EXHIBIT 15
 
                   LETTER RE UNAUDITED FINANCIAL INFORMATION
 
Securities and Exchange Commission
450 Fifth Street, N.W.
Washington, D.C. 20549
 
    Re: Oglethorpe Power Corporation
       Registration on Form S-4
 
    We are aware that our report dated November 14, 1997, on our review of the
condensed interim financial statements of Oglethorpe Power Corporation for the
twelve-month period ended September 30, 1997 is included in this Registration
Statement. Pursuant to Rule 436(c) under the Securities Act of 1933, this report
should not be considered a part of the Registration Statement prepared or
certified by us within the meaning of Sections 7 and 11 of that Act.
 
                                          COOPERS & LYBRAND L.L.P.
 
Atlanta, Georgia,
December 16, 1997.