Item 2. PROPERTIES

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Item 2. PROPERTIES

Alliant Energy - As a holding company, Alliant Energy doesn’t directly own any significant properties other than the stock of its subsidiaries. The principal properties of those subsidiaries are as follows:

IPL and WPL

Electric - At December 31, 2016, IPL’s and WPL’s EGUs by primary fuel type were as follows:



IPL	Expected		Primary	Nameplate	Generating
	Retirement or	In-service	Dispatch	Capacity	Capacity
Name of EGU and Location	Fuel Switch (a)	Dates	Type (b)	in MW	in MW (c)
Emery Generating Station (Units 1-3); Mason City, IA	N/A	2004	IN	603	527
M.L. Kapp Generating Station (Unit 2); Clinton, IA	N/A	1967	IN	218	92
Sutherland Generating Station (Units 1,3); Marshalltown, IA	Retire by 6/30/17 (d)	1955-1961	IN	119	99
Fox Lake Generating Station (Units 1,3); Sherburn, MN	Retire by 12/31/17	1950-1962	IN	93	83
Burlington Combustion Turbines (Units 1-4); Burlington, IA	Retire by 12/31/17	1994-1996	PK	79	51
Dubuque Generating Station (Units 3-4); Dubuque, IA	Retire by 6/30/17 (d)	1952-1959	IN	66	59
Grinnell Combustion Turbines (Units 1-2); Grinnell, IA	Retire by 12/31/17	1990-1991	PK	48	36
Red Cedar Combustion Turbine (Unit 1); Cedar Rapids, IA	Retire by 12/31/18	1996	PK	23	11
Total Gas				1,249	958

Ottumwa Generating Station (Unit 1); Ottumwa, IA (e)	N/A	1981	BL	348	326
Lansing Generating Station (Unit 4); Lansing, IA	N/A	1977	BL	275	235
Prairie Creek Generating Station (Units 1,3,4); Cedar Rapids, IA	Units 1 and 3 - fuel switch or retire by 12/31/25; Unit 4 - fuel switch by 12/31/17 (d)	1958-1997	BL	213	147
Burlington Generating Station (Unit 1); Burlington, IA	Fuel switch by 12/31/21 (d)	1968	BL	212	203
George Neal Generating Station (Unit 4); Sioux City, IA (f)	N/A	1979	BL	179	160
George Neal Generating Station (Unit 3); Sioux City, IA (g)	N/A	1975	BL	164	131
Louisa Generating Station (Unit 1); Louisa, IA (h)	N/A	1983	BL	32	29
Total Coal				1,423	1,231

Marshalltown Combustion Turbines (Units 1-3); Marshalltown, IA	Fuel switch by 12/31/17	1978	PK	189	139
Lime Creek Combustion Turbines (Units 1-2); Mason City, IA	N/A	1991	PK	90	69
Centerville Combustion Turbines (Units 1-2); Centerville, IA	Retire by 12/31/17	1990	PK	54	47
Diesel Stations (5 Units); Iowa (i)	Retire by 12/31/17	1963-1966	PK	10	—
Total Oil				343	255

Whispering Willow - East (121 Units); Franklin Co., IA	N/A	2009	IN	200	33
Total Wind				200	33

Total capacity				3,215	2,477



WPL			Primary	Nameplate	Generating
		In-service	Dispatch	Capacity	Capacity
Name of EGU and Location	Expected Retirement (a)	Dates	Type (b)	in MW	in MW (c)
Riverside Energy Center (Units 1-3); Beloit, WI	N/A	2004	IN	675	539
Neenah Energy Facility (Units 1-2); Neenah, WI	N/A	2000	PK	371	283
South Fond du Lac Combustion Turbines (2 Units); Fond du Lac, WI (j)	N/A	1994	PK	191	146
Rock River Combustion Turbines (Units 3-6); Beloit, WI	Retire by 12/31/20	1967-1972	PK	169	122
Sheepskin Combustion Turbine (Unit 1); Edgerton, WI	Retire by 12/31/20	1971	PK	42	35
Total Gas				1,448	1,125

Columbia Energy Center (Units 1-2); Portage, WI (k)	N/A	1975-1978	BL	514	495
Edgewater Generating Station (Unit 5); Sheboygan, WI	N/A	1985	BL	414	399
Edgewater Generating Station (Unit 4); Sheboygan, WI (l)	Retire by 12/31/18 (d)	1969	BL	239	191
Total Coal				1,167	1,085

Bent Tree (122 Units); Freeborn Co., MN	N/A	2010-2011	IN	201	32
Cedar Ridge (41 Units); Fond du Lac Co., WI	N/A	2008	IN	68	9
Total Wind				269	41

Prairie du Sac Hydro Plant (8 Units); Prairie due Sac, WI	N/A	1914-1940	IN	32	12
Kilbourn Hydro Plant (4 Units); Wisconsin Dells, WI	N/A	1926-1939	IN	10	6
Total Hydro				42	18

Total capacity				2,926	2,269


(a)	Expected dates for the retirement and fuel switching of these EGUs are subject to change depending on operational, regulatory, market and other factors. The potential retirement of other EGUs within the generation fleet continues to be evaluated. IPL and WPL are working with MISO, state regulatory commissions and other regulatory agencies, as required, to determine the final timing of certain of these actions. Final MISO studies could indicate that the retirement of an individual EGU may result in reliability issues and that transmission network upgrades for system reliability are necessary to enable such retirement. Under the current MISO tariff, the specific timing for the retirement of these EGUs could depend on the timing of the required transmission network upgrades as well as various operational, market and other factors.

(a)

Expected dates for the retirement and fuel switching of these EGUs are subject to change depending on operational, regulatory, market and other factors. The potential retirement of other EGUs within the generation fleet continues to be evaluated. IPL and WPL are working with MISO, state regulatory commissions and other regulatory agencies, as required, to determine the final timing of certain of these actions. Final MISO studies could indicate that the retirement of an individual EGU may result in reliability issues and that transmission network upgrades for system reliability are necessary to enable such retirement. Under the current MISO tariff, the specific timing for the retirement of these EGUs could depend on the timing of the required transmission network upgrades as well as various operational, market and other factors.


(b)	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.


(c)	Based on the accredited generating capacity of the EGUs included in MISO’s resource adequacy process for the planning period from June 2016 through May 2017.


(d)	Actions and plans for retirement or fuel switch meet requirements specified in IPL’s and WPL’s respective Consent Decree, which are discussed in Note 16(e).


(e)	Represents IPL’s 48% ownership interest in this 726 MW (nameplate capacity) / 680 MW (generating capacity) EGU, which is operated by IPL.


(f)	Represents IPL’s 25.695% ownership interest in this 696 MW (nameplate capacity) / 622 MW (generating capacity) EGU, which is operated by MidAmerican Energy Company.


(g)	Represents IPL’s 28% ownership interest in this 584 MW (nameplate capacity) / 466 MW (generating capacity) EGU, which is operated by MidAmerican Energy Company.


(h)	Represents IPL’s 4% ownership interest in this 812 MW (nameplate capacity) / 725 MW (generating capacity) EGU, which is operated by MidAmerican Energy Company.


(i)	These EGUs did not receive any accredited generating capacity for the planning period from June 2016 through May 2017.


(j)	Represents Units 2 and 3, which WPL owns. WPL also operates, but does not own, South Fond du Lac Combustion Turbines Units 1 and 4.


(k)	Represents WPL’s 46.2% ownership interest in this 1,112 MW (nameplate capacity) / 1,072 MW (generating capacity) EGU, which is operated by WPL.


(l)	Represents WPL’s 68.2% ownership interest in this 351 MW (nameplate capacity) / 280 MW (generating capacity) EGU, which is operated by WPL.

At December 31, 2016, IPL owned approximately 17,485 miles of overhead electric distribution line and 2,977 miles of underground electric distribution cable, as well as 564 substation distribution transformers, substantially all of which are located in Iowa. At December 31, 2016, WPL owned approximately 16,222 miles of overhead electric distribution line and 5,481 miles of underground electric distribution cable, as well as 302 substation distribution transformers, substantially all of which are located in Wisconsin.

Gas - IPL’s and 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, 2016, IPL’s gas distribution facilities included approximately 5,116 miles of gas mains located in Iowa and WPL’s included approximately 4,430 miles of gas mains located in Wisconsin.

Other - IPL’s and WPL’s other property consists primarily of operating and storeroom facilities, vehicles, computer hardware and software, communication equipment and other miscellaneous tools and equipment. IPL’s other property also includes steam service assets. Refer to Note 10(b) for information regarding WPL’s lease of Sheboygan Falls from AEF’s Non-regulated Generation business.

AEF - AEF’s principal properties included in “Property, plant and equipment, net” on Alliant Energy’s balance sheet at December 31, 2016 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 farm in Franklin County, Iowa that was placed in service in 2012. Sheboygan Falls and Franklin County wind farm were accredited with 281 MW and 17 MW, respectively, of generating capacity for MISO’s resource adequacy process for the planning period from June 2016 through May 2017.

Transportation - Includes a short-line railway in Iowa with 114 miles of railroad track, 10 active locomotives and 12 rail-cars; and a barge terminal on the Mississippi River.

Corporate Services - Corporate Services’ property included in “Property, plant and equipment, net” on Alliant Energy’s balance sheet at December 31, 2016 consisted primarily of a customer billing and information system for IPL and WPL and other computer software, and the corporate headquarters building located in Madison, Wisconsin.

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