Page 1 | Updated June 4 , 2014 | These figures may be updated as new information becomes available. 

## Duke Energy Coal Plants and Ash Basins

According to the U.S. Energy Information Administration, about 37 percent of all electricity generated in the United States c omes from coal. All coal naturally contains inorganic matter from the rocks and minerals i n the coal seam where it was mined. Coal

- fired power plants burn coal to make steam, and the steam turns turbines to generate electricity. When that coal is burned, the inorganic matter in the coal becomes coal ash. Coal ash has been accumulating at sites throughout the United States for more than nine decades. Duke Energy owns and operates 28 coal plants in six states.

Different types of coal ash

Coal combustion results in two forms of ash:

 Fly ash

— a fine material similar to the consistency of talcum po wder. Fly ash accounts for about 78 percent of the coal ash generated annually in the
United States.

 Bottom ash

— a coarser material collected from the bottom of coal

- fired boilers.

In addition to fly ash and bottom ash, some power plants also produce syn thetic gypsum as a byproduct. This happens at coal

- fired plants that have emissions

control equipment called scrubbers installed to remove sulfur dioxide emissions

. Storing and managing coal ash

If the ash is not being reused or recycled, it can be stored dry in landfills or in water in ash basins. Duke Energy has already transitioned its larger active coal

fired units to store fly ash in dry landfills and has multiple measures in place to safely and effectively manage the ash tha t is stored in basins.Page 2 | Updated June 4 , 2014 | These figures may be updated as new information becomes available. 

## North Carolina Ash Basins

Plant Location Plant
status Current ash management Number of
active ash
basins 1 Number of

semi

- active
ash basins 1 Number of

inactive ash
basins 1 Total

number of
ash basins Size

(acreage of all basins) Ash inventory

in basins (tons) 2

Allen Belmont Operating Dry fly ash beneficially reused or managed in a lined landfill; basin receives
bottom ash. 1 0 1 2 301 11,580,000

Asheville Asheville Operating Ash managed in basin and directed to a lined fill project at airport; developi ng future strategy. 1 0 1 2 78 2,200,000

Belews Creek Belews Creek Operating Dry fly ash beneficially reused or managed in a lined landfill; basin receives
bottom ash. 1 0 0 1 342 12,610,000

Buck Salisbury Retired Priority for ash basin
closure. 0 4 0 4 134 6,100,000

Cape Fear Moncure Retired Priority for ash basin
closure. 0 1 4 5 173 4,460,000

Cliffside Mooresboro Operating Unit 6 dry fly and bottom ash managed in a lined landfill; unit 5 directs ash to
basins. 2 0 1 3 144 6,540,000

Dan River Eden Re tired Priority for ash basin
closure. 0 1 1 2 43 1,170,000

H.F. Lee Goldsboro Retired Priority for ash basin
closure. 0 1 4 5 314 4,920,000Page 3 | Updated June 4 , 2014 | These figures may be updated as new information becomes available.

Marshall Terrell Operating Dry fly ash beneficially reused or managed in a lined landfill; basin receives
bottom ash. 1 0 0 1 450 22,270,000

Mayo Roxboro Operating Dry fly ash beneficially reused or managed in a lined landfill; bottom ash managed in a lined landfill. 1 0 0 1 144 6,900,000

Riverbend Mount Holly Retired Priority for ash basin
closure. 0 2 0 2 69 2,7 30,000

Roxboro Semora Operating Dry fly ash beneficially reused or managed in a lined landfill; basin receives
bottom ash. 1 0 1 2 495 16,440,000

Sutton Wilmington Retired Priority for ash basin
closure. 0 1 1 2 135 2,600,000

Weatherspoon Lumberton Reti red Priority for ash basin
closure. 0 0 1 1 55 1,700,000

TOTAL 8 10 15 33 2,876 102,220,000

1. D efinitions

 Active ash basin

– an ash basin that currently receives coal ash and other permitted water inflows

 Semi

- active ash basin

– an ash basin that no longer receives coal ash and does receive other permitted water inflows

 Inactive ash basin

– an ash basin that no longer receives ash or other permitted water inflows Duke Energy’s ash basins in North Carolina are regulated by North Carolina Department of Environment and Natural Resources and U.S. Environmental Protection Agency under state and federal law. 2. This number represent s ash inventory stored in ash basins. It does not represent all ash stored at a site.Page 4 | Updated June 4 , 2014 | These figures may be updated as new information becomes available. 

## South Carolina Ash Basins

Plant Loca tion Plant
status Current ash management Number of
active ash
basins 1 Number of

semi

- active
ash basins 1 Number of

inactive ash
basins 1 Total

number of
ash basins Size

(acreage of all basins) Ash inventory

in basins (tons) 2

H.B. Robinson Hartsville Retired Priority for ash basin
closure. 0 0 1 1 55 660,000

W.S. Lee Williamston Operating 3 Basins receive fly ash and
bottom ash. 2 0 1 3 81 1,710,000

TOTAL 2 0 2 4 136 2,370,000

1. Definitions

 Active ash basin

– an ash basin that currently receives coal a sh and other permitted water inflows

 Semi

- active ash basin

– an ash basin that no longer receives coal ash and does receive other permitted water inflows

 Inactive ash basin

– an ash basin that no longer receives ash or other permitted water inflows Duke En ergy’s ash basins in South Carolina are regulated by South Carolina Department of Health and Environmental Control and U.S. Environmental Protection Agency under state and federal law. 2. This number represent s ash inventory stored in ash basins. It does not represent all ash stored at a site. 3 . Units 1 and 2 at W.S. Lee ha ve the potential to be retired by 2015; unit 3 is expected to be convert ed to natural gas by 2015.Page 5 | Updated June 4 , 2014 | These figures may be updated as new information becomes available. 

## Indiana Ash Basins

Plant Location Plant
status Current ash management Number of

ac tive ash
basins 1 Number of

semi

- active
ash basins 1 Number of

inactive ash
basins 1 Total

number of
ash basins Size

(acreage of all basins) Ash inventory

in basins (tons) 2

Cayuga Cayuga Operating Basins receive fly ash and bottom ash. Transitioning to dry f ly ash managment;
basins will continue to
receive bottom ash. 4 0 1 5 227 9,540,000

Edwardsport Edwardsport Operating Ash was removed from the basin prior to synthetic
liner installation. The lined
basin continues to be used as part of the new IGCC plant’ s permitted water treatment system. 0 0 2 2 9 0

Gallagher New Albany Operating Dry fly ash beneficially reused or managed in a lined landfill; basins
receive bottom ash. 2 0 2 4 129 5,830,000

Gibson Owensville Operating Dry fly ash beneficially
reused or managed in a lined landfill; basins
receive bottom ash. 4 0 3 7 648 16,990,000

Wabash River Terre Haute Operating 3 Basins receive fly ash and
bottom ash from all units. Most fly ash from unit 6 is handled dry and
ben e ficially reused. 4 0 1 5 200 3,230,00 0

TOTAL 14 0 9 23 1,212 35,590,000Page 6 | Updated June 4 , 2014 | These figures may be updated as new information becomes available. 1. Definitions

 Active ash basin

– an ash basin that currently receives coal ash and other permitted water inflows

 Semi

- active ash basin

– an ash basin that no longer receives coal ash and does receive other permitted water inflows

 Inactive ash basin

– an ash basin that no longer receives ash or other permitted water inflows The Indiana Department of Environmental Management regulates discharge to surface waterways at Duke Energy’s facilities in Indiana under the autho rity of the Clean Water Act, through an agreement with the U.S. Environmental Protection Agency. 2. This number represent s ash inventory stored in ash basins. It does not represent all ash stored at a site. 3. Units 2 through 5 at Wabash River ha ve the po tential to be retire d by 2015; unit 6 has the potential to be convert ed to natural gas or retire d by 2016.Page 7 | Updated June 4 , 2014 | These figures may be updated as new information becomes available. 

## Ohio Ash Basins

Plant Location Plant
status Current ash management Number
of active
ash
basins 1 Number of

semi

- active
ash basins 1 Number of

inacti ve ash
basins 1 Total

number of
ash basins Size

(acreage of all basins) Ash inventory

in basins (tons) 2

Beckjord New Richmond Units 1

– 4, retired; units 5, 6 operating 3 Basins receive fly ash and

bottom ash from units 5
and 6. 3 0 1 4 167 5,190,000

Miami Fort 4 North Bend Operating 4 Dry fly ash beneficially reused or managed in a lined landfill; basins receive
bottom ash. 2 0 0 2 53 770,000 4

Zimmer Moscow Operating Dry fly ash beneficially reused or managed in a lined landfill; bottom ash managed in a lin ed landfill. 0 0 0 0 0 0

TOTAL 5 0 1 6 220 5,960,000

1. Definitions

 Active ash basin

– an ash basin that currently receives coal ash and other permitted water inflows

 Semi

- active ash basin

– an ash basin that no longer receives coal ash and does rece ive other permitted water inflows

 Inactive ash basin

– an ash basin that no longer receives ash or other permitted water inflows Duke Energy’s ash basins in Ohio are regulated by Ohio Department of Natural Resources, Ohio Environmental Protection Agency an d U.S. Environmental Protection Agency under state and federal law. 2. This number represent s ash inventory stored in ash basins. It does not represent all ash stored at a site. 3 . Units 5 and 6 at Beckjord have the potential to be retire d by 2015. 4. Uni t 6 at Miami Fort serves Duke Energy Kentucky and has the potential to be retired by 2015 . The ash inventory number represents ash from all units at Miami Fort, including

u nit 6.Page 8 | Updated June 4 , 2014 | These figures may be updated as new information becomes available. 

## Kentucky Ash Basins

Plant Location Plant
status Current ash management Nu mber
of active
ash
basins 1 Number of

semi

- active
ash basins 1 Number of

inactive ash
basins 1 Total

number of
ash basins Size

(acreage of all basins) Ash inventory

in basins (tons) 2

East Bend Union Operating Dry fly ash managed in a lined landfill; basin re ceives
bottom ash. 1 0 0 1 53 1,520,000

Miami Fort 3 North Bend,

OH Operating 3 Basin receives fly ash and

bottom ash. N/A 3 N/A 3 N/A 3 N/A 3 N/A 3 N/A 3

TOTAL 1 0 0 1 53 1,520,000

1. Definitions

 Active ash basin

– an ash basin that currently receives coal ash and other permitted water inflows

 Semi

- active ash basin

– an ash basin that no longer receives coal ash and does receive other permitted water inflows

 Inactive ash basin

– an ash basin that no longer receives ash or other permitted water inflows Duke Energy’s ash basins in Kentucky are regulated by Kentucky Department for Environmental Protection and U.S. Environmental Prot ection Agency under state and federal law. Miami Fort is regulated by Ohio state agencies, as it is located in Ohio. 2. This number represent s ash inventory stored in ash basins. It does not represent all ash stored at a site. 3. Unit 6 at Miami Fort serves Duke Energy Kentucky and has the potential to be retired by 2015

. For basin statistics, see the Ohio Ash Basins information on p age 7

.Page 9 | Updated June 4 , 2014 | These figures may be updated as new information becomes available. 

## Florida Ash Basins

Plant Location Plant
status Current ash management Number
of active
ash
basins 1 Number of

semi

- active
ash basins 1 Number of

inactive ash
basins 1 Total

number of
ash basins Size

(acreage of all basins) Ash inventory

in basins (t ons) 2

Crystal River Crystal River Operating 3 Dry fly ash and bottom ash beneficially reused or managed in a landfill. 0 1 1 2 41 0

TOTAL 0 1 1 2 41 0

1. Definitions

 Active ash basin

– an ash basin that currently receives coal ash and other permitted water inflows

 Semi

- active ash basin

– an ash basin that no longer receives coal ash and does receive other permitted water inflows

 Inactive ash basin

– an ash basin that no longer receives ash or other permitted water inflows Duke Energy’s ash basins in F lorida are regulated by Florida Department of Environmental Protection and U.S. Environmental Protection Agency under state and federal law. 2. This number represent s ash inventory stored in ash basins. It does not represent all ash stored at a site. 3. U ni ts 1 and 2 at Crystal River have the potential to be retire d in 2018.