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Information Request Responses from Electric Utilities

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Responses From Electric Utilities to EPA Information Request Letter

EPA has received responses to Information Requests (IR) sent out in March, April and December of 2009. * Posted below are all of the responses covering 240 facilities and 676 surface impoundments and similar management units, with the exception of information claimed as confidential business information. EPA will review all confidential business information claims and will post all information that is determined not to meet confidential business information criteria. Additional facility responses will be posted on this page as EPA completes a quality review.

The 240 facilities that responded to EPA’s information request have 676 surface impoundments and similar management units; 214 units (32 percent) have been given a hazard potential rating using the National Inventory of Dams criteria. Of the 214 units that have been rated, 45 units (21 percent) are rated as High Hazard Potential; 84 units (39 percent) are rated as Significant Hazard Potential; 74 units (35 percent) are rated as Low Hazard Potential; and 11 units (5 percent) are rated as Less than Low Hazard Potential. Of the total 676 units, 462 units (68 percent) have not received a hazard potential rating. The hazard potential ratings do not assess the stability of these units; the ratings assess the potential for loss of life or environmental and economic damage. Units rated as High Potential Hazard are those where failure will probably cause loss of life.

Of the 676 surface impoundments and similar units covered in these responses, 483 (71 percent) were designed by a professional engineer. The units show considerable variation in height, with 86 units (13 percent) being reported as greater than or equal to 50 feet in height; 156 units (23 percent) being reported as greater than or equal to 25 feet, but less than 50 feet in height; 286 units (42 percent) being reported as greater than or equal to 5 feet, but less than 25 feet in height; 17 units (3 percent) being reported as greater than 0 feet, but less than 5 feet in height; and 131 units (19 percent) being reported as having no height (at or below grade).

A majority of the information contained in the company responses has been inserted into a database. All the fields and entries in this database have been extracted and presented below in PDF and Microsoft Excel spreadsheets which enable users to easily search for aggregate or facility-specific information.

*We will likely be sending out more information requests in the future as new impoundments are identified. As we receive new information, the numbers below will be updated accordingly. We previously reported a total of 228 facilities with 629 surface impoundments; these numbers have changed as a result of new information.

The companies in the table below have at some point claimed their responses contained confidential business information (CBI). While EPA reviews these claims, the information that is claimed as CBI is redacted (removed) from the coal ash survey results and survey responses from these companies. Reference to this information is also removed from the coal ash reports. If these claims are accepted by the EPA, the information will remain redacted. If EPA denies these claims, the information will be posted.

CBI Claims
Company that Claims CBI Survey Question(s)
Claimed
Confidential
EPA’ Determination
on CBI Claim
Alabama Power Company
- Barry Power Station
- Gadsden Power Station
- Gorgas Power Station
- Greene County Power Station
- James H. Miller Jr Power Station
- Earnest C. Gaston Electric Generating Plant

5, 6, 7, 8
5, 6, 7, 8
5, 6, 7, 8
5, 6, 7, 8
5, 6, 7, 8
5, 6, 7, 8

Denied
Denied
Denied
Denied
Denied
Denied
Duke Energy Corporation 8 Denied
First Energy Generation Corporation - 
Little Blue Run Dam
8 Denied
Georgia Power Company
- Bowen Power Station
- Kraft Power Station
- McIntosh Power Station
- Harlee Branch Power Station
- Scherer Power Station
- Plant Hammond
- Plant McDonough
- Plant Mitchell
- Plant Yates
- Wansley Power Station

5, 6, 7, 8
5, 6, 7, 8
5, 6, 7, 8
5, 6, 7, 8
5, 6, 7, 8
5, 6, 7, 8
5, 6, 7, 8
5, 6, 7, 8
5, 6, 7, 8
5, 6, 7, 8

Denied
Denied
Denied
Denied
Denied
Denied
Denied
Denied
Denied
Denied
Gulf Power Company 5, 8 Denied
Mississippi Power Company 5, 6, 7, 8 Denied

If you have any questions regarding EPA's information collection effort or field assessments of coal combustion residual impoundments, or if you identify any errors/discrepancies please contact Jana Englander (englander.jana@epa.gov, 703.308.8711) or Craig Dufficy (dufficy.craig@epa.gov, 703.308.9037).

Database of Survey Responses

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