9. DEBT AND INTEREST EXPENSE

At June 30, 2016, WGP’s debt consisted of borrowings on the WGP RCF, WES’s 5.375% Senior Notes due 2021 (the “2021 Notes”), 4.000% Senior Notes due 2022 (the “2022 Notes”), 2.600% Senior Notes due 2018 (the “2018 Notes”), 5.450% Senior Notes due 2044 (the “2044 Notes”), 3.950% Senior Notes due 2025 (the “2025 Notes”), and borrowings on the WES RCF.

The following table presents WES and WGP’s outstanding debt as of June 30, 2016, and December 31, 2015:



	June 30, 2016						December 31, 2015
thousands	Principal		Carrying Value		Fair Value ⁽¹⁾		Principal		Carrying Value		Fair Value ⁽¹⁾
WGP RCF	$	28,000	$	28,000	$	28,000	$	—	$	—	$	—
2021 Notes	500,000		494,215		529,064		500,000		493,711		513,645
2022 Notes	670,000		668,532		658,273		670,000		668,432		595,744
2018 Notes	350,000		348,946		348,908		350,000		348,706		339,293
2044 Notes	400,000		389,783		384,252		400,000		389,707		321,499
2025 Notes	500,000		490,528		479,690		500,000		490,095		422,285
WES RCF	540,000		540,000		540,000		300,000		300,000		300,000
Total long-term debt	$	2,988,000	$	2,960,004	$	2,968,187	$	2,720,000	$	2,690,651	$	2,492,466


⁽¹⁾	Fair value is measured using the market approach and Level 2 inputs.

Debt activity. The following table presents WES and WGP’s debt activity for the six months ended June 30, 2016:



thousands	Carrying Value
Balance at December 31, 2015	$	2,690,651
WES RCF borrowings	530,000
Repayments of WES RCF borrowings	(290,000		)
WGP RCF borrowings	28,000
Other	1,353
Balance at June 30, 2016	$	2,960,004

WGP RCF. In March 2016, WGP entered into a $250.0 million WGP RCF which matures in March 2019. The WGP RCF may be used to buy WES common units and for general partnership purposes. The WGP RCF contains an accordion feature whereby WGP can increase the commitments under the WGP RCF up to an aggregate of $500.0 million, subject to receiving increased or new commitments from lenders and the satisfaction of certain other conditions precedent. The WGP RCF contains certain customary affirmative and negative covenants, including the maintenance of a consolidated leverage ratio of not more than 3.50 to 1.00 and limitations on the ability of WGP and WES GP to, among other things, (i) materially alter the character of their business on a consolidated basis from the midstream energy business, (ii) create, assume or suffer to exist liens on their assets, (iii) enter into transactions with affiliates, (iv) make distributions upon the occurrence of certain events of default, (v) create, incur or assume indebtedness, (vi) make dispositions of their assets, (vii) enter into sale and leasebacks and (vi) consolidate with or merge into any other entity or convey, transfer or lease their properties and assets substantially as an entirety to any person or entity.

9. DEBT AND INTEREST EXPENSE (CONTINUED)

WGP borrowed $28.0 million under the WGP RCF to fund the purchase of 835,841 WES common units (see Note 2) and to pay fees and expenses associated with entering into the WGP RCF. Pursuant to a collateral agreement with the WGP RCF lenders, WGP’s obligations under the WGP RCF are secured by a first priority lien on all of WGP’s assets (not including the consolidated assets of WES), as well as all present and after acquired equity interests owned by WGP in WES GP and WES. Borrowings under the WGP RCF bear interest, at WGP’s option, at either (a) a base rate equal to the greatest of (i) the Prime Rate, (ii) the Federal Funds Effective Rate plus 0.50% and (iii) LIBOR plus 1.00%, in each case plus applicable margins ranging from 1.00% to 1.75% based upon WGP’s consolidated leverage ratio or (b) LIBOR (with a floor of 0%), plus applicable margins ranging from 2.00% to 2.75% based upon WGP’s consolidated leverage ratio. The unused portion of the WGP RCF is subject to a quarterly commitment fee ranging from 0.30% to 0.50% per annum on the daily unused amount of the WGP RCF based upon WGP’s consolidated leverage ratio. At June 30, 2016, the interest rate and commitment fee rate on the WGP RCF was 2.72% and 0.35%, respectively.

As of June 30, 2016, WGP had $28.0 million of outstanding borrowings ($222.0 million available borrowing capacity) and was in compliance with all covenants under the WGP RCF.

WGP WCF. The interest rate on the WGP WCF, which matures in November 2017, was 1.97% and 1.69% at June 30, 2016 and 2015, respectively.

As of June 30, 2016, WGP had no outstanding borrowings and $30.0 million available for borrowing under the WGP WCF. At June 30, 2016, WGP was in compliance with all covenants under the WGP WCF.

WES Senior Notes. At June 30, 2016, WES was in compliance with all covenants under the indentures governing its outstanding notes.

In July 2016, WES issued $500.0 million aggregate principal amount of 4.650% Senior Notes due 2026 (the “2026 Notes”) which were offered at a price to the public of 99.796% of the face amount. Interest is paid semi-annually on January 1 and July 1 of each year. Proceeds (net of underwriting discount of $3.1 million, original issue discount and debt issuance costs) were used to repay a portion of the amount outstanding under the WES RCF.

WES RCF. The interest rate on the WES RCF, which matures in February 2019, was 1.77% and 1.49% at June 30, 2016 and 2015, respectively. The facility fee rate was 0.20% at June 30, 2016 and 2015.

As of June 30, 2016, WES had $540.0 million of outstanding borrowings, $4.9 million in outstanding letters of credit and $655.1 million available for borrowing under the WES RCF. At June 30, 2016, WES was in compliance with all covenants under the WES RCF.

In April 2016, WES repaid $250.0 million of outstanding borrowings under the WES RCF, $246.9 million of which was funded with the proceeds from the issuance of the April 2016 Series A unit issuance (see Note 4).

Interest rate agreements. In June 2016, WES entered into a U.S. Treasury rate lock agreement to mitigate the risk of rising interest rates on existing variable-rate debt expected to be refinanced during the third quarter of 2016. The rate lock agreement was not designated as a cash flow hedge and was settled in June 2016 upon the offering of the WES 2026 Notes that closed in July 2016. WES realized a loss of $0.2 million at settlement, which is included in Other income (expense), net in the consolidated statements of operations.

9. DEBT AND INTEREST EXPENSE (CONTINUED)

Interest expense. The following table summarizes the amounts included in interest expense:



	Three Months Ended June 30,						Six Months Ended June 30,
thousands	2016			2015			2016			2015
Third parties
Long-term debt	$	28,472		$	24,733		$	56,328		$	48,075
Amortization of debt issuance costs and commitment fees	1,900			1,374			3,495			2,666
Capitalized interest	(1,482		)	(2,693		)	(3,331		)	(5,787		)
Total interest expense – third parties	28,890			23,414			56,492			44,954
Affiliates
WGP WCF	—			—			—			2
Deferred purchase price obligation – Anadarko ⁽¹⁾	(15,461		)	4,190			(10,924		)	5,610
Total interest expense – affiliates	(15,461		)	4,190			(10,924		)	5,612
Interest expense	$	13,429		$	27,604		$	45,568		$	50,566


⁽¹⁾	See Note 2 for a discussion of the accretion and net present value of the Deferred purchase price obligation - Anadarko.