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Coal Combustion Residuals Impoundment Assessment Reports

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As part of the US Environmental Protection Agency’s ongoing national effort to assess the management of coal combustion residuals (CCR), EPA is releasing the final contractor reports assessing the structural integrity of impoundments and similar management units containing coal combustion residuals, commonly referred to as “coal ash,” at coal fired power plants. Most of the impoundments have been given hazard potential ratings (e.g. less than low, low, significant, high) by the state, EPA contractor, or company which are not related to the stability of the impoundments but to the potential for harm should the impoundment fail. For example, a “significant” hazard potential rating means impoundment failure can cause economic loss, environmental damage, or damage to infrastructure.

EPA has assessed all of the known units with a dam hazard potential rating of “high” or “significant” as reported in the responses provided by electric utilities to EPA’s information requests and additional units identified during the field assessments. EPA will release additional reports as they become available.

The reports being released now have been completed by contractors who are experts in the area of dam integrity, reflect the best professional judgment of the engineering firm, and are signed and stamped by a professional engineer. The reports are based on a visual assessment of the site, interviews with site personnel, and the review of geotechnical reports and studies related to the design, construction and operation of those impoundments, if available. The engineering firms also reviewed past state/federal inspections of the impoundments. EPA contractors were not authorized to conduct any physical drilling, coring or sampling while on site; however, they did review studies which may have included such information. These reports include complex engineering evaluations and use terms which may be unfamiliar to the general public. Also, the contractors were asked to rate the impoundments as “satisfactory,” “fair,” “poor,” or “unsatisfactory,” terms commonly used in the field of dam safety. Expert experience has shown that only impoundments rated as “unsatisfactory” pose immediate safety threats. None of the impoundments assessed so far have received an “unsatisfactory” rating. Impoundment ratings noted in the reports should be taken in the proper context, since a unit may be found to be structurally sound while it may receive a fair or poor rating based on other factors such as lack of information.

Draft copies of these reports have been reviewed by the facilities and the states for factual accuracy and their comments on the draft reports have also been posted. EPA continues to review the reports and the technical recommendations, and is working with the facilities to ensure that the recommendations are implemented.

EPA has provided a copy of the final report to each facility and has requested that the facility implement the recommendations in the reports and provide plans for taking action. These plans are being posted below as they become available. Should facilities fail to take sufficient measures, EPA will take additional action, if the circumstances warrant, and will be devoting special attention to those facilities receiving a “poor” rating.

Ratings summary for the assessments:

  First
Round		 Second
Round		 Third
Round		 Fourth
Round		 Fifth
Round		 Sixth
Round		 Seventh
Round		 Eighth
Round		 Ninth
Round		 Tenth
Round
Satisfactory 22 31 15 23 15 3 34 9 29 20
Fair 15 9 12 17 14 27 10 16 18 9
Poor 6 0 10 30 9 14 12 21 4 38
Unsatisfactory 0 0 0 0 0 0 0 0 0 0
Total number of units 43 40 37 70 38 44 56 46 51 67

The companies in the table below have at some point claimed some information they have provided to the EPA related to their coal ash impoundments is confidential business information (CBI). While EPA reviews these claims, the information that is claimed as CBI is not posted to EPA’s website. If these claims are accepted by the EPA, the coal ash reports will be posted in redacted form. If EPA denies these claims, all the information will be made publicly available and posted to this website.

CBI Claims
Company that Claims CBI EPA’s Determination on CBI Claim
Alabama Power Company
– Barry Power Station
– Ernest C Gaston Power Station
– Gadsden Power Station
– Gorgas Power Station
– Greene County Power Station
– James H Miller Power Station
In Process
In Process
In Process
In Process
In Process
In Process
Ameren UE
– Coffeen Power Station
– Duck Creek Power Station
– ED Edwards Power Station
– Hutsonville Power Station
– Labadie Power Station
– Meramec Power Station
– Meredosia Power Station
– Newton Power Station
– Sioux Power Station
– Rush Island Power Station
In Process
In Process
In Process
In Process
In Process
In Process
In Process
In Process
In Process
In Process
Duke Energy Corporation Denied

Eastern Kentucky Power Cooperative, Inc
– Dale Power Station
– HL Spurlock Station


In Process
In Process
First Energy Generation Corporation
– Little Blue Run Dam
Denied
Georgia Power Company
– Bowen Power Station
– McIntosh Power Station
– Plant Branch or Harlee Branch Power Station
– Plant Hammond
– Plant Kraft
– Plant Mitchell
– Plant Yates
– Plant McDonough
– Plant Scherer
– Wansley Power Station
In Process
In Process
In Process
In Process
In Process
In Process
In Process
In Process
In Process
In Process
Gulf Power Company
– Lansing Smith Power Station
In Process
Mississippi Power Company
– Plant Jack Watson
In Process
Northern Indiana Public Service Company (NIPSCO)
– RM Schahfer Power Plant
In Process

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Reports

Summary Table for Impoundment Reports (XLS) – April 10, 2013 (Download the free Microsoft Excel Viewer)

ABCDE FGHIJ KLMNO PQRST UVWXY Z
Reports Key

A

Alabama Power Company – William Crawford Gorgas Electric Generating Plant

Alabama Power Company – Barry Plant

Alabama Power Company – EC Gaston Facility

Alabama Power Company – Greene Facility

Allegheny Energy – Pleasants Power Station

Allegheny Energy – R Paul Smith Station

Allete – Boswell Energy Center

Allete – Laskin Energy Center

Alliant Energy – Burlington Generating Station

Alliant Energy – Columbia Power Station

Alliant Energy – Edgewater Generating Station

Alliant Energy – Lansing Generating Station

Alliant Energy – ML Kapp Power Station

Alliant Energy – Nelson-Dewey Generating Station

Alliant Energy – Rock River Generating Station

Alliant Energy – Sixth Street Generating Station

Alliant Energy – Sutherland Generating Station

Alliant Energy – Ottumwa Generating Station

Ameren – Coffeen Facility

Ameren – Duck Creek Facility

Ameren – ED Edwards Facility

Ameren – Hutsonville Power Station

Ameren / Electric Energy Inc. – Joppa Plant

Ameren – Labadie Power Station

Ameren – Meramec Power Station

Ameren – Meredosia Facility

Ameren – Newton Facility

Ameren – Rush Island Power Station

Ameren – Sioux Power Station

American Electric Power – Big Sandy Power Plant

American Electric Power – Cardinal Power Plant

American Electric Power – Clinch River Plant

American Electric Power – Conesville Generating Station

American Electric Power – General James Gavin Power Plant

American Electric Power – Glen Lyn Plant

American Electric Power – John E Amos Power Plant

American Electric Power – Mitchell Power Plant

American Electric Power – Mountaineer Power Plant

American Electric Power – Muskingum Power Plant

American Electric Power – Picway Generating Station

American Electric Power – PSC of OK – Northeastern 3 and 4 Plant

American Electric Power – PSC of OK – Oklaunion Power Station

American Electric Power – Philip Sporn Generating Plant

American Electric Power – Rockport Power Plant

American Electric Power – Southwestern Electric Power Co – Flint Creek Power Station

American Electric Power – Southwestern Electric Power Co – Pirkey Power Station

American Electric Power – Tanner Creek Facility

American Electric Power – Welsh Plant

Arizona Electric Power Coop Inc. – Apache Power Station

Arizona Public Service – Cholla Power Station

Arizona Public Service – Four Corners Power Station

Associated Electric Cooperative – New Madrid Power Plant

Associated Electric Cooperative – Thomas Hill Energy Center

Top of Page | Top of Report Results

B

Basin Electric Power Cooperative – Antelope Valley Station

Basin Electric Power Cooperative – Laramie Power Station

Basin Electric Power Cooperative – Leland Olds Power Station

Big Rivers Electric Cooperative – Coleman Generating Station

Big Rivers Electric Cooperative – Reid/Green/HMPL

Top of Page | Top of Report Results

C

City of Independence (MO) – Blue Valley Power Station

City of Sikeston (MO) – Sikeston Power

City of Springfield (IL) – Dallman Power Station

Cleco Power LLC – Brame Energy Center (formerly Rodemacher Power Station)

Cleco Power LLC – Dolet Hills Power Station

Coleto Creek Power

Consumers Energy – DE Karn Plant

Consumers Energy – JC Weadock Plant

Consumers Energy – JR Whiting Plant

Top of Page | Top of Report Results

D

Dayton Power and Light – JM Stuart Station

Dayton Power and Light – OH Hutchings Generating Station

Dayton Power and Light – Killen Electric Generating Station

Detroit Edison Company – Monroe Power Plant

Dominion – Bremo Power Station

Dominion – Chesapeake Energy Center

Dominion – Chesterfield Power Station

Dominion – Kincaid Generation

Dominion – Possum Point Power Station

Duke Energy Carolinas – Allen Steam Station

Duke Energy Carolinas – Belews Creek Steam Station

Duke Energy Carolinas – Buck Steam Station

Duke Energy Carolinas – Dan River Steam Station

Duke Energy Carolinas – Lee Steam Station

Duke Energy Carolinas – Marshall Steam Station

Duke Energy Carolinas – Riverbend Power Station

Duke Energy Corporation – Cliffside Steam Station

Duke Energy Corporation – East Bend Station

Duke Energy Corporation – Edwardsport Plant

Duke Energy Corporation – Gallagher Generating Station

Duke Energy Corporation – Miami Fort Generating Station

Duke Energy Corporation – Wabash River Generating Station

Duke Energy Corporation – WC Beckjord Generating Station

Duke Energy Corporation – WH Zimmer Station

Duke Energy Indiana – Cayuga Generating Station

Duke Energy Indiana – Gibson Generating Station

Dynegy Midwest Generation, Inc. – Baldwin Power Station

Dynegy Midwest Generation, Inc. – Havana Power Station

Dynegy Midwest Generation, Inc. – Hennepin Power Station

Dynegy Midwest Generation, Inc. – Vermilion Power Station

Dynegy Midwest Generation, Inc. – Wood River Power Station

Top of Page | Top of Report Results

E

Eastern Kentucky Power Cooperative – Dale Power Station

Edison International – Homer City Generating Station

Empire District Electric Company – Asbury Power Station

Empire District Electric Company – Riverton Generating Station

E.ON – Kentucky Utilities – EW Brown Plant

E.ON – Kentucky Utilities – Ghent Generating Station

E.ON – Louisville Gas & Electric Co. – Mill Creek Station

E.ON – Louisville Gas & Electric Co. – Cane Run Station

Top of Page | Top of Report Results

F

First Energy Generation Corporation – Bruce Mansfield Power Plant

First Energy Generation Corporation – Bruce Mansfield Power Plant – Little Blue Run Dam

First Light Power Resources – Mount Tom Generating Station

Top of Page | Top of Report Results

G

Georgia Power – Plant Bowen

Georgia Power – Plant Branch

Georgia Power – Plant Hammond

Georgia Power – Plant McDonough

Georgia Power – Plant Mitchell

Georgia Power – Plant Scherer

Georgia Power – Plant Wansley

Georgia Power – Plant Yates

Great River Energy – Coal Creek Station

Great River Energy – Stanton Station

Gulf Power Company – Lansing Smith Power Station

Top of Page | Top of Report Results

H

Hoosier Energy – Frank E Ratts Generating Station

Top of Page | Top of Report Results

I

Indiana-Kentucky Electric Corp. – Clifty Creek Power Station

Indianapolis Power & Light – Eagle Valley Generating Station

Indianapolis Power & Light – Harding Street Generating Station

Indianapolis Power & Light – Petersburg Generating Station

Intermountain Power Project – Intermountain Generating Station

Top of Page | Top of Report Results

J – no entries

Top of Page | Top of Report Results

K

Kansas City Board of Public Utilities – Nearman Creek Power Station

Kansas City Power & Light – Lake Road Generating Station

Kansas City Power & Light – La Cygne Generating Station

Kansas City Power & Light – Montrose Generating Station

Kansas City Power & Light – Sibley Generating Station

Kentucky Utilities – Green River Station

Kentucky Utilities – Pineville Generating Station

Kentucky Utilities – Tyrone Generating Station

Top of Page | Top of Report Results

L

Lansing Board of Water & Light – Erickson Station

Louisiana Generating LLC – Big Cajun II

Louisville Gas and Electric Power – Trimble County Generating Station

Lower Colorado River Authority – Fayette Power Project

Top of Page | Top of Report Results

M

Mid American Energy Company – George Neal North Energy Center

Mid American Energy Company – Louisa Generating Station

Mid American Energy Company – Riverside Generating Station

Mid American Energy Company – Walter Scott Junior Energy Center

Minnkota Power Cooperative – Milton R Young Power Station

Mississippi Power – Plant Jack Watson

Top of Page | Top of Report Results

N

NIPSCO (Northern Indiana Public Service Co) – Bailly Generating Station

NIPSCO – Michigan City Generating Station

NIPSCO – DH Mitchell Generating Station

NIPSCO – RM Schahfer Power Plant

Northern States – Sherburne County Power Station

NRG Energy – Huntley Generating Station

NRG Texas Power – Limestone Generating Station

NV Energy – Reid Gardner Generating Facility

Top of Page | Top of Report Results

O

Ohio Valley Electric – Kyger Creek Power Station

Otter Tail Power – Coyote Power Station

Top of Page | Top of Report Results

P

PacifiCorp Energy – Dave Johnston Power Station

PacifiCorp Energy – Jim Bridger Power Station

PacifiCorp Energy – Naughton Power Station

PacifiCorp Energy – Wyodak Power Station

PowerSouth Energy Cooperative – Lowman Power Station

PPL Generation LLC – Brunner Island Power Station

PPL Generation LLC – Martin's Creek Electric Station

PPL Montana LLC – Colstrip Power Plant

Progress Energy Carolinas – Asheville Power Station

Progress Energy Carolinas – Cape Fear Power Station

Progress Energy Carolinas – HB Robinson

Progress Energy Carolinas – LV Sutton

Progress Energy Carolinas – Lee Power Station

Progress Energy Carolinas – Mayo Power Station

Progress Energy Carolinas – Roxboro Power Station

Progress Energy Carolinas – WH Weatherspoon Steam Electric Plant

Top of Page | Top of Report Results

Q – no entries

Top of Page | Top of Report Results

R – no entries

Top of Page | Top of Report Results

S

Salt River Project – Coronado Power Station

Santee Cooper – Cross Power Station

Santee Cooper – Grainger Generating Station

Santee Cooper – Jefferies Generating Station

Santee Cooper – Winyah Generating Station

South Carolina Electric and Gas – Canadys Steam Power Station

South Carolina Electric and Gas – Urquhart Generating Station

South Carolina Electric and Gas – Wateree Generating Station

Southern Illinois Power Cooperative – Marion Power Station

Sunbury Generation LP

Top of Page | Top of Report Results

T

Tampa Electric Company – Big Bend Power Station

Tri-State Generation and Transmission Association Inc. – Escalante Power Station

Top of Page | Top of Report Results

U

UGI Development – Hunlock Creek Power Station

Top of Page | Top of Report Results

V

Vectren – AB Brown Power Station

Vectren – FB Culley Power Generating Station

Top of Page | Top of Report Results

W

Westar Energy – Jeffrey Energy Center

Westar Energy – Lawrence Energy Center

Westar Energy – Tecumseh Energy Center

Western Farmers Electric Cooperative – Hugo Power Station

Top of Page | Top of Report Results

X

Xcel Energy – Black Dog Power Station

Xcel Energy – Bay Front Power Station

Top of Page | Top of Report Results

Y – no entries

Top of Page | Top of Report Results

Z – no entries

Top of Page | Top of Report Results

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