| NEWS              |              | Exhibit 99 |
|-------------------|-------------------|------------|
| For Release:      | April 30, 2010    |
| Investor Contact: | Tim Thorp         |
|              | 218-723-3953      |
|              | tthorp@allete.com |
|              |              |
|              |              |
|              |              |
|              |              |
|              |              |

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|                                                    |                                           |                         | Quarter EndedMarch 31, |
|---------------------------------------------------------|------------------------------------------------|------------------------------|------------------------|
|                                                    |                                           |                         | 2010                   | 2009 |
| Operating Revenue                                       |                                           |                         |
|                                                    | Operating Revenue                              | $233.6                       | $204.9                 |
|                                                    | Prior Year Rate Refunds                        | –                      | (5.3)                  |
|                                                    | Total Operating Revenue                        | 233.6                        | 199.6                  |
|                                                    |                                           |                         |
| Operating Expenses                                      |                                           |                         |
|                                                    | Fuel and Purchased Power                       | 79.8                         | 72.8                   |
|                                                    | Operating and Maintenance                      | 87.7                         | 80.5                   |
|                                                    | Depreciation                                   | 20.0                         | 15.2                   |
|                                                    |                                           | Total Operating Expenses     | 187.5                  | 168.5 |
| Operating Income                                        | 46.1                                           | 31.1                         |
| Other Income (Expense)                                  |                                           |                         |
|                                                    | Interest Expense                               | (8.9)                        | (8.7)                  |
|                                                    | Equity Earnings in ATC                         | 4.5                          | 4.2                    |
|                                                    | Other                                          | 1.0                          | 1.1                    |
|                                                    |                                           | Total Other Income (Expense) | (3.4)                  | (3.4) |
|                                                    |                                           |                         |
| Income Before Non-Controlling Interest and Income Taxes | 42.7                                           | 27.7                         |
| Income Tax Expense                                      | 19.9                                           | 10.8                         |
| Net Income                                              | $22.8                                          | $16.9                        |
|                                                    | Less: Non-Controlling Interest in Subsidiaries | (0.2)                        | –                |
| Net Income Attributable to ALLETE                       | $23.0                                          | $16.9                        |
|                                                    |                                           |                         |                   |   |
| Average Shares of Common Stock                          |                                           |                         |
|                                                    | Basic                                          | 33.8                         | 30.9                   |
|                                                    | Diluted                                        | 33.8                         | 31.0                   |
|                                                    |                                           |                         |                   |
| Basic and Diluted Earnings Per Share of Common Stock    | $0.68                                          | $0.55                        |
|                                                    |                                           |                         |
| Dividends Per Share of Common Stock                     | $0.44                                          | $0.44                        |

|                            | Mar. 31, | Dec. 31, |   |                                               | Mar. 31, | Dec. 31, |
|---------------------------------|----------|----------|--------|----------------------------------------------------|----------|----------|
|                            | 2010     | 2009     |   |                                               | 2010     | 2009     |
| Assets                          |     |     |   | Liabilities and Shareholders' Equity               |     |     |
| Cash and Short-Term Investments | $32.5    | $25.7    |   | Current Liabilities                                | 108.6    | $133.1   |
| Other Current Assets            | 190.1    | 199.8    |   | Long-Term Debt                                     | 710.1    | 695.8    |
| Property, Plant and Equipment   | 1,649.1  | 1,622.7  |   | Other Liabilities                                  | 373.6    | 372.1    |
| Investment in ATC               | 90.3     | 88.4     |   | Deferred Income Taxes & Investment Tax Credits | 266.5    | 253.1    |
| Investments                     | 132.6    | 130.5    |   | Shareholders' Equity                               | 957.2    | 939.0    |
| Other                           | 321.4    | 326.0    |   |                                               |     |     |
| Total Assets                    | $2,416.0 | $2,393.1 |   | Total Liabilities and Shareholders' Equity         | $2,416.0 | $2,393.1 |

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|                       |                              |   |   |      | Quarter Ended |
|----------------------------|-----------------------------------|--------|--------|-----------|---------------|
|                       |                              |   |   | March 31, |
| ALLETE, Inc.               |                              | 2010   | 2009   |
| Income (Loss)              |                              |   |   |
| Millions                   |                              |   |   |      |          |
|                       | Regulated Operations              | $24.9  | $17.7  |
|                       | Investments and Other             | (1.9)  | (0.8)  |
|                       | Net Income Attributable to ALLETE |   | $23.0  | $16.9     |
| Diluted Earnings Per Share | $0.68                             | $0.55  |

| Statistical Data |         |   |   |
|------------------|--------------|--------|--------|
| Corporate        |         |   |   |   |
|             | Common Stock |   |   |
|             |         | High   |   | $34.00 | $33.27 |
|             |         | Low    |   | $29.99 | $23.35 |
|             |         | Close  |   | $33.48 | $26.69 |
|             | Book Value   |   | $26.74 | $25.59 |

| Kilowatt-hours Sold |                            |                  |
|---------------------|---------------------------------|-----------------------|
| Millions            |                            |                  |   |   |   |
|                | Regulated Utility               |                  |   |
|                |                            | Retail and Municipals |   |   |
|                |                            |                  | Residential | 357 | 375 |
|                |                            |                  | Commercial | 372 | 379 |
|                |                            |                  | Municipals | 265 | 265 |
|                |                            |                  | Industrial | 1,429 | 1,323 |
|                |                            |                  |   | Total Retail and Municipal | 2,423 | 2,342 |
|                |                            | Other Power Suppliers | 803 | 916 |
|                |                            |                  |   | Total Regulated Utility | 3,226 | 3,258 |
|                | Non-regulated Energy Operations | 33                    | 57 |
|                |                            |                  |   | Total Kilowatt-hours Sold | 3,259 | 3,315 |

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