Borrowings

Line of Credit

On November 30, 2016, ADA-ES, Inc., a wholly-owned subsidiary of the Company ("ADA"), as borrower, the Company, as guarantor, and a bank (the "Lender") entered into an amendment (the "Tenth Amendment") to the 2013 Loan and Security Agreement (the "Line of Credit" or "LOC"). The Tenth Amendment increased the Line of Credit to $15 million, extended the maturity date of the Line of Credit to September 30, 2017 and permitted the Line of Credit to be used as collateral (in place of restricted cash) for letters of credit ("LC's") related to equipment projects, the Royalty Award, as defined in Note 6, and certain other agreements. Additionally, this amendment secured the Line of Credit with amounts due to the Company from an additional existing Refined Coal facility lease, which amounts also factor into the borrowing base limitation, and amended certain financial covenants. Pursuant to the Tenth Amendment, the Company was required to maintain a deposit account with the Lender, initially with a minimum balance of $6.0 million, and as of June 30, 2017, $3.0 million, based on the Company meeting certain conditions and maintaining minimum trailing twelve month EBITDA (earnings before interest, taxes, depreciation and amortization as defined in the Tenth Amendment) of $24.0 million. The minimum deposit balances are classified as Restricted Cash on the Condensed Consolidated Balance Sheets as of June 30, 2017 and December 31, 2016.

As of June 30, 2017, there were no outstanding borrowings under the Line of Credit, however, LC's in the aggregate amount of $10.7 million were secured under the Line of Credit, resulting in borrowing availability of $4.3 million.

Letters of Credit

The Company has LC's related to equipment projects, the Royalty Award and certain other agreements. During March 2017, a customer drew on an LC related to an equipment system in the amount of $0.8 million, which was funded by borrowing availability under the Line of Credit. The Company subsequently repaid this amount to the Lender as of March 31, 2017. The Company is contesting the draw on this LC and is pursuing actions to recover this amount from the customer. This amount is included in Other long-term assets on the Condensed Consolidated Balance Sheets.

The following tables summarize the LC's outstanding and collateral, by asset type, reported on the Condensed Consolidated Balance Sheets:



	As of June 30, 2017
(in thousands)	LC Outstanding		Utilization of LOC Availability		Restricted Cash
Contract performance - equipment systems	$	83	$	83	$	—
Royalty Award	10,650		10,650		—
Total LC outstanding	$	10,733	$	10,733	$	—



	As of December 31, 2016
(in thousands)	LC Outstanding		Utilization of LOC Availability		Restricted Cash
Contract performance - equipment systems	$	1,855	$	1,776	$	86
Royalty Award	7,150		—		7,150
Total LC outstanding	$	9,005	$	1,776	$	7,236

Credit Agreement

On June 30, 2016, the Company, the required lenders and the administrative lender under a $15.0 million short-term loan (the "Credit Agreement") agreed to terminate the Credit Agreement prior to the maturity date of July 8, 2016, effective upon the Company’s prepayment on June 30, 2016 of $9.9 million, which was comprised of the total principal balance of the loan and advances made to or for the benefit of the Company, together with all accrued but unpaid interest, and the total amount of all fees, costs, expenses and other amounts owed by the Company thereunder, including a prepayment premium.

Tinuum Group - RCM6 Note Payable

The Company acquired a 24.95% membership interest in RCM6 from Tinuum Group in February 2014 through an up-front payment and a note payable (the "RCM6 Note Payable"). Due to the payment terms of the note purchase agreement, the RCM6 Note Payable periodically added interest to the outstanding principal balance. The stated rate associated with the RCM6 Note Payable was 1.65% and the effective rate of the RCM6 Note Payable at inception was 20%. As discussed in Note 2, on March 3, 2016, the Company sold its 24.95% membership interest in RCM6 and, as a result, the Company has no future obligations related to the previously recorded RCM6 Note Payable.

DSI Business Owner

In February 2016, the Company entered into an agreement to settle an outstanding note payable of approximately $1.1 million for $0.3 million with the former owner of a business ("DSI Business Owner") acquired by the Company in 2012, which was paid during the first quarter of 2016. The Company recognized a gain related to the settlement of $0.9 million, which is included in the Other line item in the Condensed Consolidated Statements of Operations for the six months ended June 30, 2016.