As filed with the Securities and Exchange Commission on October 12, 1999 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 - SEPTEMBER 30, 1999 Commission Registrant, State of Incorporation I.R.S. Employer File Number Address and Telephone Number Identification No. - ----------- ----------------------------------- ------------------ 0-25595 NIAGARA MOHAWK HOLDINGS, INC. 16-1549726 (a New York corporation) 300 Erie Boulevard West Syracuse, New York 13202 Telephone 315-474-1511 1-2987 NIAGARA MOHAWK POWER CORPORATION 15-0265555 (a New York corporation) 300 Erie Boulevard West Syracuse, New York 13202 Telephone 315-474-1511 Item 5. Other Events -------------------- (a) On September 30, 1999, the U.S. Nuclear Regulatory Commission (NRC) released its mid-cycle plant performance review of Niagara Mohawk Power Corporation's nuclear plants. An NRC public meeting will take place on October 22, 1999, where recent plant performance will be reviewed. See letter from NRC regarding Mid-cycle Plant Performance Review - Nine Mile Point Nuclear Station attached (Exhibit No. 99-1). (b) On October 6, 1999, Niagara Mohawk Power Corporation issued a press release regarding an agreement to sell its Albany oil and gas-fired electric generating station. See press release attached (Exhibit No. 99-2). Item 7. Financial Statements and Exhibits - ------------------------------------------ Exhibits - Following is the list of Exhibits furnished in accordance with the provisions of Item 601 of Regulation S-K, filed as part of this current report on Form 8-K. Exhibit No. 99-1 - Letter from Nuclear Regulatory Commission regarding Mid-cycle Plant Performance Review - Nine Mile Point Nuclear Station. Exhibit No. 99-2 - Press release issued on October 6, 1999, relating to Niagara Mohawk Power Corporation's agreement to sell its Albany oil and gas-fired electric generating station. NIAGARA MOHAWK HOLDINGS, INC. AND SUBSIDIARY COMPANIES SIGNATURE --------- Pursuant to the requirements of the Securities Exchange Act of 1934, the Registrants have duly caused this report to be signed on their behalf by the undersigned thereunto duly authorized. NIAGARA MOHAWK HOLDINGS, INC. ----------------------------- (Registrant) Date: October 12, 1999 By: /s/Steven W. Tasker -------------------- Steven W. Tasker Vice President-Controller and Principal Accounting Officer, in his respective capacities as such NIAGARA MOHAWK POWER CORPORATION -------------------------------- Registrant) Date: October 12, 1999 By: /s/Steven W. Tasker ------------------- Steven W. Tasker Vice President-Controller and Principal Accounting Officer, in his respective capacities as such EXHIBIT INDEX ------------- Following is the index of Exhibits furnished in accordance with the provisions of Item 601 of Regulation S-K, filed as part of this current report on Form 8-K. Exhibit No. 99-1 - Letter from Nuclear Regulatory Commission regarding Mid-cycle Plant Performance Review - Nine Mile Point Nuclear Station (without enclosures). Exhibit No. 99-2 - Press release issued on October 6, 1999, relating to Niagara Mohawk Power Corporation's agreement to sell its Albany oil and gas-fired electric generating station.