EQUITY METHOD INVESTMENTS

Our equity method investments consisted of the following (in thousands):



	March 31, 2018		December 31, 2017
White Cliffs Pipeline, L.L.C.	$	260,126	$	266,362
NGL Energy Partners LP	18,928		18,919
Total equity method investments	$	279,054	$	285,281

Our earnings from equity method investments consisted of the following (in thousands):



	Three Months Ended March 31,
	2018		2017
White Cliffs Pipeline, L.L.C.	$	12,605	$	15,193
Glass Mountain Pipeline, LLC	—		1,895
NGL Energy Partners LP	9		3
Total earnings from equity method investments	$	12,614	$	17,091

Cash distributions received from equity method investments consisted of the following (in thousands):



	Three Months Ended March 31,
	2018		2017
White Cliffs Pipeline, L.L.C.	$	19,150	$	18,190
Glass Mountain Pipeline, LLC	—		3,503
Total cash distributions received from equity method investments	$	19,150	$	21,693

White Cliffs Pipeline, L.L.C.

We own a 51% interest in White Cliffs Pipeline, L.L.C. (“White Cliffs”), which we account for under the equity method. Certain unaudited summarized income statement information of White Cliffs for the three months ended March 31, 2018 and 2017, is shown below (in thousands):



	Three Months Ended March 31,
	2018		2017
Revenue	$	40,391	$	50,184
Cost of products sold, exclusive of depreciation and amortization shown below	$	384	$	4,113
Operating, general and administrative expenses	$	5,402	$	6,240
Depreciation and amortization expense	$	9,592	$	9,256
Net income	$	25,014	$	30,575

Our equity in earnings of White Cliffs for the three months ended March 31, 2018 and 2017, is less than 51% of the net income of White Cliffs for the same periods. This is due to certain general and administrative expenses we incur in managing the operations of White Cliffs that the other owners are not obligated to share.

Glass Mountain Pipeline, LLC

On December 22, 2017, we completed the sale of our equity method investment in Glass Mountain Pipeline LLC (“Glass Mountain”) for $300 million, subject to working capital and other adjustments. Proceeds from the sale were used to repay borrowings on SemGroup's revolving credit facility.

NGL Energy Partners LP

We own an 11.78% interest in the general partner of NGL Energy Partners LP (NYSE: NGL) (“NGL Energy”) which is being accounted for under the equity method in accordance ASC 323-30-S99-1, as our ownership is in excess of the 3 to 5 percent interest which is generally considered to be more than minor. The general partner of NGL Energy is not a publicly traded company.