# Coal Combustion Residuals Impoundment

Assessment Reports

As part of the U.S. 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 facilities. Most of the impoundments

have a “high” or “significant” hazard potential rating. The hazard potent ial rating is not related to the

stability of those 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 da mage 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 has not yet assessed TVA units

– these will b e done

on a separate schedule.) EPA will release additional reports as they become available. Posted below

are the final reports.

The reports being released now have been completed by contractors who are experts in the area of

dam integrity, reflect the be st 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

impou ndments 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 s o 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 lac k 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 taki ng 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

Satisfactory 22 31 15

Fair 15 9 12

Poor 6 0 10

Unsatisfactory 0 0 0

Total number of units 43 40 37

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 redacted (removed) from the coal ash

report s. If these claims are accepted by the EPA, the information will remain redacted. If EPA denies

these claims, the information will be made publicly available and posted to this website.

The public should be aware that Southern Company subsidiaries (Georgi a Power and Alabama Power)

have informed the Agency that major portions of their draft and final EPA assessment reports contain

CBI information; as a result, the Agency will review and make a determination on these CBI claims

after requesting further subst antiation. The Agency will release redacted (edited) versions of these

reports. Southern Company is taking a legally allowable position, however, it should be noted that no

other utility company has taken a similar position with regard to the release of EP A's draft and final

site assessment reports.

CBI Claims

Company that Claims CBI EPA’ Determination

on CBI Claim

Alabama Power Company

- Gorgas Power Station In Process

Duke Energy Corporation Denied

First Energy Generation Corporation

-

Little Blue Run Dam Denied

Georgia Power Company

- Bowen Power Station

- Plant Branch or Harlee Branch Power Station In Process

In Process

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

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

Kohler ( kohler.james@epa.gov , 703

- 347

- 8953), Jana Englander ( englander.jana@epa.gov , 703

- 30 8

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

- 308

- 9037).

You will need Adobe Reader to view some of the files on this page. See EPA's PDF page to lear n more.NOTE: Documents open faster if your browser is open. If you have problems accessing documents

from the following links, you can either right

- click on the link, copy the link location, and paste it into

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

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



# Reports

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



# A

Alabama Power Company

- William Crawford Gorgas Electric Generating Plant

Cover Letter (PDF) (3 pp, 874K)

Comments (PDF) (10 pp, 130K)

Draft Report (PDF) (67 pp, 4MB)

Final Report (PDF) (69 pp, 5MB)

Company Response/Action Plan (PDF) (2 pp, 46K)

Allegheny Energy

- Pleasants Power Station

Cover Letter (PDF) (4 pp, 2 5K)

Comments (PDF) (16 pp, 3MB)

Draft Report (P DF) (83 pp, 6MB)

Final Report (PDF) (83 pp, 6MB)

Allegheny Energy

- R Paul Smith Station

Cover Letter (PDF) (4 pp, 23K)

Comments (PDF) (25 pp, 2MB)

Draft Report (PDF) (91 pp, 13MB)

Final Report (PDF) (91 pp, 7MB)

American Electric Power

- Big Sandy Pow er Plant

Cover Letter (PDF) (4 pp, 23K)

Comments ( PDF) (10 pp, 67K)

Draft Report (PDF) (125 pp, 11MB)

Final Report (PDF) (125 pp, 10MB)

American Electric Power

- Cardinal Power Plant

Cover Letter (PDF) (4 pp, 25K)

Comments (PDF) (6 pp, 54K)

Draft Report (PDF) (149 pp, 56MB)

Final Report (PDF) (149 pp, 55MB)

Company Response/Ac tion Plan (PDF) (6 pp, 52K)

American Electric Power

- Conesville Generating Station

Cover Letter (PDF) (5 pp, 26K)

Comments (PDF) (11 pp, 255K)

Draft Report (PDF) (85 pp, 6MB)

Final Report (PDF) (86 pp, 6MB)

American Electric Power

- General James Gavin Power Plant

Cover Letter (PDF) (4 pp, 1.5MB)

Comments (PDF) (19 pp, 195K)

Draft Report (PDF) (109 pp, 18MB)

Final Report (PDF) (111 pp, 19MB)

Company Response/Action Plan (PDF) (8 pp, 266K)

American Electric Power

- John E Amos Power Plant

Cover Let ter (PDF) (4 pp, 31K)

Comments (PDF) (2 pp, 22K)

Draft Report Bottom Ash (PDF) (43 pp, 3MB)

Final Report Bottom Ash (PDF) (37 pp, 22MB)

Draft Report Fly Ash (PDF) (35 pp, 2MB)

Final Report Fly Ash (PDF) (45 pp, 3MB)Company Response/Action Plan (PDF) (978 pp, 65MB)

American Electric Power

- Mitchell Power Plant

Cover Letter (PDF) (3 pp, 20K)

Comments (PDF) (2 pp, 22K)

Draft Report (PDF) (160 pp, 35MB)

Final Report (PDF) (159 pp, 27MB)

Company Response/Action Plan (PDF) (2 pp, 31K)

American Electric Power

- Mountaineer Power Plant

Cover Letter (PDF) (3 pp, 21K)

Comments (PDF) (2 pp, 19K)

Draft Report (PDF) (39 pp, 7MB)

Final Report (PDF) (39 pp, 4MB)

Company Response/Action Plan (PDF) (3 pp, 36K)

American Electric Power

- Muskingum Power Plant

Cover Letter (PDF) (6 pp, 30K)

Comments (PDF) (18 pp, 485K)

Draft Repo rt (PDF) (182 pp, 10MB)

Final Report (PDF) (181 pp, 12MB)

American Electric Power

- Philip Sporn Generating Plant

Additional Information Regarding AEP's Philip Sporn Power Plant in New Haven, West

Virginia

Cover Letter (PDF) (1 pp, 16K)

Comments (PDF) (7 pp, 91K)

Draft Report (PDF) (88 pp, 8M)

Final Report (PDF) (97 pp, 7M)

AEP Response to Recommendations (PDF) (173 pp, 10M)

AEP Supplemental Information (PDF) (10 pp, 760K)

Evaluation of AEP Response (PDF) (6 pp, 75K)

Information Request Letter ( PDF) (10 pp, 456K)

Information Request Letter Modification (PDF) (1 pp, 39K)

American Electric Power

- Tanner Creek Facility

Cover Letter (PDF) (3 pp, 914K)

Comments

- Bottom Ash and Fly Ash (PDF) (3 p p, 28K)

Draft Report Bottom Ash (PDF) (40 pp, 27MB)

Final Report Bottom Ash (PDF) (40 pp, 6MB)

Draft Report Fly Ash (PDF) (54 pp, 31MB)

Final Report Fly Ash (PDF) (44 pp, 7MB)

Company Response/Action Plan (PDF) (2 pp, 290K)

Arizona Electr ic Power Coop Inc.

- Apache Power Station

Comments (PDF) (22 pp, 4.5MB)

Draft Report (PDF) (157 pp, 24MB)

Final Report (PDF) (159 pp, 24MB) '

Supplemental Information (PDF) (14 pp, 4MB)

Company Response/Action Plan (PDF) (6 pp, 852K)

Arizona Public Service Co.

- Cholla Power Station

Cover Letter (PDF) (4 pp, 23K)

Comments (PDF) (7 pp, 468K)

Draft Report (PDF) (167 pp, 29MB)

Final Report (PDF) (150pp, 28MB)

Company Response/Action Plan (PDF) (5 pp, 3.5MB)

Arizona Public Service Co.

- Four Corners Pow er Station

Cover Letter (PDF) (3 pp, 948K)

Comments (P DF) (13 pp, 754K)

Draft Report (PDF) (43 pp, 434K)

F inal Report (PDF) (125 pp, 13MB)

Company Response/Action Plan (PDF) (4 pp, 119K)

# B

Big Rivers

- Coleman Generating Station

Cover Letter (PDF) (4 pp, 24K)

Comments (PDF) (9 pp, 264K)

Draft Report (PDF) (77 pp, 6MB)

Final Report (PDF) (77 pp, 6MB)

Big Ri vers

- Reid/Green/HMPL

Cover Letter (PDF) (4 pp, 24K)

Comments (PDF) (7 pp, 110K)

Draft Report (PDF) (55 pp, 5MB)

Final Report (PDF) (55 pp, 5MB)

Company Response/Action Plan (PDF) (4 pp, 119K)



# C

- no entries

D

Dayton Power and Light

- JM Stuart

Cover Letter (PDF) (2 pp, 17K)

Comments (PDF) (24 pp, 354K)

Draft Report (PDF) (139 pp, 10MB)

Final Report (PDF) (168 pp, 8MB)

Duke Energy Carolinas

- Allen Steam Station

Cover Letter (PDF) (3 pp, 856K)

Comments (PDF) (5 pp, 93K)

Draft Report (PDF) (68 pp, 16MB)

Final Report (PDF) (71 pp, 22MB)

Company Response/Action Plan (PD F) (35 pp, 157K)

Duke Energy Carolinas

- Belews Creek Steam Station

Cover Letter (PDF) (4pp, 24K)

Comments (PDF) (6 pp, 283K)

Draft Report (PDF) (70 pp, 6MB)

Final Report (PDF) (70 pp, 7MB)

Company Response/Action Plan (PDF) (5 pp, 1. 4MB)

Duke Energy Carolinas

- Buck Steam Station

Cover Letter (PDF) (7pp, 2MB)

Comments (PDF) (12 pp, 171K)

Draft Report (PDF) ( 156 pp, 36MB)

Final Report (PDF) (158 pp, 36MB)

Company Response/Action Plan (PDF) (7 pp, 82K)

Duke Energy Carolinas

- Dan River Steam Station

Cover Letter (PDF) (4 pp, 1MB)

Comments (PDF) (4 pp, 27K)

Draft Report (PDF) (111 pp, 20MB)

Final Report (PDF) (133pp, 22MB)

Company Response/Action Plan (PDF) (4 pp, 663K)

Duke Energy Carolinas

- Marshall Steam Statio n

Cover Letter (PDF) (4 pp, 976K)

Comments (PD F) (6 pp, 160K)

Draft Report (PDF) (67 pp, 27MB)

Final Report (PDF) (68 pp, 29MB)

Company Response/Action Plan (PDF) (4 pp, 170K)

Duke Energy Carolinas

- Riverbend Power Station

Cover Letter (PDF) (4 pp, 1MB)Comments (PDF) (13 pp, 63)

Draft Report (PDF) (91 pp, 10MB)

Final Report An notation Memo (1 pp, 7K)

Final Report (PDF) (92 pp, 5MB)

Company Response/Action Plan (PDF) (5 pp, 125K)

Duke Energy Corporation

- Miami Fort Generating Station

Cover Letter (PDF) (4 pp, 24K)

Comments (PDF) (8 pp, 288K)

Draft Report (PDF) (91 pp, 6MB)

Final Report (PDF) (91 pp, 6MB)

Duke Energy Corporation

- W.C. Beckjord Generating Station

Cover Letter (PDF) (4 pp, 24K)

Comments (PDF) (14 pp, 400K)

Draft Report (PDF) (170 pp, 9MB)

Final Report (PDF) (200 pp, 12MB)

Dynegy Midwest Generation, Inc.

- Havana Power Station

Cover Letter (PDF) (2 pp, 436K)

Comments (PDF) (15 pp, 2MB)

Draft Report (PDF) (26 pp, 2MB)

Final Report (PDF) (32 pp, 4MB)

Final Report Appendices (PDF) (414 pp, 38MB)

Company Response/Action Plan (PDF) (2 pp, 27K)

Dynegy Midwest Generation, Inc.

- Wood River Power Station

Cover Letter (PDF) (2 pp, 433K)

Comments (PDF) (27 pp, 804K)

Draft Report (PDF) (25 pp, 464K)

Final Report (PDF) (31 pp, 617K)

Final Report Appendices (PDF) (666 pp, 66MB)

Company Response/Action Plan (PDF) (1 pp, 7K)



# E

E.ON

- Kentucky Utilities

- E.W. Brown P lant

Cover Letter (PDF) (4 pp, 20K)

Comments (PDF) (23 pp, 328K)

Ash Draft Report (PDF) (37 pp, 2MB)

Ash Final Report (PDF) (386 pp, 94MB)

Auxillary Draft Report (PDF) (32 pp, 3MB)

Auxillary Final Report (PDF) (360 pp, 344MB)

E.ON

- Kentucky Utilities

- Ghent Generating Station

Cover Letter (PDF) (4 pp, 24K)

Comments (PDF) (9 pp, 261K)

Draft Report (PDF) (141 pp, 19MB)

Final Report (PDF) (141 pp, 19MB)

E.ON

- Louisville Gas & Electric Co.

- Mi ll Creek Station

Cover Letter (PDF) (4 pp, 23K)

Comments (PDF) (6 pp, 104K)

Draft Report (PDF) (44 pp, 4MB)

Final Report (PDF) (44 pp, 4MB)

Company Response/Action Plan (PDF) (2 pp, 600K)

E.ON

- Louisville Gas & Electric Co.

- Cane Run Stati on

Cover Letter (PDF) (4 pp, 23K)

Comments (PDF) (2 29 pp, 29MB)

Draft Report (PDF) (82 pp, 5MB)

Final Report (PDF) (84 pp, 5MB)

# F

First Energy Generation Corporation

- Bruce Mansfield Power Plant

Cover Letter (PDF) (3 pp, 20K)

Comments (PDF) (1 pp, 14K)

Draft Report (PDF) (78 pp, 8MB)

Final Report (PDF) (79 pp, 5MB)

Supplemental Checklists (PDF) (28 pp, 265K)

Supplemental Inspections (PDF) (101 pp, 16MB)

Comp any Response/Action Plan (PDF) (3 pp, 31K)

First Energy Generation Corporation

- Bruce Mansfield Power Plant

- Little Blue Run Dam

Cover Letter

- Little Blue Run Dam (PDF) (4 pp, 25K)

Comments

- Little Blue Run Dam (PDF) (194 pp, 27K)

Draft Report

- Little Blue Run Dam (PDF) (90 pp, 17MB)

Final Report

- Little Blue Run Dam (PDF) (93 pp, 7MB)



# G

Georgia Power

- Plant Bowen

Cover Letter (PDF) (3 pp, 834K)

Co mments (PDF) (21 pp, 688K)

Draft Report (PDF) (93 pp, 21MB)

Final Report (PDF) (59 pp, 3MB)

Company Response/Action Plan (PDF) (3 pp, 139K)

Georgia Power

- Plant Branch

Cover Letter (PDF) (5 pp, 27K)

Redacted Final Report (PDF) (188 pp, 3MB)



# H

- no entries

I

Indiana

- Kentucky Electric Corp.

- Clifty Creek Power Station

Cover Letter (PDF) (5 pp, 2MB)

Comments Bottom Ash Pond (PDF) (9 pp, 138K)

Comments Fly Ash Pond (PDF) (10 pp, 138K)

Draft Report Bottom Ash Pond (PDF) (60 pp, 8MB)

Final R eport Bottom Ash Pond (PDF) (62 pp, 9MB)

Draft Report Fly Ash Pond (PDF) (65 pp, 8MB)

Final Report Fly Ash Pond (PDF) (66 pp, 9MB)

Company Response/Action Plan (PDF) (5 pp, 80K)



# J

- no entries

K

- no entries

L

Louisville Gas and Electric Power

- Trimble County Generating Station

Cover Letter (PDF) (4 pp, 1MB)

Comments (PDF) (19 pp, 100K)

Draft Report (PDF) (63 pp, 40MB)Final Report (PDF) (63 pp, 9MB)

Company Response/Action Plan (PDF) (2 p p, 521K)



# M

- no entries

N

Northern States

- Sherburne County Power Station

Cover Letter (PDF) (4 pp, 23K)

Comments (PDF) (10 pp, 839K)

Draft Report (PDF) (151 pp, 16MB)

Final Report (PDF) (149 pp, 9MB)

Company Response/Action Plan (PDF) (7 pp, 2MB)



# O

- no entries

Ohio Valley Electric

- Kyger Creek Power Station

Cover Letter (PDF) (3 pp, 21K)

Comments (PDF) (8 pp, 248K)

Draft Report (PDF) (93 pp, 12MB)

Final Report (PDF) (93 pp, 19MB)



# P

PacifiCorp Energy

- Jim Bridger Power Station

Cover Letter (PDF) (4 pp, 1MB)

Comments (PDF) (9 pp, 418K)

Draft Report (PDF) (42 pp, 400K)

Final Report (PDF) (121 pp, 18MB)

Company Response/Action Plan (PDF) (5 pp, 68K)

PacifiCorp Energy

- Naughton Power Station

Cover Letter (PDF) (4 pp, 23K)

Comments (PDF) (9 pp, 116K)

Draft Report (PDF) (152 pp, 31MB)

Final Report (PDF) (152 pp, 31MB)

Company Response/Action Plan (PDF) (3 pp, 1MB)

PPL Generation, LLC

- Martins Creek Electric Station

Cover Letter (PDF) (5 pp, 25K)

Comments (PDF) (4 pp, 25K)

Draft Repo rt (PDF) (109 pp, 14MB)

Final Report (PDF) (109 pp, 28MB)

Supplemental Information (PDF) (941 pp, 70MB)

Company Response/Action Plan (PDF) (3 pp, 17K)

PPL Montana, LLC

- Colstrip Steam Electric Station

Cover Letter (PDF) (5 pp, 2MB)

Comme nts (PDF) (21 pp, 4MB)

Draft Report (PDF) (57 pp, 502K)

Final Report (PDF) (171 pp, 14MB)

Company Response/Action Plan (PDF) (35 pp, 157K)

Progress Energy

- Asheville Power Station

Cover Letter (PDF) (4 pp, 1MB)

Comments (PDF) (1 pg, 1 1K)

Draft Report (PDF) (30 pp, 380K)

Draft R eport Appendices (142 pp, 47MB)Final Report (PDF) (36 pp, 565K)

Final Report Appendices (142 pp, 47MB)

Company Response/Action Plan (PDF) (4 pp, 104K)

Progress Energy

- Cape Fear Power Stat ion

Cover Letter (PDF) (5 pp, 2MB)

Comments (PDF) (16 pp, 1MB)

Draft Report (PDF) (150 pp, 32MB)

F inal Report (PDF) (152 pp, 33MB)

Company Response/Action Plan (PDF) (8 pp, 390K)

Progress Energy

- Mayo Power Station

Cover Letter (PDF) (3 pp, 736K)

Comments (PDF) (2 pp, 911K)

Draft Report (PDF) (23 pp, 138K)

Draft Report Appendices (PDF) (121 pp, 18MB)

Final Report (PDF) (29 pp, 312K)

Final Report Appendi ces (PDF) (127 pp, 18MB)

Company Response/Action Plan (PDF) (3 pp, 74K)

Progress Energy

- Roxboro Power Station

Cover Letter (PDF) (3 pp, 21K)

Comments (PDF) (17 pp, 2MB)

Draft Report (PDF) (89 pp, 8MB)

Final Report (PDF) (88 pp, 7MB)

Supplemental Information (PDF) (29 pp, 316K)

Company Response/Action Plan (PDF) (2 pp, 119K)



# Q

- no entries

R

- no entries

S

Salt River Project

- Coronado Power Station

Cover Letter (PDF) (4 pp, 25K)

Comments (PDF) (5 pp, 166K)

Draft Report (PDF) (100 pp, 46MB)

Final Report (PDF) (109 pp, 47MB)

Company Response/Ac tion Plan (PDF) (6 pp, 804K)



# T

Tri

- State Generation and Transmission Association Inc.

- Escalante Power Station

Cover Letter (PDF) (2 pp, 494K)

Comments (PDF) (52 pp, 14MB)

Draft Report (PDF) ( 52 pp, 14MB)

Final Report (PDF) (53 pp, 14MB)

Company Response/Action Plan (PDF) (1 pp, 7K)



# U

- no entries

VVectren

- AB Brown Power Station

Cover Letter (PDF) (4 pp, 1.3MB)

Comments

- Upper and Lower Ash (PDF) (5pp, 606K)

Dra ft Report Lower Ash (PDF) (37 pp, 7.8MB)

Final Report Lower Ash (PDF) (38 pp, 13MB)

Draft Report Upper Ash (PDF) (35 pp, 16MB)

Final Report Upper Ash (PDF) (36 pp, 16MB)

Company Response/Action Plan (PDF) (3 pp, 541K)



# W

Westar Energy

- Jeffrey Energy Center

Cover Letter (PDF) (5 pp, 1MB)

Comments (PDF) (49 pp, 992K)

State Comments (PDF) (2pp, 82K)

Draft Report (PDF) (47 pp, 452K)

Final Report (PDF) (116 pp, 10MB)

Company Response/Action Plan (PD F) (2 pp, 489K)



# X

- no entries

Y

- no entries

Z

- no entries