SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): June 25, 1998 NIAGARA MOHAWK POWER CORPORATION (Exact name of registrant as specified in its charter) New York 1-2987 15-0265555 (State or other jurisdiction (Commission File (IRS Employer of incorporation) Number) Identification Number) 300 Erie Boulevard, West Syracuse, NY 13202 (Address of principal executive offices) Registrant's telephone number, including area code: (315) 474-1511 Item 7. Financial Statements and Exhibits Niagara Mohawk Power Corporation is filing herewith the following exhibits: (c) Exhibits. EXHIBIT NUMBER DESCRIPTION - - ------- ----------- 1 Underwriting Agreement, dated June 25, 1998, among Niagara Mohawk Power Corporation and Donaldson, Lufkin & Jenrette Securities Corporation, Merrill Lynch, Pierce, Fenner & Smith Incorporated, Smith Barney Inc., Wasserstein Perella Securities, Inc. and CIBC Oppenheimer Corp. -2- SIGNATURES Pursuant to the requirements of the Securities Exchange Act of 1934, the Registrant has duly caused this Report to be signed on its behalf by the undersigned thereunto duly authorized. NIAGARA MOHAWK POWER CORPORATION By: /s/ Kapua A. Rice ------------------------------------ Name: Kapua A. Rice Title: Corporate Secretary Dated: July 2, 1998 -3-