Exhibit FIRST AMENDMENT This FIRST AMENDMENT, dated as of April 15, 2009 (this "Amendment") , amends that certain AMENDED AND RESTATED CREDIT AGREEMENT, dated as of July 6, 2006 (the "Credit Agreement") , among MIDAMERICAN ENERGY HOLDINGS COMPANY, an Iowa corporation ("Borrower") , the banks listed on the signature pages thereto (the "Banks") , JPMORGAN CHASE BANK, N.A., as L/C Issuer, UNION BANK, N.A. (formerly known as Union Bank of California, N.A.) , as administrative agent for the Banks (in such capacity, the "Agent") , THE ROYAL BANK OF SCOTLAND PLC, as Syndication Agent, and JPMORGAN CHASE BANK, N.A., ABN AMRO BANK N.V. and BNP PARIBAS, as Co Documentation Agents.