2nd Quarter Results (Russian Accounting Standards)

30 July 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: additional profit in the 1 quarter of 2010 is connected with acquisition of income in conjunction with insurance compensation accrual.

2. The date of event that caused a one-off decrease of over 10% in the issuer's net profit - July 30, 2010.

3. The value of the issuer's net profit over the reporting period preceding the reporting period during which the material fact occurred (1 quarter of 2010): 11,083,855 thous. rub. (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 (2 quarter of 2010): 9,645,050 thous. rub. (by Russian Accounting Standards).

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

In absolute terms: 1,438,805 thous. rub.

Percentage-wise: 12.98%

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 D.V. Finkel