OGLETHORPE POWER SECOND QUARTER INVESTOR BRIEFING CALL TO BE HELD AUGUST 18

TUCKER, GA (August 11, 2010) – Oglethorpe Power Corporation Executive Vice President and Chief Operating Officer Michael W. Price and Executive Vice President and Chief Financial Officer Elizabeth B. Higgins will discuss second quarter results during a conference call at 11:00 a.m. Eastern on Wednesday, August 18, 2010.  Investors, media and the public may view a live internet webcast or join via telephone.

How to Participate:

Joining Via Telephone:

Domestic Toll-Free Dial-in Number:  800-299-0433

International Dial-in Number: 617-801-9712

Passcode:  14752023

Joining Via the Internet:

Please navigate to the following web address to view the webcast:

http://phx.corporate-ir.net/phoenix.zhtml?p=irol-eventDetails&c=228245&eventID=3287484

Instruction on how to submit questions will be provided during the call.  If you have additional questions, please contact Thomas J. Brendiar, Oglethorpe's Director of Bank and Investor Relations at 770-270-7173.

A replay of the webcast will be accessible from the company's website (www.opc.com) following the webcast (from Oglethorpe’s home page, click on “Investor Relations” and then “Quarterly Investor Presentations”).

About Oglethorpe Power

Oglethorpe is the nation's largest power supply cooperative with approximately $6.5 billion in assets serving 39 Electric Membership Corporations which, collectively, provide electricity to 4.1 million Georgia citizens.  A proponent of conscientious energy development and use, Oglethorpe balances reliable affordable energy with environmental responsibility and has an outstanding record of regulatory compliance.  Its diverse energy portfolio includes natural gas, hydroelectric, coal, and nuclear generating plants with combined capacity of approximately 5,790 MW, as well as purchased power.  Oglethorpe was established in 1974 and is owned by its 39 member systems.  It is headquartered in Tucker, GA.