Information Request Responses from Electric 

Utilities

Responses From Electric Utilities to EPA Information Request Letter

EPA has received responses to Information Requests (IR) sent out in March, April and December of 

2009.* Posted below are all of the responses covering 228 facilities and 629 surface impoundments 

and similar management units, with the exception of information claimed as confidential business 

information. EPA will review all confidential business information claims and will post all information 

that is determined not to meet confidential business information criteria. Additional facility responses 

will be posted on this page as EPA completes a quality review. 

The 228 facilities that responded to EPA’s information request have 629 surface impoundments and 

similar management units; 200 units (32 percent) have been given a hazard potential rating using the 

National Inventory of Dams criteria. Of the 200 units that have been rated, 50 units (25 percent) are 

rated as High Hazard Potential; 71units (36 percent) are rated as Significant Hazard Potential; 71 

units (36 percent) are rated as Low Hazard Potential; and 8 units (4 percent) are rated as Less than 

Low Hazard Potential. 429 units (68 percent) have not received a hazard potential rating. The hazard 

potential ratings do not assess the stability of these units; the ratings assess the potential for loss of 

life or environmental and economic damage. Units rated as High Potential Hazard are those where 

failure will probably cause loss of life.

Of the 629 surface impoundments and similar units covered in these responses, 443 (70 percent) 

were designed by a professional The units show considerable variation in height, with 80 units (13 

percent) being reported as greater than 50 feet in height; 133 units (21 percent) being reported as 

greater than 25 feet, but less than 51 feet in height; 268 units (43 percent) being reported as greater 

than 6 feet, but less than 26 feet in height; 39 units (6 percent) being reported as greater than 0 feet, 

but less than 7 feet in height; and 105 units (17 percent) being reported as having no height. 

A majority of the information contained in the company responses has been inserted into a database. 

All the fields and entries in this database have been extracted and presented below in PDF and 

Microsoft Excel spreadsheets which enable users to easily search for aggregate or facility-specific 

information.

*We will likely be sending out more information requests in the future as new impoundments are 

identified. As we receive new information, the numbers below will be updated accordingly. We 

previously reported a total of 219 facilities with 584 surface impoundments; these numbers have 

changed as a result of new information. 
The companies in the table below have at some point claimed their responses contained confidential 

business information (CBI). While EPA reviews these claims, the information that is claimed as CBI is 

redacted (removed) from the coal ash survey results and survey responses from these companies. 

Reference to this information is also removed from the coal ash reports. If these claims are accepted 

by the EPA, the information will remain redacted. If EPA denies these claims, the information will be 

posted. 

CBI Claims

Company that Claims CBI Survey Question(s) 

Claimed 

Confidential

EPA’ Determination 

on CBI Claim

Alabama Power Company

- Barry Power Station

- Gadsden Power Station

- Gorgas Power Station

- Greene County Power Station

- James H. Miller Jr Power Station

- Earnest C. Gaston Electric Generating 

Plant

5, 6, 7, 8

5, 6, 7, 8

5, 6, 7, 8

5, 6, 7, 8

5, 6, 7, 8

5, 6, 7, 8

Denied

Denied

Denied

Denied

Denied

Denied

Duke Energy Corporation 8 Denied

First Energy Generation Corporation -

Little Blue Run Dam

8 Denied

Georgia Power Company

- Bowen Power Station

- Kraft Power Station

- McIntosh Power Station

- Harlee Branch Power Station 

- Scherer Power Station 

- Plant Hammond

- Plant McDonough

- Plant Mitchell

- Plant Yates

- Wansley Power Station 

5, 6, 7, 8

5, 6, 7, 8

5, 6, 7, 8

5, 6, 7, 8

5, 6, 7, 8

5, 6, 7, 8

5, 6, 7, 8

5, 6, 7, 8

5, 6, 7, 8

5, 6, 7, 8

Denied 

Denied 

Denied 

Denied 

Denied 

Denied

Denied

Denied

Denied

Denied

Gulf Power Company 5, 8 Denied 

Mississippi Power Company 5, 6, 7, 8 Denied

If you have any questions regarding EPA's information collection effort or field assessments of coal 

combustion residual impoundments, or if you identify any errors/discrepancies please contact Jim 

Kohler (kohler.james@epa.gov, 703-347-8953), Jana Englander (englander.jana@epa.gov, 703-308-

8711), or Craig Dufficy (dufficy.craig@epa.gov, 703-308-9037). 

Database of Survey Responses 

Database Results (PDF) (28p, 106K)

Database Results (XLS) (310K)

Survey Questions (PDF) (1 pg, 247K)

You will need Adobe Reader to view some of the files on this page. See EPA's PDF page to learn 

more. 
NOTE: Documents open faster if your browser is open. If you have problems accessing documents 

from the following links, you can either right-click on the link, copy the link location, and paste it into 

your browser; or you can access the documents from EPA's website at 

http://www.epa.gov/epawaste/nonhaz/industrial/special/fossil/surveys/index.htm

Survey Responses 

A | B | C | D | E | F | G | H | I | J | K | L | M | N | O | P | Q | R | S | T | U | V | W | X | Y | Z

A

Alabama Power Company - Various Sites (PDF) (13 pp, 1.0MB)

Alabama Power Company - Gaston Power Plant (PDF) (8 pp, 351K)

Allegheny Energy Supply Co., LLC - Pleasants Power Station McElroy's Run Embankment and 

Impoundment (PDF) (14 pp, 485K)

Allegheny Energy Supply Co., LLC - R. Paul Smith Power Station Lagoon Dam #3 (PDF) (13 pp, 493K)

Allegheny Energy Supply Co., LLC - R. Paul Smith Power Station Lagoon Dam #4 (PDF) (14 pp, 482K)

Allete, Inc. - All Facilities (PDF) (16 pp, 844K)

Alliant Energy - Columbia Power Station (PDF) (12 pp, 572K)

Alliant Energy - Burlington Power Station (PDF) (14 pp, 755K)

Alliant Energy - Dubuque Power Station (PDF) (8 pp, 402K)

Alliant Energy - Edgewater Power Station (PDF) (15 pp, 828K)

Alliant Energy - Fox Lake Power Station (PDF) (8 pp, 404K)

Alliant Energy - ML Kapp Power Station (PDF) (12 pp, 678K)

Alliant Energy - Nelson Dewey Power Station (PDF) (9 pp, 487K)

Alliant Energy - Ottumwa Power Station (PDF) (9 pp, 492K)

Alliant Energy - Ottumwa Midland Landfill (PDF) (9 pp, 486K)

Alliant Energy - Prairie Creek Power Station (PDF) (21 pp, 1.2MB)

Alliant Energy - Rock River Power Station (PDF) (12 pp, 656K)

Alliant Energy - Sixth Street Power Station (PDF) (12 pp, 654K)

Alliant Energy - Sutherland Power Station (PDF) (11 pp, 593K)

Alliant Energy - Lansing Power Station (PDF) (9 pp, 440K)

Ameren Energy Generating Co. - All Facilities (PDF) (15 pp, 603K)

Ameren UE - All Facilities (PDF) (14 pp, 535K)

Ameren UE - Additional Facilities (PDF) (8 pp, 358K)

American Electric Power (AEP) (PDF) (3 pp, 127K) - the companies indented below are subsidiaries of 

AEP 

 Appalachian Power Co. - Clinch River (PDF) (2 pp, 13K)

 Appalachian Power Co. - Glen Lyn Power Station (PDF) (1 pg, 11K)

 Appalachian Power Co. - John E. Amos Power Station (PDF) (3 pp, 341K)

 Appalachian Power Co. - Kanawha River Power Station (PDF) (2 pp, 11K)

 Appalachian Power Co. - Mountaineer Power Station (PDF) (1 pg, 11K)

 Appalachian Power Co. - Philip Sporn Power Station (PDF) (2 pp, 13K)

 Cardinal Operating Co. - Cardinal Power Station (PDF) (2 pp, 13K)

 Columbus Southern Power Co. - Conesville Power Station (PDF) (1 pg, 11K)

 Columbus Southern Power Co. - Picway Power Station (PDF) (1 pg, 10K)

 Indiana Michigan Power Co. - Rockport Power Station (PDF) (1 pg, 10K)

 Indiana Michigan Power Co. - Tanners Creek Power Station (PDF) (1 pg, 13K)

 Kentucky Power Co. - Big Sandy Power Station (PDF) (2 pp, 13K)

 Ohio Power Co. - General James M Gavin Power Station (PDF) (2 pp, 11K)

 Ohio Power Co. - Kammer Power Plant (PDF) (1 pg, 10K)

 Ohio Power Co. - Mitchell Power Plant (PDF) (2 pp, 13K)

 Ohio Power Co. - Muskingum River Power Station(PDF) (1 pg, 12K)

 Oklahoma Public Service Co. - Northeastern 3 and 4 Plant (PDF) (1 pg, 11K)

 Oklahoma Public Service Co. - Oklaunion Power Station (PDF) (1 pg, 10K)

 Southwestern Electric Power Co. - Flint Creek Power Station (PDF) (1 pg, 11K)
 Southwestern Electric Power Co. (SWEPC) - Pirkey Power Station (PDF) (2 pp, 

14K)

 Southwestern Electric Power Co. (SWEPC) - Welsh Plant (PDF) (1 pg, 11K)

Arizona Public Service Co. - Cholla Power Station (PDF) (10 pp, 3.1MBK)

Arizona Public Service Co. - Four Corners Power Station (PDF) (14 pp, 595K)

Arizona Electric Power Cooperative, Inc. - Apache Station Combustion Waste Disposal Facility (PDF)

(10 pp, 533K)

Associated Electric Cooperative Inc. - New Madrid Power Station (PDF) (4 pp, 292K)

Associated Electric Cooperative Inc. - Thomas Hill Energy Center (PDF) (5 pp, 319K)

B

Basin Electric Power Coop - Antelope Valley Station (PDF) (3 pp, 132K)

Basin Electric Power Coop - Antelope Valley Station - Additional Information (PDF) (6 pp, 260K)

Basin Electric Coop - Laramie River Power Station (PDF) (5 pp, 222K)

Basin Electric Coop- Leland Olds Power Station (PDF) (6 pp, 249K)

C

City of Independence - Blue Valley Power Station (PDF) (5 pp, 224K)

City of Los Angeles - Intermountain Power Project (PDF) (10 pp, 566K)

City of Sikeston - Sikeston Power Station (PDF) (10 pp, 765K)

City of Springfield - All Facilities (PDF) (5 pp, 222K)

CLECO Power LLC - Dolet Hills Power Station (PDF) (19 pp, 695K)

CLECO Power LLC - Rodemacher Power Station (PDF) (7 pp, 320K)

Consumers Energy Co. - All Facilities (CEC) (PDF) (20 pp, 1.7MB)

Coleto Creek Power LP - Coleto Creek Power Station (PDF) (8 pp, 328K)

D

Dayton Power and Light Co. - Hutchings Station (PDF) (5 pp, 792K)

Dayton Power and Light Co. - Killen Station (PDF) (5 pp, 273K)

Dayton Power and Light Co. - JM Stuart Power Station (PDF) (5 pp, 201K)

Detroit Edison Co. - Monroe Power Station (PDF) (6 pp, 379K)

Dominion - All Facilities (PDF) (22 pp, 1.7MB)

Dynegy Midwest Generation, Inc.- Baldwin Energy Complex (PDF) (7 pp, 333K)

Dynegy Midwest Generation, Inc.- Havana Power Station (PDF) (8 pp, 417K)

Dynegy Midwest Generation, Inc. - Hennepin Power Station (PDF) (7 pp, 342K)

Dynegy Midwest Generation, Inc. (PDF) (2 pp, 70K)

Dynegy Midwest Generation, Inc.- Vermilion Power Station(PDF) (8 pp, 395K)

Dynegy Midwest Generation, Inc.- Wood River Power Station (PDF) (8 pp, 418K)

Duke Energy Carolinas - Allen Steam Station (PDF) (5 pp, 270K)

Duke Energy Carolinas - Belews Creek Steam Station (PDF) (5 pp, 269K)

Duke Energy Carolinas - Buck Steam Station (PDF) (5 pp, 275K)

Duke Energy Carolinas - Cliffside Steam Station (PDF) (6 pp, 293K)

Duke Energy Carolinas - Dan River Steam Station (PDF) (6 pp, 280K)

Duke Energy Carolinas - Lee Steam Station (PDF) (5 pp, 259K)

Duke Energy Carolinas - Marshall Steam Station (PDF) (5 pp, 270K)

Duke Energy Carolinas - Riverbend Steam Station (PDF) (5 pp, 271K)

Duke Energy Indiana - Cayuga Generating Station (PDF) (5 pp, 246K)

Duke Energy Indiana - Edwardsport Generating Station (PDF) (5 pp, 257K)

Duke Energy Indiana - Gallagher Generating Station (PDF) (5 pp, 266K)

Duke Energy Indiana - Gibson Generating Station (PDF) (5 pp, 270K)

Duke Energy Indiana - Wabash River Generating Station (PDF) (5 pp, 266K)
Duke Energy Ohio - Miami Fort Generating Station (PDF) (6 pp, 272K)

Duke Energy Ohio - Walter Beckjord Generating Station (PDF) (5 pp, 272K)

Duke Energy Ohio - WH Zimmer Generating Station (PDF) (5 pp, 272K)

Duke Energy Kentucky - East Bend Generating Station (PDF) (5 pp, 267K)

E

Edison International - EME Homer City Generating Station (PDF) (20 pp, 2MB)

Empire District Electric Co. - Asbury Power Station (PDF) (5 pp, 221K)

Empire District Electric Co. - Riverton Power Station (PDF) (4 pp, 214K)

East Kentucky Power Cooperative, Inc. - All Facilities (PDF) (24 pp, 927K)

F

First Light Power Resources - Mt. Tom Station (PDF) (5 pp, 207K)

First Energy - Bruce Mansfield Power Station (PDF) (4 pp, 240K)

First Energy - Blue Run Dam (PDF) (6 pp, 276K)

G

Georgia Power - Plant McIntosh (PDF) (4pp, 221K)

Georgia Power - Various Facilities (PDF) (14 pp, 824K)

Georgia Power - Various Facilities, Part II (PDF) (15 pp, 846K)

Gulf Power - Lansing Smith Power Station (PDF) (6 pp, 343K)

H

Hoosier Energy Rec Inc. Frank E. Ratts Power Station (PDF) (5 pp, 206K)

Hoosier Energy Rec Inc. - Merom Generating Station (PDF) (4 pp, 190K)

I

Indiana-Kentucky Electric Corp. - Clifty Creek Power Station (PDF) (3 pp, 176K)

Indianapolis Power and Light Co. - Harding Steet Power Station (PDF) (16 pp, 587K)

Indianapolis Power and Light Co. - Eagle Valley Power Station (PDF) (6 pp, 376K)

Indianapolis Power and Light Co. - Petersburg Power Station (PDF) (5 pp, 296K)

J - no entries

K

Kansas City Board of Public Utilities - Nearman Creek Power Station (PDF) (6 pp, 273K)

Kansas City Power and Light Co. - GMO Lake Road Generating Station (PDF) (7 pp, 373K)

Kansas City Power and Light Co. - GMO Sibley Power Station (PDF) (7 pp, 792K)

Kansas City Power and Light Co. - Hawthorn Power Station (PDF) (4 pp, 216K)

Kansas City Power and Light Co. - Iatan Power Station (PDF) (4 pp, 217K)

Kansas City Power and Light Co. - La Cygne Power Station (PDF) (7 pp, 404K)

Kansas City Power and Light Co. - Montrose Power Station (PDF) (4 pp, 219K)

Kentucky Utiliites Co. and Louisville Gas and Electric Co. - All Facilities (PDF) (19 pp, 742K)
L

Lansing Board of Water and Light - Erickson Power Station (PDF) (3 pp, 172K)

Lower Colorado River Authority - Fayette Power Project Power Station (PDF) (9 pp, 407K)

Lower Colorado River Authority - Fayette Power Project Power Station, Additional Impoundment (PDF)

(3 pp, 191K)

M

MidAmerican Energy Co. - George Neal North Power Station (PDF) (13 pp, 687K)

MidAmerican Energy Co. - Louisa Power Station (PDF) (5 pp, 301K)

MidAmerican Energy Co. - Riverside Power Station (PDF) (8 pp, 539K)

MidAmerican Energy Co. - Walter Scott Junior Energy Center (PDF) (10 pp, 521K)

Minnkota Power Coop Inc. - Milton R Young Power Station (PDF) (9 pp, 677K)

Mississippi Power - Plant Jack Watson (PDF) (5 pp, 289K)

N

Northern Indiana Public Service Co. (PDF) (3 pp, 143K)

Northern Indiana Public Service Co. - RM Schahfer Power Station (PDF) (8 pp, 485K)

Northern States Power Co. - All Facilities (PDF) (21 pp, 952K)

NRG Energy Center Dover LLC - Dover Facility (PDF) (5 pp, 313K)

NRG Dunkirk Power LLC - Dunkirk Electric Generating Station (PDF) (10 pp, 1.0MB)

NRG Huntley Power LLC - Huntley Electric Generating Station (PDF) (10 pp, 1.2MB)

NRG Indian River Power LLC - Indian River Generating Station (PDF) (8 pp, 503K)

NRG Somerset Power LLC - Somerset Electric Generating Station (PDF) (14 pp, 805K)

NRG Texas Power LLC - Limestone Generating Station (PDF) (16 pp, 1.1MB)

NRG Texas Power LLC - Parish Electric Generating Station (PDF) (7 pp, 533K)

Louisiana Generating LLC - Big Cajun 2 Power Station (PDF) (10 pp, 595K)

O

Ohio Valley Electric Corp. - Kyger Creek Power Station (PDF) (4 pp, 183K)

P

PacifiCorp Energy - Jim Bridger Power Station (PDF) (15 pp, 625K)

PacifiCorp Energy - Dave Johnston Power Station (PDF) (44 pp, 1.6MB)

PacifiCorp Energy - Naughton Power Station (PDF) (24 pp, 907K)

PacifiCorp Energy - Wyodak Power Station (PDF) (10 pp, 409K)

Platte River Power Authority - Rawhide Power Station (PDF) (5 pp, 224K)

PowerSouth Energy Cooperative - Charles R Lowman Power Station (PDF) (5 pp, 231K)

PPL Generation, LLC - PPL Brunner Island Power Station (PDF) (11 pp, 482K)

PPL Montana, LLC - Colstrip Steam Electric Station (PDF) (32 pp, 1.9MB)

PPL Generation, LLC - PPL Holtwood Power Station (PDF) (4 pp, 168K)

PPL Generation, LLC - PPL Martins Creek Power Station (PDF) (8 pp, 390K)

PPL Generation, LLC - PPL Montour Power Station (PDF) (17 pp, 786K)

Progress Energy - Corporate Response Letter (PDF) (2 pp, 82K)

Progress Energy - Asheville Power Station (PDF) (6 pp, 1.1MB)

Progress Energy - Cape Fear Power Station (PDF) (7 pp, 304K)

Progress Energy - Lee Power Station (PDF) (4 pp, 173K)

Progress Energy - L.V. Sutton Power Station (PDF) (6 pp, 232K)

Progress Energy - Mayo Power Station (PDF) (4 pp, 176K)

Progress Energy - Robinson Power Station (PDF) (4 pp, 168K)
Progress Energy - Roxboro Power Station (PDF) (8 pp, 292K)

Progress Energy - W.H. Weatherspoon Power Station (PDF) (7 pp, 201K)

Q - no entries 

R - no entries 

S

Salt River Proj Ag I&P Dist - Coronado Power Station (PDF) (9 pp, 406K)

SCG&E - Wateree Generating Station (PDF) (6 pp, 521K)

SCG&E - Urquhart Generating Station (PDF) (6 pp, 304K)

Santee Cooper (South Carolina Pub Serv Auth) - All Facilities (PDF) (21 pp, 1.1MB)

South Carolina Electric and Gas Co. - Canadys Steam Power Station (PDF) (6 pp, 395K)

Sunbury Generation LLC - WPS Energy Services Sunbury Gnerating Station (PDF) (3 pp, 191K)

T

Tampa Electric Co. - Big Bend Power Station (PDF) (4 pp, 190K)

Tennessee Valley Authority - All Facilities (PDF) (8 pp, 377K)

Tennessee Valley Authority - Hazard Potential (PDF) (3 pp, 68K)

Tennessee Valley Authority - TVA EPA Certification Form (PDF) (1 pg, 49K)

Tennessee Valley Authority - Response to Richard Kinch (PDF) (2 pp, 25K)

Tri-State Generation and Transmission Association, Inc., Craig Power Station (PDF) (4 pp, 412K)

Tri-State Generation and Transmission Association Inc. - Escalante Power Station (PDF) (7 pp, 379K)

Tri-State Generation and Transmission Association, Inc., Nucla Power Station (PDF) (4 pp, 314K)

U - no entries

V

Vectren - AB Brown Power Station and FB Culley Power Station (PDF) (9 pp, 644K)

W

Western Farmers Electric Cooperative (WFEC) - Hugo Power Station (PDF) (7 pp, 583K)

Western Kentucky Energy - Coleman Station (PDF) (3 pp, 207K)

Western Kentucky Energy - Green Station and Reid/HMP&L Station II (PDF) (3 pp, 191K)

Westar Energy - Jeffrey Energy Center (PDF) (6 pp, 361K)

Westar Energy - Lawrence Energy Center (PDF) (6 pp, 350K)

Westar Energy - Tecumseh Energy Center (PDF) (5 pp, 316K)

X

Xcel Energy - All Facilities (PDF) (50 pp, 2.4MB)

Y - no entries

Z - no entries