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Disclosure in accordance with Rule 425
Filed by Great Plains Energy Incorporated
Pursuant to Rule 425 under the Securities Act of 1933
And deemed filed pursuant to Rule 14a-12
Under the Securities Exchange Act of 1934
Subject Company: Aquila, Inc.
Commission File No.: 1-03562
 
This filing relates to the proposed transactions pursuant to the terms of the Agreement and
Plan of Merger, dated as of February 6, 2007, by and among Aquila, Inc., Great Plains
Energy Incorporated, Gregory Acquisition Corp. and Black Hills Corporation.
 
 
 

 
  Great Plains Energy/Aquila                 Black Hills/Aquila 
Two Strategic Transactions Provide
- Reliable Service to Customers
- Enhanced Shareholder Value    
Mike Chesser, Chairman & CEO, Great Plains Energy
 
Rick Green, Chairman, President & CEO, Aquila, Inc.
 
David Emery, Chairman, President & CEO, Black Hills Corporation
February 7, 2007
 
 

 
Information Concerning Forward-Looking Statements
Statements made in this document that are not based on historical facts are forward-looking, may
involve risks and uncertainties, and are intended to be as of the date when made.  In connection with
the safe harbor provisions of the Private Securities Litigation Reform Act of 1995, Great Plains Energy,
Aquila, Inc. and Black Hills Corporation are providing a number of important factors, risks and
uncertainties that could cause actual results to differ materially for the provided forward-looking
information.  These include: obtaining shareholder approvals required for the transactions; the timing of,
and the conditions imposed by, regulatory approvals required for the transactions; satisfying the
conditions to the closing of the transactions; Great Plains Energy and Black Hills Corporation
successfully integrating the acquired Aquila, Inc. businesses into their respective operations, avoiding
problems which may result in either company not operating as effectively and efficiently as expected;
the timing and amount of cost-cutting synergies; unexpected costs or unexpected liabilities, or the
effects of purchase accounting may be different from the companies’ expectations; the actual resulting
credit ratings of the companies or their respective subsidiaries; the effects on the businesses of the
companies resulting from uncertainty surrounding the transactions; the effect of future regulatory or
legislative actions on the companies; and other economic, business, and/or competitive factors.
Additional factors that may affect the future results of Great Plains Energy, Aquila, Inc. and Black Hills
Corporation are set forth in their most recent quarterly report on Form 10-Q or annual report on Form
10-K with the Securities and Exchange Commission ("SEC"), which are available at
www.greatplainsenergy.com, www.aquila.com and www.blackhillscorp.com, respectively. Great Plains
Energy, Black Hills Corporation and Aquila, Inc. undertake no obligation to publicly update or revise any
forward-looking statements, whether as a result of new information, future events or otherwise. 
 
 
Safe Harbor Language
 
 

 
Additional Information and Where to Find It
In connection with the acquisition of Aquila, Inc. by Great Plains Energy, Great Plains Energy intends to file with
the SEC a registration statement on Form S-4, containing a joint proxy statement/prospectus and other relevant
materials. The final joint proxy statement/prospectus will be mailed to the stockholders of Great Plains Energy
and Aquila, Inc. INVESTORS AND SECURITY HOLDERS OF GREAT PLAINS ENERGY AND AQUILA, INC.
ARE URGED TO READ THE JOINT PROXY STATEMENT/PROSPECTUS AND THE OTHER RELEVANT
MATERIALS WHEN THEY BECOME AVAILABLE BECAUSE THEY WILL CONTAIN IMPORTANT
INFORMATION ABOUT GREAT PLAINS ENERGY AND AQUILA THE ACQUISITION. The registration statement
and joint proxy statement/prospectus and other relevant materials (when they become available), and any other
documents filed by Great Plains Energy or Aquila, Inc. with the SEC, may be obtained free of charge at the SEC’s
web site at www.sec.gov. In addition, investors and security holders may obtain free copies of the documents
(when they are available) filed with the SEC by Great Plains Energy by directing a request to: Great Plains
Energy, 1201 Walnut, Kansas City, MO 64106, Attn: Investor Relations. Investors and security holders may obtain
free copies of the documents filed with the SEC by Aquila, Inc. by contacting Aquila, Inc., 20 West Ninth Street,
Kansas City, MO 64105, Attn: Investor Relations. 
Participants in Proxy Solicitation
Great Plains Energy, Aquila, Inc. and their respective executive officers and directors may be deemed to be
participants in the solicitation of proxies relating to the proposed transaction. Information about the executive
officers and directors of Great Plains Energy and their ownership of Great Plains Energy common stock is set
forth in Great Plains Energy’s Annual Report on Form 10-K for the year ended December 31, 2005, which was
filed with the SEC on March 8, 2006, and the proxy statement for Great Plains Energy’s 2006 Annual Meeting of
Stockholders, which was filed with the SEC on March 20, 2006. Information regarding Aquila’s directors and
executive officers and their ownership of Aquila, Inc. common stock is set forth in Aquila’s Annual Report on Form
10-K for the year ended December 31, 2005, which was filed with the SEC on March 7, 2006 and the proxy
statement for Aquila’s 2006 Annual Meeting of Stockholders, which was filed with the SEC on March 24, 2006.
  Investors and security holders may obtain more detailed information regarding the direct and indirect interests of
Great Plains Energy, Aquila, Inc. and their respective executive officers and directors in the proposed transaction
by reading the joint proxy statement/prospectus regarding the proposed transaction when it becomes available. 
Additional Information
 
 

 
Transaction Summary
 
 

 
Focused regional acquisition and attractive strategic
growth opportunity delivers significant value to Great
Plains Energy and Aquila stakeholders
Solid rate base growth plan consistent with KCP&L’s balanced
Comprehensive Energy Plan
Adjacent utility territories provide ease of integration and
significant synergy opportunity
Expected to be modestly dilutive in 2008 and accretive
beginning in 2009
Co-owners of Iatan 1 and Iatan 2
Attractive growth profile at Aquila’s MO utilities consistent with
Great Plains Energy’s Strategic Intent
Strong regulatory, community & political relationships in MO
Opportunity to fill Aquila’s generation needs
Improves credit profile with more regulated business
Lower anticipated rate increases for Aquila customers
Acquiring only Aquila’s properties that are strategic to GXP
Acquisition of Aquila
advances Great
Plains Energy’s
Strategic Intent
Great Plains Energy to acquire Aquila for cash and stock
Great Plains Energy’s
Strategic Rationale
 
 

 
Black Hills
Corporation
Assets & Liabilities
$940M Cash
Aquila
Colorado Gas and
Electric
Iowa Gas
Kansas Gas
Nebraska Gas
Black Hills Corporation acquires
selected Aquila assets and
liabilities for cash
 
Aquila retains Missouri Public
Service and St. Joseph L&P
utilities, as well as assets in
Aquila’s merchant segment
Great Plains
Energy
Shareholders
Former Aquila
Shareholders
Aquila
~73%
Ownership
~27%
Ownership
  3.  Resulting Structure
KCP&L
Great Plains
Energy
  2.  The Merger
Great Plains
Aquila
Aquila
Shareholders
Merger
Great Plains Energy
acquires Aquila for cash
and stock
Acquisition
Corp.
KCP&L
Transaction Structure
  1.  The Asset Sale
 
 

 
Benefits to Aquila
Shareholders and Customers
Rick Green, Chairman, President & CEO
 
Aquila, Inc.
 
 
 
 

 
Domestic Utility Divisions(1)
Aquila
MPS / SJLP
Missouri Public Service (“MPS”) and
St. Joseph Light & Power (“SJLP”)
~304,000 electric customers
1,733 MW owned generation (53%
coal, 24% gas, 23% oil)
 
Colorado Electric
~92,000 electric customers
102 MW owned generation (42%
coal, 28% gas, 29% oil)
Electric Utilities
Colorado Gas
~64,000 gas customers
 
Nebraska Gas
~193,000 gas customers
 
Iowa Gas
~146,000 gas customers
 
Kansas Gas
~106,000 gas customers
Gas Utilities
Crossroads Peaker
340 MW gas–fired peaking plant in MS
Gas / Merchant Book
14 gas contracts
~300 MMBtu/day throughput
Hedged
Aquila Merchant Services
Aquila Service Territory(1)
 
(1)Pro forma for sale of Kansas Electric.
Aquila Gas
Aquila Electric
(1) Pro forma for the sale of Kansas Electric.
 
Aquila Overview
 
 

 
Aquila shareholders participate in upside potential through receipt of
Great Plains Energy stock
Enhanced rate base investment improves long-term growth
prospects
Transaction anticipated to result in investment grade credit rating
for Aquila debt
Ability to lower Aquila supply costs by leveraging KCP&L’s
generation portfolio
Significant synergies anticipated to result from transaction
Aquila shareholders benefit from Great Plains Energy’s stable and
attractive dividend
Aquila customers expected to benefit from:
Improved reliability and customer service
Lower projected rate increases
Benefits for Aquila
Shareholders & Customers
 
 

 
Benefits to Black Hills Shareholders
David Emery, Chairman, President & CEO
 
Black Hills Corporation
 
 
 
 

 
The opportunity of this transaction:
Significant scale and scope expansion – 93,000 electric and 523,000 gas customers
Opportunity to benefit from economies of scale, new resources, workforce innovation,
adaptability and business practices
We have the strategy, skills, experience & track record to make this deal
work:
Strong utility operations with commitment to superior customer service, reliability,
efficiency and cost control
Constructive regulatory relationships
Committed to environmental safety
Strong commitment to the communities we serve
The transaction is good for customers, investors and employees:
Customers benefit from improved economies of scale, operational efficiencies
and integrated business functions
Investors benefit from expanded operations, enhanced cash flow and earnings,
improved growth potential, lower risk profile and investment-grade credit rating
Employees will have increased opportunity for personal and professional growth
Lower overall business risk:
Expanded utility operations provide more stable cash flows
Stable service territories in KS, NE and IA, with high growth in CO
Diversifies regulatory and geographic exposure
Black Hills - Merits of Acquisition
 
 

 
Rapid
City
Profile of the Combined Company
(Based on recent public information)
Black Hills Assets
 
Utility operations
 
Power generation
 
Gas production
 
Oil production
 
Coal mine
 
Energy marketing
 
Acquired Assets
 
Utilities in CO, KS,
NE and IA
Black Hills – Assets of Combination
 
 

 
DESCRIPTION OF UTILITIES
Seven adjoining states in
Midwest and Rockies with
similar demographics and
business environments
Cheyenne
Light
WY
 
CO
 
NE
 
KS
 
IA
 
Rapid City
 
Black Hills Power
 
SD
 
MT
 
Black Hills – Utilities of Combination
 
 

 
A sound transaction – strategically, operationally and financially
Attractive, geographically diverse assets with stable or growing customer bases
Balanced financing strategy
Accretive to EPS after one year of transition costs
Expansion of retail utility footprint and addition of rate-base assets provides
stable, predictable cash flows and earnings
Commitment to relationship-based regulatory processes
Upside potential with vertical integration of acquired electric properties
Black Hills – Recap
 
 

 
Great Plains Energy Transaction Details
Mike Chesser, Chairman & CEO
 
Great Plains Energy
 
 
 

 
Electric Service Territories
Aquila
Great Plains Energy
 
 
Adjacent Service Territories Provide
Greater Scope and Scale
Bridge Strategy Group, LLC
 
Kansas
Missouri
Nebraska
St. Joseph
Lee’s Summit
Lenexa
Source: SNL Financial LC
 
Bridge Strategy Group LLC
 
Post-Transaction Great Plains Energy
Service Territory
 
 

 
 
KCP&L
KCP&L & Aquila
% change
Customers*
498,000
796,000
60%
Revenues* ($million)
1,131
1,666
47%
Rate base* ($billion)
2.3
3.4
48%
Generation capacity* (MW)
4,053
5,778
43%
Generation* (MMWh)
19.6
25.3
29%
Generation Capacity
Coal
Nuclear
Gas/Oil
 
55%
14%
31%
 
55%
9%
36%
 
 ---
(30)%
15%
Sales to retail consumers*
(MMWh)
14.9
22.5
51%
Source: 2005 10K  and FERC Form 1 for KCPL, MPS, and SJLP
Key Operating Statistics
 
 

 
Combined Regulatory Plan
 2006 Aquila Rate Case Concludes May 2007 
 2007 KCP&L Rate Cases
Missouri case filed on February 1, 2007
Kansas case to be Filed March 1, 2007
 2007 Merger Case
Merger approval 
 
After transaction close, rate increases to Aquila’s customers are
anticipated, overall, to be significantly lower vs. Aquila’s
stand-alone plan.
 
 

 
Financial Highlights
Approximately $500M in total synergies over 5 yrs.; $315M net of costs to
achieve
Transaction expected to be modestly dilutive in 2008 and accretive
beginning in 2009
Enhanced earnings growth prospects
Increased ownership of low-cost coal generation: Iatan 1 and Iatan 2
Capital investments consistent with KCP&L’s CEP (generation,
environmental, system improvement, and customer efficiency/affordability
programs)
Great Plains Energy’s long-term equity ratio target remains approximately 55%
 
Funding mix for capital projects associated with the Aquila transaction
expected to be similar to KCP&L’s CEP projects
$265m of Black Hills’ transaction proceeds anticipated for debt retirement
Strengthened balance sheet supports needed capital improvements at Aquila
Efficient use of Aquila’s tax benefits
Minimal tax on sale of assets to Black Hills
Remaining operating and capital loss tax benefits to be utilized in the
next 5 years
 
 

 
Shared
Services
Operations
Supply Chain
Interest
Estimated Synergies Average $100mm per Year
 
2008-2012 Estimated Synergies: $500mm
 
$92
$101
$102
$102
$103
Total (annual)
$143
$119
$50
$188
5-yr total
$500
Great Plains Energy
Transaction Synergies
 
 

 
Planned capital projects for Aquila are consistent with the elements of
 KCP&L’s existing CEP - designed to ensure environmentally sound
generation and low-cost, reliable service for customers
New generation investment at Iatan 2 and environmental investment at
Iatan 1 are already underway
2007 –2011 estimated rate base CAGR of about 15.8%
Estimated Aquila Capital Expenditures
($ in millions)
 
Post-Transaction Period
 
Total
 
2007E
 
2008E
 
2009E
 
2010E
 
2011E
 
 '07-'11
 
Base Capex
 
$115
 
$167
 
$122
 
$131
 
$106
 
$640
 
New Generation
 
81
 
112
 
68
 
31
 
-
 
 
 
 
 
291
 
Environmental
 
80
 
24
 
0
 
0
 
-
 
 
 
 
 
104
 
Infrastructure Investment
 
8
 
17
 
66
 
95
 
60
 
245
 
Demand Response/Energy Efficiency
 
-
 
 
 
 
 
5
 
5
 
15
 
15
 
40
 
   Capex Consistent With CEP
 
$680
 
Total Capex
 
$284
 
$324
 
$260
 
$271
 
$181
 
$1,320
 
Aquila Estimated Ratebase
 
$1,068
 
$1,224
 
$1,339
 
$1,841
 
$1,918
 
 
 

 
Projected Transaction Timeline
Feb. 2007
Announce
Transaction
Q1 2007
Q2 2007
Q3 2007
Q4 07
Regulatory
Filings
Develop Integration Implementation Plan
Work To Secure Regulatory Approvals
(FERC, HSR, MO, KS, IA, NE, CO)
Regulatory Approval
Close
Transaction
File Joint Proxy Statement &
Shareholder Votes
Q1 08
 
 

 
Summary
Acquisition of Aquila advances Great
Plains Energy’s Strategic Intent – acquiring only Aquila properties that
are strategic
Adjacent utility territories provides
strong  synergy opportunities
Expect to benefit from Great Plains
Energy’s strong regulatory
relationships in MO
Rate base growth plan consistent with
KCP&L balanced approach
Lower anticipated rates for Aquila
customers
Accelerates benefits for Aquila
shareholders
 
 

 
 Great Plains/Aquila                     Black Hills/Aquila
 
February 7, 2007