IPL
Electric - At December 31, 2014, IPL’s EGUs by primary fuel type were as follows:
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| | | | | | Primary | | Nameplate | | | Generating | |
| | | | In-service | | Dispatch | | Capacity | | | Capacity | |
| Name of EGU | | Location | | Dates | | Type (a) | | in MW | | | in MW (b) | |
| Ottumwa Generating Station (Unit 1) (c) | | Ottumwa, IA | | 1981 | | BL | | 348 | | | 316 | |
| Lansing Generating Station (Unit 4) | | Lansing, IA | | 1977 | | BL | | 275 | | | 247 | |
| M.L. Kapp Generating Station (Unit 2) (d) | | Clinton, IA | | 1967 | | BL | | 218 | | | 195 | |
| Prairie Creek Generating Station (Units 1,3,4) | | Cedar Rapids, IA | | 1958-1997 | | BL | | 213 | | | 142 | |
| Burlington Generating Station (Unit 1) | | Burlington, IA | | 1968 | | BL | | 212 | | | 194 | |
| George Neal Generating Station (Unit 4) (e) | | Sioux City, IA | | 1979 | | BL | | 179 | | | 159 | |
| George Neal Generating Station (Unit 3) (f) | | Sioux City, IA | | 1975 | | BL | | 164 | | | 134 | |
| Louisa Generating Station (Unit 1) (g) | | Louisa, IA | | 1983 | | BL | | 32 | | | 29 | |
| Total Coal | | | | | | | | 1,641 | | | 1,416 | |
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| Emery Generating Station (Units 1-3) | | Mason City, IA | | 2004 | | IN | | 603 | | | 499 | |
| Sutherland Generating Station (Units 1,3) (d) | | Marshalltown, IA | | 1955-1961 | | IN | | 119 | | | 84 | |
| Fox Lake Generating Station (Units 1,3) (d) | | Sherburn, MN | | 1950-1962 | | IN | | 93 | | | 83 | |
| Burlington Combustion Turbines (Units 1-4) (d) | | Burlington, IA | | 1994-1996 | | PK | | 79 | | | 60 | |
| Dubuque Generating Station (Units 3-4) (d) | | Dubuque, IA | | 1952-1959 | | IN | | 66 | | | 59 | |
| Grinnell Combustion Turbines (Units 1-2) (d) | | Grinnell, IA | | 1990-1991 | | PK | | 48 | | | 38 | |
| Red Cedar Combustion Turbine (Unit 1) | | Cedar Rapids, IA | | 1996 | | PK | | 23 | | | 6 | |
| Total Gas | | | | | | | | 1,031 | | | 829 | |
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| Marshalltown Combustion Turbines (Units 1-3) | | Marshalltown, IA | | 1978 | | PK | | 189 | | | 140 | |
| Lime Creek Combustion Turbines (Units 1-2) | | Mason City, IA | | 1991 | | PK | | 90 | | | 60 | |
| Centerville Combustion Turbines (Units 1-2) (d) | | Centerville, IA | | 1990 | | PK | | 54 | | | 45 | |
| Diesel Stations (7 Units) (d) | | Iowa and Minnesota | | 1963-1996 | | PK | | 14 | | | 8 | |
| Total Oil | | | | | | | | 347 | | | 253 | |
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| Whispering Willow - East (121 Units) (h) | | Franklin Co., IA | | 2009 | | IN | | 200 | | | — | |
| Total Wind | | | | | | | | 200 | | | — | |
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| Total capacity | | | | | | | | 3,219 | | | 2,498 | |
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| (a) | Base load EGUs (BL) are designed for nearly continuous operation at or near full capacity to provide the system base load. Intermediate EGUs (IN) follow system load changes with frequent starts and curtailments of output during low demand. Peak load EGUs (PK) are generally low efficiency, quick response units that run primarily when there is high demand. |
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| (b) | Based on the accredited generating capacity of the EGUs included in MISO’s resource adequacy process for the planning period from June 2014 through May 2015. |
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| (c) | Represents IPL’s 48% ownership interest in this 726 MW (nameplate capacity) / 659 MW (generating capacity) EGU, which is operated by IPL. |
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| (d) | Refer to “Strategic Overview” in MDA for discussion of EGUs that may be retired or changed from coal-fired to an alternative fuel source in the next few years. |
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| (e) | Represents IPL’s 25.695% ownership interest in this 696 MW (nameplate capacity) / 620 MW (generating capacity) EGU, which is operated by MidAmerican Energy Company. |
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| (f) | Represents IPL’s 28% ownership interest in this 584 MW (nameplate capacity) / 479 MW (generating capacity) EGU, which is operated by MidAmerican Energy Company. |
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| (g) | Represents IPL’s 4% ownership interest in this 812 MW (nameplate capacity) / 728 MW (generating capacity) EGU, which is operated by MidAmerican Energy Company. |
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| (h) | Generating capacity represents 0% of the capacity of this wind project based upon the MISO resource adequacy process, which is determined separately for each wind site, during the planning period from June 2014 through May 2015. The 0% allocation resulted from the lack of firm transmission at this wind site during the planning period from June 2014 through May 2015. |
At December 31, 2014, IPL owned approximately 19,642 miles of overhead electric distribution line and 2,961 miles of underground electric distribution cable, as well as 696 substation distribution transformers, substantially all of which are located in Iowa and Minnesota.
Gas - IPL’s gas properties consist primarily of mains and services, meters, regulating and gate stations and other related transmission and distribution equipment. At December 31, 2014, IPL’s gas distribution facilities included approximately 5,088 miles and 237 miles of gas mains located in Iowa and Minnesota, respectively.
Other - IPL’s other property consists primarily of steam service assets, operating and storeroom facilities, vehicles, computer hardware and software, communication equipment and other miscellaneous tools and equipment.
WPL
Electric - At December 31, 2014, WPL’s EGUs by primary fuel type were as follows:
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| | | | | | Primary | | Nameplate | | | Generating | |
| | | | In-service | | Dispatch | | Capacity | | | Capacity | |
| Name of EGU | | Location | | Dates | | Type (a) | | in MW | | | in MW (b) | |
| Columbia Energy Center (Units 1-2) (c) | | Portage, WI | | 1975-1978 | | BL | | 514 | | | 494 | |
| Edgewater Generating Station (Unit 5) | | Sheboygan, WI | | 1985 | | BL | | 414 | | | 406 | |
| Edgewater Generating Station (Unit 4) (d) (e) | | Sheboygan, WI | | 1969 | | BL | | 239 | | | 199 | |
| Nelson Dewey Generating Station (Units 1-2) (e) | | Cassville, WI | | 1959-1962 | | BL | | 227 | | | 202 | |
| Edgewater Generating Station (Unit 3) (e) | | Sheboygan, WI | | 1951 | | IN | | 69 | | | 69 | |
| Total Coal | | | | | | | | 1,463 | | | 1,370 | |
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| Riverside Energy Center (Units 1-3) | | Beloit, WI | | 2004 | | IN | | 675 | | | 545 | |
| Neenah Energy Facility (Units 1-2) | | Neenah, WI | | 2000 | | PK | | 371 | | | 281 | |
| South Fond du Lac Combustion Turbines (2 Units) (f) | | Fond du Lac, WI | | 1994 | | PK | | 191 | | | 143 | |
| Rock River Combustion Turbines (Units 3-6) (e) (g) | | Beloit, WI | | 1967-1972 | | PK | | 169 | | | 88 | |
| Sheepskin Combustion Turbine (Unit 1) (e) | | Edgerton, WI | | 1971 | | PK | | 42 | | | 35 | |
| Total Gas | | | | | | | | 1,448 | | | 1,092 | |
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| Bent Tree (122 Units) (h) | | Freeborn Co., MN | | 2010-2011 | | IN | | 201 | | | — | |
| Cedar Ridge (41 Units) (i) | | Fond du Lac Co., WI | | 2008 | | IN | | 68 | | | 8 | |
| Total Wind | | | | | | | | 269 | | | 8 | |
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| Prairie du Sac Hydro Plant (8 Units) | | Prairie du Sac, WI | | 1914-1940 | | IN | | 31 | | | 12 | |
| Kilbourn Hydro Plant (4 Units) | | Wisconsin Dells, WI | | 1926-1939 | | IN | | 10 | | | 6 | |
| Total Hydro | | | | | | | | 41 | | | 18 | |
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| Total capacity | | | | | | | | 3,221 | | | 2,488 | |
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| (a) | BL are designed for nearly continuous operation at or near full capacity to provide the system base load. IN follow system load changes with frequent starts and curtailments of output during low demand. PK are generally low efficiency, quick response units that run primarily when there is high demand. |
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| (b) | Based on the accredited generating capacity of the EGUs included in MISO’s resource adequacy process for the planning period from June 2014 through May 2015. |
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| (c) | Represents WPL’s 46.2% ownership interest in this 1,112 MW (nameplate capacity) / 1,070 MW (generating capacity) EGU, which is operated by WPL. |
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| (d) | Represents WPL’s 68.2% ownership interest in this 351 MW (nameplate capacity) / 292 MW (generating capacity) EGU, which is operated by WPL. |
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| (e) | Refer to “Strategic Overview” in MDA for discussion of EGUs that may be retired in the next few years. |
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| (f) | Represents Units 2 and 3, which WPL owns. WPL also operates South Fond du Lac Combustion Turbines Units 1 and 4. |
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| (g) | Rock River Combustion Turbine Unit 6 was not operating during the testing period for MISO’s resource adequacy process for the planning period from June 2014 through May 2015, resulting in no capacity being accredited to the EGU for that planning period. |
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| (h) | Generating capacity represents 0% of the capacity of this wind project based upon the MISO resource adequacy process, which is determined separately for each wind site, during the planning period from June 2014 through May 2015. The 0% allocation resulted from the lack of firm transmission at this wind site during the planning period from June 2014 through May 2015. |
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| (i) | Generating capacity represents 12% of the capacity of this wind project based upon the MISO resource adequacy process, which is determined separately for each wind site, during the planning period from June 2014 through May 2015. |
At December 31, 2014, WPL owned approximately 16,340 miles of overhead electric distribution line and 5,198 miles of underground electric distribution cable, as well as 303 substation distribution transformers, substantially all of which are located in Wisconsin.
Gas - WPL’s gas properties consist primarily of mains and services, meters, regulating and gate stations and other related transmission and distribution equipment. At December 31, 2014, WPL’s gas distribution facilities included approximately 4,195 miles of gas mains located in Wisconsin.
Other - Refer to Note 10(b) for information regarding WPL’s lease of Sheboygan Falls from Resources’ Non-regulated Generation business. WPL’s other property consists primarily of operating and storeroom facilities, vehicles, computer hardware and software, communication equipment and other miscellaneous tools and equipment.
Resources - Resources’ principal properties included in “Property, plant and equipment, net” on Alliant Energy’s balance sheet at December 31, 2014 were as follows:
Non-regulated Generation - Includes Sheboygan Falls, a 347 MW, simple-cycle, natural gas-fired facility near Sheboygan Falls, Wisconsin that was placed in service in 2005 and is leased to WPL, and the 99 MW (60 Units) Franklin County wind project in Franklin County, Iowa that was placed in service in 2012. Sheboygan Falls was accredited with 280 MW of generating capacity for MISO’s resource adequacy process for the planning period from June 2014 through May 2015.
Transportation - Includes a short-line railway in Iowa with 114 miles of railroad track, 12 active locomotives and 72 rail-cars; a barge terminal on the Mississippi River; and a coal terminal in Williams, Iowa.
Other non-regulated investments - Includes two corporate airplanes and real estate investments.
Corporate Services - Corporate Services’ property included in “Property, plant and equipment, net” on Alliant Energy’s balance sheet at December 31, 2014 consisted primarily of computer software and the corporate headquarters building located in Madison, Wisconsin. Corporate Services is also implementing a new customer billing and information system for IPL and WPL, which is currently expected to be deployed in 2015.
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