6.	Borrowings Under Credit Facilities

InfraREIT LP Revolving Credit Facilities

In 2014, InfraREIT LP entered into a credit agreement that established a revolving credit facility of $130.0 million that included a letter of credit facility. In December 2014, the credit facility was repaid and terminated using proceeds from InfraREIT LP’s $75.0 million credit facility and SDTS’s amended credit agreement entered into in December 2014, as discussed below.

In December 2014, InfraREIT LP entered into a $75.0 million revolving credit facility, led by Bank of America, N.A., as administrative agent, with up to $15.0 million available for issuance of letters of credit and a maturity date of December 10, 2019. The revolving credit facility is secured by certain assets of InfraREIT LP, including accounts and other personal property, and is guaranteed by the Company and Transmission and Distribution Company, L.L.C. (TDC), with the TDC guarantee secured by the assets of, and InfraREIT LP’s equity interests in, TDC on materially the same basis as TDC’s senior secured notes described below in Note 7, Long-Term Debt.

Borrowings and other extensions of credit under the revolving credit facility bear interest, at InfraREIT LP’s election, at a rate equal to (1) the one, two, three or six month London Interbank Offered Rate (LIBOR) plus 2.5%, or (2) a base rate (equal to the highest of (a) the Federal Funds Rate plus ½ of 1%, (b) the Bank of America prime rate and (c) LIBOR plus 1%) plus 1.5%. Letters of credit are subject to a letter of credit fee equal to the daily amount available to be drawn times 2.5%. InfraREIT LP is also required to pay a commitment fee and other customary fees under the revolving credit facility. InfraREIT LP may prepay amounts outstanding under the revolving credit facility in whole or in part without premium or penalty.

As of December 31, 2016 and 2015, there were no borrowings or letters of credit outstanding and there was $75.0 million of borrowing capacity available under the revolving credit facility. As of December 31, 2016 and 2015, InfraREIT LP was in compliance with all debt covenants under the credit agreement.

SDTS Revolving Credit Facilities

In 2013, SDTS entered into a second amended and restated credit agreement led by Royal Bank of Canada, as administrative agent, which established a revolving credit facility of $75.0 million including a letter of credit facility. In December 2014, SDTS entered into the third amended and restated credit agreement increasing the borrowing capacity up to $250.0 million with a maturity date of December 10, 2019. Up to $25.0 million of the revolving credit facility is available for issuance of letters of credit, and up to $5.0 million of the revolving facility is available for swingline loans. The revolving credit facility is secured by SDTS’s T&D assets, the leases, certain accounts and TDC’s equity interests in SDTS on the same basis as SDTS’s various senior secured note obligations described in Note 7, Long-Term Debt.

The interest rate for the revolving credit facility is based, at SDTS’s option, at a rate equal to either (1) a base rate, determined as the greatest of (a) the administrative agent’s prime rate, (b) the federal funds effective rate plus ½ of 1% and (c) LIBOR plus 1.00% per annum, plus a margin of either 0.75% or 1.00% per annum, depending on the total debt to capitalization ratio of SDTS on a consolidated basis or (2) LIBOR plus a margin of either 1.75% or 2.00% per annum, depending on the total debt to capitalization ratio of SDTS on a consolidated basis. SDTS is also required to pay a commitment fee and other customary fees under its revolving credit facility. SDTS is entitled to prepay amounts outstanding under the revolving credit facility with no prepayment penalty.

As of December 31, 2016, SDTS had $137.5 million of borrowings outstanding at a weighted average interest rate of 2.50%, no letters of credit outstanding and $112.5 million of remaining borrowing capacity available under this revolving credit facility. As of December 31, 2015, SDTS had $54.0 million of borrowings outstanding at a weighted average interest rate of 2.05% with no letters of credit outstanding and $196.0 million of borrowing capacity available under this revolving credit facility. As of December 31, 2016 and 2015, SDTS was in compliance with all debt covenants under the credit agreement.

The credit agreements require InfraREIT LP and SDTS to comply with customary covenants for facilities of this type, including: debt to capitalization ratios, debt service coverage ratios, limitations on additional debt, liens, investments, mergers, acquisitions, dispositions or entry into any line of business other than the business of the transmission and distribution of electric power and the provision of ancillary services and certain restrictions on the payment of dividends. The debt to capitalization ratio on the SDTS credit facility is calculated on a combined basis with Sharyland. The credit agreements also contain restrictions on the amount of Sharyland’s indebtedness and other restrictions on, and covenants applicable to, Sharyland.

The revolving credit facilities of InfraREIT LP and SDTS are subject to customary events of default. If an event of default occurs under either facility and is continuing, the lenders may accelerate amounts due under such revolving credit facility.