Summary Table for Impoundment Reports (April 10, 2013)

http://www.epa.gov/osw/nonhaz/industrial/special/fossil/surveys2/index.htm

Company Facility Location Round

Survey Unit Name (Link

to existing DB) Assessment Unit Name

Hazard Rating from Survey

Database

State or Company

Equivalent Hazard

Potential Classification

Contractor-determined

Hazard Potential

Classification (if

different)*

EPA Condition

Assessment Comments/Notes

Alabama Power Company Gorgas Steam Plant Parrish, AL 1

Ash Pond (NID #1198)

Rattlesnake Dam Rattlesnake Dam Significant N/A Significant Satisfactory

Alabama Power Company Gorgas Steam Plant Parrish, AL 1 Gypsum Pond Gypsum Ponds None N/A Significant Satisfactory

American Electric Power Tanner Creek Power Plant Lawrenceburg, IN 1 Bottom Ash Complex Bottom Ash Complex Significant

Significant (Company), Low

(State) Significant Fair

American Electric Power

General James Gavin Power

Plant Cheshire, OH 1 Bottom Ash Pond Bottom Ash Pond High High (State) - Fair

American Electric Power

General James Gavin Power

Plant Cheshire, OH 1 Fly Ash Pond Stingy Run Dam High High (State) - Fair

American Electric Power Tanner Creek Power Plant Lawrenceburg, IN 1 Fly Ash Pond Fly Ash Pond High

High (Company), Low

(State) Significant Satisfactory

Arizona Public Service Four Corners Power Plant Fruitland, NM 1 Lined Ash Impoundment Lined Ash Impoundment Significant Significant (State) Significant Satisfactory

Arizona Public Service Four Corners Power Plant Fruitland, NM 1 Lined Water Impoundment

Lined Decant Water

Impoundment Significant Significant (State) Significant Satisfactory

Duke Energy Buck Steam Station Spencer, NC 1 New Primary Pond Basin 1 (New Dike) High High (State) Significant Satisfactory

Duke Energy Buck Steam Station Spencer, NC 1 Primary Pond Basin 2 (Main Dike) High High (State) Significant Satisfactory

Duke Energy Dan River Eden, NC 1 Primary Pond Primary Pond High High (State) Significant Fair

Duke Energy Buck Steam Station Spencer, NC 1 Secondary Pond Basin 3 (Diverter Dike) High N/A Significant Satisfactory

Duke Energy Dan River Eden, NC 1 Secondary Pond Secondary Pond High High (State) Significant Fair

Duke Energy Allen Steam Station Belmont, NC 1 Active Ash Pond East Dike High High (State) Significant Satisfactory

Duke Energy Marshall Steam Station Catawba County, NC 1 Active Ash Pond Coal Ash Retention Dam High High (State) Significant Fair

Duke Energy Allen Steam Station Belmont, NC 1

North Dike (Add this unit to

DB) North Dike High (State) Significant Satisfactory

Duke Energy Riverbend Steam Station Mt. Holly, NC 1 Primary Pond Primary Ash Pond High High (State) Significant Satisfactory

The diverter dike between the primary and

secondar ash pond is built on top of coal

combustion residual material.

Duke Energy Riverbend Steam Station Mt. Holly, NC 1 Secondary Pond Secondary Ash Pond High High (State) - Satisfactory

Dynegy Midwest Generation,

Inc. Havana Power Plant Havana, IL 1 East Ash Pond East Ash Pond System High High (State) - Satisfactory

Dynegy Midwest Generation,

Inc. Wood River Power Station Alton, IL 1 East Ash Pond (2 cells) East Ash Pond System High High (State) - Satisfactory

Dynegy Midwest Generation,

Inc. Wood River Power Station Alton, IL 1

West Ash Pond (2 cells)

Cells 2E and 3 West Ash Pond System Low Low (State) - Satisfactory

E.ON - Louisville Gas &

Electric - Trimble County Station Bedford, KY 1 Ash Pond Bottom Ash Pond Significant Significant (State) - Satisfactory

Georgia Power Company Plant Bowen Cartersville, GA 1 Ash Pond Plant Bowen Ash Pond Low Category II (State) Significant Satisfactory

Ohio Valley Electric CorporationIndiana Kentucky Electric

Corporation

Clifty Creek Generating

Plant Madison, IN 1

Add this unit to database;

this unit appears to be

combined with West Boiler

Slag Pond in DB) South Fly Ash Pond Dam Significant (State) Significant Satisfactory

Ohio Valley Electric CorporationIndiana Kentucky Electric

Corporation

Clifty Creek Generating

Plant Madison, IN 1 West Boiler Slag Pond West Bottom Ash Pond Dam Significant N/A Significant Satisfactory

PacifiCorp Energy Jim Bridger Power Station Point of Rocks, WY 1 FGD Pond #1 FGD Pond 1 Significant Significant (State) - Fair

PacifiCorp Energy Jim Bridger Power Station Point of Rocks, WY 1 FGD Pond #2 FGD Pond 2 Significant Significant (State) - Fair

PPL Montana Colstrip Power Plant Colstrip, MT 1 Units 1 & 2 A Pond Units 1 & 2 "A" Fly Ash Pond Significant Significant (company) - Fair

PPL Montana Colstrip Power Plant Colstrip, MT 1

Units 1 & 2 Bottom Ash

Pond Units 1 & 2 Bottom Ash Ponds Significant Significant (company) - Fair

PPL Montana Colstrip Power Plant Colstrip, MT 1

Units 1 & 2 Stage

Evaporation Ponds (STEP)

Units 1 & 2 Stage Two

Evaporation Pond High High (company) - Fair

PPL Montana Colstrip Power Plant Colstrip, MT 1

Units 3 & 4 Effluent

Holding Pond (EHP)

Units 3 & 4 Effluent Holding

Ponds Low Low (company) Significant Fair

Progress Energy Cape Fear Plant Moncure, NC 1

1956 Ash Pond (Add this

unit to DB) 1956 Ash Pond N/A Significant Poor

Progress Energy Cape Fear Plant Moncure, NC 1

1963 Ash Pond (Add this

unit to DB) 1963 Ash Pond Low (Company) Significant Poor

Progress Energy Asheville Electric Plant

Buncombe County,

NC 1 1964 Pond 1964 Pond High High (Company) - Poor

Progress Energy Cape Fear Plant Moncure, NC 1 1970 Pond 1970 Ash Pond Low Low (Company) Significant Poor

Progress Energy Cape Fear Plant Moncure, NC 1 1978 Pond 1978 Ash Pond Significant Significant (State) Significant Poor

Progress Energy Asheville Electric Plant

Buncombe County,

NC 1 1982 Pond 1982 Pond High High (Company) - Satisfactory

Page 1 of 19
Company Facility Location Round

Survey Unit Name (Link

to existing DB) Assessment Unit Name

Hazard Rating from Survey

Database

State or Company

Equivalent Hazard

Potential Classification

Contractor-determined

Hazard Potential

Classification (if

different)*

EPA Condition

Assessment Comments/Notes

Progress Energy Mayo Generating Plant Roxboro, NC 1 1982 Pond Mayo Ash Pond Significant Significant (Company) - Satisfactory

Progress Energy Cape Fear Plant Moncure, NC 1 1985 Pond 1985 Ash Pond Significant Significant (State) Significant Poor

Tri-State

Escalante Generating

Station McKinley County, NM 1 N/A

There are no coal combustion waste

impoundments on-site. Impoundments on-site are

for temporary storage of scrubber sludge to

facilitate drying and wastewater evaporation. Coal

combustion waste is disposed of in the on-site

landfill. Most fly ash is shipped off site as

commercial product. This facility was flagged for

assessment based on the hazard ratings and

survey responses for units thought to be used for

disposal of wet CCWs. On-site assessment

revealed that no unit met the criteria for

assessment.

Vectren

A.B. Brown Generating

Station Posey County, IN 1 Lower Dam Lower Ash Pond Dam Significant Significant (State) Significant Fair

Vectren

A.B. Brown Generating

Station Posey County, IN 1 Upper Dam Upper Ash Pond Dam None N/A Significant Satisfactory

Westar Energy Jeffrey Energy Center

Pottawatomie County,

KS 1 Bottom Ash Lake Dam Bottom Ash Lake Dam Significant Significant (State) - Fair

Westar Energy Jeffrey Energy Center

Pottawatomie County,

KS 1 Bottom Ash Pond Dam Bottom Ash Pond Dam None Low (State) - Fair

American Electric Power John E Amos St Albans, WV 2 Bottom Ash Complex

John Amos Bottom Ash Pond

Complex Significant Significant (State) Significant Satisfactory

American Electric Power John E Amos St Albans, WV 2 Fly Ash Pond John Amos Fly Ash Dam High High (State) High Satisfactory

American Electric Power Mitchell Moundsville, WV 2 Bottom Ash Complex

Bottom Ash Complex (Bottom

Ash Pond and Clear Water

Pond) Significant Significant (Company) Significant Satisfactory

American Electric Power Mitchell Moundsville, WV 2 Fly Ash Pond

Conner Run Dam (Fly Ash

Pond) High High (Company) High Satisfactory

American Electric Power Mountaineer New Haven, WV 2 Bottom Ash Complex Bottom Ash Complex Significant

Significant (Company and

State) Significant Satisfactory

American Electric Power Philip Sporn New Haven, WV 2 Bottom Ash Pond Bottom Ash Pond Significant

Significant (State and

Company) Significant Fair

American Electric Power Philip Sporn New Haven, WV 2 Fly Ash Pond Fly Ash Pond High High (Company), Significant Fair

American Electric Power Cardinal Brilliant, OH 2 Bottom Ash Complex

Bottom Ash Complex (Bottom

Ash Pond and Recirculation

Pond) Significant Significant (State) Significant Fair

Contractor recommends AEP-Cardinal perform a

Liquidfaction Analysis on Bottom Ash Pond And

Recirculation Pond

American Electric Power Cardinal Brilliant, OH 2 Fly Ash Reservoir 2 Fly Ash Reservoir No. 2 High High (State) High Satisfactory

American Electric Power Cardinal Brilliant, OH 2

Fly Ash Reservoir No. 1

(Decomissioned in 1991)

(Add this unit to DB)

Fly Ash Reservoir No. 1

(Decomissioned in 1991) High (State) Low Satisfactory

Arizona Electric Pwr Coop Inc Apache Cochise, AZ 2 Ash Pond 1 Ash Pond 1 High High (State) High Satisfactory

Arizona Electric Pwr Coop Inc Apache Cochise, AZ 2 Ash Pond 2 Ash Pond 2 High High (State) High Satisfactory

Arizona Electric Pwr Coop Inc Apache Cochise, AZ 2 Ash Pond 3 Ash Pond 3 High High (State) High Satisfactory

Arizona Electric Pwr Coop Inc Apache Cochise, AZ 2 Ash Pond 4 Ash Pond 4 High High (State) High Satisfactory

Arizona Electric Pwr Coop Inc Apache Cochise, AZ 2 Evaporation 1 Evaportation Pond High High (State) High Satisfactory

Arizona Electric Pwr Coop Inc Apache Cochise, AZ 2 Scrubber Pond 1 Scrubber Sludge Pond 1 High High (State) High Satisfactory

Arizona Electric Pwr Coop Inc Apache Cochise, AZ 2 Scrubber Pond 2 Scrubber Sludge Pond 2 High High (State) High Satisfactory

Arizona Public Service Co Cholla Joseph City, AZ 2 Bottom Ash Pond Bottom Ash Pond Dam High High (State) High Satisfactory

Arizona Public Service Co Cholla Joseph City, AZ 2 Fly Ash Pond Fly Ash Pond Dam High High (State) High Satisfactory

Big Rivers (Recently bought

from Western KY) Reid/Green/HMPL Robards, KY 2 Ash Pond Reid/HMPL Ash Pond Significant Significant (State) Significant Fair

Big Rivers (Recently bought

from Western KY) Reid/Green/HMPL Robards, KY 2

Green Ash Pond (add to

database) Green Ash Pond Low (State) Low Fair

Duke Energy Belews Creek Walnut Cove, NC 2 Active Ash Pond Ash Basin High High (Company) High Fair

Contractor recommends updating hydrologic and

hydraulic analysis

First Energy Generation Corp Bruce Mansfield Shipping Port, PA 2

East HDS

(Decommissioned in 2003)

(Add this unit to DB)

East HDS (Decommissioned in

2003) N/A N/A N/A

First Energy Generation Corp Bruce Mansfield Shipping Port, PA 2 North LDS Pond (N-LDS) North LDS Pond Significant High (State) Significant Satisfactory

First Energy Generation Corp Bruce Mansfield Shipping Port, PA 2 South LDS Pond (S-LDS)

South Low Dissolved Solids

(LDS) Pond Significant High (State) Significant Satisfactory

Page 2 of 19
Company Facility Location Round

Survey Unit Name (Link

to existing DB) Assessment Unit Name

Hazard Rating from Survey

Database

State or Company

Equivalent Hazard

Potential Classification

Contractor-determined

Hazard Potential

Classification (if

different)*

EPA Condition

Assessment Comments/Notes

First Energy Generation Corp Bruce Mansfield Shipping Port, PA 2

West HDS Pond (WHPDS)West High Dissolved Solids

(HDS) Pond Significant High (State) Significant Satisfactory

Louisville Gas & Electric Co. Mill Creek Louisville, KY 2 Ash Pond Ash Pond Significant Significant (State) High Fair

Northern States Sherburne County Becker, MN 2 Bottom Ash Pond Bottom Ash Pond Significant Significant (State) Significant Satisfactory

Northern States Sherburne County Becker, MN 2 Pond No. 1 Pond No. 1 Low Low (Company) Low Satisfactory Pond No. 1 is going through final closure

Northern States Sherburne County Becker, MN 2 Pond No. 2 Pond No. 2 Significant Significant (State) Significant Satisfactory

Northern States Sherburne County Becker, MN 2 Pond No. 3 Pond No. 3 Significant Significant (State) Significant Satisfactory

PacifiCorp Naughton Kemmerer, WY 2 FGD Pond #1 FGD #1 Pond None Not classified (State) Significant Satisfactory

PacifiCorp Naughton Kemmerer, WY 2 FGD Pond #2 FGD #2 Pond Significant Significant (State) Significant Satisfactory

PacifiCorp Naughton Kemmerer, WY 2 North Ash Pond North Ash Pond Low Low (State) Significant Satisfactory

PacifiCorp Naughton Kemmerer, WY 2 South Ash Pond South Ash Pond Low Low (State) Significant Satisfactory

PPL Generation Martins Creek Bangor, PA 2 Ash Basin 4

Ash Basin No. 4 (Closure plan

under review by state) Significant High (State) High Satisfactory

PPL Generation Martins Creek Bangor, PA 2

Ash Basin No. 1 (Closure

plan under review by state;

can be added to DB)

Ash Basin No. 1 (Closure plan

under review by state) Low (State) Low Satisfactory

PPL Generation Martins Creek Bangor, PA 2

Ash Basin No. 2 (unit

closed, can still add to DB) Ash Basin No. 2

Closed with soil cap (1979),

not regulated by state. - - Ash Basin no.2 closed 1979

PPL Generation Martins Creek Bangor, PA 2

Ash Basin No. 3 (unit

closed, can still add to DB) Ash Basin No. 3

Closed with soil cap (late

1980s), not regulated by

state. - - Ash Basin no.3 closed late 1980s

Progress Energy Roxboro Person County, NC 2 Ash Pond West Ash Pond Significant Significant (Company) Significant Satisfactory

Progress Energy Roxboro Person County, NC 2 FGD Flush Pond FGD Flush Pond Significant Significant (Company) Significant Fair FGD Ponds are located within Ash pond

Progress Energy Roxboro Person County, NC 2 FGD Settling Pond FGD Settling Pond Significant Significant (Company) Significant Fair

Salt River Project Coronado St Johns, AZ 2 Evaporation Pond/Dam Evaporation Pond Dam Significant Significant (State) Significant Satisfactory

AEP Big Sandy Louisa, KY 3 Bottom Ash Complex Bottom Ash Complex Low Low Significant Fair

AEP Big Sandy Louisa, KY 3 Fly Ash

Fly Ash Ponds (Horseford Run

Dam and Saddle Dam) High High (State) - Satisfactory

Pond built with compacted clay. Operating under

conditions of expired NPDES permit.

AEP Conesville Power Station Conesville, OH 3 Ash Pond Complex Ash Pond complex Significant Significant Significant Fair

AEP Muskingum River Waterford, OH 3 Middle Fly Ash Pond Middle Fly Ash Reservoir Dams High High (State) High Fair Embankment material: clay and bottom ash.

AEP Muskingum River Waterford, OH 3 Unit 1-4 Boiler Slag Pond Units 1-4 Bottom Ash Pond Dam Low Significant (State) Significant Poor

AEP Muskingum River Waterford, OH 3

Unit 5 Bottom Ash Pond

(Lower Fly Ash Pond) Lower Fly Ash Reservoir Dam High High (State) High Fair Embankment material: earth and bottom ash.

AEP Muskingum River Waterford, OH 3 Upper Fly Ash Pond

Upper Fly Ash Reservoir Dams

(Mill Stone Creek, No-Name

Creek, Wing, Spillway, and

Freeboard Dams) High High (State) High Satisfactory Embankment material: clay and bottom ash.

Alleghany Energy Pleasants Power Willow Island, WV 3

McElroy's Run

Embankment McElroy's Run Dam High High (State) High Fair

There are two other impoundments on-site that

collect storm water run-off and leachate.

Alleghany Energy R Paul Smith Station

Facility- Williamsport,

MD, Ponds- Falling

Waters, WV 3 Lagoon Dam #3 Ash pond # 3 Significant Significant Significant Satisfactory

Alleghany Energy R Paul Smith Station

Facility- Williamsport,

MD, Ponds- Falling

Waters, WV 3 Lagoon Dam #4 Ash pond # 4 Significant Significant Significant Satisfactory

Big Rivers Coleman Hawesville, KY 3 Ash Pond Active Ash Pond A Significant Significant (State) Significant Fair

Big Rivers Coleman Hawesville, KY 3 South Ash Pond Inactive Ash Pond C Less than low - Significant Fair

Dayton Light & Power Co JM Stuart Station Aberdeen, OH 3 Pond #10 Ash Pond 10 Significant Significant Significant Satisfactory

Dayton Light & Power Co JM Stuart Station Aberdeen, OH 3 Pond #3A Ash Pond 3A None Significant Significant Fair

No doumentation provied to contractor on stability

analysis or soil characteristics.

Dayton Light & Power Co JM Stuart Station Aberdeen, OH 3 Pond #5 Ash Pond 5 None Significant Significant Poor

Dayton Light & Power Co JM Stuart Station Aberdeen, OH 3 Pond #6 Ash Pond 6 None Significant Significant Poor

Dayton Light & Power Co JM Stuart Station Aberdeen, OH 3 Pond #7 Ash Pond 7/7a None Significant Significant Poor

Duke Energy Miami Fort Station North Bend, OH 3 Ash Pond A Ash Pond A Significant Significant (State) Significant Fair

Duke Energy Miami Fort Station North Bend, OH 3 Ash Pond B Ash Pond B Significant Significant (State) Significant Fair Facility monitors groundwater wells

Duke Energy WC Beckjord Station New Richmond, OH 3

Ash Pond A (add to

database, Pond A inactive

since 1985) Ash Pond A N/A Significant Poor Pond A inactive since 1985

Page 3 of 19
Company Facility Location Round

Survey Unit Name (Link

to existing DB) Assessment Unit Name

Hazard Rating from Survey

Database

State or Company

Equivalent Hazard

Potential Classification

Contractor-determined

Hazard Potential

Classification (if

different)*

EPA Condition

Assessment Comments/Notes

Duke Energy WC Beckjord Station New Richmond, OH 3 Ash Pond B Ash Pond B Significant Significant (State) Significant Poor

Duke Energy WC Beckjord Station New Richmond, OH 3 Ash Pond C Ash Pond C Significant Significant (State) Significant Poor

Duke Energy WC Beckjord Station New Richmond, OH 3 Ash Pond C extension Ash Pond C extension Significant Significant (State) Significant Poor

pond C extension no longer receiving ash- has

groundwater monitoring wells outside of

embankment

E.ON - Kentucky Utilities EW Brown Harrodsburg, KY 3 Ash Pond Main Ash Pond High High (State) High Satisfactory

Currently drained and out of service; construction

underway for expansion of facility.

E.ON - Kentucky Utilities EW Brown Harrodsburg, KY 3 Auxiliary Pond Auxiliary Ash Pond High High (State) High Satisfactory

E.ON - Kentucky Utilities Ghent Facility Ghent, KY 3 Ash Pond Basin 1 Ash Treatment Basin #1 High High (State) High Satisfactory

E.ON - Kentucky Utilities Ghent Facility Ghent, KY 3 Ash Pond Basin 2 Ash Treatment Basin #2 High High (State) High Satisfactory

E.ON - Kentucky Utilities Ghent Facility Ghent, KY 3

Gypsum Stack

Surge/Reclaim Pond

Gypsum Stack Surge/Reclaim

Pond None Less than low (State) Less than low-incised N/A

E.ON - Kentucky Utilities Ghent Facility Ghent, KY 3 Gypsum Stacking Facility Gypsum Stacking Facility High High (State) High Satisfactory

Under constructions; GW monitoring wells

installed; piezometers will be installed

E.ON - Kentucky Utilities Ghent Facility Ghent, KY 3

Secondary Ash Treatment

Basin Secondary Ash Treatment Basin None Less than low (State) Less than low-incised N/A

E.ON - Louisville Gas &

Electric Cane Run Power Station Louisville, KY 3 Ash Pond

Ash Treatment Basin Complex/EPond High High (State) High Satisfactory

E.ON - Louisville Gas &

Electric Cane Run Power Station Louisville, KY 3 Dead Storage Pond Basin Pond/Dead Storage Pond None - Low Fair Planned decommissioning

First Energy Bruce Mansfield Shipping Port, PA 3 Little Blue Run Dam Little Blue Run Dam High High (State) High Satisfactory

The state of PA wants First Energy to obtain a

new permit for "Little Blue Saddle Dam", an

impoundment that was/is currently considered part

of "Little Blue Run Dam".

Georgia Power Company Plant Branch Milledgeville, GA 3 A Ash Pond A None - Closed N/A

Georgia Power Company Plant Branch Milledgeville, GA 3 B Ash Pond B Significant Category II (State) Significant Fair Further geotech analysis recommended.

Georgia Power Company Plant Branch Milledgeville, GA 3 C Ash Pond C None

Evaluated by state but not

yet classified Significant Satisfactory Further geotech analysis recommended.

Georgia Power Company Plant Branch Milledgeville, GA 3 D Ash Pond D Significant Category II (State) Significant Satisfactory Further geotech analysis recommended.

Georgia Power Company Plant Branch Milledgeville, GA 3 E Ash Pond E High Category I (State) High Satisfactory Further geotech analysis recommended.

Ohio Valley Elec Corp Kyger Creek Station Gallipolis, OH 3 Boiler Slag Pond Bottom Ash Pond Significant Significant (State) High Poor

Ohio Valley Elec Corp Kyger Creek Station Gallipolis, OH 3 South Fly Ash Pond South Fly Ash Pond Significant Significant (State) High Poor

Allete Inc Clay Boswell Power Station Cohasset, MN 4

Central Wastewater

Treatment Pond Waste Water Treatment Pond Significant Significant Significant Poor (8) Height: 0 Ft (below grade)

Allete Inc Clay Boswell Power Station Cohasset, MN 4 Coal Pile Sump Does not contain CCRs N/A N/A N/A N/A Does not contain CCRs

Allete Inc Clay Boswell Power Station Cohasset, MN 4

Inactive Units 1, 2 & 3

Bottom Ash Pond Inactive Bottom Ash Significant Significant Significant Poor

Allete Inc Clay Boswell Power Station Cohasset, MN 4 Unit 3 Fly Ash Pond

Units Combined: Ponds 3,4 and

Bottom ash are one unit Significant Significant Significant Satisfactory

Active Ponds include ponds 3,4 and Bottom ash

as one unit

Allete Inc Clay Boswell Power Station Cohasset, MN 4

Units 1 - 4 Bottom Ash

Pond

Units Combined: Ponds 3,4 and

Bottom ash are one unit Significant Significant Significant Satisfactory

Active Ponds include ponds 3,4 and Bottom ash

as one unit

Allete Inc Clay Boswell Power Station Cohasset, MN 4

Units 1, 2 & 4 Fly Ash and

Scrubber Slurry Pond

Units Combined: Ponds 3,4 and

Bottom ash are one unit Significant Significant Significant Satisfactory

Active Ponds include ponds 3,4 and Bottom ash

as one unit

Ameren Energy Generating Co Joppa Power Station Massac County, IL 4 Ash Pond Ash Pond None None Low Fair

The impoundment is not regulated as a dam by the

Illinois Department of Natural Resources (IDNR),

however, EEI and Ameren voluntarily comply with

IDNR requirements and have developed an

Emergency Action Plan (EAP) and a Dam Safety

Program for the impoundment.

City of Sikeston Sikeston Power Station Sikeston, MO 4 Bottom Ash Pond Bottom Ash None None High Fair did not find any geotech studies

City of Sikeston Sikeston Power Station Sikeston, MO 4 Fly Ash Pond Fly Ash Pond None None Significant Fair

Dominion Possum Point Power Station Dumfries, VA 4 Ash Pond D Ash Pond D Significant Significant Significant Satisfactory impoundment not receiving CCW

Dominion Possum Point Power Station Dumfries, VA 4 Ash Pond E Ash Pond E Significant Significant Significant Fair impoundment not receiving CCW

Dominion Chesapeake Energy Center Chesapeake, VA 4

Bottom Ash/Sedimentation

Pond

Bottom Ash and Sedimentation

Pond None none Significant Poor 2009 2010 engineering report notes urgent actions

Dominion Chesterfield Power Station Chester, VA 4 Lower (Old) Ash Pond Lower (Old) Ash Pond None None Significant Fair

Dominion Bremo Bluff Power Station Bremo Bluff, VA 4 North Ash North Ash Pond Low Significant significant Fair

Page 4 of 19
Company Facility Location Round

Survey Unit Name (Link

to existing DB) Assessment Unit Name

Hazard Rating from Survey

Database

State or Company

Equivalent Hazard

Potential Classification

Contractor-determined

Hazard Potential

Classification (if

different)*

EPA Condition

Assessment Comments/Notes

Dominion Chesterfield Power Station Chester, VA 4 Upper (New) Ash Pond Upper (New) Ash Pond Low Low Low Satisfactory

Dominion Bremo Bluff Power Station Bremo Bluff, VA 4 West Ash west ash pond None none significant Fair new Schnabel 2009 geotech study

Duke Energy Corp Gibson Generating Station Owensville, IN 4 East Ash Pond #1 East Ash Pond #1 None None Low Fair

Duke Energy Corp Gibson Generating Station Owensville, IN 4 East Ash Pond #2 East Ash Pond #2 None None Low Fair

Duke Energy Corp Gibson Generating Station Owensville, IN 4 East Ash Pond #3 East Ash Pond #3 None None Less than low Fair

Duke Energy Corp Gibson Generating Station Owensville, IN 4

East Ash Pond Settling

Basin East Ash Pond Settling Basin None None Low Fair

Duke Energy Corp Gibson Generating Station Owensville, IN 4 North Ash Pond North Ash Pond None None Low Fair

Duke Energy Corp Gibson Generating Station Owensville, IN 4 North Settling Basin North Settling Basin None None Low Fair

Duke Energy Corp Wabash River Power Station Terre Haute, IN 4 Primary Ash Pond Cell A Primary Ash Pond A None None Significant Fair

Currently full of CCW, a channel diverts water

toward Pond B. Embankment has not been raised

since initial construction.

Duke Energy Corp Wabash River Power Station Terre Haute, IN 4 Primary Ash Pond Cell B Primary Ash Pond B None None Significant Fair

Duke Energy Corp Wabash River Power Station Terre Haute, IN 4 Secondary Ash Pond Secondary Ash Pond None None Significant Fair

Duke Energy Corp Wabash River Power Station Terre Haute, IN 4 South Ash Pond South Ash Pond None None Significant Satisfactory

Duke Energy Corp

WH Zimmer Generating

Station Moscow, OH 4 Wastewater Pond Wastewater Pond Complex Significant Class II (State) Low Satisfactory

Georgia Power Co Plant Scherer Juliette, GA 4 Ash Pond Ash Pond Not classified (State) None Significant Satisfactory

rated poor due to lack of design documentation.

NOTE: Georgia Power claiming CBI on all

technical data supplied to contractor

Georgia Power Co Plant Hammond Coosa, GA 4 Ash Pond 1 Ash Pond 1 None Category II (State) Significant Satisfactory

Georgia Power Co Plant McDonough Symra, GA 4 Ash Pond 1 Ash Pond 1 Not classified (State) None Low Satisfactory Pond is inactive and covered

Georgia Power Co Plant Mitchell Albany, GA 4 Ash Pond 1 Ash Pond 1 Significant Category II (State) Low Satisfactory Inactive; no longer receives liquid borne waste.

Georgia Power Co Plant Yates Newnan, GA 4 Ash Pond 1 Ash Pond 1 Not classified (State) None Low Satisfactory

Inactive, does not currently receive CCW (does

receive coal pile run off)

Georgia Power Co Plant Hammond Coosa, GA 4 Ash Pond 2 Ash Pond 2 None Category II (State) Significant Satisfactory

Georgia Power Co Plant McDonough Symra, GA 4 Ash Pond 2 Ash Pond 2 Not classified (State) None Low Satisfactory

Georgia Power Co Plant Mitchell Albany, GA 4 Ash Pond 2 Ash Pond 2 Not classified (State) Category II (State) Significant Satisfactory

Georgia Power Co Plant Yates Newnan, GA 4 Ash Pond 2 Ash Pond 2 Significant Category II (State) Significant Fair

Georgia Power Co Plant Hammond Coosa, GA 4 Ash Pond 3 Ash Pond 3 Not classified (State) None Low Satisfactory

Pond converted to dry disposal area in early

1980s. It is currently full and considered inactive

though does contain some liquids from rainfall

events.

Georgia Power Co Plant McDonough Symra, GA 4 Ash Pond 3 Ash Pond 3 Not classified (State) none Low Satisfactory

Georgia Power Co Plant Yates Newnan, GA 4 Ash Pond 3 Ash Pond 3 Significant Category II (State) Low Satisfactory

Inactive, does act as sediment control for flow from

Ash Pond B'

Georgia Power Co Plant Hammond Coosa, GA 4 Ash Pond 4 Ash Pond 4 None Category II (State) Significant Poor

Dry stacking facility that no longer receives liquidborne material.

Georgia Power Co Plant McDonough Symra, GA 4 Ash Pond 4 Ash Pond 4 High Category I (State) High Satisfactory

Georgia Power Co Plant Mitchell Albany, GA 4 Ash Pond A Ash Pond A Not classified (State) N/A Less than Low N/A

Inactive; no longer receives liquid borne waste;

pond is covered over with asphalt and concrete

Georgia Power Co Plant Yates Newnan, GA 4 B' Pond B' Pond Not classified (State) None Low Satisfactory

Georgia Power Co Plant Yates Newnan, GA 4

Gypsum Solid Waste

Facility Gypsum Pond Not classified (State) None Low Satisfactory

Georgia Power Co Plant Scherer Juliette, GA 4 Not in database Settling Pond Not classified (State) None Low Satisfactory

Settling pond was NOT on the ICR response

NOTE: Georgia Power claiming CBI on all

technical data supplied to contractor

Georgia Power Co Plant Yates Newnan, GA 4 Pond A A Pond Not classified (State) None Less than Low Satisfactory Pond is covered and inactive

Georgia Power Co Plant Yates Newnan, GA 4 Pond B B Pond Not classified (State) N/A Less than Low N/A Pond is covered and inactive

Georgia Power Co Plant Yates Newnan, GA 4 Pond C C Pond Not classified (State) N/A Less than Low N/A Pond is covered and inactive

Indianapolis Power & Light Co

Eagle Valley Generating

Station Martinsville, IN 4 A Pond A Pond None None Significant Poor rated poor due to lack of design documentation.

Indianapolis Power & Light Co

Eagle Valley Generating

Station Martinsville, IN 4 B Pond B Pond None None Significant Poor rated poor due to lack of design documentation.

Indianapolis Power & Light Co

Eagle Valley Generating

Station Martinsville, IN 4 C Pond C Pond None None Significant Poor rated poor due to lack of design documentation.

Indianapolis Power & Light Co

Eagle Valley Generating

Station Martinsville, IN 4 D Pond D Pond None None High Poor rated poor due to lack of design documentation.

Indianapolis Power & Light Co

Eagle Valley Generating

Station Martinsville, IN 4 E Pond E Pond None None Significant Poor rated poor due to lack of design documentation.

Page 5 of 19
Company Facility Location Round

Survey Unit Name (Link

to existing DB) Assessment Unit Name

Hazard Rating from Survey

Database

State or Company

Equivalent Hazard

Potential Classification

Contractor-determined

Hazard Potential

Classification (if

different)*

EPA Condition

Assessment Comments/Notes

Indianapolis Power & Light Co

Harding Street Power

Station Indianapolis, IN 4 Not in database Ponds 4A/4B None None Low Poor rated poor due to lack of design documentation.

Indianapolis Power & Light Co

Harding Street Power

Station Indianapolis, IN 4 Pond 1 Pond 1 None None Significant Poor rated poor due to lack of design documentation.

Indianapolis Power & Light Co

Harding Street Power

Station Indianapolis, IN 4 Pond 2 Pond 2 None None High Poor rated poor due to lack of design documentation.

Indianapolis Power & Light Co

Harding Street Power

Station Indianapolis, IN 4 Pond 3 Pond 3 None None Significant Poor rated poor due to lack of design documentation.

Indianapolis Power & Light Co

Harding Street Power

Station Indianapolis, IN 4 Pond 4 Pond 4 None None High Poor rated poor due to lack of design documentation.

Indianapolis Power & Light Co

Petersburg Generating

Station Petersburg, IN 4 Pond A - Active Pond A - Active None None Significant Poor rated poor due to lack of design documentation.

Indianapolis Power & Light Co

Petersburg Generating

Station Petersburg, IN 4 Pond A - Discharge Pond A - Discharge None None Significant Poor rated poor due to lack of design documentation.

Indianapolis Power & Light Co

Petersburg Generating

Station Petersburg, IN 4 Pond B Pond B None None Significant Poor rated poor due to lack of design documentation.

Indianapolis Power & Light Co

Petersburg Generating

Station Petersburg, IN 4 Pond C Pond C None None Significant Poor rated poor due to lack of design documentation.

Indianapolis Power & Light Co

Harding Street Power

Station Indianapolis, IN 4 Ponds 2A/2B Ponds 2A/2B None None Low Poor rated poor due to lack of design documentation.

Northern Indiana Pub Serv Co

R. M. Schahfer Power

Station Wheatfield, IN 4

FGD Landfill Stormwater

Runoff Pond

FGD Landfill Stormwater Runoff

Pond None None Low Poor

Northern Indiana Pub Serv Co

R. M. Schahfer Power

Station Wheatfield, IN 4 Final Settling Basin Final Settling Basin None None High Poor

Northern Indiana Pub Serv Co

R. M. Schahfer Power

Station Wheatfield, IN 4

Material Storage Runoff

Basin Material Storage Runoff Basin None None Significant Poor

Northern Indiana Pub Serv Co

R. M. Schahfer Power

Station Wheatfield, IN 4

Metal Cleaning Waste

Basin Metal Cleaning Waste Basin None None Significant Poor

Northern Indiana Pub Serv Co

R. M. Schahfer Power

Station Wheatfield, IN 4 Not in database Intake Settling Basin None High Poor

Northern Indiana Pub Serv Co

R. M. Schahfer Power

Station Wheatfield, IN 4 Not in database Gypsum Storage A None Significant Poor

On same site as original Waste Disposal Area;

backfilled, but still used as a gypsum storage

facility.

Northern Indiana Pub Serv Co

R. M. Schahfer Power

Station Wheatfield, IN 4 Not in database Gypsum Storage B None Significant Poor

On same site as original Waste Disposal Area;

backfilled, but still used as a gypsum storage

facility.

Northern Indiana Pub Serv Co

R. M. Schahfer Power

Station Wheatfield, IN 4 Recycle Basin Recycling Settling Basin None None Significant Poor

Northern Indiana Pub Serv Co

R. M. Schahfer Power

Station Wheatfield, IN 4 Waste Disposal Area Waste Disposal Area None None Significant Poor

Original Waste Disposal Area (along with Dry Ash

Staging Area) was constructed in 1976, backfilled

and taken out of service in 1982, though not

formally decommissioned.

Northern Indiana Pub Serv Co

R. M. Schahfer Power

Station Wheatfield, IN 4

Yard Drain Stormwater

Retention Pond

Yard Drain Stormwater Retention

Pond None None Low Poor Incised

Sunbury Generation LLC

WPS Energy Services

Sunbury Generating Station Shamokin Dam, PA 4

Residual Waste Ash Basin

No. 1 Residual Waste Ash Basin No. 1 None None High Poor

Impoundment has closure plan, but not state

approved.

Alabama Power Co

Greene County Power

Station Demopolis, AL 5 Ash Pond Fly Ash Pond None None Significant Satisfactory Embankment may contain a strata of fly ash.

Alabama Power Co

Ernest C. Gaston Electric

Generating Plant Wilsonville, AL 5 Ash Pond Dam West Dike None None High Satisfactory

Contractor divided the impoundment into 3 dikesNorth, East and West.

Alabama Power Co

Ernest C. Gaston Electric

Generating Plant Wilsonville, AL 5 Ash Pond Dam East Dike None None Significant Satisfactory

Contractor divided the impoundment into 3 dikesNorth, East and West.

Alabama Power Co

Ernest C. Gaston Electric

Generating Plant Wilsonville, AL 5 Ash Pond Dam North Dike None None Significant Satisfactory

Contractor divided the impoundment into 3 dikesNorth, East and West.

Alabama Power Co Barry Power Station Bucks, AL 5 Barry Ash Pond Barry Ash Pond None None Significant Satisfactory

American Electric Power

Southwestern Electric Power

Co - Welsh Plant Pittsburg, TX 5 Active Bottom Ash Storage Active Bottom Ash Storage None None Low Satisfactory

Rated POOR based on the lack of critical studies

and investigations available to the assessors to

determine the structural soundness of the dams

and potential for dam safety deficiencies.

American Electric Power

Southwestern Electric Power

Co - Welsh Plant Pittsburg, TX 5 Primary Ash Pond Primary Ash Pond None None Low Satisfactory

Rated POOR based on the lack of critical studies

and investigations available to the assessors to

determine the structural soundness of the dams

and potential for dam safety deficiencies.

Page 6 of 19
Company Facility Location Round

Survey Unit Name (Link

to existing DB) Assessment Unit Name

Hazard Rating from Survey

Database

State or Company

Equivalent Hazard

Potential Classification

Contractor-determined

Hazard Potential

Classification (if

different)*

EPA Condition

Assessment Comments/Notes

American Electric Power

Southwestern Electric Power

Co - Welsh Plant Pittsburg, TX 5 Secondary Ash Pond Secondary Ash Pond None None Low Satisfactory

Rated POOR based on the lack of critical studies

and investigations available to the assessors to

determine the structural soundness of the dams

and potential for dam safety deficiencies.

Cleco Power LLC Rodemacher Power Station Lena, LA 5 Bottom Ash Pond Bottom Ash Pond None None Significant Poor

Units appear to be in fair condition based on site

observation, but rated poor due to lack of design

documentation.

Cleco Power LLC Rodemacher Power Station Lena, LA 5 Fly Ash Pond Fly Ash Pond None None Significant Poor

Units appear to be in fair condition based on site

observation, but rated poor due to lack of design

documentation.

Cleco Power LLC Rodemacher Power Station Lena, LA 5 Not in database Leachate Pond None Low Poor

Units appear to be in fair condition based on site

observation, but rated poor due to lack of design

documentation.

Coleto Creek Power, LP Coleto Creek Power Station Fannin, TX 5 Primary Ash Pond Primary Ash Pond None None Low Poor

Units appear to be in fair condition based on site

observation, but rated poor due to lack of design

documentation.

Coleto Creek Power, LP Coleto Creek Power Station Fannin, TX 5 Secondary Ash Pond Secondary Ash Pond None None Low Poor

Units appear to be in fair condition based on site

observation, but rated poor due to lack of design

documentation.

Duke Energy Corp W. S. Lee Power Station Pelzer, SC 5 Primary Active Ash Pond Primary Active Ash Pond None None Significant Fair

Duke Energy Corp W. S. Lee Power Station Pelzer, SC 5 Secondary Ash Pond Secondary Ash Basin None None Significant Fair

Georgia Power Co Plant Wansley Carrolton, GA 5 Ash Pond Ash Pond Low Category II (State) Low Satisfactory

Slope stability analyses were not provided for the

western dike.

Gulf Power Lansing Smith Power Station Pensacola, FL 5 Plant Smith Ash Pond Ash Pond None None Low Satisfactory

Louisiana Generating LLC Big Cajun 2 Power Station New Roads, LA 5 Bottom Ash Unit Bottom Ash Pond None None Low Fair

Louisiana Generating LLC Big Cajun 2 Power Station New Roads, LA 5 Fly Ash Unit Fly Ash Pond None None Low Fair

Louisiana Generating LLC Big Cajun 2 Power Station New Roads, LA 5 Water Treatment Unit Water Treatment Ponds None None Low Fair

Lower Colorado River Authority

Fayette Power Project

Power Station La Grange, TX 5 Management Unit 002 Coal Ash Pond None None Low Satisfactory

Lower Colorado River Authority

Fayette Power Project

Power Station La Grange, TX 5 Management Unit 009 Reclaim Pond None None Low Poor

Unit appears to be in fair condition based on site

observation, but rated poor due to lack of design

documentation.

Mississippi Power Co Plant Jack Watson Gulfport, MS 5 Ash Pond Ash Pond None Low (State) Significant Satisfactory

Power South Energy

Cooperative

Charles R. Lowman Power

Station Leroy, AL 5 FGD Scrubber Waste Pond None None Significant Poor

Units appear to be in fair condition based on site

observation, but rated poor due to lack of design

documentation.

Power South Energy

Cooperative

Charles R. Lowman Power

Station Leroy, AL 5 Not in database Process Waste Pond N/A None Significant Poor

Units appear to be in fair condition based on site

observation, but rated poor due to lack of design

documentation.

Power South Energy

Cooperative

Charles R. Lowman Power

Station Leroy, AL 5 Unit 1 Ash Pond #1 Bottom Ash Pond None None Significant Fair

Power South Energy

Cooperative

Charles R. Lowman Power

Station Leroy, AL 5 Units 2-3 Pond #2/#3 Bottom Ash Ponds None None Significant Poor

Units appear to be in fair condition based on site

observation, but rated poor due to lack of design

documentation.

Santee Cooper (South Carolina

Pub Serv Auth)

Dolphus M. Grainger Power

Station Conway, SC 5 Ash Pond 1 Ash Pond 1 None None Less than low N/A

Used to store dry waste only, continually

dewatered.

Santee Cooper (South Carolina

Pub Serv Auth)

Dolphus M. Grainger Power

Station Conway, SC 5 Ash Pond 2 Ash Pond 2 None None Low Satisfactory Only active impoundment onsite.

Santee Cooper (South Carolina

Pub Serv Auth) Jefferies Power Station Moncks Corner, SC 5 Ash Pond A Ash Pond A None None Significant Fair

Concern: Satisfactor rating, with no

documentation, but significant hazard

Santee Cooper (South Carolina

Pub Serv Auth) Winyah Power Station Georgetown, SC 5 Ash Pond A Ash Pond A None None Low Fair

No construction or geotechnical information given

to contractor

Santee Cooper (South Carolina

Pub Serv Auth) Jefferies Power Station Moncks Corner, SC 5 Ash Pond B Ash Pond B None None Low Fair

Santee Cooper (South Carolina

Pub Serv Auth) Winyah Power Station Georgetown, SC 5 Ash Pond B Ash Pond B None None Low Fair

No construction or geotechnical information given

to contractor

Santee Cooper (South Carolina

Pub Serv Auth) Winyah Power Station Georgetown, SC 5 Slurry Pond 2 Slurry Pond 2 None None Significant Fair

No construction or geotechnical information given

to contractor

Santee Cooper (South Carolina

Pub Serv Auth) Winyah Power Station Georgetown, SC 5 South Ash Pond South Ash Pond None None Significant Fair

No construction or geotechnical information given

to contractor

Santee Cooper (South Carolina

Pub Serv Auth) Winyah Power Station Georgetown, SC 5 Unit 3 & 4 Slurry Pond Unit 3 & 4 Slurry Pond None None Significant Fair

No construction or geotechnical information given

to contractor

Santee Cooper (South Carolina

Pub Serv Auth) Winyah Power Station Georgetown, SC 5 West Ash Pond West Ash Pond None None Significant Fair

No construction or geotechnical information given

to contractor

South Carolina Electric&Gas

Co Wateree Generating Station Eastover, SC 5 Ash Pond 1 Ash Pond 1 None None Low Satisfactory

No data on the embankment material used at

construction, but later core borigs are available

Page 7 of 19
Company Facility Location Round

Survey Unit Name (Link

to existing DB) Assessment Unit Name

Hazard Rating from Survey

Database

State or Company

Equivalent Hazard

Potential Classification

Contractor-determined

Hazard Potential

Classification (if

different)*

EPA Condition

Assessment Comments/Notes

South Carolina Electric&Gas

Co Wateree Generating Station Eastover, SC 5 Ash Pond 2 Ash Pond 2 None None Low Satisfactory

No data on the embankment material used at

construction, but later core borigs are available

Ameren Energy Generating Co

E. D. Edwards Power

Station Bartonville, IL 6 Ash Pond Ash Pond None None Significant Fair

Ameren Energy Generating Co Duck Creek Power Station Canton, IL 6 Ash Pond 1 Fly Ash Pond 1 None Significant (by Company), None by State Low Fair

Ameren Energy Generating Co Duck Creek Power Station Canton, IL 6 Ash Pond 2 Fly Ash Pond 2 None Low- State rating Low Fair

Ameren Energy Generating Co Meredosia Power Station Meredosia, IL 6 Bottom Ash Pond Bottom Ash Pond None None Significant Fair

Ameren Energy Generating Co Meredosia Power Station Meredosia, IL 6 Fly Ash Pond Fly Ash Pond None None Significant Fair

Ameren Energy Generating Co Coffeen Power Station

Montgomery County,

IL 6

Gypsum Management

Facility Recycle Pond Gypsum Reclaim Pond None None Significant Fair

Ameren Energy Generating Co Duck Creek Power Station Canton, IL 6 not in database Recycle Pond Low- State rating Low Fair

Ameren Energy Generating Co

E. D. Edwards Power

Station Bartonville, IL 6 Not in database Cooling Pond None None Significant Fair

Ameren Energy Generating Co

E. D. Edwards Power

Station Bartonville, IL 6 Not in database Clarification Pond None None Significant Fair

Ameren Energy Generating Co Newton Power Station Newton, IL 6 Primary Ash Pond Primary Ash Pond None None Significant Fair

Ameren Energy Generating Co Coffeen Power Station

Montgomery County,

IL 6 Recycle Pond Recycle Pond None None Significant Fair

Ameren Energy Generating Co Newton Power Station Newton, IL 6 Secondary Ash Pond Secondary Ash Pond None None Significant Fair

American Electric Power

IN MI Power Co - Rockport

Power Station Rockport, IN 6 Bottom Ash Complex Bottom Ash Complex None None Low Satisfactory

City of Springfield Dallman Power Station Springfield, IL 6 Dallman Ash Pond Dallman Ash Pond None None Significant Fair

City of Springfield Lakeside Power Station Springfield, IL 6 Lakeside Ash Pond Lakeside Ash Pond Low Low Significant Fair

Dayton Power & Light Co O.H. Hutchings Station Miamisburg, OH 6 East Primary Settling Pond East Primary Settling Pond None None Significant Poor

Dayton Power & Light Co O.H. Hutchings Station Miamisburg, OH 6 Secondary Settling Pond Secondary Settling Pond None None Significant Poor

Dayton Power & Light Co O.H. Hutchings Station Miamisburg, OH 6

West Primary Settling

Pond West Primary Settling Pond None None Significant Poor

Dominion Kincaid Power Station Kincaid, IL 6 Kincaid Slagfield Berm Kincaid Slagfield Berm None None Low Fair

Duke Energy Corp Cayuga Power Station Cayuga, IN 6 Ash Disposal Area #1 Ash Disposal Area #1 None None Significant Poor

Duke Energy Corp East Bend Power Station Rabbit Hash, KY 6 Ash Pond Ash Pond None None Significant Poor

Duke Energy Corp R. Gallagher Power Station New Albany, IN 6 Ash Pond A Ash Pond A None None Significant Fair

Duke Energy Corp East Bend Power Station Rabbit Hash, KY 6 FGD Pond East FGD Pond East None None unit not assessed unit not assessed

Duke Energy Corp East Bend Power Station Rabbit Hash, KY 6 FGD Pond West FGD Pond West None None unit not assessed unit not assessed

Duke Energy Corp Cayuga Power Station Cayuga, IN 6

Lined Ash Disposal Pond -

Cell #1

Lined Ash Disposal Pond - Cell

#1 None None Significant Poor

Duke Energy Corp

Edwardsport Generating

Station Edwardsport, IN 6 Primary Ash Pond Primary Ash Pond None None Significant Fair

Duke Energy Corp Cayuga Power Station Cayuga, IN 6 Primary Ash Settling Basin Primary Ash Settling Basin None None Significant Poor

Duke Energy Corp

Edwardsport Generating

Station Edwardsport, IN 6 Secondary Ash Pond Secondary Ash Pond None None Significant Fair

Duke Energy Corp R. Gallagher Power Station New Albany, IN 6 Secondary Ash Pond Secondary Ash Pond None None Low Fair

Duke Energy Corp Cayuga Power Station Cayuga, IN 6

Secondary Ash Settling

Basin Secondary Ash Settling Basin None None Low Poor

Dynegy Midwest Generation

Inc Vermilion Power Station Oakwood, IL 6 East Ash Pond (2 cells) East Ash Pond None None Significant Satisfactory

Dynegy Midwest Generation

Inc Vermilion Power Station Oakwood, IL 6 North Ash Pond Unit not assessed Unit not assessed

East Kentucky Power Coop Inc Dale Power Station Winchester, KY 6 Dale Ash Pond #2 Dale Ash Pond #2 None None Significant Fair

East Kentucky Power Coop Inc Dale Power Station Winchester, KY 6 Dale Ash Pond #4 Dale Ash Pond #3 N/A N/A Significant Fair

Dale Ash Pond #3 notlisted in the 104(e)

response, however, EKPC considers ash pond 3

part of ash pond 2

East Kentucky Power Coop Inc Dale Power Station Winchester, KY 6 Not in database Dale Ash Pond #4 Low Low Significant Fair

Hoosier Energy R E C Inc

Frank E. Ratts Power

Station Petersburg, IN 6 Bottom Ash Pond Bottom Ash Pond/Pond 4 None None Significant Poor

Hoosier Energy R E C Inc

Frank E. Ratts Power

Station Petersburg, IN 6 Fly Ash Pond 1 Fly Ash Pond 1 None None Low Poor

Page 8 of 19
Company Facility Location Round

Survey Unit Name (Link

to existing DB) Assessment Unit Name

Hazard Rating from Survey

Database

State or Company

Equivalent Hazard

Potential Classification

Contractor-determined

Hazard Potential

Classification (if

different)*

EPA Condition

Assessment Comments/Notes

Hoosier Energy R E C Inc

Frank E. Ratts Power

Station Petersburg, IN 6 Fly Ash Pond 2 Fly Ash Pond 2 None None Less than low Poor

Hoosier Energy R E C Inc

Frank E. Ratts Power

Station Petersburg, IN 6 Fly Ash Pond 3 Fly Ash Pond 3 None None Less than low Poor

Kentucky Utilities Co Pineville Station Pineville, KY 6 Ash Pond Ash Pond None None Low Satisfactory

Ash Pond has not received CCW since plant

operations were discontinued in 2001. Two

piezometersa installed in August 2010, no data

colleted at time of site assessment

Kentucky Utilities Co Tyrone Power Station Versailles, KY 6 Ash Pond Ash Pond Low Low Significant Fair

Kentucky Utilities Co Green River Power Station Central City, KY 6 Ash Pond Number 2 Ash Pond Number 2 None None Significant Poor Piezometers recently installed, no data yet

Kentucky Utilities Co Tyrone Power Station Versailles, KY 6 Finishing Pond Former Secondary Pond None None N/A Not rated- see note

this pond no longer receives liquid-borne

material(as of May 2010); the dikes of this pond

have been graded;

Kentucky Utilities Co Green River Power Station Central City, KY 6 Finishing Pond Number 3 Finishing Pond Number 3 None None N/A Not rated- see note

Contractor did not rate-taken out of service in

2010, but not officially closed out

Kentucky Utilities Co Green River Power Station Central City, KY 6 Former Ash Pond Former Ash Pond Low Low Significant Poor

Kentucky Utilities Co Green River Power Station Central City, KY 6 Main Ash Pond Main Ash Pond None None Significant Fair

10 piezometers were installed in 2010 (July and

August)

Kentucky Utilities Co Green River Power Station Central City, KY 6 Scrubber Pond Scrubber Pond Low Low Significant Fair

Vectren F. B. Culley Power Station Newburgh, IN 6 East Pond East Pond None None Significant Fair and, the contained material has been removed.

Vectren F. B. Culley Power Station Newburgh, IN 6 West Pond West Pond None None Significant Fair

Allete Inc Syl Laskin Power Station Aurora, MN 7 Cell E Cell E None Significant (Class II) - State Significant Satisfactory

Allete Inc Syl Laskin Power Station Aurora, MN 7 Cells A, B, C & D (retired) Cells A, B, C & D (retired) None None Less than Low Fair

Cells C and D were decommissioned in 1964;

Cells A and B were decomissioned in 2000.

Alliant Energy

Interstate Power & Light Co -

Burlington Generating

Station Burlington, IA 7 Ash Seal Pond Ash Seal Pond None None Low Satisfactory

Rated "Poor" due to lack of technical

documentation.

Alliant Energy

Interstate Power & Light Co -

Burlington Generating

Station Burlington, IA 7 Economizer Ash Pond Economizer Ash Pond None None Low Satisfactory

Rated "Poor" due to lack of technical

documentation.

Alliant Energy Columbia Power Station Pardeeville, WI 7 Landfill Storm Water Pond Landfill Storm Water Pond None None Low Fair

Alliant Energy

Interstate Power & Light Co -

Burlington Generating

Station Burlington, IA 7 Lower Ash Pond Ash Pond 2/Lower Ash Pond None None Low Not rated- see note

Pond was inundated by the Mississippi River

during assessment. The Lower Ash Pond receives

overflow water and clarified water from the Upper

Ash Pond. It therefore receives minimal amounts

of ash, which is a good thing, since every year or

so it gets “cleaned out” when the Mississippi River

overflows the 3-foot (!) dikes. It essentially is

designed as a flood surge pond. Since however it

receives clarified water from the Upper Ash Pond it

receives small amounts of ash and is therefore

included in the report. As you see in Appendix C it

has a Low Hazard rating since there is essentially

no ash in it – only clarified water. Dewberry did

not discuss it much in the report because they

couldn’t see it, and the very low dikes are unlikely

to fail catastrophically – and wouldn’t matter much

if they did.

Alliant Energy Lansing Power Station Lansing, IA 7 Lower Ash Pond Ash Pond 2 None None Low Satisfactory

Alliant Energy

Interstate Power & Light Co -

Burlington Generating

Station Burlington, IA 7 Main Ash Pond

Main Ash Pond/Bottom Ash

Pond None None Low Satisfactory

Rated "Poor" due to lack of technical

documentation.

Alliant Energy

Interstate Power & Light Co -

Ottumwa Generating Station Ottumwa, IA 7 Main Ash Pond Ash Pond 1 None None Low Satisfactory

Alliant Energy Lansing Power Station Lansing, IA 7 Main Ash Pond Ash Pond 1 None None Low Satisfactory

Alliant Energy Columbia Power Station Pardeeville, WI 7 Polishing Pond Polishing Pond None None Less than Low Satisfactory Deactivated in 2004.

Alliant Energy Columbia Power Station Pardeeville, WI 7 Primary Ash Pond Primary Ash Pond None None Significant Satisfactory

Alliant Energy Columbia Power Station Pardeeville, WI 7 Secondary Ash Pond Secondary Ash Pond None None Significant Satisfactory Deactivated in 2004

Alliant Energy

Interstate Power & Light Co -

Burlington Generating

Station Burlington, IA 7 Upper Ash Pond Upper Ash Pond/Ash Pond 1 None None Low Satisfactory

Rated "Poor" due to lack of technical

documentation.

Page 9 of 19
Company Facility Location Round

Survey Unit Name (Link

to existing DB) Assessment Unit Name

Hazard Rating from Survey

Database

State or Company

Equivalent Hazard

Potential Classification

Contractor-determined

Hazard Potential

Classification (if

different)*

EPA Condition

Assessment Comments/Notes

Alliant Energy

Interstate Power & Light Co -

Ottumwa Generating Station Ottumwa, IA 7

Zero Liquid Discharge

Pond Ash Pond 2 None None Low Satisfactory

Ameren UE Rush Island Power Station Festus, MO 7 Ash Pond Ash Pond None None Low Satisfactory

Ameren UE Sioux Power Station West Alton, MO 7 Bottom Ash Pond None None Significant Satisfactory

Ameren UE Meramec Power Station St. Louis, MO 7 Bottom Ash Pond (3) Bottom Ash Pond #493 (Pond 4) None None Low Poor

Ameren UE Meramec Power Station St. Louis, MO 7 Bottom Ash Pond (3) Bottom Ash Pond #492 (Pond 5) None None Low Poor

Ameren UE Meramec Power Station St. Louis, MO 7 Bottom Ash Pond (3)

Bottom Ash Pond #496 (Pond

6) None None Low Poor

Ameren UE Sioux Power Station West Alton, MO 7 Fly Ash Pond None None Low Satisfactory

Ameren UE Meramec Power Station St. Louis, MO 7 New Fly Ash Pond #498 (Pond 3) None None Low Poor

Ameren UE Meramec Power Station St. Louis, MO 7 Old Fly Ash Pond #489 (Pond 2) None None Low Poor

Ameren UE Meramec Power Station St. Louis, MO 7 Retention Pond Pond 1 None None Low Poor

Ameren UE Meramec Power Station St. Louis, MO 7

Fly Ash Pond #494 (Pond 7),

Fly Ash Pond #495 (Pond 8), Fly

Ash Pond #490 (Pond 9), and

Fly Ash Pond #491 (Pond 10)

Not rated- see

note

Ponds 7 and 8 are filled to capacity by fly ash and

are no longer active. Incised ponds, Pond 9 and

Pond 10, are deactivated and are currently

supporting plant structures

and activity.

Associated Electric Coop Inc New Madrid Power Station Marston, MO 7 Ash Pond 1 Ash Pond 1 None None Low Fair

Associated Electric Coop Inc New Madrid Power Station Marston, MO 7 Ash Pond 2 Ash Pond 2 None None Low Fair

Associated Electric Coop Inc New Madrid Power Station Marston, MO 7 Slag Pond 1 Slag Pond 1 None None Significant Fair

Associated Electric Coop Inc New Madrid Power Station Marston, MO 7 Slag Pond 2 Slag Pond 2 None None Significant Fair

Basin Electric Power Coop Leland Olds Power Station Stanton, ND 7 Settling Pond #1 Former Ash Pond #1 None None Significant Poor

been decommissioned and is now used for dry ash

storage

Basin Electric Power Coop Leland Olds Power Station Stanton, ND 7 Settling Pond #2 Ash Pond #2 None None Significant Poor

Basin Electric Power Coop Leland Olds Power Station Stanton, ND 7 Settling Pond #3 Ash Pond #3 None None Significant Poor

Consumers Energy Co

J C Weadock Generating

Plant Essexville, MI 7 East 7 & 8 Ponds None None

Consumers Energy Co

J C Weadock Generating

Plant Essexville, MI 7 Not in database Weadock Landfill Embankment None None Low Satisfactory

In February 2009, the fly ash disposal process

was converted to a “dry” operation.

Consumers Energy Co

J C Weadock Generating

Plant Essexville, MI 7 Not in database J.C. Weadock Fly Ash Dam None None Low Satisfactory

Facility converted to dry fly ash handling system in

Feb. 2009.

Consumers Energy Co J. R. Whiting Power Station Erie, MI 7 Pond 1 Pond 1 None None Significant Fair

Consumers Energy Co J. R. Whiting Power Station Erie, MI 7 Pond 2 Pond 2 None None Significant Fair

Consumers Energy Co J. R. Whiting Power Station Erie, MI 7 Pond 6 Pond 6 Low Low (State) Significant Fair

Consumers Energy Co

Dan E Karn Generating

Plant Essexville, MI 7 Pond A Karn Disposal Area None None Low Satisfactory

Regulated as a Type III landfill in Michigan, not a

dam. The disposal area encompasses what was

formerly known as Pond A. Fly ash from Karn

currently disposed in Weadock Disposal facility.

Consumers Energy Co J. R. Whiting Power Station Erie, MI 7 Ponds 3-5 Not assessed. None None N/A

Recently closed, in the process of being filled and

capped.

Consumers Energy Co

J C Weadock Generating

Plant Essexville, MI 7 West A - E Ponds None None

Detroit Edison Co Monroe Power Station Monroe, MI 7 Bottom Ash Basin Bottom Ash Stormwater Pond None None Low Satisfactory

Detroit Edison Co Monroe Power Station Monroe, MI 7 Fly Ash Basin Fly Ash Basin None None Significant Satisfactory

Regulated as a Type III landfill in Michigan, not a

dam.

Empire District Electric Co Riverton Power Station Riverton, KS 7 Landfill Unit Ash Disposal Pond None None Significant Poor

Kansas City Board of Public

Utilities

Nearman Creek Power

Station Kansas City, KS 7 N/A

bottom ash settling pond and a

clear water pond None None Low Poor

The management unit is divided into two cells by

an internal clay berm. The

northern cell operates as a primary ash settling

basin. The eastern cell operates as a

clear water basin. The cells are hydraulically

connected by a 24” RCP through the

eastern section of the internal dike.

Page 10 of 19
Company Facility Location Round

Survey Unit Name (Link

to existing DB) Assessment Unit Name

Hazard Rating from Survey

Database

State or Company

Equivalent Hazard

Potential Classification

Contractor-determined

Hazard Potential

Classification (if

different)*

EPA Condition

Assessment Comments/Notes

Kansas City Power & Light Co LaCygne Generating Station LaCygne, KS 7 Bottom Ash Settling Pond Not assessed. None None N/A Not assessed

Pond was determined to be incised into the site.

Since it was incised, further evaluation of the unit

was not

performed.

Kansas City Power & Light Co Sibley Generating Station Sibley, MO 7 Fly Ash Settling Pond Fly Ash Pond None None Low Satisfactory

Kansas City Power & Light Co LaCygne Generating Station LaCygne, KS 7 Scrubber Sludge Ponds Upper and Lower AQC Ponds None None Low Satisfactory

Kansas City Power & Light Co LaCygne Generating Station LaCygne, KS 7 Scrubber Sludge Ponds Upper and Lower AQC Ponds None None Low Satisfactory

Kansas City Power & Light Co Sibley Generating Station Sibley, MO 7 Slag Settling Pond Not assessed. None None

since the pond was incised no dike assessment

was required.

MidAmerican Energy Co Louisa Power Station Muscatine, IA 7

Louisa Surface

Impoundment Bottom Ash Pong None None Low Satisfactory

MidAmerican Energy Co Riverside Generating Station Bettendorf, IA 7

North Surface

Impoundment North Ash Pond None None Low Satisfactory

Inactive and no longer receives coal combustion

wastes. Recommended to be deactivated.

MidAmerican Energy Co

Walter Scott Junior Energy

Center IA 7

North Surface

Impoundment North Ash Pond or Ash Pond 2 None None Low Satisfactory

MidAmerican Energy Co Riverside Generating Station Bettendorf, IA 7

South Surface

Impoundment South Ash Pond None None Low Poor

MidAmerican Energy Co

Walter Scott Junior Energy

Center IA 7

South Surface

Impoundment South Ash Pond or Ash Pond 1 None None Low Satisfactory

MidAmerican Energy Co

George Neal North Power

Station Sioux City, IA 7 Surface Impoundment 1 Pond 1 None None Low Satisfactory

MidAmerican Energy Co

George Neal North Power

Station Sioux City, IA 7 Surface Impoundment 2 Pond 2 None None Low Satisfactory

MidAmerican Energy Co

George Neal North Power

Station Sioux City, IA 7 Surface Impoundment 3

Ponds 3A, 3B North, and 3B

South None None Low Satisfactory

Northern States Power Co Black Dog Power Station Burnsville, MN 7 Settling Ponds 1-4 None None Low Fair

Westar Energy Lawrence Energy Center Lawrence, KS 7 Area 1

Area 1, Clear Water Pond, North

Dike None None Significant Satisfactory

Since all four of the pond areas are encompassed

by a perimeter dike, the Dewberry engineers

consider them all part of one large impoundment

containing several cells separated by internal

dikes.

Westar Energy Lawrence Energy Center Lawrence, KS 7 Area 2 Area 2, South Dike None None Significant Satisfactory

Westar Energy Lawrence Energy Center Lawrence, KS 7 Area 3 Area 3, West Dike, South Dike None None Significant Satisfactory

Westar Energy Lawrence Energy Center Lawrence, KS 7 Area 4

Area 4, North Dike, Northwest

Dike None None Significant Satisfactory

Alliant Energy

Interstate Power & Light Co -

M.L. Kapp Generating

Station Clinton, IA 8

Emergency Ash Primary

Settling Pond

Emergency Ash Primary Settling

Pond None None Low Poor

Alliant Energy

Interstate Power & Light Co -

M.L. Kapp Generating

Station Clinton, IA 8

Emergency Ash Secondary

Settling Pond

Emergency Ash Secondary

Settling Pond None None Low Poor

Alliant Energy

Interstate Power & Light Co -

M.L. Kapp Generating

Station Clinton, IA 8

Main Ash Primary Settling

Pond Main Ash Primary Settling Pond None None Low Poor

Alliant Energy

Interstate Power & Light Co -

M.L. Kapp Generating

Station Clinton, IA 8

Main Ash Secondary

Settling Pond

Main Ash Secondary Settling

Pond None None Low Poor

Ameren UE Labadie Power Station Labadie, MO 8 Bottom Ash Pond Bottom Ash Pond None None Low Fair

Ameren UE Labadie Power Station Labadie, MO 8 Fly Ash Pond Fly Ash Pond None None Low Fair

Fly Ash dry handled, but this pond is used when

no market exists for re-used fly ash

American Electric Power

Southwestern Electric Power

Co - Pirkey Power Station Hallsville, TX 8 Auxilliary Surge Pond Auxilliary Surge Pond None None Low Fair

American Electric Power

Southwestern Electric Power

Co - Pirkey Power Station Hallsville, TX 8 East Bottom Ash Pond East Bottom Ash Pond None None Low Satisfactory

American Electric Power

Southwestern Electric Power

Co - Pirkey Power Station Hallsville, TX 8

Scrubber Sludge Landfill

Runoff Pond

Scrubber Sludge Landfill Runoff

Pond None None Low Poor

American Electric Power

Southwestern Electric Power

Co - Pirkey Power Station Hallsville, TX 8

Secondary Bottom Ash

Pond Secondary Bottom Ash Pond None None Low Satisfactory

American Electric Power

Southwestern Electric Power

Co - Pirkey Power Station Hallsville, TX 8 Surge Pond Surge Pond None None Low Satisfactory

Page 11 of 19
Company Facility Location Round

Survey Unit Name (Link

to existing DB) Assessment Unit Name

Hazard Rating from Survey

Database

State or Company

Equivalent Hazard

Potential Classification

Contractor-determined

Hazard Potential

Classification (if

different)*

EPA Condition

Assessment Comments/Notes

American Electric Power

Southwestern Electric Power

Co - Pirkey Power Station Hallsville, TX 8 West Bottom Ash Pond West Bottom Ash Pond None None Low Fair

Associated Electric Coop Inc Thomas Hill Energy Center Thomas Hill, MO 8 Ash - 2 Landfill Not assessed None None Regulated as landfill.

Associated Electric Coop Inc Thomas Hill Energy Center Thomas Hill, MO 8 Ash -3 Landfill Not assessed None None Regulated as landfill.

Associated Electric Coop Inc Thomas Hill Energy Center Thomas Hill, MO 8 Ash Pond Cell 1 - Upper Not assessed None None Dry CCR storage only.

Associated Electric Coop Inc Thomas Hill Energy Center Thomas Hill, MO 8 Ash Pond Cell 2 - Middle Ash Pond - Cell No. 2 None None Low Satisfactory

Associated Electric Coop Inc Thomas Hill Energy Center Thomas Hill, MO 8 Ash Pond Cell 3 - Lowest Not assessed None None Decant water storage only.

Associated Electric Coop Inc Thomas Hill Energy Center Thomas Hill, MO 8 Ash Pond Slag Dewatering Slag Dewatering Basin None None Low Fair

Basin Electric Power Coop Antelope Valley Station Beulah, ND 8

Decant Pond (Temporary

Pond)

Spray Drier Ash Decantation

Pond None None Low Fair

Basin Electric Power Coop Antelope Valley Station Beulah, ND 8

Spray Drier Ash Water

Make-Up Pond

Spray Drier Ash Water Make-Up

Pond None None Low Fair

City of Independence Blue Valley Power Station Independence, MO 8 Bottom Ash Pond Bottom Ash Pond None None Low Fair

City of Independence Blue Valley Power Station Independence, MO 8 North Fly Ash Pond North Fly Ash Pond None None Low Fair 2008 taken out of service

City of Independence Blue Valley Power Station Independence, MO 8 South Fly Ash Pond South Fly Ash Pond None None Low Fair 1991 taken out of service

City of Los Angeles Intermountain Power Project Delta, UT 8 Ash Water Recycle Ash Recycle Basin None Low (State) Not assessed Not assessed

City of Los Angeles Intermountain Power Project Delta, UT 8 Bottom Ash Basin Bottom Ash Basin #1, #2, #3 None Low (State) Low Fair

City of Los Angeles Intermountain Power Project Delta, UT 8

Evaporation Ponds (6

Ponds) Evaporation Ponds (6 Ponds) None Low (State) Not assessed Not assessed

City of Los Angeles Intermountain Power Project Delta, UT 8 Land Fill Run-Off Land Fill Run-Off Basin None Low (State) Not assessed Not assessed

City of Los Angeles Intermountain Power Project Delta, UT 8 Settling Basin Settling Basin None Low (State) Not assessed Not assessed

City of Los Angeles Intermountain Power Project Delta, UT 8 Wastewater Holding Basin Wastewater Holding Basin None Low (State) Low Fair

Cleco Power LLC Dolet Hills Power Station Mansfield, LA 8 Ash Basin No. 1 Ash Pond 1 None Low (State) Low Fair

Cleco Power LLC Dolet Hills Power Station Mansfield, LA 8 Ash Basin No. 2 Ash Pond 2 None Low (State) Low Fair

Cleco Power LLC Dolet Hills Power Station Mansfield, LA 8 Auxiliary Surge Pond Auxiliary Surge Pond None None Low Satisfactory

Cleco Power LLC Dolet Hills Power Station Mansfield, LA 8 Not in database Fly Ash/FGD Landfill Pond None None Low Poor

Cleco Power LLC Dolet Hills Power Station Mansfield, LA 8 Secondary Basin Secondary Ash Pond None Low (State) Low Poor

Cleco Power LLC Dolet Hills Power Station Mansfield, LA 8 Surge Pond Surge Pond 1 None None Low Poor

Cleco Power LLC Dolet Hills Power Station Mansfield, LA 8 Surge Pond No. 2 Surge Pond 2 None None Low Poor

Empire District Electric Co Asbury Power Station Asbury, MO 8

Ash Impoundment

(includes all ponds in the

database) Lower Pond None None Significant Poor Rated poor due to lack of technical documentation.

Empire District Electric Co Asbury Power Station Asbury, MO 8

Not in database

(considered together as

"Ash Impoundment") Upper Pond None None Low Poor Rated poor due to lack of technical documentation.

Empire District Electric Co Asbury Power Station Asbury, MO 8

Not in database

(considered together as

"Ash Impoundment") South Pond None None Low Poor Rated poor due to lack of technical documentation.

Minnkota Power Coop Inc

Milton R. Young Power

Station Center, ND 8 30 Year Ponds (Cell 2) Cell 2 None Significant Satisfactory

Minnkota Power Coop Inc

Milton R. Young Power

Station Center, ND 8

Horseshoe Pit Evaporation

Pond

Not assessed, does not received

sluiced ash or other CCW. None

Not assessed, does not received sluiced ash or

other CCW.

Minnkota Power Coop Inc

Milton R. Young Power

Station Center, ND 8 Not in database Cell 1 None Significant Satisfactory

Minnkota Power Coop Inc

Milton R. Young Power

Station Center, ND 8

Unit 1 Alternative Bottom

Ash Pond Alternate Bottom Ash Pond None Low Fair

Page 12 of 19
Company Facility Location Round

Survey Unit Name (Link

to existing DB) Assessment Unit Name

Hazard Rating from Survey

Database

State or Company

Equivalent Hazard

Potential Classification

Contractor-determined

Hazard Potential

Classification (if

different)*

EPA Condition

Assessment Comments/Notes

PacifiCorp

Dave Johnston Power

Station Glenrock, WY 8 1A Ash Pond 1A Ash Pond None None

Partially abandoned, filled, used for lay-down yard -

not assessed. Impoundment is contained by

natural cut slopes or divider dikes that are not

expected to result in a release of CCW to the

environment upon

failure

PacifiCorp

Dave Johnston Power

Station Glenrock, WY 8 1A Clear Pond 1A Clear Pond None None Significant Poor

PacifiCorp

Dave Johnston Power

Station Glenrock, WY 8 1B Ash Pond 1B Ash Pond None None

Not assessed because impoundment is contained

by natural cut slopes or divider dikes that are not

expected to result in a release of CCW to the

environment upon

failure

PacifiCorp

Dave Johnston Power

Station Glenrock, WY 8 1B Clear Pond 1B Clear Pond None None Significant Poor

PacifiCorp

Dave Johnston Power

Station Glenrock, WY 8 4 Clear Pond 4 Clear Pond None None Low Poor

PacifiCorp

Dave Johnston Power

Station Glenrock, WY 8 4A Ash Pond 4A Ash Pond None None Low Poor

PacifiCorp

Dave Johnston Power

Station Glenrock, WY 8 4B Ash Pond 4B Ash Pond None None Low Poor

PacifiCorp Wyodak Power Station Gillette, WY 8 Ash Pond North Pit Ash Pond None None Less than Low Satisfactory

PacifiCorp

Dave Johnston Power

Station Glenrock, WY 8 Blowdown Canal Blowdown Canal None None Subsurface canal, not above grade, not assessed.

Westar Energy Tecumseh Energy Center Tecumseh, KS 8 Area 1 (NPDES Ash Pond) Area 1 Pond None None Significant Fair

Westar Energy Tecumseh Energy Center Tecumseh, KS 8 Area 2 (Clear Pond) Area 2 Pond None None Low Satisfactory

Western Farmers Elec Coop

Inc Hugo Power Station Fort Towson, OK 8 North Bottom Ash Unit North Bottom Ash Unit None None Low Poor

Western Farmers Elec Coop

Inc Hugo Power Station Fort Towson, OK 8 North Fly Ash North Fly Ash None None Low Poor

Western Farmers Elec Coop

Inc Hugo Power Station Fort Towson, OK 8 South Bottom Ash South Bottom Ash None None Low Poor

Western Farmers Elec Coop

Inc Hugo Power Station Fort Towson, OK 8 South Fly Ash Unit South Fly Ash Unit None None Low Poor

Alabama Power Co

James H. Miller Jr. Power

Station Quinton, AL 9 Ash Pond (NID #1101) Main Dike (Dam) Low Significant Satisfactory

Alabama Power Co

James H. Miller Jr. Power

Station Quinton, AL 9 Ash Pond (NID #1101) Saddle Dike Low Satisfactory

Alabama Power Co Gadsden Power Station East Gadsden, AL 9 Ash Pond (NID #1428) Gadsen Plant Ash Pond Low None Significant Satisfactory

American Electric Power

Appalachian Power Co - Glen

Lyn Power Station Glen Lyn, VA 9 Bottom Ash Pond Bottom Ash Pond Low Class III (State) Low Fair

Instrumentation including piezometers and

observation wells were installed at the Fly Ash Pond

and Bottom Ash Pond as temporary measures to

collect data for use in the slope stability analyses for

each pond. A continuous record of observations from

these instruments is not tracked

American Electric Power

OK Public Service Co -

Northeastern 3 & 4 Plant Oologah, OK 9 Bottom Ash Pond Bottom Ash Basin None low poor

American Electric Power

Appalachian Power Co - Clinch

River Carbo, VA 9 Bottom Ash Pond 1A/1B Ash Pond 1 (Ponds 1A/1B) Low Class III (State) Significant Fair

American Electric Power

Appalachian Power Co - Clinch

River Carbo, VA 9 Bottom Ash Pond 2 Ash Pond 2 Inactive Low Class III (State) Significant Poor

*slope stability analysis completed by BBC&M

Engineering in 2008 cannot be used for the

purpose of this report based on design parameters

used and inappropriate assumptions concerning

saturated ash levels.

American Electric Power

Appalachian Power Co - Glen

Lyn Power Station Glen Lyn, VA 9 Fly Ash Pond Auxilary Fly Ash Pond Low Class III (State) Low Fair

Instrumentation including piezometers and

observation wells were installed at the Fly Ash Pond

and Bottom Ash Pond as temporary measures to

collect data for use in the slope stability analyses for

each pond. A continuous record of observations from

these instruments is not tracked

Page 13 of 19
Company Facility Location Round

Survey Unit Name (Link

to existing DB) Assessment Unit Name

Hazard Rating from Survey

Database

State or Company

Equivalent Hazard

Potential Classification

Contractor-determined

Hazard Potential

Classification (if

different)*

EPA Condition

Assessment Comments/Notes

American Electric Power

OK Public Service Co -

Oklaunion Power Station Vernon, TX 9 Pond #23 Not assessed- incised None

American Electric Power

OK Public Service Co -

Oklaunion Power Station Vernon, TX 9 Pond #6 Waste Water Evaporation Pond #6 None none low Satisfactory Pond #6 scheduled to be closed.

American Electric Power

Southwestern Electric Power

Co - Flint Creek Power Station Gentry, AR 9 Primary Bottom Ash Pond Primary Bottom Ash Pond None low satisfactory

American Electric Power

Southwestern Electric Power

Co - Flint Creek Power Station Gentry, AR 9 Secondary Bottom Ash Pond Secondary Bottom Ash Pond None low satisfactory

American Electric Power

OK Public Service Co -

Oklaunion Power Station Vernon, TX 9 Sludge Pond Not assessed- incised None

Duke Energy Corp Cliffside Power Station Mooresboro, NC 9 Active Pond Upstream Embankment Low Significant Satisfactory

Duke Energy Corp Cliffside Power Station Mooresboro, NC 9 Active Pond Downstream Embankment Low Significant Satisfactory

Duke Energy Corp Cliffside Power Station Mooresboro, NC 9 Retired Unit 1-4 Basin Unit not assessed not assessed

Duke Energy Corp Cliffside Power Station Mooresboro, NC 9 Retired Unit 5 Basin Unit not assessed not assessed

East Kentucky Power Coop Inc H. L. Spurlock Power Station Maysville, KY 9 Spurlock Ash Pond Spurlock Ash Pond Low Low (State) Low satisfactory

Georgia Power Co McIntosh Power Station Rincon, GA 9 Ash Pond Ash Pond None Category II (State) low satisfactory

Georgia Power Co Kraft Power Station Port Wentworth, GA 9 Ash Pond Ash Pond None low satisfactory

Kansas City Power & Light Co Montrose Generating Station Clinton, MO 9 Ash Settling Pond South Ash Pond None Less than Low Satisfactory

Kansas City Power & Light Co Montrose Generating Station Clinton, MO 9 Ash Settling Pond North Ash Pond None Less than Low Satisfactory

company survey response only includes on unit,

contractor assessed two.

Kansas City Power & Light Co Lake Road Generating Station St. Joseph, MO 9 Settling Pond Interim Settling Basin (Southwest Settling Basin)None Low Satisfactory

“ The CCB Ash Pond functions as one ash pond

separated into four pools; therefore, Kleinfelder only

considered the outer embankment of the CCB Ash

Pond, disregarding the interior dike between the

northeast and northwest pools and the filter dikes

between the northern pools and southeast and

southwest pools.”

Kansas City Power & Light Co Lake Road Generating Station St. Joseph, MO 9 Settling Pond

Final Settling Basin (Southeast

Settling Basin) None Low Satisfactory

“ The CCB Ash Pond functions as one ash pond

separated into four pools; therefore, Kleinfelder only

considered the outer embankment of the CCB Ash

Pond, disregarding the interior dike between the

northeast and northwest pools and the filter dikes

between the northern pools and southeast and

southwest pools.”

Kansas City Power & Light Co Lake Road Generating Station St. Joseph, MO 9 Slag Settling Pond

Slag Settling Pool (Northeast

Ash Pool) None Low Satisfactory

“ The CCB Ash Pond functions as one ash pond

separated into four pools; therefore, Kleinfelder only

considered the outer embankment of the CCB Ash

Pond, disregarding the interior dike between the

northeast and northwest pools and the filter dikes

between the northern pools and southeast and

southwest pools.”

Kansas City Power & Light Co Lake Road Generating Station St. Joseph, MO 9

Coal Pile Run-off Pool

(Northwest Ash Pool) None Low Satisfactory

“ The CCB Ash Pond functions as one ash pond

separated into four pools; therefore, Kleinfelder only

considered the outer embankment of the CCB Ash

Pond, disregarding the interior dike between the

northeast and northwest pools and the filter dikes

between the northern pools and southeast and

southwest pools.”

NRG Texas Power, LLC

Limestone Electric Generating

Station Jewett, TX 9 Bottom Ash Cooling Pond Not assessed None

NRG Texas Power, LLC

Limestone Electric Generating

Station Jewett, TX 9

Dewatered Sludge Disposal

Area Dewatered Sludge Disposal Area None low Satisfactory

NRG Texas Power, LLC

Limestone Electric Generating

Station Jewett, TX 9 FGD Emergency Pond E Not assessed None

NRG Texas Power, LLC

Limestone Electric Generating

Station Jewett, TX 9 Not in database ST-18 low Satisfactory

NRG Texas Power, LLC

Limestone Electric Generating

Station Jewett, TX 9 ST-10 Pump Not assessed None

NRG Texas Power, LLC

Limestone Electric Generating

Station Jewett, TX 9 ST-9 Pump Not assessed None

NRG Texas Power, LLC

Limestone Electric Generating

Station Jewett, TX 9 Stormwater Pond A Not assessed None

Page 14 of 19
Company Facility Location Round

Survey Unit Name (Link

to existing DB) Assessment Unit Name

Hazard Rating from Survey

Database

State or Company

Equivalent Hazard

Potential Classification

Contractor-determined

Hazard Potential

Classification (if

different)*

EPA Condition

Assessment Comments/Notes

NRG Texas Power, LLC

Limestone Electric Generating

Station Jewett, TX 9 Stormwater Pond B Not assessed None

NV Energy

Reid Gardner Generating

Station Moapa, NV 9 B1 B1 None Significant Significant Fair

NV Energy

Reid Gardner Generating

Station Moapa, NV 9 B2 B2 None Significant Significant Fair

NV Energy

Reid Gardner Generating

Station Moapa, NV 9 B3 B3 None Significant Significant Fair

NV Energy

Reid Gardner Generating

Station Moapa, NV 9 C1 C1 None Significant Significant Fair

NV Energy

Reid Gardner Generating

Station Moapa, NV 9 C2 C2 None Significant Significant Fair

NV Energy

Reid Gardner Generating

Station Moapa, NV 9 E1 E1 None Significant Significant Fair

NV Energy

Reid Gardner Generating

Station Moapa, NV 9 E2 E2 None Significant Significant Fair

NV Energy

Reid Gardner Generating

Station Moapa, NV 9 F F None Significant Significant Fair

Progress Energy Carolinas Inc L. V. Sutton Power Station Wilmington, NC 9 1971 Pond 1971 Pond Low significant Satisfactory inactive

Progress Energy Carolinas Inc

W. H. Weatherspoon Power

Station Lumberton, NC 9 1979 Pond Ash Pond Low Intermediate Hazard (NC) low Fair

Progress Energy Carolinas Inc Lee Power Station Goldsboro, NC 9 1980 Pond Active Ash Pond, Wayne-022 Low high (NC) Significant fair

Progress Energy Carolinas Inc L. V. Sutton Power Station Wilmington, NC 9 1984 Pond 1984 Pond Low significant Satisfactory active

Progress Energy Carolinas Inc Lee Power Station Goldsboro, NC 9 Not in database Inactive Ash Pond 1, Wayne-031 low Satisfactory

Taken out of service in 1973 and have not been

used since

Progress Energy Carolinas Inc Lee Power Station Goldsboro, NC 9 Not in database Inactive Ash Pond 2, Wayne-032 low fair

Taken out of service in 1973 and have not been

used since

Progress Energy Carolinas Inc Lee Power Station Goldsboro, NC 9 Not in database Inactive Ash Pond 3, Wayne-033 low Satisfactory

Taken out of service in 1973 and have not been

used since

Progress Energy Carolinas Inc H. B. Robinson Power Station Hartsville, SC 9 Pond Ash Pond Low Low (company) low Satisfactory

Santee Cooper (South Carolina

Pub Serv Auth) Cross Power Station Pinesville, SC 9 Bottom Ash 1 Bottom Ash Pond 1 None Low (company) Low satisfactory

Santee Cooper (South Carolina

Pub Serv Auth) Cross Power Station Pinesville, SC 9 Bottom Ash 2 Bottom Ash Pond 2 None Low (company) Low satisfactory

Santee Cooper (South Carolina

Pub Serv Auth) Cross Power Station Pinesville, SC 9 Gypsum Pond Gypsum Pond None Less than Low (company) Less than Low satisfactory

South Carolina Electric&Gas Co Canadys Steam Power Station Canadys, SC 9 Active Ash Pond Active Ash Pond None None Low Poor

factors of safety for seismic loading conditions that

do not

meet required standards.

South Carolina Electric&Gas Co Urquhart Generating Station Beech Island, SC 9 Ash Pond 1 Ash Pond; Ash Pond Upper Pool None low satisfactory

Although each unit was rated satisfactory, a

potential for liquefaction to occur and not

apparently seen as an issue. Recommendations

section does not address this issue.

South Carolina Electric&Gas Co Urquhart Generating Station Beech Island, SC 9 Ash Pond 2 Ash Pond; Ash Pond Lower Pool None low satisfactory

Although each unit was rated satisfactory, a

potential for liquefaction to occur and not

apparently seen as an issue. Recommendations

section does not address this issue.

South Carolina Electric&Gas Co Canadys Steam Power Station Canadys, SC 9 Inactive Ash Pond Inactive Ash Pond None None Low Poor

factors of safety for seismic loading conditions that

do not

meet required standards.

Tampa Electric Co Big Bend Power Station Apollo Beach, FL 9 Longterm Flyash Pond Not assessed Low

Tampa Electric Co Big Bend Power Station Apollo Beach, FL 9 North Bottom Ash North Bottom Ash Low Low Fair

Tampa Electric Co Big Bend Power Station Apollo Beach, FL 9 North Economizer Ash Pond North Economizer Ash Pond Low Low Fair

Tampa Electric Co Big Bend Power Station Apollo Beach, FL 9 North Recycle Pond Not assessed Low

Tampa Electric Co Big Bend Power Station Apollo Beach, FL 9 Settling Pond Not assessed Low

Tampa Electric Co Big Bend Power Station Apollo Beach, FL 9 South Bottom Ash Pond South Bottom Ash Pond Low Low Fair

Tampa Electric Co Big Bend Power Station Apollo Beach, FL 9 South Economizer Ash Pond South Economizer Ash Pond Low Low Fair inactive

Tampa Electric Co Big Bend Power Station Apollo Beach, FL 9 South Recycle Pond Not assessed Low

Alliant Energy

Interstate Power & Light Co -

Sixth Street Generating Station Cedar Rapids, IA 10 Ash Pond 1 None None low Fair

Page 15 of 19
Company Facility Location Round

Survey Unit Name (Link

to existing DB) Assessment Unit Name

Hazard Rating from Survey

Database

State or Company

Equivalent Hazard

Potential Classification

Contractor-determined

Hazard Potential

Classification (if

different)*

EPA Condition

Assessment Comments/Notes

Alliant Energy

Interstate Power & Light Co -

Sixth Street Generating Station Cedar Rapids, IA 10 Ash Pond 2 None None low Fair

Alliant Energy

Interstate Power & Light Co -

Sixth Street Generating Station Cedar Rapids, IA 10 Ash Pond 3 None None low Fair

Alliant Energy

Interstate Power & Light Co -

Sixth Street Generating Station Cedar Rapids, IA 10 Ash Pond 4 None None low Fair

Alliant Energy

Interstate Power & Light Co -

Sutherland Generating Station Marshalltown, IA 10 Main Ash Settling Pond Main Pond None low Fair

Alliant Energy

Interstate Power & Light Co -

Sutherland Generating Station Marshalltown, IA 10

Unit 1 & 2 Initial Settling

Pond North Primary Settling Pond None Not Assessed

Alliant Energy

Interstate Power & Light Co -

Sutherland Generating Station Marshalltown, IA 10 Unit 3 Inititial Settling Pond South Primary Settling Pond None Not Assessed

Alliant Energy

WI Power & Light Co -

Edgewater Generating Station Sheboygan, WI 10 A Ponds (Two) South A Pond None low Satisfactory

Alliant Energy

WI Power & Light Co -

Edgewater Generating Station Sheboygan, WI 10 A Ponds (Two) North A Pond None low Satisfactory

Alliant Energy

WI Power & Light Co -

Edgewater Generating Station Sheboygan, WI 10 B Pond None low Satisfactory

Alliant Energy

WI Power & Light Co -

Edgewater Generating Station Sheboygan, WI 10 C Pond None Not Assessed

Alliant Energy

WI Power & Light Co -

Edgewater Generating Station Sheboygan, WI 10 F Pond None low Satisfactory

Alliant Energy

WI Power & Light Co -

Edgewater Generating Station Sheboygan, WI 10

I43 Coal Combustion landfill

Contact Pond None Not Assessed

Alliant Energy

WI Power & Light Co -

Edgewater Generating Station Sheboygan, WI 10 Slag Pond None low Satisfactory

Alliant Energy

WI Power & Light Co -Nelson

Dewey Generating Station Cassville, WI 10 Slag Pond None Low Satisfactory

Alliant Energy

WI Power & Light Co -Nelson

Dewey Generating Station Cassville, WI 10 WPDES Pond None Low Satisfactory

Alliant Energy

WI Power & Light Co -Rock

River Generating Beloit, WI 10 Final WPDES Pond None Low Poor

Alliant Energy

WI Power & Light Co -Rock

River Generating Beloit, WI 10 Slag Pond None Less than Low poor

Alliant Energy

WI Power & Light Co -Rock

River Generating Beloit, WI 10 WPDES Pond 1 None Low poor

Alliant Energy

WI Power & Light Co -Rock

River Generating Beloit, WI 10 WPDES Pond 2 None Low poor

Ameren Energy Generating Co Hutsonville Power Station Hustonville, IL 10 Ash Pond A Ash Pond A/Fly Ash Disposal Pond Low Class III (state) Low poor

Ameren Energy Generating Co Hutsonville Power Station Hustonville, IL 10 Ash Pond B Ash Pond B/Interim Ash Pond None None Low poor

Ameren Energy Generating Co Hutsonville Power Station Hustonville, IL 10 Ash Pond C Ash Pond C None not assessed

Ameren Energy Generating Co Hutsonville Power Station Hustonville, IL 10 Bottom Ash Pond Pond D None None Low poor

American Electric Power

Columbus Southern Power Co -

Picway Power Station Lockbourne, OH 10 Ash Pond Low class II (state) significant satisfactory

Basin Electric Power Coop Laramie River Power Station Wheatland, WY 10 Bottom Ash Pond Bottom Ash Pond 1 Low Low Low Poor

Basin Electric Power Coop Laramie River Power Station Wheatland, WY 10 Bottom Ash Pond Bottom Ash Pond 2 Low Low Low Poor

Basin Electric Power Coop Laramie River Power Station Wheatland, WY 10 Bottom Ash Pond Bottom Ash Pond 3 Low Low Significant Poor

Basin Electric Power Coop Laramie River Power Station Wheatland, WY 10 Emergency Holding Pond East Emergency Holding Pond Low Low Significant Poor

Basin Electric Power Coop Laramie River Power Station Wheatland, WY 10 Emergency Holding Pond West Emergency Holding Pond Low Low Significant Poor

Page 16 of 19
Company Facility Location Round

Survey Unit Name (Link

to existing DB) Assessment Unit Name

Hazard Rating from Survey

Database

State or Company

Equivalent Hazard

Potential Classification

Contractor-determined

Hazard Potential

Classification (if

different)*

EPA Condition

Assessment Comments/Notes

Dayton Power & Light Co Killen Station Manchester, OH 10 Bottom Ash Pond Low class I high poor

Dayton Power & Light Co Killen Station Manchester, OH 10 Fly Ash Pond Low class I high poor

Dynegy Midwest Generation Inc Baldwin Energy Complex Baldwin, IL 10 Ash Pond System Primary Fly Ash Pond (PFAP) None significant poor

Dynegy Midwest Generation Inc Baldwin Energy Complex Baldwin, IL 10 Ash Pond System Secondary Fly Ash Pond (SFAP) None significant poor

Dynegy Midwest Generation Inc Baldwin Energy Complex Baldwin, IL 10 Ash Pond System Secondary Pond None low poor

Dynegy Midwest Generation Inc Baldwin Energy Complex Baldwin, IL 10 Ash Pond System Intermediate Pond/Ash Pond Dike None low poor

Dynegy Midwest Generation Inc Baldwin Energy Complex Baldwin, IL 10 Ash Pond System Final Pond/Settling Pond Dike None significant poor

Dynegy Midwest Generation Inc Hennepin Power Station Hennepin, IL 10 Ash Pond System (2 cells)

Active East Ash Pond SystemPrimary Cell Low Class III (state) significant Poor

Dynegy Midwest Generation Inc Hennepin Power Station Hennepin, IL 10 Ash Pond System (2 cells)

Active East Ash Pond SystemSecondary Cell Low Class III (state) significant Poor

Dynegy Midwest Generation Inc Hennepin Power Station Hennepin, IL 10 Ash Pond System (2 cells)

Active East Ash Pond System-Pond

2 East (2E) Low None significant Poor

Dynegy Midwest Generation Inc Hennepin Power Station Hennepin, IL 10 Ash Pond System (2 cells) East Ash Pond System-Pond 2 Low None significant Poor out of service since 1995

Dynegy Midwest Generation Inc Hennepin Power Station Hennepin, IL 10 Ash Pond System (2 cells) East Ash Pond System-Pond 4 Low None significant Poor out of service since 1995

Dynegy Midwest Generation Inc Hennepin Power Station Hennepin, IL 10 Ash Pond System (2 cells) West Ash Pond System-Pond 1 Low None significant Poor out of service since 1997

Dynegy Midwest Generation Inc Hennepin Power Station Hennepin, IL 10 Ash Pond System (2 cells) West Ash Pond System-Pond 3 Low None significant Poor out of service since 1997

Edison International Homer City Generating Station Homer City, PA 10

Ash Disposal Site -

Polishing Pond None Not Assessed

Edison International Homer City Generating Station Homer City, PA 10

Ash Disposal Site -

Stormwater Surge Pond None Not Assessed

Edison International Homer City Generating Station Homer City, PA 10

Ash Disposal Site -

Treatment Pond #1 None Not Assessed

Edison International Homer City Generating Station Homer City, PA 10

Ash Disposal Site -

Treatment Pond #2 None Not Assessed

Edison International Homer City Generating Station Homer City, PA 10 Ash Recycle Pond #1 None None less than low poor

Edison International Homer City Generating Station Homer City, PA 10 Ash Recycle Pond #2 None None less than low poor

Edison International Homer City Generating Station Homer City, PA 10 Ash Recycle Pond #3 None None less than low poor

Edison International Homer City Generating Station Homer City, PA 10 Ash Recycle Pond #4 None None less than low poor

Edison International Homer City Generating Station Homer City, PA 10

Coal Refuse Disposal Site -

Leachate Pump Pond None Not Assessed

Edison International Homer City Generating Station Homer City, PA 10

Coal Refuse Disposal Site -

Small Sediment Trap None Not Assessed

Edison International Homer City Generating Station Homer City, PA 10

Coal Refuse Disposal Site -

Stage I & II Pond None Not Assessed

Edison International Homer City Generating Station Homer City, PA 10

Coal Refuse Disposal Site -

Stage III & IV Pond Low Not Assessed

Edison International Homer City Generating Station Homer City, PA 10

Coal Refuse Disposal Site -

Storage Pond #1 None Not Assessed

Edison International Homer City Generating Station Homer City, PA 10

Coal Refuse Disposal Site -

Storage Pond #2 None Not Assessed

First Light Power Resources Mt. Tom Station Holyoke, MA 10 Bottom Ash Basin Bottom Ash Basin A/Basin A None low poor

First Light Power Resources Mt. Tom Station Holyoke, MA 10 Equalization Tank None Not Assessed

First Light Power Resources Mt. Tom Station Holyoke, MA 10 Special Basin Special Basin/Sedimentation Basin None low poor

Great River Energy Coal Creek Station Underwood, ND 10 Ash Pond 91 Low None Low satisfactory

Great River Energy Coal Creek Station Underwood, ND 10

Upstream Raise/Ash Pond

92/Drains Pond Low None Low satisfactory

Great River Energy Stanton Plant Stanton, ND 10

Middle Bottom Ash

Pond/Retention Cell Center Drainage Pond Less than Low Less than Low satisfactory

Great River Energy Stanton Plant Stanton, ND 10

North Bottom Ash

Pond/Cell North Ash Pond Less than Low Less than Low satisfactory

Page 17 of 19
Company Facility Location Round

Survey Unit Name (Link

to existing DB) Assessment Unit Name

Hazard Rating from Survey

Database

State or Company

Equivalent Hazard

Potential Classification

Contractor-determined

Hazard Potential

Classification (if

different)*

EPA Condition

Assessment Comments/Notes

Great River Energy Stanton Plant Stanton, ND 10

South Bottom Ash

Pond/Cell 2 South Ash Pond Less than Low Less than Low satisfactory

Lansing Board of Water & Light Erickson Power Station Lansing, MI 10 Unit 1 Ash Pond None low (state) low UNRATED

At the time of our inspection, the Ash Pond was

dewatered and in the process of undergoing

modifications which included excavation and

removal of previously placed ash followed by

disposal at an off-site Type JI sanitary landfill.

Therefore, in accordance with EPA's direction,

GZA has not assigned a condition rating for this

impoundment structure at this time.

Northern Indiana Pub Serv Co Bailly Generating Station Chesterton, IN 10 Bottom Ash Pond Bottom Ash Storage Area None none UNRATED unit is incised.

Northern Indiana Pub Serv Co Bailly Generating Station Chesterton, IN 10 Forebay None none UNRATED unit is incised.

Northern Indiana Pub Serv Co Bailly Generating Station Chesterton, IN 10 Primary 1 Primary Settling Pond No. 1 None none UNRATED unit is incised.

Northern Indiana Pub Serv Co Bailly Generating Station Chesterton, IN 10 Primary 2 Primary Settling Pond No. 2 None none UNRATED unit is incised.

Northern Indiana Pub Serv Co Bailly Generating Station Chesterton, IN 10 Secondary 1 Secondary Settling Pond No. 1 None none UNRATED unit is incised.

Northern Indiana Pub Serv Co Bailly Generating Station Chesterton, IN 10 Secondary 2 Secondary Settling Pond No. 2 None none UNRATED unit is incised.

Northern Indiana Pub Serv Co

D.H. Mitchell Generating

Station Gary, IN 10 Primary 1 Primary Settling Basin No. 1 None less than low UNRATED

breached following plant shutdown in 2002 and no

longer contain liquids

Northern Indiana Pub Serv Co

D.H. Mitchell Generating

Station Gary, IN 10 Primary 2 Primary Settling Basin No. 2 None less than low UNRATED

breached following plant shutdown in 2002 and no

longer contain liquids

Northern Indiana Pub Serv Co

D.H. Mitchell Generating

Station Gary, IN 10 Primary 3 Primary Settling Basin No. 3 None less than low UNRATED

breached following plant shutdown in 2002 and no

longer contain liquids

Northern Indiana Pub Serv Co

D.H. Mitchell Generating

Station Gary, IN 10 Primary 4 Primary Settling Basin No. 4 None UNRATED incised

Northern Indiana Pub Serv Co

D.H. Mitchell Generating

Station Gary, IN 10 Secondary 1 Secondary Settling Basin No. 1 None less than low UNRATED

breached following plant shutdown in 2002 and no

longer contain liquids

Northern Indiana Pub Serv Co

D.H. Mitchell Generating

Station Gary, IN 10 Secondary 2 Secondary Settling Basin No. 2 None less than low UNRATED

breached following plant shutdown in 2002 and no

longer contain liquids

Northern Indiana Pub Serv Co

Michigan City Generating

Station Michigan City, IN 10 Bottom Ash Pond None None not assessed

Northern Indiana Pub Serv Co

Michigan City Generating

Station Michigan City, IN 10 Final Settling Basin Final Settling Pond (FSP) None None low satisfactory

Northern Indiana Pub Serv Co

Michigan City Generating

Station Michigan City, IN 10 Primary 1 Primary Settling Pond No. 1 None None significant satisfactory

Northern Indiana Pub Serv Co

Michigan City Generating

Station Michigan City, IN 10 Primary 2 Primary Settling Pond No. 2 None None significant satisfactory

Northern Indiana Pub Serv Co

Michigan City Generating

Station Michigan City, IN 10 Secondary 1 Secondary Settling Pond No. 1 None None low satisfactory

Northern Indiana Pub Serv Co

Michigan City Generating

Station Michigan City, IN 10 Secondary 2 Secondary Settling Pond No. 2 None None low satisfactory

NRG Huntley Power, LLC

Huntley Electric Generating

Station Tonawanda, NY 10 Not in Survey Pond 1 None none UNRATED incised

NRG Huntley Power, LLC

Huntley Electric Generating

Station Tonawanda, NY 10 Not in Survey Pond 2 None significant fair

NRG Huntley Power, LLC

Huntley Electric Generating

Station Tonawanda, NY 10 Not in Survey Pond 3 None significant fair

NRG Huntley Power, LLC

Huntley Electric Generating

Station Tonawanda, NY 10 North Equalization Basin None None none UNRATED are not coal combustion waste impoundments

NRG Huntley Power, LLC

Huntley Electric Generating

Station Tonawanda, NY 10 South Equalization Basin None None none UNRATED are not coal combustion waste impoundments

NRG Huntley Power, LLC

Huntley Electric Generating

Station Tonawanda, NY 10 South Settling Pond System None None significant fair

Otter Tail Power Company Coyote Station Beulah, ND 10 Ash Pond None none UNRATED incised

Otter Tail Power Company Coyote Station Beulah, ND 10 Nelsen Pond None low poor

Otter Tail Power Company Coyote Station Beulah, ND 10 Sluice Pond None none UNRATED incised

PPL Generation, LLC

PPL Brunner Island Power

Station York Haven, PA 10 Ash Basin No.6 Less than Low category 3 (state) significant fair

PPL Generation, LLC

PPL Brunner Island Power

Station York Haven, PA 10 Equalization Pond None not assessed

PPL Generation, LLC

PPL Brunner Island Power

Station York Haven, PA 10

Industrial Waste Treatment

Basin Incidental Waste Treatment Basin None not assessed

Southern Illinois Power Coop Marion Plant Marion, IL 10 Coal Handling Ponds None Not Assessed

Southern Illinois Power Coop Marion Plant Marion, IL 10 Fly Ash Disposal Pond Low Not Assessed

Page 18 of 19
Company Facility Location Round

Survey Unit Name (Link

to existing DB) Assessment Unit Name

Hazard Rating from Survey

Database

State or Company

Equivalent Hazard

Potential Classification

Contractor-determined

Hazard Potential

Classification (if

different)*

EPA Condition

Assessment Comments/Notes

Southern Illinois Power Coop Marion Plant Marion, IL 10 Pond 1 None low (state) low poor

Southern Illinois Power Coop Marion Plant Marion, IL 10 Pond 2 None low (state) low poor

Southern Illinois Power Coop Marion Plant Marion, IL 10 Pond 3 None Not Assessed

Southern Illinois Power Coop Marion Plant Marion, IL 10 Pond 3A None Not Assessed

Southern Illinois Power Coop Marion Plant Marion, IL 10 Pond 4 None low (state) low poor

Southern Illinois Power Coop Marion Plant Marion, IL 10 Pond A-1 None Not Assessed

Southern Illinois Power Coop Marion Plant Marion, IL 10 Pond S-1 None Not Assessed

Southern Illinois Power Coop Marion Plant Marion, IL 10 Pond S-2 None Not Assessed

Southern Illinois Power Coop Marion Plant Marion, IL 10 Pond S-3 None Not Assessed

Southern Illinois Power Coop Marion Plant Marion, IL 10 Pond S-6 None Not Assessed

Southern Illinois Power Coop Marion Plant Marion, IL 10 South Fly Ash Pond Low Not Assessed

UGI Development Company Hunlock Power Station Hunlock Creek, PA 10 East Basin (003) None low poor

UGI Development Company Hunlock Power Station Hunlock Creek, PA 10 West Basin (005) None low poor

Xcel Energy NSP-W Bay Front Plant Ashland, WI 10 Polishing Pond Polishing Basin None None less than low satisfactory

Xcel Energy NSP-W Bay Front Plant Ashland, WI 10 Surge Basin None None less than low satisfactory

589 589 589 589 586

Help on count functions:

http://www.contextures.com/xlautofilter02.html

Condition Ratings*

# of Facilities # of Units Rated Satisfactory Fair Poor Unsatisfactory Sums

Round 1 22 43 22 15 6 0 43

Round 2 16 40 31 9 0 0 40

Round 3 15 37 15 12 10 0 37

Round 4 20 70 23 17 30 0 70

Round 5 17 38 15 14 9 0 38

Round 6 21 44 3 27 14 0 44

Round 7 24 56 34 10 12 0 56

Round 8 14 46 9 16 21 0 46

Round 9 23 51 29 18 4 0 51

Round 10 25 67 20 9 38 0 67

Totals: 197 492 201 147 144 0 492

Page 19 of 19