Exhibit 10.1 THE BROOKLYN UNION GAS COMPANY, doing business as KEYSPAN ENERGY DELIVERY NEW YORK 5.60% Senior Unsecured Notes due November 29, 2016 NOTE PURCHASE AGREEMENT Dated as of November 29, 2006 TABLE OF CONTENTSNote Purchase Agreement • December 5th, 2006 • Keyspan Corp • Natural gas distribution • New York
