----

----

**UNITED      STATES**

**SECURITIES      AND EXCHANGE COMMISSION**

**FORM      10-Q**

| x | QUARTERLY                REPORT PURSUANT TO SECTION 13 OR 15 (d) OF THE SECURITIES EXCHANGE                ACT OF                1934 |
|---|---------------------------------------------------------------------------------------------------------------------------------------|

| o | TRANSITION                REPORT PURSUANT TO SECTION 13 OR 15 (d) OF THE SECURITIES EXCHANGE                ACT OF                1934 |
|---|----------------------------------------------------------------------------------------------------------------------------------------|

|   | For                the transition period from _____ to                _____ |
|--------|-----------------------------------------------------------------------------|

**RIDGEWOOD      ELECTRIC POWER TRUST IV**

| Delaware                                                                                    |   | 22-3324608                                          |
|---------------------------------------------------------------------------------------------|--------|-----------------------------------------------------|
| (State                of Other Jurisdictionof                Incorporation or Organization) |   | (I.R.S.                Employer Identification No.) |

| 1314                King Street, Wilmington, Delaware   |   | 19801                     |
|---------------------------------------------------------|--------|---------------------------|
| (Address                of Principal Executive Offices) |   | (Zip                Code) |

|   | (302)                  888-7444                                         |   |
|--------|-------------------------------------------------------------------------|--------|
|   | (Issuer’s                  Telephone Number, Including Area Code) |   |

|                                                                                                             |
|------------------------------------------------------------------------------------------------------------------|
| (Former                name, former address and former fiscal year, if changed since last                report) |

----

----

----

**RIDGEWOOD      ELECTRIC POWER TRUST IV**

**FORM      10-Q**

**INDEX**

|                    |                                                                                            |   | Page   |   |
|-------------------------|-------------------------------------------------------------------------------------------------|--------|--------|--------|
| PART                I.  | FINANCIAL                INFORMATION                                                            |   |   |   |
|                    |                                                                                            |   |   |   |
| Item                1.  | Financial                Statements                                                             |   |   | 3      |   |
|                    |                                                                                            |   |   |   |   |
| Item                2.  | Management’s                Discussion and Analysis of Financial                Condition |   |   |   |   |
|                    |    and                Results of Operations                                      |   |   | 10     |   |
|                    |                                                                                            |   |   |   |   |
| Item                3.  | Quantitative                and Qualitative Disclosures About Market                Risk        |   |   | 12     |   |
|                    |                                                                                            |   |   |   |   |
| Item                4.  | Controls                and Procedures                                                          |   |   | 12     |   |
|                    |                                                                                            |   |   |   |   |
| PART                II. | OTHER                INFORMATION                                                                |   |   |   |   |
|                    |                                                                                            |   |   |   |   |
| Item                1.  | Legal                Proceedings                                                                |   |   | 13     |   |
|                    |                                                                                            |   |   |   |   |
| Item                1A. | Risk                Factors                                                                     |   |   | 13     |   |
|                    |                                                                                            |   |   |   |   |
| Item                2.  | Unregistered                Sales of Equity Securities and Use of                Proceeds       |   |   | 13     |   |
|                    |                                                                                            |   |   |   |   |
| Item                3.  | Defaults                Upon Senior Securities                                                  |   |   | 13     |   |
|                    |                                                                                            |   |   |   |   |
| Item                4.  | Submission                of Matters to a Vote of Security                Holders               |   |   | 13     |   |
|                    |                                                                                            |   |   |   |   |
| Item                5.  | Other                Information                                                                |   |   | 13     |   |
|                    |                                                                                            |   |   |   |   |
| Item                6.  | Exhibits                                                                                        |   |   | 13     |   |
|                    |                                                                                            |   |   |   |   |
| SIGNATURES              |                                                                                            |   |   | 14     |   |

----

**PART      I.   FINANCIAL INFORMATION**

**ITEM      1.   FINANCIAL      STATEMENTS**

**RIDGEWOOD      ELECTRIC POWER TRUST IV**

**CONDENSED        CONSOLIDATED BALANCE SHEETS**

*(in        thousands, except share data)*

|                                                                                                                                                                                                              |   | September                  30, |   |   | December                  31, |   |
|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|--------|--------------------------------|--------|--------|-------------------------------|--------|
|                                                                                                                                                                                                              |   | 2006                           |   |   | 2005                          |   |
| ASSETS                                                                                                                                                                                                            |   | (unaudited)                    |   |   |                          |   |
| Current                  assets:                                                                                                                                                                                  |   |                           |   |   |                          |   |
| Cash                                                                                                                                                                                                              |   | $                              | 968    |   |                          | $      | 639 |   |
| Accounts                  receivable                                                                                                                                                                              |   |                           | 1,962  |   |                          |   | 2,045 |   |
| Notes                  receivable, affiliates – current portion                                                                                                                                             |   |                           | -      |   |                          |   | 207 |   |
| Due                  from affiliates                                                                                                                                                                              |   |                           | 39     |   |                          |   | 95 |   |
| Prepaid                  expenses and other current assets                                                                                                                                                        |   |                           | 55     |   |                          |   | 102 |   |
|         Total                  current assets                                                                                                                             |   |                           | 3,024  |   |                          |   | 3,088 |   |
| Notes                  receivable, affiliates – noncurrent portion                                                                                                                                          |   |                           | 5,229  |   |                          |   | 4,926 |   |
| Investments                                                                                                                                                                                                       |   |                           | 4,254  |   |                          |   | 4,174 |   |
| Plant                  and equipment, net                                                                                                                                                                         |   |                           | 8,754  |   |                          |   | 9,351 |   |
| Intangibles,                  net                                                                                                                                                                                 |   |                           | 2,008  |   |                          |   | 2,460 |   |
| Other                  assets                                                                                                                                                                                     |   |                           | 405    |   |                          |   | 405 |   |
|                                                                                                                                                                                                              |   |                           |   |   |                          |   |   |   |
|                Total                  assets                                                                                           |   | $                              | 23,674 |   |                          | $      | 24,404 |   |
|                                                                                                                                                                                                              |   |                           |   |   |                          |   |   |   |
| LIABILITIES                  AND SHAREHOLDERS’ EQUITY                                                                                                                                                       |   |                           |   |   |                          |   |   |   |
| Current                  liabilities:                                                                                                                                                                             |   |                           |   |   |                          |   |   |   |
| Accounts                  payable                                                                                                                                                                                 |   | $                              | 356    |   |                          | $      | 582 |   |
| Accrued                  royalty expense                                                                                                                                                                          |   |                           | 388    |   |                          |   | 409 |   |
| Due                  to affiliates                                                                                                                                                                                |   |                           | 797    |   |                          |   | 943 |   |
| Total                  current liabilities                                                                                                                                                                        |   |                           | 1,541  |   |                          |   | 1,934 |   |
| Minority                  interest                                                                                                                                                                                |   |                           | 4,471  |   |                          |   | 4,632 |   |
| Total  liabilities                                                                                                                                                                                      |   |                           | 6,012  |   |                          |   | 6,566 |   |
|                                                                                                                                                                                                              |   |                           |   |   |                          |   |   |   |
| Commitments                  and contingencies                                                                                                                                                                    |   |                           |   |   |                          |   |   |   |
|                                                                                                                                                                                                              |   |                           |   |   |                          |   |   |   |
| Shareholders’                  equity:                                                                                                                                                                      |   |                           |   |   |                          |   |   |   |
|      Shareholders’                  equity (476.8875 Investor Shares          issued                  and outstanding)           |   |                           | 17,754 |   |                          |   | 17,928 |   |
|      Managing                  Shareholder’s accumulated deficit         (1                  management share issued and outstanding) |   |                           | (92    | )      |                          |   | (90 | ) |
|               Total                  shareholders’ equity                                                                             |   |                           | 17,662 |   |                          |   | 17,838 |   |
|                                                                                                                                                                                                              |   |                           |   |   |                          |   |   |   |
|               Total                  liabilities and shareholders’ equity                                                             |   | $                              | 23,674 |   |                          | $      | 24,404 |   |

*The      accompanying notes are an integral part of these financial      statements.*

----

**RIDGEWOOD        ELECTRIC POWER TRUST IV**

**CONDENSED        CONSOLIDATED STATEMENTS OF OPERATIONS**

*(unaudited,        in thousands, except per share data)*

|                                                                                                                                                        |   | Nine                  Months Ended September 30, |   |   | Three                  Months Ended September 30, |   |
|-------------------------------------------------------------------------------------------------------------------------------------------------------------|--------|--------------------------------------------------|--------|--------|---------------------------------------------------|--------|
|                                                                                                                                                        |   | 2006                                             |   |   | 2005                                              |   |   | 2006 |   |   | 2005 |   |
|                                                                                                                                                        |   |                                             |   |   |                                              |   |   |   |   |   |   |   |
| Power                  generation revenue                                                                                                                   |   | $                                                | 5,607  |   |                                              | $      | 5,703 |   |   | $ | 1,844 |   |   | $ | 1,914 |   |
| Renewable                  attribute revenue                                                                                                                |   |                                             | 2,882  |   |                                              |   | 2,942 |   |   |   | 935 |   |   |   | 939 |   |
| Sublease                  revenue                                                                                                                           |   |                                             | 432    |   |                                              |   | 428 |   |   |   | 144 |   |   |   | 143 |   |
|       Total                  revenues                                                                                         |   |                                             | 8,921  |   |                                              |   | 9,073 |   |   |   | 2,923 |   |   |   | 2,996 |   |
|                                                                                                                                                        |   |                                             |   |   |                                              |   |   |   |   |   |   |   |   |   |   |   |
| Cost                  of revenues                                                                                                                           |   |                                             | 6,656  |   |                                              |   | 6,704 |   |   |   | 2,155 |   |   |   | 2,162 |   |
|                                                                                                                                                        |   |                                             |   |   |                                              |   |   |   |   |   |   |   |   |   |   |   |
| Gross                  profit                                                                                                                               |   |                                             | 2,265  |   |                                              |   | 2,369 |   |   |   | 768 |   |   |   | 834 |   |
|                                                                                                                                                        |   |                                             |   |   |                                              |   |   |   |   |   |   |   |   |   |   |   |
| Operating                  expenses:                                                                                                                        |   |                                             |   |   |                                              |   |   |   |   |   |   |   |   |   |   |   |
|         General                  and administrative expenses                                                        |   |                                             | 142    |   |                                              |   | 229 |   |   |   | 30 |   |   |   | 68 |   |
|         Management                  fee to the Managing Shareholder                                                 |   |                                             | 401    |   |                                              |   | 335 |   |   |   | 133 |   |   |   | 112 |   |
|                    Total                  operating expenses |   |                                             | 543    |   |                                              |   | 564 |   |   |   | 163 |   |   |   | 180 |   |
|                                                                                                                                                        |   |                                             |   |   |                                              |   |   |   |   |   |   |   |   |   |   |   |
| Income                  from operations                                                                                                                     |   |                                             | 1,722  |   |                                              |   | 1,805 |   |   |   | 605 |   |   |   | 654 |   |
|                                                                                                                                                        |   |                                             |   |   |                                              |   |   |   |   |   |   |   |   |   |   |   |
| Other                  income (expense):                                                                                                                    |   |                                             |   |   |                                              |   |   |   |   |   |   |   |   |   |   |   |
|      Interest                  income                                                                                              |   |                                             | 326    |   |                                              |   | 238 |   |   |   | 108 |   |   |   | 101 |   |
|      Interest                  expense                                                                                             |   |                                             | (43    | )      |                                              |   | (41 | ) |   |   | (17 | ) |   |   | (16 | ) |
|      Equity                  in income (loss) of Maine Hydro                                                                       |   |                                             | 672    |   |                                              |   | 484 |   |   |   | (83 | ) |   |   | (222 | ) |
|      Equity                  in income of Indeck Maine                                                                             |   |                                             | 357    |   |                                              |   | 1,028 |   |   |   | 548 |   |   |   | 1,478 |   |
|                  Total                  other income, net              |   |                                             | 1,312  |   |                                              |   | 1,709 |   |   |   | 556 |   |   |   | 1,341 |   |
|                                                                                                                                                        |   |                                             |   |   |                                              |   |   |   |   |   |   |   |   |   |   |   |
| Income                  before minority interest                                                                                                            |   |                                             | 3,034  |   |                                              |   | 3,514 |   |   |   | 1,161 |   |   |   | 1,995 |   |
|                                                                                                                                                        |   |                                             |   |   |                                              |   |   |   |   |   |   |   |   |   |   |   |
| Minority                  interest in the earnings of subsidiaries                                                                                          |   |                                             | (802   | )      |                                              |   | (839 | ) |   |   | (270 | ) |   |   | (280 | ) |
|                                                                                                                                                        |   |                                             |   |   |                                              |   |   |   |   |   |   |   |   |   |   |   |
|                  Net                  income                           |   | $                                                | 2,232  |   |                                              | $      | 2,675 |   |   | $ | 891 |   |   | $ | 1,715 |   |
|                                                                                                                                                        |   |                                             |   |   |                                              |   |   |   |   |   |   |   |   |   |   |   |
| Managing                  Shareholder – Net income                                                                                                    |   | $                                                | 22     |   |                                              | $      | 27 |   |   | $ | 9 |   |   | $ | 17 |   |
| Shareholders                  – Net income                                                                                                            |   |                                             | 2,210  |   |                                              |   | 2,648 |   |   |   | 882 |   |   |   | 1,698 |   |
| Net                  income per Investor Share                                                                                                              |   |                                             | 4,634  |   |                                              |   | 5,553 |   |   |   | 1,850 |   |   |   | 3,560 |   |
| Distributions                  per Investor Share                                                                                                           |   |                                             | 5,000  |   |                                              |   | 1,000 |   |   |   | 2,000 |   |   |   | - |   |

*The      accompanying notes are an integral part of these financial      statements.*

----

**RIDGEWOOD        ELECTRIC POWER TRUST IV**

**CONDENSED        CONSOLIDATED STATEMENTS OF CASH FLOWS**

*(unaudited,        in thousands)*

|                                                                                                                                                                       |   | Nine                  Months Ended September 30, |   |
|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------|--------|--------------------------------------------------|--------|
|                                                                                                                                                                       |   | 2006                                             |   |   | 2005 |   |
| Cash                  flows from operating activities:                                                                                                                     |   |                                             |   |   |   |   |
|                 Net                  cash provided by operating activities                 |   | $                                                | 3,495  |   |   | $ | 2,516 |   |
|                                                                                                                                                                       |   |                                             |   |   |   |   |   |   |
| Cash                  flows from investing activities:                                                                                                                     |   |                                             |   |   |   |   |   |   |
|       Repayment                  of notes receivable, affiliates                                                                             |   |                                             | 207    |   |   |   | - |   |
|       Loans                  to Indeck Maine                                                                                                 |   |                                             | -      |   |   |   | (1,000 | ) |
|       Loans                  to Ridgewood Power B fund/Providence Expansion                                                                  |   |                                             | -      |   |   |   | (207 | ) |
|                  Net                  cash provided by (used in) investing activities |   |                                             | 207    |   |   |   | (1,207 | ) |
|                                                                                                                                                                       |   |                                             |   |   |   |   |   |   |
| Cash                  flows from financing activities:                                                                                                                     |   |                                             |   |   |   |   |   |   |
|                                                                                                                                                                       |   |                                             |   |   |   |   |   |   |
|       Cash                  distribution to minority interest                                                                                |   |                                             | (964   | ) |   |   | (427 | ) |
|       Cash                  distribution to shareholders                                                                                     |   |                                             | (2,409 | ) |   |   | (482 | ) |
|                  Net                  cash used in financing activities               |   |                                             | (3,373 | ) |   |   | (909 | ) |
|                                                                                                                                                                       |   |                                             |   |   |   |   |   |   |
| Net                  increase in cash                                                                                                                                      |   |                                             | 329    |   |   |   | 400 |   |
| Cash,                  beginning of period                                                                                                                                 |   |                                             | 639    |   |   |   | 732 |   |
| Cash,                  end of period                                                                                                                                       |   | $                                                | 968    |   |   | $ | 1,132 |   |

*The      accompanying notes are an integral part of these financial      statements.*

----

**RIDGEWOOD        ELECTRIC POWER TRUST IV**

**NOTES        TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS**

**(unaudited,        dollar amounts in thousands)**

**1.   BASIS      OF PRESENTATION**

**2.   DESCRIPTION      OF BUSINESS**

----

**RIDGEWOOD        ELECTRIC POWER TRUST IV**

**NOTES        TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS**

**(unaudited,        dollar amounts in thousands)**

**3.        RECENT ACCOUNTING PRONOUNCEMENTS**

*FIN      48*

*Accounting for Uncertainty in Income Taxes*
*, Accounting for Income      Taxes*

*SFAS      157*

*Fair Value Measurements*

*SAB      108*

*Considering the Effects of Prior Year Misstatements When Quantifying      Misstatements in Current Year Financial Statements*

**4.             NOTES RECEIVABLE, AFFILIATES**

**5.             INVESTMENTS**

**Maine      Hydro**

----

**RIDGEWOOD          ELECTRIC POWER TRUST IV**

**NOTES          TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS**

**(unaudited,          dollar amounts in thousands)**

|                                                         |   | Nine                  Months Ended September 30, |   |   | Three                  Months Ended September 30, |   |
|--------------------------------------------------------------|--------|--------------------------------------------------|--------|--------|---------------------------------------------------|--------|
|                                                         |   | 2006                                             |   |   | 2005                                              |   |   | 2006 |   |   | 2005 |   |
|                                                         |   |                                             |   |   |                                              |   |   |   |   |   |   |   |
| Revenues                                                     |   | $                                                | 3,612  |   |                                              | $      | 3,314 |   |   | $ | 581 |   |   | $ | 367 |   |
|                                                         |   |                                             |   |   |                                              |   |   |   |   |   |   |   |   |   |   |   |
| Gross                  profit (loss)                         |   |                                             | 1,477  |   |                                              |   | 1,299 |   |   |   | (106 | ) |   |   | (349 | ) |
|                                                         |   |                                             |   |   |                                              |   |   |   |   |   |   |   |   |   |   |   |
| Income                  (loss ) from operations              |   |                                             | 1,393  |   |                                              |   | 1,165 |   |   |   | (152 | ) |   |   | (445 | ) |
|                                                         |   |                                             |   |   |                                              |   |   |   |   |   |   |   |   |   |   |   |
| Net                  income (loss)                           |   | $                                                | 1,344  |   |                                              | $      | 969 |   |   | $ | (167 | ) |   | $ | (443 | ) |
|                                                         |   |                                             |   |   |                                              |   |   |   |   |   |   |   |   |   |   |   |
| Trust                  share of income (loss) in Maine Hydro |   | $                                                | 672    |   |                                              | $      | 484 |   |   | $ | (83 | ) |   | $ | (222 | ) |

**Indeck      Maine**

|                                                   |   | Nine                  Months Ended September 30, |   |   | Three                  Months Ended September 30, |   |
|--------------------------------------------------------|--------|--------------------------------------------------|--------|--------|---------------------------------------------------|--------|
|                                                   |   | 2006                                             |   |   | 2005                                              |   |   | 2006 |   |   | 2005 |   |
|                                                   |   |                                             |   |   |                                              |   |   |   |   |   |   |   |
| Revenues                                               |   | $                                                | 24,566 |   |                                              | $      | 21,755 |   |   | $ | 8,881 |   |   | $ | 10,909 |   |
|                                                   |   |                                             |   |   |                                              |   |   |   |   |   |   |   |   |   |   |   |
| Gross                  profit                          |   |                                             | 2,531  |   |                                              |   | 3,655 |   |   |   | 1,767 |   |   |   | 3,673 |   |
|                                                   |   |                                             |   |   |                                              |   |   |   |   |   |   |   |   |   |   |   |
| Income                  from operations                |   |                                             | 2,250  |   |                                              |   | 3,259 |   |   |   | 1,609 |   |   |   | 3,455 |   |
|                                                   |   |                                             |   |   |                                              |   |   |   |   |   |   |   |   |   |   |   |
| Net                  income                            |   | $                                                | 1,154  |   |                                              | $      | 2,193 |   |   | $ | 1,256 |   |   | $ | 2,989 |   |
|                                                   |   |                                             |   |   |                                              |   |   |   |   |   |   |   |   |   |   |   |
| Trust                  share of income in Indeck Maine |   | $                                                | 357    |   |                                              | $      | 1,028 |   |   | $ | 548 |   |   | $ | 1,478 |   |

**6.           COMMITMENTS AND CONTINGENCIES**

----

**RIDGEWOOD        ELECTRIC POWER TRUST IV **

**NOTES          TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS **

**(unaudited,            dollar amounts in thousands)**

**7.   SUBSEQUENT      EVENTS**

----

**ITEM      2.   MANAGEMENT’S DISCUSSION AND ANALYSIS OF      FINANCIAL CONDITION AND RESULTS OF OPERATIONS**

**Forward-Looking      Statements**

**Critical      Accounting Policies and Estimates**

**Results      of Operations and Changes in Financial Condition**

*Nine      months ended September 30, 2006 compared to the nine months ended September      30,      2005*

----

*Three      months ended September 30, 2006 compared to the three months ended September      30,      2005*

**Liquidity      and Capital Resources**

*Nine      months ended September 30, 2006 compared to the nine months ended September      30,      2005*

----

**Future      Liquidity and Capital Resource Requirements**

**Off-Balance      Sheet Arrangements and Contractual Obligations and      Commitments**

**ITEM      3.   QUANTITATIVE AND QUALITATIVE DISCLOSURES      ABOUT MARKET RISK**

**ITEM      4.   CONTROLS AND      PROCEDURES**

|   | (i) | a                  lack of sufficient personnel with relevant experience to develop,                  administer and monitor disclosure controls and procedures to enable                  the                  Trust to comply efficiently, or on a timely basis, with its financial                  reporting obligations, |
|--------|-----|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

|   | (ii) | inadequate                  disclosure controls and procedures, including inadequate record                  retention                  and review policies that would enable the Trust to meet its financial                  reporting and disclosure obligations in an efficient and timely                  manner. |
|--------|------|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

|   | · | Increased                    the number of degreed accountants. Additional staff expansion                    is                    underway. |
|--------|--------|-----------------------------------------------------------------------------------------------------------------------------------------------|

|   | · | In                    May 2007, the Trust appointed a new Chief Financial Officer who                    is a                    Certified Public Accountant with approximately 29 years of professional                    accounting experience, including prior experiences as a financial                    officer                    of publicly traded companies. |
|--------|--------|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

----

**PART          II.   OTHER INFORMATION**

**ITEM          1.   LEGAL PROCEEDINGS**

**ITEM          1A.   RISK FACTORS**

**ITEM          2.   UNREGISTERED SALES OF EQUITY SECURITIES          AND USE OF PROCEEDS**

**ITEM          3.   DEFAULTS UPON SENIOR          SECURITIES**

**ITEM          4.   SUBMISSION OF MATTERS TO A VOTE OF          SECURITY HOLDERS**

**ITEM          5.   OTHER INFORMATION**

**ITEM            6.   EXHIBITS**

|   | 31.1   | *      | Certification                    of Randall D. Holmes, Chief Executive Officer of the Registrant,                    pursuant                    to Securities Exchange Act Rule 13a-14(a).                                                                                                                                                                                                                                   |
|--------|--------|--------|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
|   |   |   |                                                                                                                                                                                                                                                                                                                                                                                                                          |
|   | 31.2   | *      | Certification                    of Jeffrey H. Strasberg, Chief Financial Officer of the Registrant,                    pursuant to Securities Exchange Act Rule 13a-14(a).                                                                                                                                                                                                                                                   |
|   |   |   |                                                                                                                                                                                                                                                                                                                                                                                                                          |
|   | 32     | *      | Certifications                    pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section                    906 of                    The Sarbanes-Oxley Act of 2002, signed by Randall D. Holmes,                    Chief                    Executive Officer of the Registrant, and Jeffrey H. Strasberg,                    Chief                    Financial Officer of the                    Registrant. |

----

**SIGNATURES**

|                                             | **RIDGEWOOD ELECTRIC                    POWER TRUST IV** |
|--------------------------------------------------|---------------------------------------------------------------|
|                                             |                                                          |   |
|                                             |                                                          |   |
| Date:                     November 27, 2007 | By:                                                           | /s/                     Randall D. Holmes |
|                                             |                                                          | Randall                    D. Holmes |
|                                             |                                                          | Chief                    Executive Officer |
|                                             |                                                          | (Principal                    Executive Officer) |

|                                            |   |                                                                                      |
|-------------------------------------------------|--------|-------------------------------------------------------------------------------------------|
| Date:                     November 27 2007 | By:    | /s/                     Jeffrey H. Strasberg                                         |
|                                            |   | Jeffrey                    H. Strasberg                                                   |
|                                            |   | Executive                    Vice President andChief                    Financial Officer |
|                                            |   | (Principal                    Financial and Accounting Officer)                           |

----