Executive Severance Agreement – Alliant Energy Corp.

EXECUTIVE AGREEMENT

THIS EXECUTIVE AGREEMENT (the “Agreement“) by and between Alliant
Energy Corporation and its subsidiaries including Alliant Energy Corporate
Services, Inc., as the employer (hereinafter, the “Company“), and
Dundeana K. Doyle (the “Executive“) is made as of August 12, 2011.

WHEREAS, the Company and the Executive have mutually agreed to the
Executive’s retirement and departure from employment with the Company as its
Senior Vice President : Energy Delivery and to the following satisfactory
transitional arrangements.

NOW, THEREFORE, in consideration of this mutual Agreement, the Company and
the Executive hereby agree as follows:

1. Departure. The Executive’s duties as Senior Vice President : Energy
Delivery and the Executive’s employment with the Company shall cease on August
31, 2011 (the “Departure Date“). Between the date hereof and the
Departure Date, the Company shall provide the Executive with the same
compensation and benefit plans as in effect immediately preceding the date
hereof (subject to the Company’s rights to amend or terminate any benefit plan).

2. Departure Payments and Benefits. Subject to Section 9 and
Section 10, the Company will provide the Executive with the following
payments and benefits in exchange for the Executive’s agreements hereunder:

(a) The Executive will receive a lump sum cash payment in the amount of
$291,400 allocated to 52 weeks of pay and representing wages from September 1,
2011 to August 31, 2012. This amount will be paid on the first pay period
following the expiration of the seven (7) day revocation period as described in
Exhibit A to the Agreement.

(b) The Executive will receive a lump sum cash payment representing unused
vacation through the Departure Date calculated at her current salary rate of
pay.

(c) In the event a short term incentive award under the Company’s 2011
Management Incentive Compensation Plan (“MICP”) is earned for 2011, the
Executive will receive a pro-rated amount of the MICP award for 2011 paid in
2012 pursuant to the terms of the MICP for retired executives (the pro-rated
amount being 8/12 of what Executive would have earned had she been employed by
the Company on December 31, 2011).

(d) The Executive shall be eligible for pro-rated payments as provided in the
applicable agreements between Executive and Company of earned long-term
incentive awards in the form of Performance Contingent Restricted Stock and
Performance Shares if the applicable performance goals are achieved during the
applicable performance periods under those plans and as confirmed by the
Compensation and Personal Committee of the Board of Directors (the “Committee”).

(e) Pursuant to a duly authorized amendment to the non-qualified Supplemental
Retirement Plan by the Committee providing for the Executive’s eligibility for
the early retirement benefit at age 53.5 years, the Executive will receive a
lump sum payment in the amount of $1,534,326 payable the first day of the
seventh month following the month in which the Departure Date occurs in
accordance with the terms of the plan.

(f) The Executive shall be entitled to the provision of medical and dental
insurance coverage and conversion of group life insurance as a Company early
retiree pursuant to the operation of those plans.

(g) The Executive will be entitled to a $10,000 benefit that can be used for
outplacement services or tuition reimbursement pursuant to the terms of these
programs.

3. Other Non-Qualified Benefit Plans. The Executive will receive the
current balances of the Non-Qualified Defined Benefit and Defined Contribution
Excess Plans in a lump sum payment, payable the first day of the seventh month
after the Departure Date. The Executive is eligible for a lump sum payment of
the current balance of the Alliant Energy Deferred Compensation Plan, payable on
the first day of the seventh month after the Departure Date in accordance with
the terms of the plan. The Executive will be paid a lump sum payment of the
current balance of the frozen IES Deferred Compensation Plan sixty (60) days
after the Departure Date in accordance with the terms of the plan.

4. Qualified Benefit Plans. The Executive will retain any vested
rights under all qualified retirement plans of the Company in which the
Executive is a participant and all rights associated with such benefits, as
determined by the terms of those plans. These plans include the Alliant Energy
401(k) Savings Plan, the Alliant Energy Cash Balance Plan and the Tier
Contribution Account.

5. Reverse Split Dollar Life Insurance. The Executive will be provided
with the options available under the two policies in the Executive’s name in
accordance with the terms of those policies.

6. Other Agreements or Benefits. Except as set forth above, this
Agreement does not limit or restrict in any way the Executive’s rights or
obligations under (a) the Company’s employee benefit plans, including any
retirement plan, retirement savings plan or group medical plan, or (b) any
Performance Contingent Restricted Stock or Performance Share awards previously
issued to the Executive, which awards shall remain in effect according to their
terms as of the date hereof as set forth in Section 2(d). Except as set
forth above, all the terms of the agreement between the Company and the
Executive are embodied in this Agreement and it fully supersedes any and all
prior agreements or understandings between the Executive and the Company.
Without limitation, the Key Executive Employment and Severance Agreement, dated
November 5, 2008, between the Company and the Executive will terminate on the
Departure Date. The Executive will cease to be eligible to participate under any
equity, bonus, incentive compensation, medical, dental, life insurance,
retirement, pension and other compensation or benefit plans of the Company
following the Departure Date except as set forth above. If the Executive is
currently enrolled in any accidental death & dismemberment or long-term
disability plans, such coverage shall cease on the Departure Date.

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7. Obligations of the Executive at Departure. The Executive shall, on
or before the Departure Date, provide the Company with resignations from all
positions as director or officer of the Company and its subsidiaries and as a
member of any committee or administrative body relating to the Company and its
subsidiaries. The Executive shall, in consultation with the Company’s General
Counsel, deliver to the Company the original and all copies of all documents,
records and property of any nature whatsoever which are in the Executive’s
possession or control and which are the property of the Company or which relate
to Confidential Information (as described below) or to the business activities,
facilities or customers of the Company, including any records (electronic or
otherwise), documents or property created by the Executive, as needed by the
Company, as determined in the Company’s sole discretion, and requested by the
General Counsel. Any documents, records and property of any nature in
Executive’s possession or control which are property of the Company or which
relate to Confidential Information (as described below) or to the business
activities, facilities or customers of the Company, including any records
(electronic or otherwise), documents or property created by the Executive, are
expressly subject to the requirements of Section 8.

8. Restrictive Covenants. In consideration of the payments and
benefits to be provided to the Executive under this Agreement, the Executive’s
position with the Company immediately prior to the Departure Date, the business
relationships the Executive has developed while employed by the Company, and the
Executive’s knowledge of the Company’s business affairs including the
Confidential Information (as defined below), the Executive agrees to the
following:

(a) Non-Competition. During the period from the date hereof through
the date that is one year following the Departure Date (the “Restricted
Period“), the Executive shall not (i) accept employment with or become a
consultant to, any business that is in competition with the Company’s Operations
(as defined below) (A) in any capacity where confidential information learned by
the Officer during employment with the Company would reasonably be considered
useful, or (B) in any capacity where customer relationships or goodwill
developed by the Executive or conferred by the Company on the Executive could
reasonably be considered useful or (ii) become a partner or a shareholder in any
business that is in competition with the Company’s Operations, although the
Executive may hold up to a five percent interest in any company that is traded
on the New York Stock Exchange or other national or over-the-counter securities
exchange without violating the provisions of this clause (ii). The restrictions
of this Section 8(a) apply within the geographic area served by any
business of the Company (including the Company’s affiliates) in which the
Executive was more than indirectly involved on behalf of the Company (for a
utility business, its regulated service territory as authorized by the
appropriate state agencies regulating utilities with jurisdiction over the
applicable business) (the “Company’s Operations“). The determination of
the Board of Directors of the Company as to whether a business is in competition
with the Company’s Operations and whether the competition is occurring in the
geographic area designated above shall be controlling for purposes of this
Agreement. In the event the Executive is offered employment with a business
during the Restricted

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Period and is uncertain as to whether the Board of Directors would consider
it to be in competition with the Company’s Operations or to fall within the
geographic area served by the Company or its affiliates, the Executive may
submit a written request to the General Counsel for an advance ruling, with the
General Counsel having 21 days to approve or disapprove of the Executive’s
prospective employment in writing, approval not to be unreasonably withheld.

(b) Non-Solicitation of Employees. During the Restricted Period, the
Executive shall not, directly or indirectly, for the Executive’s benefit or on
behalf of any person, corporation, partnership or entity whatsoever, hire,
attempt to hire, solicit for employment, or encourage the departure of any
employee of the Company or its subsidiaries, to leave employment with the
Company or its subsidiaries, or any individual who was employed by the Company
or its subsidiaries as of the Departure Date.

(c) Confidentiality. During the Restricted Period, the Executive shall
maintain the confidentiality of any and all information about the Company which
is not generally known or available outside the Company, including without
limitation, strategic plans, technical and operating know-how, business
strategy, trade secrets, customer information, business operations and other
proprietary information (“Confidential Information“), and the Executive
will not, directly or indirectly, disclose any Confidential Information to any
person or entity, or use any Confidential Information, whether for the benefit
of the Executive or the benefit of any new employer or any other person,
corporation, partnership or entity whatsoever, or in any other manner that is
detrimental to or inconsistent with any interest of the Company. The Executive
understands that the Company will be required to disclose the contents of this
Agreement. If the Executive is requested to provide Confidential Information
pursuant to a subpoena or other lawful process, the Executive shall notify the
Company’s General Counsel immediately and, to the extent the Executive is
legally entitled to do so, afford the Company the ability to seek a
confidentiality order.

(d) No Disparagement. Neither the Executive nor anyone acting at the
Executive’s direction at any time shall disparage the Company or its management
or Board of Directors, including without limitation by way of news media or
contacts to employees of the Company or its subsidiaries or the expression to
news media or employees of the Company or its subsidiaries of personal views,
opinions or judgments. Nor shall the Company or its officers or the Board of
Directors at any time so disparage the Executive. Nothing in this subsection or
in the preceding subsection shall be read to prevent the Company, its
management, or its Board of Directors, in their sole discretion, from providing
positive comments or reviews to prospective employers of the Executive, at their
request or the request of the Executive, regarding the Executive’s abilities,
skills or performance while employed with the Company.

(e) Acknowledgement of Reasonableness of Restrictions. The Executive
acknowledges and agrees that the scope and duration of the covenants set forth
in this Section 8 are reasonable and necessary to protect the legitimate
business interests of the Company. The Executive acknowledges that the Executive
has received and will receive substantial compensation from the Company in
consideration for the covenants set forth

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in this Section 8 and that the Executive’s general skills and
abilities are such that the Executive can be gainfully employed and that this
Agreement will not prevent the Executive from earning a living following the
Executive’s separation from service with the Company.

(f) Company Entitled to Injunctive Relief. The Executive agrees that
the Company will suffer irreparable damage in the event the provisions of this
Section 8 are breached and that the Executive’s acceptance of the
provisions of this Section 8 was a material factor in the Executive’s
decision to enter into this Agreement. The Executive further agrees that the
Company shall be entitled as a matter of right to injunctive relief to prevent a
breach by the Executive. Resort to such equitable relief, however, shall not
constitute a waiver of any other rights or remedies the Company may have. The
provisions of this Section 8 shall not apply to any truthful statement
required to be made by the Executive in any legal proceeding or government or
regulatory investigation, provided, however, that prior to making such statement
the Executive will give the Company reasonable notice and, to the extent the
Executive is legally entitled to do so, afford the Company the ability to seek a
confidentiality order. Nothing herein modifies or reduces the Executive’s
obligation to comply with applicable laws relating to trade secrets,
confidential information or unfair competition.

9. General Release. The Executive shall not be entitled to any payment
or benefit under Section 2 unless (a) the Executive executes and delivers
to the Company a General Release in the form attached hereto as Exhibit A
no later than twenty-one (21) days after the Departure Date and (b) the
revocation period specified in the General Release expires without the Executive
exercising the Executive’s right of revocation as set forth in the General
Release prior to the provision of the payment or benefit.

10. Noncompliance. The payments and other benefits provided for the
benefit of the Executive pursuant to Section 2 are conditioned upon the
Executive’s compliance with all of the terms and conditions of this Agreement,
particularly Section 8. Each of the aforementioned provisions are
material terms of this Agreement and in the event of any violation of any such
provision of this Agreement by the Executive, or anyone acting at the
Executive’s direction, the Executive agrees (a) the Company has the right to
cease future payments or provisions of benefits, (b) to repay to the Company all
payments paid or benefits provided for the Executive’s benefit under Section
2 and/or (c) the Company shall be entitled to recover from the Executive any
of the amounts paid or benefits pursuant to Section 2, without waiving
the right to pursue any other available legal or equitable remedies.

11. Expenses and Insurance. With respect to services provided by the
Executive prior to the Departure Date and pursuant to this Agreement, the
Company shall (a) reimburse the Executive for reasonable expenses incurred in
the performance of the Executive’s services in accordance with the Company’s
customary policies and, (b) maintain director and officer insurance coverage for
the Executive consistent with that provided to other officers of the Company,
and (c) provide the Executive with full indemnification as permitted by law.

12. Taxes. The Company shall be entitled to withhold from any payments
made to the Executive hereunder in accordance with the Company’s customary
policies all applicable

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payroll, withholding or other taxes that the Company determines are required
by applicable law to be so withheld. This Agreement shall be administered in
compliance with Section 409A of the Internal Revenue Code of 1986, as amended
(the “Code“). For purposes of applying the provisions of Section 409A of
the Code to this Agreement, each separately identified amount to which the
Executive is entitled under this Agreement shall be treated as a separate
payment and to the extent permissible under Section 409A of the Code, any series
of installment payments under this Agreement shall be treated as a right to a
series of separate payments. The parties agree to amend the Agreement as may be
necessary to avoid application of excise taxes or penalties under Section 409A
of the Code to payments made pursuant to this Agreement. However, the forgoing
shall not be construed as a guarantee by the Company of any particular tax
effect to the Executive under this Agreement. The Company shall not be liable to
the Executive for any payment made under this Agreement that is determined to
result in an additional tax, penalty or interest under Section 409A of the Code,
nor for reporting in good faith any payment made under this Agreement as an
amount includible in gross income under Section 409A of the Code. Nothing herein
shall require the Company to provide the Executive with any gross-up for any
tax, interest or penalty incurred by the Executive under Section 409A of the
Code.

13. Severability. In the event any one or more of the provisions of
this Agreement (or any part thereof) shall for any reason be held to be invalid,
illegal or unenforceable, the remaining provisions of this Agreement (or part
thereof) shall be unimpaired, and the invalid, illegal or unenforceable
provision (or part thereof) shall be replaced by a provision (or part thereof),
which, being valid, legal and enforceable, comes closest to the intention of the
parties underlying the invalid, illegal or unenforceable provisions. However, in
the event that any such provision of this Agreement (or part thereof) is
adjudged by a court of competent jurisdiction to be invalid, illegal or
unenforceable, but that the other provisions (or part thereof) are adjudged to
be valid, legal and enforceable if such invalid, illegal or unenforceable
provision (or part thereof) were deleted or modified, then this Agreement shall
apply with only such deletions or modifications, or both, as the case may be, as
are necessary to permit the remaining separate provisions (or part thereof) to
be valid, legal and enforceable.

14. Governing Law. This Agreement shall be governed by the substantive
laws of the State of Wisconsin without regard to its conflict of laws provisions
or the laws of any other jurisdiction in which the Executive resides or performs
any duties hereunder, or where any violation of the Agreement occurs.

15. Successors; Binding Agreement. The Company shall have the right to
assign its obligations under this Agreement to any entity that acquires all or
substantially all of the assets of the Company and continues the Company’s
business. The rights and obligations of the Company under this Agreement shall
inure to the benefit of and shall be binding upon the Company and its successors
and assigns. The Executive may not assign the Executive’s rights or delegate the
Executive’s obligations hereunder.

16. Amendment; Waiver. This Agreement may be amended or modified only
by a written instrument executed by the Company and the Executive. No provision
of this Agreement may be waived or discharged unless such waiver or discharge is
in writing and signed by the Chief Executive Officer or the President of the
Company following approval of the

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Compensation and Personnel Committee of the Board of Directors, if required.
Any failure by the Executive or the Company to enforce any of the provisions of
this Agreement shall not be construed to be a waiver of such provisions or any
right to enforce each and every provision in the future. A waiver of any breach
of this Agreement shall not be construed as a waiver of any other or subsequent
breach.

17. Committee Approval. This Agreement is conditioned on approval by
the Committee. The Company undertakes to use its best efforts to obtain
Committee approval of this Agreement in a timely manner.

18. Headings. The headings of Sections of this Agreement are for
reference purposes only and do not define or limit, and shall not be used to
interpret or construe, the contents of this Agreement.

19. Counterparts. This Agreement may be executed in one or more
counterparts (including by facsimile or other electronic means), each of which
shall be deemed to be an original but all of which together shall constitute one
and the same instrument.

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IN WITNESS WHEREOF, the parties hereto have executed this Agreement as of the
date first above written.

Dundeana K. Doyle				Alliant Energy Corporation Alliant Energy Corporate Services, Inc.
/s/ Dundeana K. Doyle				By		/s/ James H. Gallegos
Signature of the Executive						James H. Gallegos
						Vice President and General Counsel

[Signature Page to Executive Agreement]

EXHIBIT A

GENERAL RELEASE

In consideration of the substantial compensation provided by Alliant Energy
Corporation, its subsidiaries and Alliant Energy Corporate Services, Inc. as the
employer (the “Company“) under the Executive Agreement (the
“Agreement“), dated August 12, 2011, between the Company and Dundeana K.
Doyle (the “Executive“), for the benefit of the Executive, including the
payment and other benefits that are to be provided to the Executive in
connection with the termination of the Executive’s employment pursuant to the
Agreement, the Executive, on behalf of the Executive, the Executive’s spouse,
heirs, executors, administrators, agents, successors, assigns and
representatives of any kind (hereinafter collectively referred to as the
“Releasors“) confirm that Releasors have, as of the date set forth below
(the “Effective Date“), released the Company, and each of its
subsidiaries and affiliates, and its and their directors, officers, employees,
successors, assigns, executors, trustees, advisors, agents and representatives,
and all their respective predecessors and successors (hereinafter collectively
referred to as the “Releasees“), from any and all actions, causes of
action, charges, debts, liabilities, accounts, demands, damages and claims of
any kind or nature whatsoever, whether known or unknown, arising prior to or
through the Effective Date, including, but not limited to, any of the forgoing
arising out of or in connection with the employment of the Executive by the
Company or the termination of such employment. The Executive also releases and
waives any claim or right to further compensation, benefits, damages, penalties,
attorney’s fees, costs or expenses of any kind from the Company or any of the
other Releasees, except for the specific compensation and benefits described in
Section 2, Section 3, Section 4, Section 5 and Section 6 of the Agreement. The
Executive further agrees not to file, pursue, or participate in any lawsuits of
any kind in either state or federal court against any of the Releasees with
respect to any claim released herein, including any claim arising out of or in
connection with the employment of the Executive by the Company or the
termination of such employment (other than pursuing a claim for unemployment
compensation benefits to which the Executive may be entitled). This release
specifically includes, but is not limited to, a release of any and all claims
pursuant to any federal, state or local laws, statutes, ordinances, rules,
regulations or orders of any kind, whether statutory or decisional, including,
but not limited to, wage payment and fair employment laws; the Fair Labor
Standards Act; the Age Discrimination in Employment Act of 1967; Title VII of
the Civil Rights of Act of 1964; the Rehabilitation Act of 1973; the
Reconstruction Era Civil Rights Acts, 42 U.S.C. § 1981 : 1988; the Civil Rights
Act of 1991; the Americans with Disabilities Act; the Employee Retirement Income
Security Act of 1974; the Consolidated Omnibus Budget Reconciliation Act of
1985; the National Labor Relations Act; the Family and Medical Leave Act; any
state family and/or medical leave acts; the Vietnam Era Veterans’ Readjustment
Assistance Act of 1974; and any state Human Rights Law, as each of them has been
or may be amended. This release also specifically includes, but is not limited
to, a release of any and all claims (i) of discrimination or harassment based on
age, national origin, race, religion, sexual orientation, or physical or mental
disability or medical conditions unrelated to the ability to perform or (ii) for
tort, breach of contract, wrongful termination, retaliation, defamation,
misrepresentation, violation of public policy or invasion of privacy.

Notwithstanding the foregoing, this General Release does not waive rights, if
any, the Executive or the Executive’s successors and assigns may have under or
pursuant to, or

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release any member of Releasees from obligations, if any, it may have to them
or to their successors and assigns on claims arising out of, related to or
asserted under or pursuant to the terms of the Agreement that are to be
performed by the Company after the Effective Date, any indemnity agreement or
obligation contained in or adopted or acquired pursuant to any provision of the
charter or by-laws of the Company or its subsidiaries or affiliates or in any
applicable insurance policy carried by the Company or its affiliates.

The Executive hereby acknowledges that the Executive had at least twenty-one
(21) days to review this General Release and the Executive has been advised to
review it with an attorney of the Executive’s choice. The Executive further
understands that the twenty-one (21) day review period ends when the Executive
signs this General Release. The Executive also has seven (7) days after the
Executive’s signing of this General Release to revoke by so notifying the
Company in writing, in which case this General Release shall not become
effective or enforceable. Failure to provide this General Release without
revocation does not delay occurrence of the Executive’s Departure Date (as
defined in the Agreement).

The Executive acknowledges that the payments and benefits described in
Section 2 of the Agreement are greater than those to which the Executive is
entitled by any contract, employment policy or otherwise and that the
Executive’s eligibility for the payments and other benefits described in Section
2 of the Agreement is contingent on the Executive’s signing and returning this
General Release to the Company in a timely manner and on its taking effect
thereafter in accordance with its terms.

The Executive acknowledges that the Executive (i) has carefully read and
understands this General Release, (ii) had the opportunity to consult with legal
counsel prior to executing this General Release, (iii) understands the legal
effect and binding nature of this General Release and (iv) is acting voluntarily
(and not as a result of any threats or coercion) with the intention that the
Executive be legally bound thereby.

IN WITNESS WHEREOF, the parties hereto have executed this Agreement this 12th
day of August, 2011.

Dundeana K. Doyle				Alliant Energy Corporation Alliant Energy Corporate Services, Inc.
/s/ Dundeana K. Doyle				By		/s/ James H. Gallegos
Signature of the Executive						James H. Gallegos
						Vice President and General Counsel

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