1st Quarter Results (Russian Acc Standards)

30 April 2010

Information on events that caused a one-off decrease of over 10% in the issuer's net profit (by Russian Accounting Standards)

1. An event that caused a one-off decrease of over 10% in the issuer's net profit: The drop in net profit upon 4 quarter 2009 was caused by reappraisal of financial investments evaluated by current market value amounting to 21,711,129,000 rubles and charge of a reserve on doubtful debts at rate of 1,617,000,000 rubles

2. The date of even that caused a one-off decrease of over 10% in the Issuer's net profit -  30 April 2010

3. The value of the Issuer's net profit over the reporting period preceding the reporting period during which the material fact occurred (4 quarter of 2009): -15,514,790,000 rubles (by Russian Accounting Standards)

4. The value of the Issuer's net profit over the reporting period (a quarter, a year) during which the material fact occurred (1 quarter of 2010): 11,083,855,000 rubles (by Russian Accounting Standards)

5. Variation of the Issuer's net profit in absolute terms and percentage-wise:

In absolute terms: 26,598,645,000 rubles

Percentage-wise: 171,44%.

JSC RusHydro Member of the

Management Board E.E. Gorev

(pursuant to the power of attorney No.2576 of 24.11.2009)

JSC RusHydro Chief Accountant O.V. Otto