louisville Louisville Louisville Louisville Louisville

KY KY MI LA LA LA KY KY KY KY KY KY

None Low None None None None High None None None None None

est 1977 1977 1973 1979 1980 1980 1972 1976 1976 1976 1977 1978 1982 1982 1977

Yes Yes Yes No Yes No Yes No No No No No

Yes Yes Yes No Yes Yes Yes No No No No No

No Yes No No No No Yes

No No other, process water No other, waste water solids, No ash sluice water No other, waste water other, settled solids from No clarifying river water

No Yes Yes Yes Yes Yes No No No No No No

No No Yes Yes Yes Yes No No No No No No

No 2/2009 No 2/2009 No 1973 No No No No 1/2009 No 3/2009 No 3/2009 No 3/2009 No 3/2009 No 3/2009

6/1/2005 6/1/2005

No No No

No No No No No No No No No No No No

0 13 33 25 175 66 40 2 0 4 2 2 0 99 457 732 554 821

15 16 17 18 10 18 12 10 10 10 12 0

No No No No No No No No No No No No

Big Cajun 2 Power Station Water Treatment Unit Big Cajun 2 Power Station Fly Ash Unit Big Cajun 2 Power Station Bottom Ash Unit Cane Run Power Station Cane Run Power Station Cane Run Power Station Cane Run Power Station Cane Run Power Station Mill Creek Power Station Ash Pond Basin Pond Clearwell Pond Dead Storage Pond Emergency Pond Dead Storage Pond

9/1/2006 9/1/2006 9/1/2006 10/1/2008

No No No No No No No No No

No other other, process water No Yes drainage

No Yes No Yes other, process water No Yes drainage No Yes

Mill Creek Power Station Mill Creek Power Station Mill Creek Power Station Mill Creek Power Station

Ash Pond Construction Run Off Pond Emergency Pond Clearwell Pond

Louisville Louisville Louisville Louisville

KY KY KY KY

Significant None None None

1972 1978 1977 1978

1978

Yes No No No

Yes No No No

Yes Yes other, process water No Yes No Yes No Yes

No No No No

No No No No

No 1/2009 No 3/2009 No 3/2009 No 3/2009

10/1/2008

No No No No

No No No No

43 2 0 2 0 0 0

77 0 0 0

No No No No

(8) Height: below grade (5) major structural integrity issues, water seepage, erosion issues (8) Height: below grade (8) Height: below grade (8) Height: below grade

Company

Facility

Unit

City

State

1 Hazard Potential

2 Year Commissioned

3 3 2 3 Fly Bottom Boiler 3 Expansion(s) Ash Ash Slag FGD

3 Other Residuals

4 PE Design

5 Last 5 Next Company Company 6 Last 6 Next 7 Significant 4 PE 4 PE Assessm Assessm Regulatory Regulatory Deficiencies Constructed Monitored ent ent Inspection Inspection Identified

7 Significant Deficiencies

7 8 Surface 8 Storage 8 Unit 9 Corrective Area Capacity Height Historical Measures (acre) (acre ft) (ft) Releases

9 Historical Releases Identified

Additional Data (5) trees grown on north downstream slope, repair erosion gullies, wave erosion repair

Louisville Gas & Electric Co Lower Colorado River Authority MidAmerican Energy Co MidAmerican Energy Co MidAmerican Energy Co MidAmerican Energy Co MidAmerican Energy Co

Trimble County Power Station Fayette Power Project Power Station George Neal North Power Station George Neal North Power Station George Neal North Power Station Louisa Power Station Riverside Generating Station Riverside Generating Station Walter Scott Junior Energy Center Walter Scott Junior Energy Center Milton R. Young Power Station Milton R. Young Power Station Milton R. Young Power Station Plant Jack Watson R. M. Schahfer Power Station R. M. Schahfer Power Station R. M. Schahfer Power Station R. M. Schahfer Power Station R. M. Schahfer Power Station R. M. Schahfer Power Station R. M. Schahfer Power Station Black Dog Power Station Riverside Power Station Sherburne County Power Station Sherburne County Power Station Sherburne County Power Station Dunkirk Electric Generating Station Dunkirk Electric Generating Station Dunkirk Electric Generating Station

Ash Pond Management Unit 002 Surface Impoundment 1 Surface Impoundment 2 Surface Impoundment 3 Louisa Surface Impoundment North Surface Impoundment

Bedford La Grange Sioux City Sioux City Sioux City Muscatine Bettendorf

KY TX IA IA IA IA IA

Significant None None None None None None

1990 1979 1972 1972 1975 1983 1979 1994

Yes Yes Yes Yes Yes Yes Yes

Yes Yes Yes Yes Yes Yes Yes

Yes Yes other, process water Yes No other liquids

Yes Yes No No No No No

Yes Yes No No No No No

No 1/1/2009 Yes monthly No No No No No

9/1/2005 1/30/2009

No No No No No No No

No No No No No No No

82 83 12 27 76 42 14

3223 1859 82 178 335

40 57 12 11 20 4 10

No No No No No No No April 14, 2002- Caused by Mississippi River flooding, Yes fixed using drilled grout No No No No No No No No 2 spills: pump failure March 2009; no details Yes March 1998 No No No No No No No Yes 600 Gal spill May 2007 No No No No No No No No No No No No No No No No No No No No No No No No No No No No No

Yes Yes other Yes Yes other Yes Yes other Yes Yes Yes Yes Other

50

MidAmerican Energy Co MidAmerican Energy Co MidAmerican Energy Co Minnkota Power Coop Inc Minnkota Power Coop Inc Minnkota Power Coop Inc Mississippi Power Co Northern Indiana Pub Serv Co Northern Indiana Pub Serv Co Northern Indiana Pub Serv Co Northern Indiana Pub Serv Co Northern Indiana Pub Serv Co Northern Indiana Pub Serv Co Northern Indiana Pub Serv Co Northern States Power Co Northern States Power Co Northern States Power Co Northern States Power Co Northern States Power Co NRG Dunkirk NRG Dunkirk

South Surface Impoundment North Surface Impoundment South Surface Impoundment Unit 1 Alternative Bottom Ash Pond Horseshoe Pit Evaporation Pond 30 Year Ponds (Cell 2) Ash Pond Recycle Basin Waste Disposal Area

Bettendorf

IA IA IA

None None None None None None None None None

1967 1978 1979 1986 1990 2005 1968 1982 1982

1970, 1976

Yes Yes No No No

Yes Yes Yes Yes No No Yes No Yes

Yes Yes Other Yes Yes No No No No Process Water No No only leachate

No No No Yes Yes Yes No No No

No No No Yes Yes Yes No No No

No No No Yes daily Yes monthly 2007/200 Yes 8 7/11/2008 2/1/2008 2/1/2008

No No No No No No CBI Claim

No No No No No

12 171 133 2 4

109 2045 1326 2 34

10 11 7 10 6

Center Center Center Gulfport Wheatfield Wheatfield

ND ND ND MS IN IN

2007 1974, 1999

Yes Yes No No

Yes Yes Yes No Yes No No other No

No CBI Claim CBI Claim CBI Claim CBI Claim CBI Claim No No No No

No 27 620 60 CBI CBI Claim CBI Claim CBI Claim Claim No No 30 76 17 17

Metal Cleaning Waste Basin Material Storage Runoff Basin Final Settling Basin FGD Landfill Stormwater Runoff Pond Yard Drain Stormwater Retention Pond Settling Pond 1 Triangle Pond Pond No. 1 Pond No. 2 Pond No. 3 Northwest Pump House Settling Pond System

Wheatfield Wheatfield Wheatfield Wheatfield Wheatfield Burnsville Minneapolis Becker Becker Becker Dunkirk Dunkirk Dunkirk Dover Tonawanda Tonawanda Tonawanda Millsboro Millsboro Somerset Somerset Somerset Somerset Jewett Jewett Jewett Thompsons Thompsons Thompsons Thompsons Thompsons Thompsons Thompsons Thompsons Cheshire Cheshire Casper Casper

IN IN IN IN IN MN MN MN MN MN NY NY NY DE NY NY NY DE DE MA MA MA MA TX TX TX TX TX TX TX TX TX TX TX OH OH WY WY

None None None None None None None Low Significant Significant None None None None None None None None None None None None None None None None None None None None None None None None Significant Significant None None

1982 1982 1976 1983 1999 1955 1978 1975 1984 1975 1986 Unknown 1986 1984 1983 1983 unknown 1989 1979 1923 - 1925 1982 - 1984 1982 - 1984 1970's 1985 1985 1985 1978 1978 1978 1980 1978 1978 1978 1978 1955 1955 1972 1972 1993 1982 - 1984 1982 - 1984 1976 1987 1986, 2004, 2008

No No No No No Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes No No No No No No No No Yes Yes Yes No Yes Yes Yes Yes Yes No Yes Yes

No No No No No Yes Yes Yes Yes Yes No Yes No Yes No No Yes Yes Yes Yes Yes Yes Yes No No Yes Yes Yes Yes No Yes Yes Yes Yes No No Yes Yes

No Yes No Yes No No No No No No other No other No other No No

No No No No No No Yes Yes Yes Yes Yes Yes Yes No Yes Yes Yes No No No Yes Yes No Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes No No Yes Yes

No No No No No No Yes Yes Yes Yes Yes Yes Yes No No No No No No No Yes Yes No Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes No No No No

No No No No No No 1997 Yes Yes 1975 Yes 1984 Yes No No No Yes No No No 4/2009 No No No 1984 No 1984 No 1984 No No No No No No No No No No No No inspected weekly inspected weekly inspected weekly inspected weekly inspected weekly inspected weekly inspected weekly inspected weekly 2/1/2009 2/1/2009 2/12/2009 2/12/2009 2/12/2009 6/1/2008 6/1/2008 6/1/2008 03/25/2009 03/25/2009 03/25/2009

No No No No No No No No No No No No No No No No No No No No No No No No No No No No No No No No No No No No No No

No No No No No No No No No No No No No No No No No No No No No No No No No No No No No No No No No No No No No No

12 12 214 4 1 0 62 100 50 0 2 0 0 2 2 7 0 0 0 0 0 0 1 1 3 0 1 0 0 0 0 24 0 65 35 20 20 14 138 0 0 0 2 0 0 0 2 0 2 0 0 0 0 24 0 0 12 0 0 9 48 8

4 4 13 3 0 13 20 41 57 57 0 5 0 6 3 5 7 2 4 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 40 41 12 12

1975

(8) 0.26 acres

Yes Yes Yes Yes Yes Yes No No No Yes No No Yes No No No No No No No No No No No No No Other No No Other No Other No Other No Other No No No No Other No No Other No No Other No Other No Other No No No

8- Height below grade

NRG Dunkirk Equalization Basin NRG Energy Center Dover, LLC NRG - Energy Center Dover Waste Water Pond Huntley Elecrtic Generating North Equalization Basin NRG Huntley Power, LLC Station Huntley Elecrtic Generating NRG Huntley Power, LLC Station South Equalization Basin Huntley Elecrtic Generating NRG Huntley Power, LLC Station South Settling Pond System NRG Indian River Power Indian River Electric LLC Generating Station Sedimentation Pond NRG Indian River Power Indian River Electric LLC Generating Station Ash Silo Area Sump System Somerset Electric NRG Somerset Power LLC Generating Station Equalization Basin Somerset Electric NRG Somerset Power LLC Generating Station Coal Pile Run-Off Sump Somerset Electric NRG Somerset Power LLC Generating Station South Pond Somerset Electric NRG Somerset Power LLC Generating Station North Lift Pit Limestone Electric NRG Texas Power, LLC Generating Station Stormwater Pond A Limestone Electric NRG Texas Power, LLC Generating Station Stormwater Pond B Limestone Electric NRG Texas Power, LLC Generating Station Bottom Ash Cooling Pond W. A. Parish Electric NRG Texas Power, LLC Generating Station Unit 7/8 Dewatering Bin Basin W. A. Parish Electric NRG Texas Power, LLC Generating Station Air Preheater Pond W. A. Parish Electric NRG Texas Power, LLC Generating Station Unit 8 Bottom Ash Overflow Basin W. A. Parish Electric Flue Gas Desulfurization NRG Texas Power, LLC Generating Station Emergency Pond (E-Pond) W. A. Parish Electric NRG Texas Power, LLC Generating Station Unit 7 Bottom Ash Overflow Basin W. A. Parish Electric NRG Texas Power, LLC Generating Station Unit 5 Bottom Ash Overflow Basin W. A. Parish Electric NRG Texas Power, LLC Generating Station Coal Pile Run Off Pond W. A. Parish Electric NRG Texas Power, LLC Generating Station Unit 6 Bottom Ash Overflow Basin Ohio Valley Electric Corp Ohio Valley Electric Corp PacifiCorp PacifiCorp Kyger Creek Power Station South Fly Ash Pond Kyger Creek Power Station Boiler Slag Pond Dave Johnston Power Station 4B Ash Pond Dave Johnston Power Station 4A Ash Pond

8- Height below grade

8-Height incised 8-Height below grade 8-Height below grade 8-Height incised 8- Height Below Grade 8- Height Below Grade 8- Height Below Grade 8- Height Below Grade 8- Height Below Grade 8- Height Below Grade 8- Height Below Grade 8- Height Below Grade 8- Height Below Grade 8- Height Below Grade 8- Height Below Grade

No Yes No No No No No Yes No No No No No No

No fall 2007 No fall 2007 No 3/2009 No 3/2009

Yes Yes Yes Yes

Company PacifiCorp PacifiCorp PacifiCorp PacifiCorp PacifiCorp

Facility Dave Johnston Power Station Dave Johnston Power Station Dave Johnston Power Station Dave Johnston Power Station Dave Johnston Power Station Dave Johnston Power Station Jim Bridger Power Station

Unit 4 Clear Pond 1B Clear Pond 1B Ash Pond 1A Clear Pond 1A Ash Pond Casper Casper Casper Casper Casper

City

State WY WY WY WY WY

1 Hazard Potential None None None None None

2 Year Commissioned 1972 1959 1959 1959 1959

3 3 2 3 Fly Bottom Boiler 3 Expansion(s) Ash Ash Slag FGD Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes

3 Other Residuals

4 PE Design Yes Yes Yes Yes Yes

5 Last 5 Next Company Company 6 Last 6 Next 7 Significant 4 PE 4 PE Assessm Assessm Regulatory Regulatory Deficiencies Constructed Monitored ent ent Inspection Inspection Identified No No No No No No 3/2009 No 3/2009 No 3/2009 No 3/2009 No 3/2009 No No No No No

7 Significant Deficiencies

7 8 Surface 8 Storage 8 Unit 9 Corrective Area Capacity Height Historical Measures (acre) (acre ft) (ft) Releases No No No No No 6 2 12 2 13 15 2 56 2 57 12 0 0 0 0 No No No No

9 Historical Releases Identified

Additional Data

Yes Yes other Yes Yes other Yes Yes other Yes Yes other

(8) Height: 0 Feet (sub surface) (8) Height: 0 Feet (sub surface)

PacifiCorp PacifiCorp

Blowdown Canal FGD Pond #1

Casper Rock Springs

WY WY

None Significant

1972 1979 1989

Yes Yes

Yes Yes

Yes Yes No Yes

Yes Yes

No No

No 3/2009 No 2/2009 6/1/2004

No No

No No

0 93

1 1340

0 32

PacifiCorp

Jim Bridger Power Station

FGD Pond #2

Rock Springs

WY

Significant

1990

Yes

No

No Yes

Yes

Yes

No 2/2009

6/1/2004

No

No

392

11534

42

No Jan 2009 - 14,400 gallons of process water overflowed Yes the canal Seepage on south side of Yes pond Seepage on north side estimated at 10,000 gal/month and is pumped Yes back into the pond 2006 - leakage from pond Yes install a pump back system 55,000 cu. Yds of fly ash was spilled outside the Yes pond boundries

PacifiCorp

Naughton Power Station

FGD Pond #2

Kemmerer

WY

Significant

1999 1982, 1987 and 19931994 1986, 1990, 1994 and 2005 1976, 1981, 1987 and 1993-1994

Yes

No

No Yes other

Yes

Yes

No 2/2009

9/1/2008

No

No

40

382

25

PacifiCorp

Naughton Power Station

North Ash Pond

Kemmerer

WY

Low

1973

Yes

Yes

Yes

No other

No

No

No 2/2009

8/1/2004

No

No

152

2100

61

PacifiCorp

Naughton Power Station

FGD Pond #1

Kemmerer

WY

Low

1981

Yes

No

No Yes other

No

No

No 2/2009

No

No

40

864

70

No

PacifiCorp PacifiCorp Platte River Power Authority Platte River Power Authority Power South Energy Cooperative Power South Energy Cooperative Power South Energy Cooperative PPL Generation, LLC PPL Generation, LLC PPL Generation, LLC PPL Generation, LLC PPL Generation, LLC

Naughton Power Station Wyodak Power Station Rawhide Power Station Rawhide Power Station Charles R. Lowman Power Station Charles R. Lowman Power Station Charles R. Lowman Power Station PPL Brunner Island Power Station PPL Brunner Island Power Station PPL Brunner Island Power Station PPL Holtwood Power Station PPL Martins Creek Power Station PPL Martins Creek Power Station PPL Montour Power Station PPL Montour Power Station

South Ash Pond Ash Pond North Bottom Ash Transfer Pond South Bottom Ash Transfer Pond Units 2-3 Pond FGD Unit 1 Ash Pond

Kemmerer Gillette Wellington Wellington Leroy Leroy Leroy

WY WY CO CO AL AL AL PA PA PA PA PA

Low None None None None None None None None Less than Low

1973 1976 1984 1984 1979 1979 1969 1973 1993 1981

Yes Yes No No Yes No

Yes Yes Yes Yes Yes No Yes No No Yes No No

No No other Yes Yes Yes Yes Yes No other No other No

No Yes Yes Yes Yes Yes No Yes Yes Yes No Yes

No Yes Yes Yes Yes Yes No Yes Yes Yes No Yes

No 2/2009 No 4/2006 Yes Yes No No No Yes 2008 Yes 2008 Yes 2008 No Yes

8/1/2004 10/1/2006

No No No No No No No No No

No No No No No No No No No No No No

183 16 4 4 29 530 16 7 1 70

3754 238 0 12 629

71 0 0 0 12 12

No No No No No No No No No No No No Plant closed and demolished 1999 Sep 2007 - Plant was shut down (8) Height: below grade (8) Height: below grade

No Yes Yes No No No No No No No other No No No No other

1968

Yes No Yes Yes No

330

14 3 11 39 45

Industrial Waste Treatment Basin York Haven Equalization Pond Ash Basin No.6 York Haven York Haven Holtwood Industrial Waste Treatment Basin Bangor

1/1/2009

No No No

Less than Low

1974

No

15

10

PPL Generation, LLC PPL Generation, LLC PPL Generation, LLC

Ash Basin 4 Detention Basin

Bangor Washingtonville

PA PA PA

Ash Area 3 Leachate Runoff Basin Washingtonville

Significant Less than Low Less than Low

1989 1968 1980

Yes No No

No No No

No No No

No No other No other

Yes Yes Yes

Yes Yes Yes

Yes 2008 Yes 2007 Yes

1/1/2009

No No No

No No No

37 21 2 53 2

43 8 10

2005 - Fly Ash spill (100 Million Gal) estimated 10 Yes acres Sep 2007 - Plant was shut down minor seepage of west side Yes berm 2004 No minor seeps on the south side basin - abatement action underway of a Yes consent order 2007 No No No Yes 3/18/03 spill +/- 2700 No No (8) 0.11 acres, 0.5 acft

PPL Generation, LLC PPL Generation, LLC PPL Generation, LLC PPL Montana LLC PPL Montana LLC PPL Montana LLC PPL Montana LLC

PPL Montour Power Station PPL Montour Power Station PPL Montour Power Station Colstrip Steam Electric Station Colstrip Steam Electric Station Colstrip Steam Electric Station Colstrip Steam Electric Station Colstrip Steam Electric Station

Ash Basin No. 1 Silo Runoff Pond Stormwater Basin Units 3 & 4 Scrubber Drain Collection Pond Units 1 & 2 A Pond Units 1 & 2 B Fly Ash Pond Units 1 & 2 Bottom Ash Pond

Washingtonville Washingtonville Washingtonville Colstrip Colstrip Colstrip Colstrip

PA PA PA MT MT MT MT

Low Less than Low Less than Low Less than Low Significant Less than Low Significant

1968 1980 1968 1983 1975 1975 1988 2004

Yes Yes No Yes Yes Yes No

Yes No No No No No Yes

No No No

No No No other

Yes Yes Yes Yes Yes Yes Yes

Yes Yes Yes Yes Yes Yes Yes

Yes 2007 Yes Yes No Yes Yes Yes 2009 2009

1/1/2009

No No No No No No No

No No No No No No No

143 0 2 6 14 10 7 0 13 72 245 196 73

40 6 7 0 25 25 25

No Yes No Yes now only stormwater runoff No Yes Yes No temp storage other - only stores raw water and storm water No runoff from

PPL Montana LLC

Units 1 & 2 C Pond

Colstrip

MT

Low

1978

1987

No

No

No

Yes

Yes

Yes

2009

No

No

20

400

14

No 10/11/95 small spill +/- 100 gallons C Cell; 8/29/00 small spill +/- 50 gallons C Cell; 2/1/06 hole in HDPE liner C Cell +/- 2000 Yes gallons 12/21/99 spill; 9/28/04; 1/25/05 ground and shows Yes up on hillside No No No No No No No No No No No (2) removed from service 1995

PPL Montana LLC

Colstrip Steam Electric Station Colstrip Steam Electric Station Colstrip Steam Electric Station Colstrip Steam Electric Station Asheville Power Station Asheville Power Station Cape Fear Power Station Cape Fear Power Station Cape Fear Power Station H. B. Robinson Power Station

Units 1 & 2 Stage Evaporation Ponds (STEP)

Colstrip

MT

High

1992

2006

Yes

Yes

No Yes

Yes

Yes

Yes 2005

2009

No

No

176

4370

88

PPL Montana LLC PPL Montana LLC PPL Montana LLC Progress Energy Carolinas Inc Progress Energy Carolinas Inc Progress Energy Carolinas Inc Progress Energy Carolinas Inc Progress Energy Carolinas Inc Progress Energy Carolinas Inc Progress Energy Carolinas Inc Progress Energy Carolinas Inc Progress Energy Carolinas Inc

Units 3 & 4 Effluent Holding Pond (EHP) Colstrip Units 3 & 4 Scrubber Wash Tray Pond Colstrip Units 3 & 4 Bottom Ash Pond 1964 Pond 1982 Pond 1970 Pond 1978 Pond 1985 Pond Pond Colstrip Arden Arden Moncure Moncure Moncure Hartsville Wilmington Wilmington Goldsboro

MT MT MT NC NC NC NC NC SC NC NC NC

Low Low Low High High Low Significant Significant Low Low Low Low

1983 1983 1983 1964 1982 1970 1978 1985 1960 1971 1984 1980 1982, 2002 1983 1970, 2000, 2006 2006

Yes Yes No Yes Yes Yes Yes Yes Yes Yes Yes Yes

Yes No Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes

Yes Yes unit provided water to wash No Yes tray Yes No temp storage

Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes

Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes

Yes 2005 No No No 11/2007 No 11/2007 No 7/2005 No 7/2005 No 7/2005 No 11/2008 No 2008 No 2008 Yes 12/2008

2009

No No

No No No

367 8 8

17000 85 38

138 10 14 CBI Claim CBI Claim CBI Claim CBI Claim CBI Claim CBI Claim CBI Claim CBI Claim CBI Claim

2009

No No No No No No No No No No

Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes No No No No No No No No

No CBI Claim CBI Claim No CBI Claim CBI Claim No CBI Claim CBI Claim No CBI Claim CBI Claim No CBI Claim CBI Claim No CBI Claim CBI Claim No CBI Claim CBI Claim No CBI Claim CBI Claim No CBI Claim CBI Claim

L. V. Sutton Power Station 1971 Pond L. V. Sutton Power Station 1984 Pond Lee Power Station 1980 Pond

Company Progress Energy Carolinas Inc Progress Energy Carolinas Inc Progress Energy Carolinas Inc Progress Energy Carolinas Inc Progress Energy Carolinas Inc Salt River Proj Ag I & P Dist Santee Cooper (South Carolina Pub Serv Auth) Santee Cooper (South Carolina Pub Serv Auth) Santee Cooper (South Carolina Pub Serv Auth) Santee Cooper (South Carolina Pub Serv Auth) Santee Cooper (South Carolina Pub Serv Auth) Santee Cooper (South Carolina Pub Serv Auth) Santee Cooper (South Carolina Pub Serv Auth) Santee Cooper (South Carolina Pub Serv Auth) Santee Cooper (South Carolina Pub Serv Auth) Santee Cooper (South Carolina Pub Serv Auth) Santee Cooper (South Carolina Pub Serv Auth) Santee Cooper (South Carolina Pub Serv Auth) Santee Cooper (South Carolina Pub Serv Auth) South Carolina Electric&Gas Co South Carolina Electric&Gas Co South Carolina Electric&Gas Co South Carolina Electric&Gas Co South Carolina Electric&Gas Co South Carolina Electric&Gas Co

Facility Mayo Power Station Roxboro Power Station Roxboro Power Station Roxboro Power Station W. H. Weatherspoon Power Station Coronado Power Station Cross Power Station Cross Power Station 1982 Pond

Unit

City Roxboro Semora Semora Semora Lumberton St. Johns Pinesville Pinesville Pinesville Conway Conway Moncks Corner Moncks Corner Georgetown Georgetown Georgetown Georgetown Georgetown Georgetown Canadys Canadys Beech Island Beech Island Eastover Eastover

State NC NC NC NC NC AZ SC SC SC SC SC SC SC SC SC SC SC SC SC SC SC SC SC SC SC

1 Hazard Potential Significant Significant Significant Significant Low Significant None None None None None None None None None None None None None None None None None None None

2 Year Commissioned 1982 2008 1973 2008 1979 1979 1983 1995 1983 1966 1977 1970 1970 1975 1977 1980 1980 1980 1975 1989 1974 1977 1977 Early 1970's Early 1970's

3 3 2 3 Fly Bottom Boiler 3 Expansion(s) Ash Ash Slag FGD Yes No 1986 Yes No 2004, 2007 Yes Yes No No No 1967 1990 Yes Yes Yes Yes 1977 Yes No Yes No Yes Yes Yes Yes Yes Yes Yes Yes Yes No Yes No Yes Yes Yes Yes No Yes Yes Yes Yes Yes No Yes No Yes Yes Yes Yes Yes Yes Yes Yes Yes No

3 Other Residuals

4 PE Design Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes No Yes Yes No No

5 Last 5 Next Company Company 6 Last 6 Next 7 Significant 4 PE 4 PE Assessm Assessm Regulatory Regulatory Deficiencies Constructed Monitored ent ent Inspection Inspection Identified Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes No No No No No No 6/2004 No 2008 No 12/2008 No 2008 No 2005 Yes 10/2008 Yes quarterly Yes quarterly Yes quarterly Yes quarterly Yes quarterly No No Yes quarterly No quarterly No quarterly No quarterly Yes quarterly No quarterly No 2007 No 1995 No No No 1994 No 1994 9/1/2008 12/1/2008 12/1/2008 12/1/2008 No

7 Significant Deficiencies

FGD Flush Pond Ash Pond FGD Settling Pond 1979 Pond Evaporation Pond/Dam Bottom Ash 1 Bottom Ash 2

No Yes Yes No

No Rebuild Liner No No No No No No No No No No No No No No No No No No No No No No No

No Yes Yes No

7 8 Surface 8 Storage 8 Unit 9 Corrective Area Capacity Height Historical 9 Historical Releases Measures (acre) (acre ft) (ft) Releases Identified CBI No CBI Claim CBI Claim Claim No CBI Yes CBI Claim CBI Claim Claim Yes 2008 Pond Breach CBI No CBI Claim CBI Claim Claim No CBI No CBI Claim CBI Claim Claim No CBI Breach of an internal dike No CBI Claim CBI Claim Claim Yes 2001 No No No No No No No No No No No No No No No No No No No No 172 13 39 1 42 39 127 42 63 34 61 100 62 88 95 80 1 1 80 80 268 170 786 25 322 270 565 1190 1060 726 418 1000 1 4 1200 1200 745 23 170 53 18 14 6 7 13 20 10 31 12 22 30 32 24 20 12 14 8 24 24 No No No No No No No No No No No 2/14/08 Release of Yes wastewater - seal failure No No No No No No No No

Additional Data

Yes Yes other, process water Yes Yes No No

Cross Power Station Gypsum Pond Dolphus M. Grainger Power Station Ash Pond 1 Dolphus M. Grainger Power Station Ash Pond 2 Jefferies Power Station Jefferies Power Station Winyah Power Station Winyah Power Station Winyah Power Station Winyah Power Station Winyah Power Station Winyah Power Station Canadys Steam Power Station Canadys Steam Power Station Urquhart Generating Station Urquhart Generating Station Wateree Generating Station Wateree Generating Station WPS Energy Services Sunbury Generating Station Big Bend Power Station Big Bend Power Station Big Bend Power Station Big Bend Power Station Big Bend Power Station Big Bend Power Station Big Bend Power Station Big Bend Power Station Ash Pond A Ash Pond B Ash Pond B Slurry Pond 2 South Ash Pond Unit 3 & 4 Slurry Pond West Ash Pond Ash Pond A Active Ash Pond Inactive Ash Pond Ash Pond 2 Ash Pond 1 Ash Pond 2 Ash Pond 1

No Yes Yes Yes Yes Yes Yes No No No No No

No Yes Yes No

No Yes Yes Yes Yes Yes Yes Yes Yes Yes No No No other No other No Other No Other No Other No Other

Sunbury Generation LLC Tampa Electric Co Tampa Electric Co Tampa Electric Co Tampa Electric Co Tampa Electric Co Tampa Electric Co Tampa Electric Co Tampa Electric Co

Residual Waste Ash Basin No. 1 Settling Pond North Bottom Ash North Economizer Ash Pond North Recycle Pond South Bottom Ash Pond South Economizer Ash Pond South Recycle Pond Longterm Flyash Pond

Shamokin Dam Apollo Beach Apollo Beach Apollo Beach Apollo Beach Apollo Beach Apollo Beach Apollo Beach Apollo Beach

PA FL FL FL FL FL FL FL FL

None Low Low Low Low Low Low Low Low

1949 2009 1984 1984 2009 1984 1984 2009 1984 2001 2001 2001 2001

No No No Yes No No Yes No No

Yes No Yes No No Yes No No No

No

No other, waste water sludge

No Yes Yes Yes Yes Yes Yes Yes Yes

No Yes Yes Yes Yes Yes Yes Yes Yes

No monthly No visual monthly No visual monthly No visual monthly No visual monthly No visual monthly No visual monthly No visual monthly No visual

1/1/2009 1/1/2009 1/1/2009 1/1/2009 1/1/2009 1/1/2009 1/1/2009 1/1/2009 1/1/2009

No No No No No No No No No

No No No No No No No No No

62 1 517 6 26 6 7 9 12 5 100 5 54

6 21 25 25 18 25 25 17 9

No No No No No No No No No (5)seep north of plant; also " TVA has retained a third party consultant, Stantee, to assess each facility's CCR Units; results may be completed by Apr 2009;(6)Tennessee note under other in 6: "State of Tennessee has ordered TVA to conduct stability inspe (5)seep north of plant; also " TVA has retained a third party consultant, Stantee, to assess each facility's CCR Units; results may be completed by Apr 2009;(6)Tennessee note under other in 6: "State of Tennessee has ordered TVA to conduct stability inspe (5)" TVA has retained a third party consultant, Stantee, to assess each facility's CCR Units; results may be completed by Apr 2009;(6)Tennessee note under other in 6: "State of Tennessee has ordered TVA to conduct stability inspections at ALL of its Tenes (5)" TVA has retained a third party consultant, Stantee, to assess each facility's CCR Units; results may be completed by Apr 2009;(6)Tennessee note under other in 6: "State of Tennessee has ordered TVA to conduct stability inspections at ALL of its Tenes

No Yes Ash Residual No No No No Pyrite

No Yes Ash Residual No No No No Pyrite

No Yes Ash Residual No No Ash Residual

Tennessee Valley Authority Allen Fossil Plant

East Ash Disposal

Memphis

TN

Significant

1967

1978

Yes

No

No

No

Yes

Yes

Yes 2009

No

No

70

1240

20

No

Tennessee Valley Authority Allen Fossil Plant

East Ash Stilling Pond

Memphis

TN

Significant

1978

Yes

Yes

No

No

Yes

Yes

Yes 2009

No

No

23

180

20

No

Tennessee Valley Authority Bull Run Power Station

Gypsum Disposal Area 2A

Clinton

TN

Low

1981

2008

Yes

No

No Yes flows into fly ash pond

Yes

Yes

Yes 2009

No

No

42

1859

45

No

Tennessee Valley Authority Bull Run Power Station

Bottom Ash Disposal Area 1

Clinton

TN

Significant

1967

1980

No

Yes

No

No flows to fly ash pond

Yes

Yes

Yes 2009

No

No

32

543

52

No

Company

Facility

Unit

City

State

1 Hazard Potential

2 Year Commissioned

3 3 2 3 Fly Bottom Boiler 3 Expansion(s) Ash Ash Slag FGD

3 Other Residuals

4 PE Design

5 Last 5 Next Company Company 6 Last 6 Next 7 Significant 4 PE 4 PE Assessm Assessm Regulatory Regulatory Deficiencies Constructed Monitored ent ent Inspection Inspection Identified

7 Significant Deficiencies

7 8 Surface 8 Storage 8 Unit 9 Corrective Area Capacity Height Historical Measures (acre) (acre ft) (ft) Releases

9 Historical Releases Identified

Tennessee Valley Authority Bull Run Power Station

Dry Fly Ash Disposal Area

Clinton

TN

None

1982

1990

Yes

No

No

No

Yes

Yes

Yes 2009

No

No

17

3099

60

No

Tennessee Valley Authority Bull Run Power Station

Fly Ash Pond & Stilling Basin Area 2

Clinton

TN

High

1967

1978, 1981

Yes

Yes

No

No

Yes

Yes

Yes 2009

No

No

49

1859

20

No

Additional Data (5)regrade top, regrade rip/rap, erosion south side active; also " TVA has retained a third party consultant, Stantee, to assess each facility's CCR Units; results may be completed by Apr 2009;(6)Tennessee note under other in 6: "State of Tennessee has or (5)erosion south side; also " TVA has retained a third party consultant, Stantee, to assess each facility's CCR Units; results may be completed by Apr 2009;(6)Tennessee note under other in 6: "State of Tennessee has ordered TVA to conduct stability inspec (5)" TVA has retained a third party consultant, Stantee, to assess each facility's CCR Units; results may be completed by Apr 2009;(6)Tennessee note under other in 6: "State of Tennessee has ordered TVA to conduct stability inspections at ALL of its Tenes (5)" TVA has retained a third party consultant, Stantee, to assess each facility's CCR Units; results may be completed by Apr 2009;(6)Tennessee note under other in 6: "State of Tennessee has ordered TVA to conduct stability inspections at ALL of its Tenes (5)joint seal RCP spillway; also " TVA has retained a third party consultant, Stantee, to assess each facility's CCR Units; results may be completed by Apr 2009;(6)Tennessee note under other in 6: "State of Tennessee has ordered TVA to conduct stability i (5)" TVA has retained a third party consultant, Stantee, to assess each facility's CCR Units; results may be completed by Apr 2009;(6)Tennessee note under other in 6: "State of Tennessee has ordered TVA to conduct stability inspections at ALL of its Tenes (5)" TVA has retained a third party consultant, Stantee, to assess each facility's CCR Units; results may be completed by Apr 2009;(6)Tennessee note under other in 6: "State of Tennessee has ordered TVA to conduct stability inspections at ALL of its Tenes (5)" TVA has retained a third party consultant, Stantee, to assess each facility's CCR Units; results may be completed by Apr 2009;(6)Tennessee note under other in 6: "State of Tennessee has ordered TVA to conduct stability inspections at ALL of its Tenes (5)" TVA has retained a third party consultant, Stantee, to assess each facility's CCR Units; results may be completed by Apr 2009;(6)Tennessee note under other in 6: "State of Tennessee has ordered TVA to conduct stability inspections at ALL of its Tenes (5)" TVA has retained a third party consultant, Stantee, to assess each facility's CCR Units; results may be completed by Apr 2009;(6)Tennessee note under other in 6: "State of Tennessee has ordered TVA to conduct stability inspections at ALL of its Tenes (5)" TVA has retained a third party consultant, Stantee, to assess each facility's CCR Units; results may be completed by Apr 2009;(6)Tennessee note under other in 6: "State of Tennessee has ordered TVA to conduct stability inspections at ALL of its Tenes

Tennessee Valley Authority Colbert Power Station

Disposal Area 5

Tuscumbia

AL

None

1983

1990

Yes

No

No

No potentially ammoniated

Yes

Yes

Yes 2009

No

No

75

5578

120

No

Tennessee Valley Authority Colbert Power Station

Disposal Area 5 Basin

Tuscumbia

AL

Significant

1983

Yes

No

No

No

Yes

Yes

Yes 2009

No

No

12

372

17

No

Tennessee Valley Authority Colbert Power Station

Ash Pond 4

Tuscumbia

AL

High

1972

1984

Yes

Yes

No

No

Yes

Yes

Yes 2009

No

No

45

1240

40

No

Tennessee Valley Authority Cumberland Fossil Plant

Ash Pond

Cumberland City

TN

High

1969

1979

Yes

Yes

No

No

Yes

Yes

Yes 2/2009

2009

No

No

50

1240

35

No

Tennessee Valley Authority Cumberland Fossil Plant

Dry Ash Stack

Cumberland City

TN

None

1969

Yes

Yes

No

No

Yes

Yes

Yes 2/2009

2009

No

No

110

8058

35

No

Tennessee Valley Authority Cumberland Fossil Plant

Gypsum Storage Area (North/South)

Cumberland City

TN

High

1969

1995

No

No

No Yes

Yes

Yes

Yes 2/2009

2009

No

No

170

12397

140

No

Tennessee Valley Authority Gallatin Power Stationlatin Stilling Pond B, C, D

Gallatin

TN

Significant

1970

1986

Yes

Yes

No

No

Yes

Yes

Yes 2008

2009

No

No

55

372

10

No

Tennessee Valley Authority Gallatin Power Stationlatin Bottom Ash Pond A

Gallatin

TN

Significant

1970

1986, 1994

No

Yes

No

No

Yes

Yes

Yes 2008

2009

No

No

269

4339

25

No

Tennessee Valley Authority Gallatin Power Stationlatin Fly Ash Pond E

Gallatin

TN

Significant

1970

1986, 2006

Yes

Yes

No

No

Yes

Yes

Yes 2008

2009

No

No

157

4339

30

No

Company

Facility

Unit

City

State

1 Hazard Potential

2 Year Commissioned

3 3 2 3 Fly Bottom Boiler 3 Expansion(s) Ash Ash Slag FGD

3 Other Residuals

4 PE Design

5 Last 5 Next Company Company 6 Last 6 Next 7 Significant 4 PE 4 PE Assessm Assessm Regulatory Regulatory Deficiencies Constructed Monitored ent ent Inspection Inspection Identified

7 Significant Deficiencies

7 8 Surface 8 Storage 8 Unit 9 Corrective Area Capacity Height Historical Measures (acre) (acre ft) (ft) Releases

9 Historical Releases Identified

Additional Data (5)" TVA has retained a third party consultant, Stantee, to assess each facility's CCR Units; results may be completed by Apr 2009;(6)Tennessee note under other in 6: "State of Tennessee has ordered TVA to conduct stability inspections at ALL of its Tenes (5)" TVA has retained a third party consultant, Stantee, to assess each facility's CCR Units; results may be completed by Apr 2009;(6)Tennessee note under other in 6: "State of Tennessee has ordered TVA to conduct stability inspections at ALL of its Tenes (5)" TVA has retained a third party consultant, Stantee, to assess each facility's CCR Units; results may be completed by Apr 2009;(6)Tennessee note under other in 6: "State of Tennessee has ordered TVA to conduct stability inspections at ALL of its Tenes (5)" TVA has retained a third party consultant, Stantee, to assess each facility's CCR Units; results may be completed by Apr 2009;(6)Tennessee note under other in 6: "State of Tennessee has ordered TVA to conduct stability inspections at ALL of its Tenes (5)" TVA has retained a third party consultant, Stantee, to assess each facility's CCR Units; results may be completed by Apr 2009;(6)Tennessee note under other in 6: "State of Tennessee has ordered TVA to conduct stability inspections at ALL of its Tenes (5)" TVA has retained a third party consultant, Stantee, to assess each facility's CCR Units; results may be completed by Apr 2009;(6)Tennessee note under other in 6: "State of Tennessee has ordered TVA to conduct stability inspections at ALL of its Tenes (5)" TVA has retained a third party consultant, Stantee, to assess each facility's CCR Units; results may be completed by Apr 2009;(6)Tennessee note under other in 6: "State of Tennessee has ordered TVA to conduct stability inspections at ALL of its Tenes (5)" TVA has retained a third party consultant, Stantee, to assess each facility's CCR Units; results may be completed by Apr 2009;(6)Tennessee note under other in 6: "State of Tennessee has ordered TVA to conduct stability inspections at ALL of its Tenes (5)" TVA has retained a third party consultant, Stantee, to assess each facility's CCR Units; results may be completed by Apr 2009;(6)Tennessee note under other in 6: "State of Tennessee has ordered TVA to conduct stability inspections at ALL of its Tenes (5)" TVA has retained a third party consultant, Stantee, to assess each facility's CCR Units; results may be completed by Apr 2009;(6)Tennessee note under other in 6: "State of Tennessee has ordered TVA to conduct stability inspections at ALL of its Tenes (5)" TVA has retained a third party consultant, Stantee, to assess each facility's CCR Units; results may be completed by Apr 2009;(6)Tennessee note under other in 6: "State of Tennessee has ordered TVA to conduct stability inspections at ALL of its Tenes

Tennessee Valley Authority John Sevier Power Station Dry Ash Stack

Rogersville

TN

None

1955

Yes

No

No

No

Yes

Yes

Yes 11/2007

2009

No

No

84

2479

101

No

Tennessee Valley Authority John Sevier Power Station Bottom Ash Pond

Rogersville

TN

Significant

1979

Yes

Yes

No

No

Yes

Yes

Yes 11/2007

2009

No

No

41

620

25

No

Tennessee Valley Authority Johnsonville Power Station Ash Disposal Area 2

New Johnsonville TN

Significant

1970

1978

Yes

Yes

No

No

Yes

Yes

Yes 11/2007

2009

No

No

87

2479

30

No

Tennessee Valley Authority Kingston Power Station

Main Ash Pond

Harriman

TN

Significant

1951

1968

Yes

Yes

No

No

Yes

Yes

Yes 10/2008

2009

No

No

92

8678

50

No

Tennessee Valley Authority Kingston Power Station

Stilling Pond

Harriman

TN

Significant

1978

Yes

Yes

No

No

Yes

Yes

Yes 10/2008

2009

No

No

29

290

50

No

Tennessee Valley Authority Paradise Power Station

Fly Ash Extension Area Pond

Drakesboro

KY

Low

1971

1997

Yes

No

No

No

Yes

Yes

Yes 10/2008

2009

No

No

203

3719

34

No

Tennessee Valley Authority Paradise Power Station

Scrubber Sludge Complex

Drakesboro

KY

Low

1986

Yes

No

No Yes

Yes

Yes

Yes 10/2008

2009

No

No

255

532

62

No

Tennessee Valley Authority Paradise Power Station

Slag Areas 2A & 2B

Drakesboro

KY

Low

1967

1970

No

Yes

No

No

Yes

Yes

Yes 10/2008

2009

No

No

27

600

24

No

ShawneeShawnee Power Tennessee Valley Authority Station

Ash Pond

West Paducah

KY

Significant

1952

1971, 1979

Yes

Yes

No

No

Yes

Yes

Yes 2/2009

2009

No

No

180

3099

25

No

ShawneeShawnee Power Tennessee Valley Authority Station

Consolidated Waste Dry Stack

West Paducah

KY

None

1984

2000

Yes

Yes

No

No

Yes

Yes

Yes 2/2009

2009

No

No

200

20454

100

No

Tennessee Valley Authority Watts Bar Fossil

Ash Pond 1 Stilling Basin

Rhea County

TN

Significant

1974

1977

Yes

Yes

No

No

Yes

Yes

Yes 2/2009

2009

No

No

14

143

30

No

Company

Facility

Unit

City

State

1 Hazard Potential

2 Year Commissioned

3 3 2 3 Fly Bottom Boiler 3 Expansion(s) Ash Ash Slag FGD

3 Other Residuals

4 PE Design

5 Last 5 Next Company Company 6 Last 6 Next 7 Significant 4 PE 4 PE Assessm Assessm Regulatory Regulatory Deficiencies Constructed Monitored ent ent Inspection Inspection Identified

7 Significant Deficiencies

7 8 Surface 8 Storage 8 Unit 9 Corrective Area Capacity Height Historical Measures (acre) (acre ft) (ft) Releases

9 Historical Releases Identified

Additional Data (5)monitor seepage south perimeter dike next to stilling pond; also" TVA has retained a third party consultant, Stantee, to assess each facility's CCR Units; results may be completed by Apr 2009;(6)Tennessee note under other in 6: "State of Tennessee has (5)wet area at southern lower perimeter dike, seep in dike between stilling and pump ponds; also " TVA has retained a third party consultant, Stantee, to assess each facility's CCR Units; results may be completed by Apr 2009;(6)Tennessee note under other

Widows Creek Power Tennessee Valley Authority Station

Gypsum Stack (Wet Stacking Area)

Stevenson

AL

High

1986

1992

Yes

Yes

No Yes

Yes

Yes

Yes 10/2008

2009

No

No

110

11157

75

No

Tennessee Valley Authority Tri-State G & T Assn Inc Tri-State G & T Assn Inc Tri-State G & T Assn Inc Tri-State G & T Assn Inc Tri-State G & T Assn Inc Tri-State G & T Assn Inc Tri-State G & T Assn Inc Vectren Vectren Vectren Vectren Westar Energy Westar Energy Westar Energy Westar Energy Westar Energy Westar Energy Westar Energy Westar Energy Westar Energy Western Farmers Elec Coop Inc Western Farmers Elec Coop Inc Western Farmers Elec Coop Inc Western Farmers Elec Coop Inc Western Kentucky Energy Corp Western Kentucky Energy Corp Western Kentucky Energy Corp

Widows Creek Power Station Craig Power Station Craig Power Station Escalante Power Station Escalante Power Station Escalante Power Station Escalante Power Station Nucla Power Station

Ash Pond Concentrator Decant Basin #1 Concentrator Decant Basin #2 South Bottom Ash Pond Evaporation Pond 1 North Bottom Ash Pond Emergency Scrubber Pond Coal/Ash Settling Basin

Stevenson Craig Craig Prewitt Prewitt Prewitt Prewitt Nucla Evansville Evansville Newburgh Newburgh Saint Marys Saint Marys Saint Marys Lawrence Lawrence Lawrence Lawrence Tecumseh Tecumseh Fort Towson Fort Towson Fort Towson Fort Towson Hawesville Hawesville Hawesville

AL CO CO NM NM NM NM CO IN IN IN IN KS KS KS KS KS KS KS KS KS OK OK OK OK KY KY KY

Significant None None Low Significant Low None None Significant None None None None Significant None None None None None None None None None None None Low Significant None

1950 1978 1978 1984 1984 1984 1984 1997 1978 2002 1973 1960's mid 1980's 1978 early 1980's 1976 1969 1976 1969 1984 Pre 1980 1982 1982 1982 1982 2007-2008 1979 1971

2005

Yes No No No No No No Yes Yes

Yes Yes Yes Yes No Yes No Yes Yes No Yes Yes Yes Yes Yes Yes Yes Yes Yes No Yes No Yes Yes No Yes Yes Yes

No No No No No No No No Yes No Yes Yes Yes Yes Yes Yes Yes Yes Yes No Yes No No No No No No No

Yes Yes Yes No Yes No Yes No FGD Belt wash, pyrites, No boiler cleanout No Plant make up water No FGD Belt Filter wash, other No FGD Belt Filter wash, other No No Yes Yes Yes Yes Yes No Other No Other No No No No No Other No No

Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes No No No Yes Yes No No No No No No Yes Yes Yes Yes Yes Yes Yes

Yes Yes Yes Yes Yes Yes Yes Yes No Yes No No No No No No No No No No No Yes Yes Yes Yes Yes Yes No

Yes No No Yes Yes Yes Yes No

A. B. Brown Power Station Lower Dam A. B. Brown Power Station Upper Dam F. B. Culley Power Station East Pond F. B. Culley Power Station Jeffrey Energy Center Jeffrey Energy Center Jeffrey Energy Center Lawrence Energy Center Lawrence Energy Center Lawrence Energy Center Lawrence Energy Center Tecumseh Energy Center Tecumseh Energy Center Hugo Power Station Hugo Power Station Hugo Power Station Hugo Power Station Coleman Generating Station Coleman Generating Station Coleman Generating Station West Pond Bottom Ash Settling Pond Bottom Ash Lake Dam Bottom Ash Pond Dam Area 4 Area 2 Area 3 Area 1 Area 2 (Clear Pond) Area 1 (NPDES Ash Pond) North Fly Ash North Bottom Ash Unit South Bottom Ash South Fly Ash Unit New Ash Pond Ash Pond South Ash Pond

2007

No Yes Yes No No No Yes Yes Yes Yes No Yes Yes No No Yes Yes Yes Yes

10/2008 2009 9/30/2008 9/30/2008 2/2009 1/2009 2/2009 2/2009 9/23/2008 visual No daily visual No daily No No No No 9/2008 No 9/2008 No No No No No No No 1/2009 No 1/2009 No 1/2009 No 1/2009 No 3/24/2009 No 3/24/2009 No 3/24/2009 informal internal inspection No s informal internal inspection No s No No No

7/1/2003 7/1/2007 7/1/2003 11/19/2007 1/30/2008 1/30/2008

No No No No No No No No No No No No No No No No No No No No No

No No No No No No No No No No No No No No No No No No No No No No No No No No No No

310 0 0 13 2 13 1 0 53 103 7 0 52 117 72 14 10 18 5 1 2 18 34 34 18 64 23 20

11777 0 0

0

50 1 1 12 7 12 2 1 59 17

No No No No No No No No No No No No No No No No No No No No No No No No No No No No

372 364 352 80 262 185 155 273 70

0 0 22 22 22 13 13 13 13 0 0 30 11 11 27 34 33 15

2000

1980

8- Height Below Grade 8- Height Below Grade

3/1/2009 3/1/2009 3/1/2009 3/1/2009

No No No No No

332 344 344 332 2417 1043

4/3/2009

No No

Western Kentucky Energy Corp

R D Green

Ash Pond Dam #0980

Henderson

KY

Low

1978

No

Yes

No

No

Yes

No

12/1/2008

Past inspections required corrective No action on erosion

Yes

21

No

Western Kentucky Energy Corp Xcel Energy Xcel Energy Xcel Energy Xcel Energy Xcel Energy Xcel Energy Xcel Energy Xcel Energy Xcel Energy Xcel Energy Xcel Energy Xcel Energy Xcel Energy Xcel Energy Xcel Energy Xcel Energy Xcel Energy Xcel Energy Xcel Energy Xcel Energy Xcel Energy Xcel Energy

Reid/Green/HMP&L Station Two NSP-M Minnesota Valley Plant NSP-M Minnesota Valley Plant NSP-M Minnesota Valley Plant NSP-M Minnesota Valley Plant NSP-W Bay Front Plant NSP-W Bay Front Plant PSCo Arapahoe Station PSCo Arapahoe Station PSCo Arapahoe Station PSCo Arapahoe Station PSCo Arapahoe Station PSCo Arapahoe Station PSCo Cameo Station PSCo Cameo Station PSCo Cherokee Station PSCo Cherokee Station PSCo Cherokee Station PSCo Cherokee Station PSCo Cherokee Station PSCo Cherokee Station PSCo Comanche Station PSCo Comanche Station

Ash Pond Pond 1 Pond 4 Pond 3 Pond 2 Surge Basin Polishing Pond Discharge Pond Emergency Pond South Ash Pond South Storm Water/Process Water Pond North Storm Water/Process Water Pond Ash Pump Pond Ash Silo Storm Water Retention Pond Process Water Retention Pond East Polishing Pond West Ash Pond Center Ash Pond East Ash Pond West Polishing Pond Emergency Spill Pond Ash Pond #2 Ash Pond #1

Robards Granite Falls Granite Falls Granite Falls Granite Falls Ashland Ashland Denver Denver Denver Denver Denver Denver Grand Junction Grand Junction Denver Denver Denver Denver Denver Denver Pueblo Pueblo

KY MN MN MN MN WI WI CO CO CO CO CO CO CO CO CO CO CO CO CO CO CO CO

Significant None None None None None None None None None None None None None None None None None None None None None None

1971 Early 1950's 1975 1975 Early 1950's 1976 1976 1965 1965 1965 1965 1965 1950 About 1956 About 1956 1979 1957 1957 1957 1979 1979 1972 1972

Yes Yes Yes Yes Yes No No No No No No No No Yes Yes No Yes Yes Yes No No No No

Yes Yes Yes Yes Yes No No Yes Yes Yes Yes Yes No Yes Yes No Yes Yes Yes No No No No

No Yes No No No No Yes Yes No No No No No No No No No Yes Yes Yes No No No No No No No No No No No Other No No No No No Other No No No Yes Yes Yes No No Yes Yes

No No No No No Yes Yes No No No No No No No No No No No No No No Yes Yes

No No No No No No No No No No No No No No No No No No No No No Yes Yes

12/1/2008

No No No No No No No No No No No No No No No No No No No No No No No

No No No No No No No No No No No No No No No No No No No No No No No 1 1 1 1 0 0 1 2 1 1 1 0 0 0 1 0 0 0 1 0 2 2 7 7 7 7 1 3 7 12 14 14 8 4 1 2 16 8 10 8 16 0 12 12

39 12 9 9 12 10 8 0 0 0 0 0 0 12 0 0 0 0 0 0 8 0 0

No No No No No No No No No No No No No No No No No No No No No No No

No No No No No No No No No No No No No No No No No No No

8- height below grade 8- height below grade 8- height below grade 8- height below grade 8- height below grade 8- height below grade

Other

Other Other Other Other

8- height below grade 8- height below grade 8- height below grade 8- height below grade 8- height below grade 8- height below grade

Xcel Energy Xcel Energy Xcel Energy Xcel Energy Xcel Energy Xcel Energy Xcel Energy Xcel Energy

PSCo Comanche Station PSCo Comanche Station PSCo Comanche Station PSCo Hayden Station PSCo Hayden Station PSCo Hayden Station PSCo Hayden Station PSCo Hayden Station

Polishing Pond (#4) Ash Disposal Facility (ADF) Stormwater Retention Pond Ash Pond #3 Common Wet Ash Settling Basin Fly Ash Decant Basin Intermediate Quality Pond High Quality Pond High Quality Skimmer Pond

Pueblo Pueblo Pueblo Hayden Hayden Hayden Hayden Hayden

CO CO CO CO CO CO CO CO

None None None None None Low Low Low

1972 1987 1972 1992 1992 1975 1975 1975

No Yes No Yes Yes Yes Yes Yes

Yes Yes Yes Yes Yes Yes Yes Yes

No Yes No Yes Other No No No Yes No Yes No Yes No Yes No Yes

Yes Yes Yes No No Yes Yes Yes

Yes Yes Yes No No Yes Yes Yes

No No No No No No No Yes 5/9/2007 5/9/2007 5/9/2007

No No No No No Crest grading, vegetation and rodent No control Crest grading, vegetation and rodent No control Crest grading, vegetation and rodent No control

No No No No No Yes Yes Yes

2 1 2 0 0 20 4 1

12 8 12 0 0 274 1 2

0 0 0 0 0 22 15 19

8- height below grade 8- height below grade April 9, 2007- between 2,000-3,000 gallons spilled Yes from a broken pipe 8- height below grade No No No No No No No 8- height below grade 8- height below grade 8- height below grade 8- height below grade

Company Xcel Energy Xcel Energy Xcel Energy Xcel Energy Xcel Energy Xcel Energy Xcel Energy Xcel Energy Xcel Energy Xcel Energy Xcel Energy

Facility PSCo Hayden Station PSCo Pawnee Station PSCo Pawnee Station PSCo Pawnee Station PSCo Pawnee Station PSCo Pawnee Station PSCo Pawnee Station PSCo Pawnee Station PSCo Valmont Station PSCo Valmont Station PSCo Valmont Station

Unit Ash Disposal Facility (ADF) Contact Storm Water Pond Evaporative Pond C New Bottom Ash Water Recovery Pond Bottom Ash Disposal Pond Ash Water Recovery Pond Evaporative Pond B Ash Disposal Facility (ADF) Intermediate Quality (IQ) Water Pond

City Hayden Brush Brush Brush Brush Brush Brush Brush

State CO CO CO CO CO CO CO CO CO CO CO

1 Hazard Potential None Low None None None Low None Low None None None

2 Year Commissioned 1983 1980 2005 1980 1980 1980 Late 1970's 1980 1993 1964 1964

3 3 2 3 Fly Bottom Boiler 3 Expansion(s) Ash Ash Slag FGD Yes No No No No No Yes No Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes No Yes Yes No Yes No No No No No No No No No No No

3 Other Residuals

4 PE Design No Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes

5 Last 5 Next Company Company 6 Last 6 Next 7 Significant 4 PE 4 PE Assessm Assessm Regulatory Regulatory Deficiencies Constructed Monitored ent ent Inspection Inspection Identified No No No No No No No No No No No No No No No No No No No No No No 12/2008 12/2008 No

7 Significant Deficiencies

7 8 Surface 8 Storage 8 Unit 9 Corrective Area Capacity Height Historical Measures (acre) (acre ft) (ft) Releases No No No No No No No No No No No 1 10 6 13 1 15 34 4 0 1 1 4 54 32 75 5 71 1349 22 0 16 16 0 13 16 10 0 13 0 21 0 0 0 No No No No No No No No No No

9 Historical Releases Identified

Additional Data 8- height below grade

Dec 2008- Liner damage, road Yes erosion , no pond gage rods No No No Dec 2008- Road erosion, no pond Yes gage rods No No No No No

8 - height below grade

No No other No

8 - height below grade

2002

Coal Pile Stormwater Runoff Pond Boulder East Ash Settling Pond Boulder West Ash Settling Pond Boulder

No Yes No Yes No Yes

8 - height below grade 8 - height below grade 8 - height below grade

Feb 14, 2008 - 25 cu yd Yes spill of bottom ash slurry


								
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