Exhibit 5(a) THE MONTANA POWER COMPANY 40 East Broadway Butte, MT 59701 December 5, 1994 The Montana Power Company 40 East Broadway Butte, MT 59701 Ladies and Gentlemen: With respect to the Registration Statement to be filed with the Securities and Exchange Commission pursuant to the Securities Act of 1933, as amended, on or about the date hereof, contemplating the sale of 85,000 shares of its Common Stock (the "Stock"), I am of the opinion that: 1. The Company is a corporation duly organized and validly existing under the laws of the State of Montana and qualified to do business in the States of Idaho and Wyoming. 2. The Stock has been legally and validly issued and is fully paid and nonassessable. I hereby consent to the use of this opinion as an exhibit to the Registration Statement, and the use of my name, as counsel, therein. Very truly yours, /s/ Michael E. Zimmerman MICHAEL E. ZIMMERMAN Vice President and General Counsel