Second Nature is available to electric customers who choose to contribute to the purchase of renewable energy resources. Customers in Wisconsin who enroll in Second Nature do so under the Wisconsin Power and Light Company Second Nature tariff filed with the Public Service Commission of Wisconsin, available online at www.alliantenergy.com .

Customer contact information
1-800-ALLIANT (1-800-255-4268) (residential customers)
1-866-ALLIANT (1-866-255-4268) (non-residential customers)
Web site: www.alliantenergy.com/secondnature
E-mail address: secondnature@allliantenergy.com
Billing address: Alliant Energy, 4902 Biltmore Lane, Madison, WI 53707

Enrollment and cancellation
Customers electing to participate in Second Nature will be enrolled in the program effective date of the customer's next meter reading. Customers may cancel from the program at any time by notifying the company. The cancellation will be effective at the date of the customer's next meter reading.

Rate structure

Residential customers
Customers purchasing the service under Second Nature are subject to all charges applicable to the General Service rate. An additional energy charge per kilowatt-hour, dependent on the selected level of participation, shall be applied. Fuel adjustment clause surcharges will be prorated based on the customer's level of participation. The additional energy charge and prorated fuel adjustment clause surcharges are noted below:

25% level participation: $0.005 charge per kilowatt-hour plus 75% of fuel adjustment clause surcharges.
50% level participation: $0.010 charge per kilowatt-hour plus 50% of fuel adjustment clause surcharges.
100% level participation: $0.020 charge per kilowatt-hour.
Non-residential customers
Non-residential customers taking service under Second Nature may nominate any dollar amount equal to or greater than $5.00, payable per billing period. For Second Nature accounting purposes, the kilowatt-hour participation in this program will be determined by dividing the dollar nomination by the Second Nature premium of $0.02 per kilowatt-hour.

Non-residential customers are subject to all charges applicable to their respective service rate, with the exception that fuel adjustment clause surcharges will not be applicable to energy purchased under this tariff.

Iowa

Second Nature is available to electric customers who choose to support generation technologies that rely on renewable energy resources. Customers in Iowa who enroll in Second Nature do so under the Interstate Power and Light Company Second Nature tariff filed with the Iowa Utilities Board, available online at www.alliantenergy.com .

Enrollment and cancellation
Customers electing to participate in Second Nature will be enrolled in the program effective with the customer's next feasible meter reading date after the company is notified by the customer. Customers may cancel from the program at any time by notifying the company. The cancellation will be effective with the next feasible meter reading date after the company is notified by the customer.

Rate structure

Residential customers

The following charges will be billed to Second Nature customers based on customer selected support level. These charges are in addition to the electric residential service energy charge, or the charges under the optional time of day provision.

Standard Rate Code	Time of Day Rate Code	Second Nature Support Level	Second Nature Additional Charge (per kilowatt-hour)
450 (IES-N), 550 (IES-S), 040 (IPC)	457-8, 557-8, 047-8	100%	$0.02
460 (IES-N), 560 (IES-S), 050 (IPC)	467-8, 567-8, 057-8	50%	$0.01
470 (IES-N), 570 (IES-S), 060 (IPC)	477-8, 577-8, 067-8	25%	$0.005

Billing also includes an adjustment per kilowatt-hour to compensate for changes in the cost of fuel. The Second Nature energy cost adjustment will be fixed for each calendar year and will be recalculated on an annual basis with the most recent actual 12-month period of energy costs and applied in the first calendar month after approval by the Iowa Utilities Board.

Non-residential customers
Non-residential customers taking service under Second Nature may nominate any monthly dollar amount of participation in the program. This contribution toward the costs of renewable energy will be added to the customer's normal monthly bill.

Non-residential customers will pay the actual energy cost adjustment on their monthly utility bills, but they will receive a billing adjustment for participating kilowatt-hour purchases if the actual energy adjustment on their monthly bills is greater than the fixed Second Nature energy adjustment, which will be recalculated on an annual basis with the most recent actual 12-month period of energy costs.

Minnesota

Second Nature is available to electric customers who choose to support generation technologies that rely on renewable energy resources. Customers in Minnesota who enroll in Second Nature do so under the Interstate Power and Light Company Second Nature tariff filed with the Minnesota Public Utilities Commission, available online at www.alliantenergy.com .

Customer contact information
1-800-ALLIANT (1-800-255-4268) (residential customers)
1-866-ALLIANT (1-866-255-4268) (non-residential customers)
Web site: www.alliantenergy.com/secondnature
E-mail address: secondnature@allliantenergy.com
Billing address: Alliant Energy, 200 First Street SE, Cedar Rapids, IA 52401-1409

Enrollment and cancellation
Customers electing to participate in Second Nature will be enrolled in the program effective with the customer's next feasible meter reading date after the company is notified by the customer. Customers may cancel from the program at any time by notifying the company. The cancellation will be effective with the next feasible meter reading date after the company is notified by the customer.

Rate structure

Residential customers

The following charges will be billed to Second Nature customers based on the customer's selected support level. These charges are in addition to the electric residential service energy charge.

25% level participation: $0.005 charge per kilowatt-hour

50% level participation: $0.010 charge per kilowatt-hour

100% level participation: $0.020 charge per kilowatt-hour

Billing also includes an adjustment per kilowatt-hour to compensate for changes in the cost of fuel. The energy cost adjustment is a fixed charge of -$0.00280 per kilowatt-hour. This fixed charge is the equivalent of $0.01412 per kilowatt-hour after deducting the $0.01692 per kilowatt-hour of energy charges in base rates.

Non-residential customers

Non-residential customers taking service under Second Nature may nominate any monthly dollar amount of participation in the program. This contribution toward the costs of renewable energy will be added to the customer's normal monthly bill.