Long-term Debt

Revolving Credit Facility. As of December 31, 2012 and June 30, 2013, CenterPoint Houston had the following revolving credit facility and utilization of such facility (in millions):



		December 31, 2012				June 30, 2013
Size of Facility		Loans		Letters of Credit		Loans		Letters of Credit
$	300	$	—	$	4	$	—	$	4

CenterPoint Houston’s $300 million credit facility, which is scheduled to terminate September 9, 2016, can be drawn at the London Interbank Offered Rate plus 125 basis points based on CenterPoint Houston’s current credit ratings. The facility contains a debt (excluding transition and system restoration bonds) to total capitalization covenant, limiting debt to 65% of its total capitalization.

Other. At both December 31, 2012 and June 30, 2013, CenterPoint Houston had issued $151 million of first mortgage bonds as collateral for long-term debt of CenterPoint Energy. As of both December 31, 2012 and June 30, 2013, CenterPoint Houston had issued $408 million of general mortgage bonds as collateral for long-term debt of CenterPoint Energy. These bonds are not reflected in the consolidated financial statements because of the contingent nature of the obligations.

On August 1, 2013, in connection with the redemption of approximately $92 million aggregate principal amount of pollution control bonds issued on behalf of CenterPoint Energy, CenterPoint Houston prepaid a note payable to its sole member, having an aggregate principal amount of approximately $92 million and bearing interest at an annual rate of 4%, at 101% of the principal amount of the note. As of June 30, 2013, this note payable was included in Accounts and notes payable - affiliated companies on the Condensed Consolidated Balance Sheets. The redeemed pollution control bonds were collateralized by approximately $92 million aggregate principal amount of CenterPoint Houston's first mortgage bonds that were retired on August 1, 2013 in connection with the redemption.