Exhibit 99.1





|Business and Financial Update

 Tony Earley, Executive Chairman Nick Khouri, Vice President and Treasurer Mark Rolling, Director of Investor Relations  June 28, 2011
|---------------------------------------------------------------------------------------------------------------------------------------------------------------------



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##### 






|Safe Harbor Statement

The information contained herein is as of the date of this presentation. Many factors may impact forward-looking statements including, but not
limited to, the following: economic conditions and population changes in our geographic area resulting in changes in demand, customer
conservation, increased thefts of electricity and gas and high levels of uncollectible accounts receivable; changes in the economic and financial
viability of suppliers and trading counterparties, and the continued ability of such parties to perform their obligations to the Company; access to
capital markets and the results of other financing efforts which can be affected by credit agency ratings; instability in capital markets which could
impact availability of short and long-term financing; the timing and extent of changes in interest rates; the level of borrowings; the potential for
losses on investments, including nuclear decommissioning and benefit plan assets and the related increases in future expense and
contributions; the potential for increased costs or delays in completion of significant construction projects; the effects of weather and other
natural phenomena on operations and sales to customers, and purchases from suppliers; environmental issues, laws, regulations, and the
increasing costs of remediation and compliance, including actual and potential new federal and state requirements; health, safety, financial,
environmental and regulatory risks associated with ownership and operation of nuclear facilities ; impact of electric and gas utility restructuring in
Michigan, including legislative amendments and Customer Choice programs; employee relations and the impact of collective bargaining
agreements; unplanned outages; changes in the cost and availability of coal and other raw materials, purchased power and natural gas; volatility
in the short-term natural gas storage markets impacting third-party storage revenues; cost reduction efforts and the maximization of plant and
distribution system performance; the effects of competition; the uncertainties of successful exploration of unconventional gas resources and
challenges in estimating gas and oil reserves with certainty; impact of regulation by the FERC, MPSC, NRC and other applicable governmental
proceedings and regulations, including any associated impact on rate structures; changes in and application of federal, state and local tax laws
and their interpretations, including the Internal Revenue Code, regulations, rulings, court proceedings and audits; the amount and timing of cost
recovery allowed as a result of regulatory proceedings, related appeals or new legislation; the cost of protecting assets against, or damage due
to, terrorism or cyber attacks; the availability, cost, coverage and terms of insurance and stability of insurance providers; changes in and
application of accounting standards and financial reporting regulations; changes in federal or state laws and their interpretation with respect to
regulation, energy policy and other business issues; and binding arbitration, litigation and related appeals. New factors emerge from time to time.
We cannot predict what factors may arise or how such factors may cause our results to differ materially from those contained in any forward-
looking statement. Any forward-looking statements refer only as of the date on which such statements are made. We undertake no obligation to
update any forward-looking statement to reflect events or circumstances after the date on which such statement is made or to reflect the
occurrence of unanticipated events. This presentation should also be read in conjunction with the "Forward-Looking Statements" section in each
of DTE Energy's and Detroit Edison's 2010 Forms 10-K and 2011 Form 10-Q (which sections are incorporated herein by reference), and in
conjunction with other SEC reports filed by DTE Energy and Detroit Edison.  Cautionary Note - The Securities and Exchange Commission permits oil and gas companies, in their filings with the SEC, to disclose only proved reserves that
a company has demonstrated by actual production or conclusive formation tests to be economically and legally producible under existing economic and
operating conditions. We use certain terms in this presentation such as "probable reserves" that the SEC's guidelines strictly prohibit us from including in filings
with the SEC. You are urged to consider closely the disclosure in DTE Energy's 2010 Form 10-K and 2011 Form 10-Q, File No. 1-11607, available from our
offices or from our website at www.dteenergy.com. You can also obtain these Forms from the SEC by calling 1-800-SEC-0330.
2
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|Overview Utility Growth Non - Utility Growth 2011 Guidance

3
|-------------------------------------------------------------



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##### 






|Gas Storage & Pipelines

Power & Industrial Projects

Unconventional Gas
Production

Detroit Edison

MichCon

DTE Energy is an Integrated Energy Company

Complementary Non-Utility
Businesses

Strong, Stable and
Growing Utilities

Electric generation and
distribution 2.1 million customers Fully regulated by Michigan
Public Service Commission
(MPSC)

Natural gas distribution 1.2 million customers Fully regulated by MPSC

Energy Trading

~80% of DTE Energy's 2010 Earnings

~20% of DTE Energy's 2010 Earnings

4
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##### 






|"Bridge"
(CHART)

5

$2.82

$3.30

Growth and Value Creation

 *  Reconciliation to GAAP reported earnings included in the appendix

$2.89

DTE Energy Operating Earnings Per Share*

$3.60

$3.55

CAGR = ~9%

Targeting 5% - 6%  Annual Growth

Moved utilities to allowed ROE
|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



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##### 






|Constructive Regulatory Environment

6

Oct. 2010

Apr. 2011

Apr. 2011

Jun. 2011

Aug. 2011

Oct. 2011

Rate Filing
$253 million*

Staff
Recommendation
$157 million

Self Implemented Rate Increase  $107 million base rate increase Continuation of electric Customer
Choice tracker

Briefs /
Reply Briefs

Proposal for
Decision

Final Order (1 year from filing)

Detroit Edison Rate Case Schedule

*Revenue requirement of $443 less proposed reductions to: delay recognition of Choice Incentive Mechanism base reset
($123); defer increased pension/OPEB expense ($47); reduce Nuclear Decommissioning surcharge ($20).
|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



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##### 






|(CHART)

Dividend Increase is Well Supported

7

  Recently increased dividend
rate 5% to $2.35 per share Dividend yield in-line with
peers Payout ratio in-line with 60%-
70% target Future increases supported by
targeted 5% - 6% EPS growth
Dividend Yield (as of May 2011)

4.5%
|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



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##### 






|Overview Utility Growth Non - Utility Growth 2011 Guidance

8
|-------------------------------------------------------------



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##### 






|9



Detroit Edison Investment Profile, 2011 - 2013

Base  Infrastructure $2.1 - $2.3 billion

Investments in scrubbers,
SCRs to meet Clean Air Act
requirements

Investments to ensure
reliability of generation
fleet and distribution
systems

Renewable Energy &  Energy Efficiency $500 - $600 million

New generation to meet
Michigan RPS Up to 50% owned by Detroit
Edison

Environmental Compliance  $800 - $900 million
|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



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##### 






|10

Monroe Power Plant

Current environmental capital focused on Monroe
Power Plant (3,100 MW, 45% of coal-fired production)  Near/Mid-Term Plans: Complete scrubbers and SCR at Monroe Power
Plant  Conventional and/or emerging technologies at
newer/larger units Likely retire older/smaller coal units  Mid/Longer-Term Investments: Additional wind generation Potential for combined cycle gas turbine generation


Emissions Reductions

$800 - $900 million 2011-2013 Investment
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##### 






|Renewable Energy

11
(CHART)

~$40

Projected Earnings (millions, after-tax)

$10 - $15

$30 - $35

10% of retail sales required by 2015  New capacity requirement of 300 MWs by 2013,
600 MWs by 2015; up to 50% owned by utility Renewable spend pre-approved by MPSC; not
subject to regulatory lag Legislated returns based on authorized ROE at
time of investment Investments funded through existing surcharge

$500 - $600 million 2011-2013 Investment
|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



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##### 






|Detroit Edison Wind Development

12

 212MW wind farm with partner Own 64 turbines (~102MW) Purchase output of 69 turbines
(~110MW) Construction began December 2010 Investment will be substantially
completed in 2011 Earnings contribution begins in 2011

Gratiot County Wind Park $250 million 2011 Investment*

* Includes acquisition costs ($238 million) and internal development costs

Thumb Wind Projects  $225 million 2011-2013
Investment

In advanced stage of development
on three projects Combined 110 MW 2012/2013 commercial
operation dates Plan to contract for turbines by
end of 2011, ahead of predicted
turbine supply market tightening
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##### 






|Strengthen and expand distribution system Main renewal Investment in new markets  Transmission pipeline integrity  Customer focused investments Meter relocation program Appliance repair  NGV stations Propane conversions
13



MichCon Investment Profile, 2011 - 2013

Distribution, Transmission & Additional Growth $500 - $600 million
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|Overview Utility Growth Non - Utility Growth 2011 Guidance

14
|--------------------------------------------------------------



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##### 






|Gas Storage & Pipeline: Earnings Potential

of $75 Million by 2015

15
(CHART)

$23

$34

$38

$49

$51

(millions)

Solid Operating Earnings* Growth

~$75

$53

 *  Reconciliation to GAAP reported earnings included in the appendix

Growth Driven by Bluestone Lateral and  Millennium Mainline Expansions

Millennium

Vector

Gas Storage
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##### 






|16

 Gas Storage & Pipeline Growth: Bluestone Pipeline & Gathering Project
Bluestone Project

Bluestone


 Signed Letter of Intent with
Southwestern Energy Gathering pipeline lateral In-field gathering system Estimated capital investment of
$150 - $200 million Assets begin going in-service Q2
2012 Several other active producers
nearby
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##### 






|Strong Well Performance in Area of
Bluestone Project

17




































































Erie

Warren

McKean

Potter

Tioga

Bradford

Susquehanna

Wayne

Crawford

Venango

Mercer

Law-

rence

Beaver

Washington

Greene

Butler

Allegheny

Fayette

Westmoreland

Indiana

Clarion

Forest

Elk

Jefferson

Armstrong

Clearfield

Cambria

Somerset

Cameron

Lycoming

Clinton

Sullivan

Wyoming

Lacka- wanna

Pike

Monroe

Luzerne

Carbon

North- hampton

Bucks

Schuylkill

Lehigh

Berks

Montgomery

Philadelphia

Delaware

Chester

Lancaster

Lebanon

Dauphin

York

Adams

Franklin

Fulton

Bedford

Cumberland

Perry

Columbia

North- Cumberland

Union

Snyder

Centre

Mifflin

Huntingdon

Blair

Juniata

Mon- tour

Tier 1: >5.7

Tier 2: 3.7 - 4.7

Tier 3: 3.0 - 3.3

Tier 4: 2.0 - 2.5

Average 30 day IP rate (MMcf/d)

Source:   Pennsylvania Department of Environmental Protection (DEP) reporting through June 30, 2010

Well Performance by County

Bluestone
Location

Well performance in
Susquehanna County among
strongest in Marcellus   Over 80% of the wells
exceed Tier 1 production   Recoverable reserves of 6 -
10 Bcf per well
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##### 






|18

Gas Storage & Pipeline Growth:

Additional Opportunities around Millennium

Bluestone and other projects will bring
additional supply to Millennium Received interest for first 2 expansions 2 new compressor stations Expands capacity by ~50% to 0.8 Bcf/d First expansion on-line late 2012;
second expansion on-line 2013 Can be economically expanded to 1.5
Bcf/d

Millennium Mainline Expansions

Millennium to Iroquois (M-I) Connector

Provide new source of supply for Iroquois 55 miles pipe  Capacity 0.5 - 1.0 Bcf/d  Target  in-service 2016+
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##### 






|Gas Storage Provides Stable Earnings
Supported by Long-Term Contracts

19
(CHART)

90 Bcf

Storage Expiration Profile

Fully contracted - 6 year average term 95% of revenues based on fixed-price,
multi-year term contracts No exposure to gas price Diversifies earnings outside of
Michigan Not linked to Michigan economy Customer mix - LDCs, interstate
pipelines, and producer/marketers

Tiered expiration dates with manageable renewal volumes
|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



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##### 






|(CHART)

*Reconciliation to GAAP reported earnings included in the appendix **Contribution earnings, excludes corporate allocations, interest and overheads of ($60)-($70) in aggregate in 2015

Power & Industrial Projects: Earnings Potential
of Over $100 Million by 2015

 Illustrative

2010A

2009A

2011E

Operating Earnings Contribution by Project Type

$85

2012E

2013E

2014E

20

Steel  Industry Fuels

2015E

$30 - $40

  Over  $100

Operating  Earnings*

(millions)

BN  Contract

Higher  Coke  Pricing

BN  Contract

Reduced
Emissions Fuel $40 - $50**

Renewable  Energy $50 - $60**

Industrial Energy  Services $75 - $85**
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|Power & Industrial Projects Growth:

Reduced Emissions Fuel

21

Sorbent Storage Tank

Product Conveyor

Feedstock Conveyor

Motor Control Center

Refined Coal
Facility

Five facilities placed in service in late 2009  Likely to construct 1-2 additional facilities this year One facility currently in operation at power-plant site Agreement reached to place a facility at a large power-plant site   Likely in operation this Fall  In advanced discussions with large utility about additional sites In substantive discussions with several other utilities
|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



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##### 






|22

Factors that Drive Earnings, NPV Level

Number of units ultimately sited Five constructed; considering building
more Size of host power plants (higher tonnage =
higher earnings/value) Can range from 1-10 million tons/year Pace/scale of adoption by host sites Quicker deal closure = greater value Operational issues at host sites   (CHART)
(CHART)

Low Case

High Case

Project Returns (millions)

Potential Earnings Contribution* (millions)

* Excludes corporate allocations and overheads

Low Case

High Case

 ~$75

Base Case

Base case

 Illustrative

Reduced Emissions Fuel: Potential for Significant

Value and Strong Earnings for 10 Years
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|Unconventional Gas: Barnett Shale Assets

Focused on a new "Marble Falls" oil play, directly
above Barnett formation Continuing to develop and prove up acreage DTE has 60,000 net acres in the area Wells producing hydrocarbons throughout Jack
County confirming play Vertical wells producing 1st month average of
100 bbls oil per day plus liquids rich gas Third party horizontal wells reporting 300 bbl
oil per day Divestitures to be timed with oil play maturation Potential small monetization in 2011 Targeting full monetization in 2012/2013
23

Barnett (Core Area) Gas Wells Barnett Gas & Oil Combo Wells DTE Acreage (Gas & Oil Combo)

Marble Falls  Area of Activity
|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



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##### 






|Overview Utility Growth Non - Utility Growth 2011 Guidance

24
|--------------------------------------------------------------



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##### 






|2011 Guidance

Operating Earnings* (millions)

2011 Drivers

 *  Reconciliation to GAAP reported earnings included in the appendix

2011
Guidance

2010
Actual

25

Productive outcome in Q4 2010 rate case filing;
ongoing cost reductions; earn authorized ROE (11%)

Earn authorized ROE (11%); lower midstream revenues;
cost reductions offset inflation; normal weather

Improvement over 2010; not expected to fully return to
historical levels in 2011

Higher oil production in 2011; non-strategic lease
impairments in 2010

Lower interest expense in 2011

Growth from new projects partially offsetting non-
repeating 2010 earnings, including Steel Industry Fuels

Stable earnings supported by long-term contracts
|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



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|26

2011 Capital Expenditures

& Cash Flow Guidance

Capital Expenditures

(millions)

Cash Flow Summary*

(billions)

* Includes securitization
|------------------------------------------------------------------------------------------------------------------------------------------------



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##### 






|(CHART)

27

*Debt excludes securitization, a portion of MichCon's short-term debt, and considers 50% of the trust preferreds as equity



Targeted Financial Metrics




A strong balance sheet continues to be a
key priority Leverage and cash flow metrics within
targeted ranges, without additional equity
in 2011 ~$2 billion of available liquidity at end of
1Q 2011
Leverage*

Funds from Operations / Debt*
(CHART)

51%

51%

Target 50% - 52%

28%

23%

Target 22% - 24%

53%

22%
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|Investment Thesis

 DTE Energy has a plan it believes will provide 5% - 6%
long-term operating EPS growth, an attractive
dividend yield and a strong balance sheet Utility growth plan driven by mandated investments Constructive regulatory structure and continued
cost savings enable utilities to earn their authorized
returns Plans in place to achieve operational excellence and
customer satisfaction that are distinctive in our
industry, with a focus on customer affordability Meaningful, low-risk growth opportunities in non-
utility businesses continue to provide diversity in
earnings and geography
 5%-6% Average Annual EPS Growth   Attractive Dividend
28
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|Contact Us

DTE Energy Investor Relations  www.dteenergy.com/investors  313-235-8030

29
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|Appendix
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##### 






|Gas Storage & Pipeline: Overview

Storage  Assets

Pipeline
Interests

31

Fully contracted (6 year avg. term) 90 Bcf of storage capacity in Michigan 26,200 H.P. of reciprocal compression
Nearly 100% contracted (> 10 year avg.
term) 222 miles of pipe; 15,000 H.P. of
compression

Fully contracted (6 year avg. term) 348 miles of pipe; 120,000 H.P. of
compression at five stations

Vector Pipeline - 40%

Millennium Pipeline - 26.25%

DTE Gas Storage

Michigan Gathering Assets

Comprised of MichCon Lateral and
MichCon Gathering Companies Two systems: One designed to handle
liquid rich gas and the other for dry
production gas
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##### 






|Unconventional Gas Valuation
       Reserves   Value**   Low Value   High Value
       (Bcfe)   ($ per mcfe)   ($ millions)   ($ millions)
   Proved   201*   $1.50 - $2.00   $300   $400
   Probable   354   $0.25 - $1.00   $100   $350
   Total   555       $400   $750

32

* * Value based on comparative shale transactions adjusted for gas/natural gas liquid/oil mix

* SEC proved reserves as of year end 2010
|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



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##### 






|(CHART)
(CHART)
(CHART)

Net Production (Bcfe)

Gross Producing Wells

200

Reserves (Bcfe)

Acreage Position (000's Acres)

Net
Undeveloped
Acres

Net
Developed
Acres

Barnett Shale Operating Metrics


16

1Q 2011

59

75

16

54

YE2010

70

1Q 2011

YE2010

194

5.8

YE2010

4.8
(CHART)

YE2010

YE2009

Probable (Unaudited)

Proven

354

201

555

255

234

489

 Continue to prudently manage and
develop Barnett assets  Invest $25 million Drill  ~20 wells  Produce 5.8 Bcfe net, increase oil
production Develop oil reserves

6 new wells on-line, 8 in progress Production of 1.1 Bcfe 73% increase in oil sales year-over-
year Capital expenditures $8 million Acquired 5k acres, net
2011 1Q Results

2011 Goals

YE2011 Est.

33
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|Detroit Edison Generation Portfolio

34
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##### 






|(CHART)

DTE Energy Trading Reconciliation of
Operating Earnings* to Economic Net Income

 ** Consists of the income statement effect of not recognizing changes in the fair market value of certain non-
derivative contracts including physical inventory and capacity contracts for transportation, transmission  and
storage.  These contracts are not MTM, instead are recognized for accounting purposes on an accrual basis.

($ millions)

1Q 2011 Economic Net Income

Accounting
Adjustments**

1Q 2011 Operating
Earnings*

$22

$24

Economic net income
equals economic gross
margin*** minus O&M
expenses and taxes.  DTE Energy management
uses economic net income
as one of the performance
measures for external
communications with
analysts and investors. Internally, DTE Energy
uses economic net income
as one of the measures to
review performance
against financial targets
and budget.

* Reconciliation to GAAP reported earnings included in the appendix

*** Economic gross margin is the change in net fair value of realized and unrealized purchase and sale contracts
including certain non-derivative contract costs

Energy Trading Operating
Earnings*

Realized Unrealized O&M / Other

1Q 2010

1Q 2011

$25

$16

-
28

(15)

(14)

($ millions, after-tax)

$38

$2
(CHART)

$38

$5

$43

1Q 2010 Operating
Earnings*

1Q 2010 Economic Net Income

Accounting
Adjustments**

35

$2
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|44 MW coal-to-waste-wood On-line Q4 2011 15 year contract 50% Ownership (post conversion)

36



Power & Industrial Growth Opportunities:

Waste-Wood Renewable Overview

25 MW waste-wood 10 year contract

60 MW coal/wood co-firing 15 year contract 50% ownership

40 MW coal-to-waste-wood On-line Q4 2010 10 year contract

45 MW coal-to-waste-wood On-line Q1 2013 25 year contract

Woodland

Mobile Energy Services

Stoneman (In Start-Up)

Stockton (In Conversion)

2004        2005        2006        2007       2008        2009        2010        2011        2012        2013        2014       2015

Stockton, California

Woodland, California

Mobile, Alabama

Cassville, Wisconsin

New Project Development

Multiple projects in early
stage development

Mt. Poso (In Conversion)

Bakersfield, California
|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



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##### 






|Orjiakor Isiogu Chairman Appointed: 9/9/07 Term Ends: 7/2/13 (Democrat)


Monica Martinez Commissioner Appointed: 7/3/05 Term Ends: 7/2/11 (Democrat)


Greg White Commissioner Appointed: 12/4/09 Term Ends: 7/2/15 (Independent)


Source: MPSC website - www.michigan.gov/mpsc - Jan. 2010

The Michigan Public Service Commission is composed of three members
appointed by the Governor with the advice and consent of the Senate.  Commissioners are appointed to serve staggered six-year terms.  No more than two Commissioners may represent the same political party.  One commissioner is designated as chairman by the Governor.

37

Michigan Public Service Commission (MPSC)
|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



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##### 






|38

Use of Operating Earnings Information - DTE Energy management believes that operating earnings provide a more meaningful representation of the company's
earnings from ongoing operations and uses operating earnings as the primary performance measurement for external communications with analysts and investors.
Internally, DTE Energy uses operating earnings to measure performance against budget and to report to the Board of Directors.

Reconciliation of 2010 Reported

to Operating Earnings

* Deferral of previously expensed cost to achieve as allowed for in June 3, 2010 MPSC order (case - U-15985)
|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



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##### 






|Reconciliation of 2009 Reported
to Operating Earnings

Use of Operating Earnings Information - DTE Energy management believes that operating earnings provide a more meaningful representation of the company's
earnings from ongoing operations and uses operating earnings as the primary performance measurement for external communications with analysts and investors.
Internally, DTE Energy uses operating earnings to measure performance against budget and to report to the Board of Directors.

39
|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



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##### 






|Reconciliation of 2008 Reported

to Operating Earnings

Use of Operating Earnings Information - DTE Energy management believes that operating earnings provide a more meaningful representation of the company's
earnings from ongoing operations and uses operating earnings as the primary performance measurement for external communications with analysts and investors.
Internally, DTE Energy uses operating earnings to measure performance against budget and to report to the Board of Directors.

40
|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



---



##### 






|Reconciliation of 2007 Reported

to Operating Earnings

Use of Operating Earnings Information - DTE Energy management believes that operating earnings provide a more meaningful representation of the company's
earnings from ongoing operations and uses operating earnings as the primary performance measurement for external communications with analysts and investors.
Internally, DTE Energy uses operating earnings to measure performance against budget and to report to the Board of Directors.

41
|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



---



##### 






|Reconciliation of Other Reported

to Operating Earnings

Use of Operating Earnings Information - DTE Energy management believes that operating earnings provide a more meaningful representation of the company's
earnings from ongoing operations and uses operating earnings as the primary performance measurement for external communications with analysts and investors.
Internally, DTE Energy uses operating earnings to measure performance against budget and to report to the Board of Directors.

In this presentation, DTE Energy provides guidance for future period operating earnings.  It is likely that
certain items that impact the company's future period reported results will be excluded from operating
results.  A reconciliation to the comparable future period reported earnings is not provided because it is not
possible to provide a reliable forecast of specific line items.  These items may fluctuate significantly from
period to period and may have a significant impact on reported earnings.
42

Gas Storage & Pipelines There were no adjustments to reported earnings for Gas Storage & Pipelines in 2006.
|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------